CN104852877B - Signal receiving device and two-stage adaptive equalization method thereof - Google Patents

Abstract

The present invention provides a signal receiving device, which includes an equalization module, a coarse adjustment module and a fine adjustment module. The equalization module is used to receive an input signal and perform an equalization process on the input signal according to an equalization strength to generate an equalized signal. The coarse adjustment module adjusts the equalization strength according to the equalized signal until the equalized signal meets a preliminary convergence condition. After the processed signal meets the preliminary convergence condition, the fine adjustment module adjusts the equalization strength according to the equalized signal until the equalization strength meets a final convergence condition.

Description

Signal receiving device and its two-stage adaptive equalization method

technical field

The present invention is related to the technique of applying an equalization procedure to a signal.

Background technique

The equalizer is a necessary component in the receiving end of many communication systems, which is used to compensate or eliminate the distortion/attenuation caused by the unideal channel factors in the transmission process of the signal. Only by properly equalizing the input signal (for example, selecting an appropriate equalization strength), the receiving end can correctly interpret and use the received data. Taking the DisplayPort (DP) video interface promoted by the Video Electronics Standards Association (VESA) as an example, its specification stipulates that the receiving end must complete the clock recovery (clock recovery) program. Balanced processing.

The operating frequency of the early DisplayPort video interface was low (1.62 MHz or 2.7 MHz), and the receiving end usually only needed to use a fixed equalization strength to make the receiving end circuit work normally. However, the new version of the DisplayPort video interface has a higher operating frequency (5.4 MHz) and a lower error tolerance rate. Using a fixed equalization strength may result in a decrease in the performance of the receiving device.

Contents of the invention

The invention proposes a new signal receiving device and a two-stage adaptive equalization method thereof. In an embodiment according to the present invention, the process of selecting the equalization strength is divided into two stages, coarse tuning and fine tuning, and each of the two stages has different convergence conditions. In addition to adaptively adjusting the equalization strength according to the input signal, the signal receiving device and equalization method according to the present invention can also ensure that the finally selected equalization strength converges within the correct range through the inspection of two adjustment stages.

The application of the concept of the present invention is not limited to a specific signal receiving device, but can be widely implemented in various occasions that require adaptive equalization processing, such as using Display Port (DP) video interface, high definition multimedia interface (highdefinition multimedia interface, HDMI ), mobile high-definition link (MHL) interface, serial advanced technology attachment (SATA) interface, universal serial bus 3.0 (USB3.0) interface and other standard electronic systems.

A specific embodiment according to the present invention is a signal receiving device, which includes an equalization module, a rough adjustment module and a fine adjustment module. The equalization module is used to receive an input signal, and apply an equalization process to the input signal according to an equalization intensity to generate an equalized signal. The coarse adjustment module adjusts the equalization strength according to the equalized signal until the equalized signal meets a preliminary convergence condition. After the processed signal meets the initial convergence condition, the fine-tuning module adjusts the equalization strength according to the equalized signal until the equalization strength meets a final convergence condition.

Another specific embodiment according to the present invention is a two-stage adaptive equalization method applied to a signal receiving device. Firstly, an input signal is subjected to an equalization process according to an equalization strength to generate an equalized signal. Then, according to the equalized signal, the equalization strength is adjusted until the processed signal meets a preliminary convergence condition. After the equalized signal meets the initial convergence condition, the equalization strength is adjusted according to the equalized signal again until the equalization strength meets a final convergence condition.

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a functional block diagram of a signal receiving device according to an embodiment of the present invention.

Fig. 2 presents an embodiment in which the coarse adjustment module according to the invention comprises a symbol counting unit.

FIG. 3 presents a detailed implementation example of the fine-tuning module according to the present invention.

FIG. 4A and FIG. 4B show signal waveform examples of two data strings whose contents are 0010.

FIG. 4C presents an example of the relative relationship between equalization intensity and time.

FIG. 5 presents an example of further employing phase stability notification in the signal receiving device according to the present invention.

FIG. 6 shows an example in which the signal receiving device further cooperates with the clock generating circuit according to the present invention.

FIG. 7 shows an example in which the signal receiving device according to the present invention further cooperates with a control module to perform a setting test.

FIG. 8 is a flowchart of a two-stage adaptive equalization method according to an embodiment of the present invention.

9A and 9B respectively present an example of a partial flow in an adaptive equalization method according to the present invention.

Explanation of component numbers in the figure:

100: Signal receiving device 11A: Sampling module

11B: Phase adjustment module 12: Equalization module

13A: local oscillator source 13B: clock signal generation module

14: Coarse adjustment module 14A: Symbol counting unit

15: Control module 16: Fine-tuning module

16A: search unit 16B: status judgment unit

16C: Intensity adjustment unit 18: Multiplexer

19: Clock data recovery module S82～S88: Process steps

I0～I3, Q0～Q2: Sampling points S901～S903: Process steps

S911～S920: process steps

Detailed ways

A specific embodiment according to the present invention is a signal receiving device, the functional block diagram of which is shown in FIG. 1 . The signal receiving device 100 in this embodiment includes an equalization module 12 , a rough adjustment module 14 , a fine adjustment module 16 , a multiplexer 18 and a clock data recovery module 19 . The equalization module 12 is used for receiving an input signal and applying an equalization process to the input signal to generate an equalized signal. The equalization strength of the equalization process can be set to an initial value first. For example, the equalization intensity of the equalization process has 32 levels and is represented as level 0 to level 31, then the initial value may be but not limited to level 0. In other words, the equalization module 12 initially performs the equalization process with the initial equalization intensity.

As shown in FIG. 1 , the equalized signal output by the equalization module 12 is delivered to the clock data recovery module 19 to generate a recovered data signal. The multiplexer 18 is initialized to select an input terminal for connecting the coarse adjustment module 14 to the equalization module 12 ; the input terminal is used for receiving a control signal for adjusting the equalization strength of the equalization module 12 . The coarse adjustment module 14 receives the returned data signal, and generates a coarse adjustment control signal accordingly. More specifically, the coarse adjustment module 14 adjusts the equalization strength used by the equalization module 12 according to the restored data signal until the restored data signal meets a preliminary convergence condition. For example, the coarse adjustment module 14 first determines whether the corresponding recovered data signal meets the initial convergence condition for the initial equalization strength. If not, the coarse adjustment module 14 will change the equalization strength of the equalization module 12 through the coarse adjustment control signal (for example, from level 0 to level 3), and judge again whether the restored data signal corresponding to the level 3 equalization strength conforms to Preliminary convergence conditions. After the rough adjustment module 14 judges that the data signal corresponding to a certain equalization strength meets the initial convergence condition, the rough adjustment module 14 will stop adjusting the equalization strength, and send a preliminary convergence notification to the multiplexer 18 to multiplex The device 18 is changed to connect the fine-tuning module 16 and the equalization module 12.

In practice, the amount of change of the equalization intensity for each update of the rough adjustment module 14 is not limited to a specific size, and can be determined by the circuit designer or user. For example, the equalization strength can be changed successively in the following order: level 0, level 3, level 6, . . . , level 30, level 0, level 3, . . . In addition, the circuit designer can also set the upper and lower limits of the equalization strength for this coarse adjustment stage, for example, the equalization strength can be changed in the following order: level 10, level 13, level 16, level 19, level 22, level 25, level 22 , level 19, level 16, level 13, level 10, ....

In practical applications, there may be more than one preliminary convergence condition; the coarse adjustment module may wait for several preliminary convergence conditions to be met before sending the preliminary convergence notification. In one embodiment, the coarse tuning module 14 generates and analyzes an eye diagram of the restored data signal, and the preliminary convergence condition is whether the degree of expansion of the eye diagram is higher than a threshold. It should be noted that the generation and analysis methods of the eye diagram are known to those of ordinary skill in the technical field to which the present invention belongs, and will not be repeated here.

In another embodiment, the preliminary convergence condition is whether the number of known specific symbols included in the restored data signal is higher than a number threshold. As shown in FIG. 2 , the rough adjustment module 14 may include a symbol counting unit 14A for searching a plurality of target symbols in the recovered data signal and accumulating the total number of the target symbols appearing within a certain period of time. Taking DisplayPort (DP) interface as an example, before formally transmitting video data, the transmitting end will firstly provide a training sequence to the receiving end, and the content of the training sequence includes multiple K28.5 bit strings. For a certain equalization strength, the symbol counting unit 14A can search and accumulate the total number of K28.5 bit strings corresponding to the recovered data signal within a certain period of time. If the accumulation result of the symbol counting unit 14A is higher than the aforementioned number threshold (for example, 500), the coarse adjustment module 14 will determine that the returned data signal meets the preliminary convergence condition. On the contrary, if the accumulation result corresponding to a certain equalization intensity does not reach the quantity threshold, the coarse adjustment module 14 can change the equalization intensity, and start searching and accumulating target symbols again. Satisfying this initial convergence condition means that the current equalization strength is sufficient to allow subsequent circuits to roughly correctly interpret the signal content.

It should be noted that the above-mentioned target symbol is not limited to the K28.5 bit string, but can be selected by the circuit designer according to the specifications of the actual application. For example, if the input signal provided to the equalization module 12 complies with the High-Definition Multimedia Interface (HDMI) specification or the Mobile High-Definition Link (MHL) interface specification, its content does not contain a training sequence, and the symbol counting unit 14A searches for The target symbol can be a plurality of known specific control words contained in a blanking interval.

As shown in FIG. 1 , the fine-tuning module 16 also receives the returned data signal, and generates a fine-tuning control signal accordingly. After the multiplexer 18 is changed to connect the fine-tuning module 16 and the equalization module 12 by the preliminary convergence notification sent by the coarse-tuning module 14, the fine-tuning module 16 adjusts the equalization strength adopted by the equalization module 12 through the fine-tuning control signal , until the equilibrium strength satisfies a final convergence condition. FIG. 3 presents a detailed implementation example of the fine-tuning module 16 . The fine-tuning module 16 in this example includes a search unit 16A, a state judgment unit 16B and a strength adjustment unit 16C, which are described in detail as follows.

The searching unit 16A is used for searching out a plurality of data strings conforming to a target pattern from the restored data signal. For example, the target pattern may be AABA, that is, a data string whose search signal content is 1101 or 0010. Figure 4A and Figure 4B present two sample signal waveforms of data strings whose content is 0010; the solid line part represents the actual waveform, while the dotted line part represents the ideal waveform without noise interference, non-attenuation, and non-distortion. The sampling points I0-I3 roughly correspond to the center position of each data bit, and the sampling points Q0-Q2 roughly correspond to the junctions of any two data bits. In the situation shown in FIG. 4A , the sampling results of the sampling points I0 , Q0 , I1 , Q1 , I2 , Q2 , and I3 are 0, 0, 0, 0, 1, 0, and 0 in sequence. Since the sampling results of the sampling points I0-I3 are 0, 0, 1, 0, the search unit 16A can determine that there is a data string matching the target pattern. Similarly, in the situation shown in FIG. 4B , the sampling results of the sampling points I0 , Q0 , I1 , Q1 , I2 , Q2 , and I3 are 0, 0, 0, 1, 1, 1, and 0 in sequence. Since the sampling results of the sampling points I0-I3 are also 0, 0, 1, 0, the search unit 16A can also determine that there is a data string matching the target pattern.

It should be noted that the target pattern used by the search unit 16A is designed to be programmable and selectively adjusted according to the specifications of the actual application, not limited to the above-mentioned AABA.

The state judging unit 16B is responsible for judging whether each data string with the target pattern is in an over-balanced state or an under-balanced state. As far as the situation shown in FIG. 4A is concerned, since the sampling results of the sampling points Q1 and Q2 on both sides of the sampling point I2 are all 0, the state judging unit 16B can judge that this is a state of insufficient equalization intensity, so that the actual waveform is smaller than the ideal waveform, the EQ intensity should be turned up. As far as the situation shown in FIG. 4B is concerned, since the sampling results of the sampling points Q1 and Q2 on both sides of the sampling point I2 are all 1, the state judging unit 16B can judge that this is a state where the equalization intensity is too high, so that the actual waveform is greater than For an ideal waveform, the equalization intensity should be lowered. In contrast, in the above two cases, if the sampling results of the sampling points Q1 and Q2 are respectively 0 and 1, or are respectively 1 and 0, then the equalization intensity does not need to be adjusted.

Subsequently, the intensity adjustment unit 16C is responsible for selectively adjusting the equalization intensity used by the equalization module 12 according to the determination result of the state determination unit 16B. For example, the intensity adjustment unit 16C may count the number of occurrences of the over-equilibrium state and the under-equilibrium state within a certain period of time. When the number of over-balanced states minus the number of under-balanced states is higher than a difference threshold, the strength adjustment unit 16C reduces the equalization strength used by the equalization module 12 (for example, from level 16 to level 15). Conversely, when the number of under-balanced states minus the number of over-balanced states is higher than the difference threshold, the strength adjustment unit 16C increases the equalization strength used by the equalization module 12 (for example, from level 16 to level 17). If the difference between the number of over-balanced states and the number of balanced-under-balanced states is lower than the difference threshold, the strength adjustment unit 16C may determine that it is not necessary to adjust the equalization strength used by the equalization module 12 , that is, maintain the current equalization strength.

In one embodiment, after the restored data signal meets the preliminary convergence condition (that is, after the multiplexer 18 is changed to connect the fine-tuning module 16 and the equalization module 12), if the equalization strength used by the equalization module 12 is within a certain period If the temporal variability is less than a variability threshold, the fine-tuning module 16 determines that the equalization strength meets the final convergence condition. In other words, if the fine-tuning module 16 does not need to change the equalization strength used by the equalization module 12 within a certain period of time, it means that the current equalization strength has a certain degree of accuracy. The variability threshold can be selected by the circuit designer according to actual needs, and is not limited to a specific value. FIG. 4C presents an example of the relative relationship between equalization intensity and time. For example, if after a certain period of time, the variation range of the equalization strength adopted by the equalization module 12 does not exceed the preset range R _EQST , the fine-tuning module 16 can determine that the equalization strength meets the final convergence condition, and take the equalization strength within this period The average value is used as the final equilibrium strength.

FIG. 5 presents an application example of the signal receiving device 100 . In this example, the equalized signal output by the equalization module 12 is provided to a sampling module 11A. The sampling result generated by the sampling module 11A is transmitted to the digital clock data recovery module 19 . In addition to the recovered data, the digital clock data recovery module 19 also generates a clock signal, a recovered clock signal, and a phase adjustment control code according to the recovered data. After the phase adjustment module 11B adjusts the phase of the recovered clock signal according to the phase adjustment control code, it generates the sampling clock signal used by the sampling module 11A. In practice, the digital clock data recovery module 19 can generate the phase adjustment control code according to the quality of the recovered data, so as to make the sampling module 11A produce a better sampling result. It should be noted that the detailed implementation of generating the phase adjustment control code according to the returned data is known to those skilled in the art of the present invention, so details are not repeated here. As shown in FIG. 5 , the phase adjustment control code is also provided to the trimming module 16 . The fine-tuning module 16 will judge whether the phase adjustment control code has tended to be stable and will not fluctuate greatly. The intensity adjustment unit 16C in the fine adjustment module 16 does not start referring to the judgment result of the state judgment unit 16B until the phase adjustment control code indicates that the sampling clock signal output by the phase adjustment module 11B meets a phase stability condition.

The circuit architecture in FIG. 5 is suitable for systems that use digital clock data recovery to generate clock signals, such as high-definition multimedia interface (HDMI). Compared with the analog clock data recovery, the digital clock data recovery takes a longer time to lock the clock signal in a substantially correct phase, thereby providing a correct sampling clock signal. If the judgment result of the state judging unit 16B (for example, the sampling results of the sampling points I0-I3, Q0-Q2) may be deviated before the sampling clock signal is stable, it will cause the strength adjustment unit 16C to make a wrong judgment. The occurrence of related problems can be avoided by adding the above-mentioned threshold that the sampling clock signal must meet the condition of phase stability.

FIG. 6 presents another application example of the signal receiving device 100 . As mentioned earlier, the DisplayPort (DP) video interface specifies that the receiving end must complete the clock recovery process before starting the equalization process. In this example, the signal receiving device 100 cooperates with a local oscillator source 13A and a clock signal generating module 13B. The local oscillator source 13A, for example, can be an oscillator for providing a local oscillator signal. In general, the clock signal generation module 13B is used to receive an original signal and apply a clock recovery process to the original signal to generate a clock signal. In order to avoid delaying the follow-up signal processing procedure due to the clock signal generation module 13B being unable to generate a locked clock signal, if the clock signal has not entered a locked state after a period of time, the clock signal generation module 13B will be changed. It is configured as a frequency synthesizer, and instead generates a substitute clock signal according to the local oscillator signal output by the local oscillator source 13A for use by subsequent circuits (such as the signal receiving device 100 ).

FIG. 7 presents yet another application example of the signal receiving device 100 . In this example, the signal receiving device 100 cooperates with a control module 15 to assist in selecting a better transmission setting from various transmission settings. Taking the DisplayPort (DP) video interface as an example, its specification allows the transmitting end to use the training sequence as a test signal before formally sending video data, and judge which one the transmitting end should use when sending the signal based on the test results obtained by the receiving end. Which signal amplitude and which pre-emphasis degree is ideal. The cooperation between the signal receiving device 100 and the control module 15 will be described in detail below.

First, after receiving a first input signal sent by a transmission system according to the first transmission setting, the control module 15 controls the equalization module 12 to perform equalization processing on the first input signal, and the rough adjustment module 14 and the fine adjustment module 16 selectively adjusts the equalization intensity sequentially until the fine-tuning module 16 determines that the equalization intensity applied to the first input signal meets the aforementioned final convergence condition. After the fine-tuning module 16 determines that the equalization strength applied to the first input signal meets the final convergence condition, the control module 15 will record a first signal quality corresponding to the first input signal. For example, the first signal quality may be the degree of eye pattern expansion of the equalized signal when the equalization strength meeting the final convergence condition is adopted. In practice, the first signal quality can be provided to the control module 15 by the coarse adjustment module 14 or the fine adjustment module 16 , or can be generated by the control module 15 itself according to the equalized signal output by the equalization module 12 .

Next, after receiving a second input signal sent by the same transmission system according to the second transmission setting, the control module 15 controls the equalization module 12 to perform equalization processing on the second input signal, and the rough adjustment module 14 and the fine adjustment module 16 selectively adjusts the equalization strength sequentially until the fine-tuning module 16 determines that the equalization strength applied to the second input signal meets the final convergence condition. In practice, the first transmission setting and the second transmission setting may include a different pre-emphasis level and/or a different signal amplitude, but are not limited to these two settings. After the fine-tuning module 16 determines that the equalization strength applied to the second input signal meets the final convergence condition, the control module 15 will record a second signal quality corresponding to the second input signal. Then, according to the first signal quality and the second signal quality, the control module 15 will decide to suggest that the transmission system adopt the first transmission setting or the second transmission setting. Those with ordinary knowledge in the technical field of the present invention can understand that the number of transmission settings that can be tested by the signal receiving device 100 and the control module 15 is not limited to two; circuit designers can determine the number of tests according to actual needs or system specifications. .

Another embodiment of the present invention is a two-stage adaptive equalization method applied to a signal receiving device, the flow chart of which is shown in FIG. 8 . First, step S82 is to set an initial value of equalization intensity. Next, step S84 is to receive an input signal and apply an equalization process to the input signal to generate an equalized signal. Step S86 is to adjust an equalization intensity of the equalization process according to the equalized signal until the equalized signal generated by the equalization process meets a preliminary convergence condition. Subsequently, step S88 is to adjust the equalization intensity of the equalization process again according to the equalized signal after the equalized signal meets the preset condition until the equalized intensity meets a final convergence condition.

FIG. 9A presents an example of partial flow in an adaptive equalization method according to the present invention. Step S901 is to start searching and accumulating the number of target symbols in a processed signal (such as an equalized signal or a recovered data signal generated according to the equalized signal) (such as the work in charge of the symbol counting unit 14A). Step S902 is to determine whether the total number of target symbols appearing within a certain period of time is higher than a threshold value. If the judgment result of step S902 is yes, the rough adjustment procedure in the adaptive equalization method ends. Relatively, if the judgment result of step S902 is negative, then step S903 is executed to update the equalization intensity applied to the processed signal. After step S903, step S901 and subsequent steps are re-executed.

FIG. 9B shows another partial flow example of an adaptive equalization method according to the present invention. Step S911 may be performed after the rough adjustment procedure is completed. Step S911 is to determine whether the electronic system adopting this process operates under the digital clock data recovery framework (such as a high-resolution multimedia interface). If the determination result of step S911 is yes, then step S912 is executed, that is, waiting for a sampling clock signal to meet a phase stability condition (for example, waiting for the phase adjustment control code in FIG. 5 to become stable). If the judgment result of step S911 is negative, or after step S912 is completed, step S913 is executed, that is, in a processed signal (such as an equalized signal or a restored data signal generated according to the equalized signal) Search for data strings with the target pattern, and determine whether each data string with the target pattern is in an over-balanced state or an under-balanced state (for example, the work that the search unit 16A and the state judgment unit 16B are responsible for). Step S914 is to respectively accumulate the number of over-balanced states and the number of under-balanced states within a certain period of time. Step S915 is to determine whether the number of over-balanced states minus the number of under-balanced states is higher than a difference threshold. If the determination result of step S915 is yes, step S916 is executed, that is, the equalization strength applied to the processed signal is reduced, and the process returns to step S913. If the result of step S915 is negative, then step S917 is executed to determine whether the number of under-balanced states minus the number of over-balanced states is higher than the difference threshold. If the determination result of step S917 is yes, then step S918 is executed, that is, the equalization intensity applied to the processed signal is increased, and the process returns to step S913. If the determination result of step S917 is negative, then step S919 is executed to determine whether the equalization strength meets a final convergence condition. If the determination result of step S919 is negative, the process returns to step S913. If the determination result of step S919 is yes, then step S920 is executed, that is, to determine a final equalization strength (for example, the average value of the equalization strength within the period meeting the final convergence condition). So far, the fine-tuning program ends.

Those of ordinary skill in the technical field of the present invention can understand that the various operational changes described above when introducing the signal receiving device 100 can also be applied to the two-stage adaptive equalization method in the processes of FIG. 8 , FIG. 9A , and FIG. 9B . Its details will not be repeated.

As mentioned above, the present invention proposes a new signal receiving device and its two-stage adaptive equalization method. In an embodiment according to the present invention, the process of selecting the equalization strength is divided into two stages, coarse tuning and fine tuning, and each of the two stages has different convergence conditions. In addition to adaptively adjusting the equalization strength according to the input signal, the signal receiving device and equalization method according to the present invention can also ensure that the finally selected equalization strength converges within the correct range through the inspection of two adjustment stages.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be defined by the claims.

Claims (15)

1. a kind of signal receiving device, comprising：

One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with Produce a signal after equalization；

One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium Signal meets a preliminary condition of convergence afterwards；The coarse adjustment module includes：One symbol count unit, to search in the signal after equalization Multiple aiming symbols, and add up the plurality of aiming symbol total quantity；The preliminary condition of convergence, which includes, judges that the total quantity is It is no to be higher than a quantity threshold value；It is the plurality of when the input signal meets a display port (DisplayPort, DP) interface specification Aiming symbol is the multiple K28.5 Bit Strings being contained in a training sequence (training sequence), or when the input is believed Number meet a high-resolution multimedia interface (high definition multimedia interface, HDMI) specification or one Mobile high-res link (mobile high-definition link, MHL) interface specification, and the plurality of aiming symbol is bag The multiple specific control words (control word) being contained in a masking section (blanking interval)；

One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence.

2. signal receiving device as claimed in claim 1, is also included：

A period of time arteries and veins data recovery module, after the signal after equalization is carried out into clock pulse data recovery processing, then provide thick to this One of mode transfer block and the fine setting module.

3. signal receiving device as claimed in claim 1, it is characterised in that the coarse adjustment module includes：

One eye Diagram Analysis unit, to produce an eye pattern of the signal after equalization (eye diagram), and judge the one of the eye pattern Expansion degree；Whether the preliminary condition of convergence includes judges the expansion degree higher than an expansion degree threshold value.

4. a kind of signal receiving device, comprising：

One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with Produce a signal after equalization；

One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium Signal meets a preliminary condition of convergence afterwards；And

One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；Wherein this is micro- Mode transfer block includes：

One searches unit, to search the more pen data strings for meeting a target pattern in the signal after equalization；

One condition adjudgement unit, to judge more pen data strings whether in an overbalance state or a balanced deficiency respectively State；And

One intensity adjustment unit, to the judged result according to the condition adjudgement unit, optionally adjusts the equilibrium treatment The high isostatic strength.

5. signal receiving device as claimed in claim 4, is further included：

One sampling module, to be sampled the signal after equalization according to a sampling clock signal, to produce a sampling result；

One digital clock pulse data recovery module, to according to the sampling result produce one reply after data-signal, one reply after when Arteries and veins signal and a phase adjustment control code, wherein data-signal is the signal after equalization after the reply；And

One phase adjusting module, to adjust the phase of clock signal after the reply according to the phase adjustment control code, to produce The sampling clock signal；

Wherein until the phase adjustment control code points out that the sampling clock signal has met a phase stabilization condition, intensity adjustment Unit is just referring initially to the judged result of the condition adjudgement unit.

6. signal receiving device as claimed in claim 4, it is characterised in that treat that the signal after equalization meets the preliminary convergence bar After part, if the high isostatic strength is less than a variability threshold value in the variability in one section of special time, the fine setting module judges should High isostatic strength meets the final condition of convergence.

7. a kind of signal receiving device, comprising：

One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with Produce a signal after equalization；

One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium Signal meets a preliminary condition of convergence afterwards；

One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；

One local oscillations source, to provide a local oscillated signal；And

One clock pulse signal generator module, to receive a primary signal, and a clock pulse is imposed to the primary signal and replys program, with Produce a clock signal；If the clock signal, through being still introduced into a lock-out state after a period of time, the clock signal produces mould Block is configured as a frequency synthesizer, and is changed to produce one according to the local oscillated signal and is substituted clock signal.

8. a kind of signal receiving device, comprising：

One balance module, to receive an input signal, and equilibrium treatment is imposed to the input signal according to a high isostatic strength, with Produce a signal after equalization；

One coarse adjustment module, is coupled to the balance module, to adjust the high isostatic strength according to the signal after equalization, until the equilibrium Signal meets a preliminary condition of convergence afterwards；

One fine setting module, is coupled to the balance module, to after the signal after equalization meets the preliminary condition of convergence, the fine setting Module adjusts the high isostatic strength according to the signal after equalization, until the high isostatic strength meets a final condition of convergence；

One control module, to produce multiple signal qualities, multiple different transmission settings are respectively corresponding to, and according to the plurality of letter Number quality determines the transmission setting of a transmission system；

The plurality of signal quality of each of which is that to control the balance module for an input signal to carry out this by the control module equal Weighing apparatus processing, the high isostatic strength that the input signal is imposed on until fine setting module judgement meets the final condition of convergence, and records It is corresponding to a transmission setting corresponding to a signal quality of the input signal；Transmission setting is strengthened in advance comprising different one (pre-emphasis) degree and/or a different signal amplitudes.

9. a kind of two benches adaptive equalization method of signal receiving device, comprising：

(a) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is balanced to produce one Signal afterwards；

(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；Wherein Step (b) includes：Multiple aiming symbols in the signal after equalization are searched, and calculate the total quantity of the plurality of aiming symbol；Should The preliminary condition of convergence, which includes, judges whether the total quantity is higher than a quantity threshold value；When the input signal meets a display port (DP) interface specification, and the plurality of aiming symbol is multiple K28.5 Bit Strings for being contained in a training sequence or when the input Signal meets high-resolution multimedia interface (HDMI) specification or a movement high-res link (MHL) interface specification, and this is more Individual aiming symbol is the multiple specific control words being contained in a masking section；

(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength, Until the high isostatic strength meets a final condition of convergence.

10. two benches adaptive equalization method as claimed in claim 9, it is characterised in that when the signal after equalization is subjected to After the processing of arteries and veins data recovery, then it is used for step (b) and step (c).

11. two benches adaptive equalization method as claimed in claim 9, it is characterised in that step (b) includes：

An eye pattern of the signal after equalization is produced, and judges an expansion degree of the eye pattern；The preliminary condition of convergence, which includes, to be judged Whether the expansion degree is higher than an expansion degree threshold value.

12. a kind of two benches adaptive equalization method of signal receiving device, comprising：

(a) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is balanced to produce one Signal afterwards；

(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；And

(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength, Until the high isostatic strength meets a final condition of convergence；Wherein step (c) includes：

(c1) the more pen data strings for meeting a target pattern are searched in the signal after equalization；

(c2) judge more pen data strings whether in an overbalance state or a balanced insufficient state respectively；And

(c3) according to step (c2) judged result, the high isostatic strength of the equilibrium treatment is optionally adjusted.

13. two benches adaptive equalization method as claimed in claim 12, is further included：

The signal after equalization is sampled according to a sampling clock signal, to produce a sampling result；

Clock signal and a phase adjustment control code after data-signal, one reply after being replied according to sampling result generation one, its In after the reply data-signal be the signal after equalization；

The phase of clock signal after the reply is adjusted according to the phase adjustment control code, to produce the sampling clock signal；And

After the phase adjustment control code points out that the sampling clock signal has met a phase stabilization condition, just start to perform step Suddenly (c3).

14. two benches adaptive equalization method as claimed in claim 12, it is characterised in that step (c) includes：

After signal meets the preliminary condition of convergence after the processing, if the high isostatic strength is small in the variability in one section of special time In a variability threshold value, judge that the high isostatic strength meets the final condition of convergence.

15. a kind of two benches adaptive equalization method of signal receiving device, comprising：

(a1) local oscillated signal is provided；

(a2) primary signal is received, and a clock pulse is imposed to the primary signal and replys program, to produce a clock signal；And

If the clock signal is changed to impose the local oscillated signal one frequency through being still introduced into a lock-out state after a period of time Rate synthesis program, clock signal is substituted to produce one；

(a3) input signal is received, and an equilibrium treatment is imposed to the input signal according to a high isostatic strength, it is equal to produce one Signal after weighing apparatus；

(b) according to the signal after equalization coarse adjustment high isostatic strength, until the signal after equalization meets a preliminary condition of convergence；And

(c) after the signal after equalization meets the preliminary condition of convergence, again according to the signal after equalization fine tuning high isostatic strength, Until the high isostatic strength meets a final condition of convergence.