CN103929549B - The abnormality determination method of the quick idle mode of hand-free circuit - Google Patents
The abnormality determination method of the quick idle mode of hand-free circuit Download PDFInfo
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- CN103929549B CN103929549B CN201410168243.6A CN201410168243A CN103929549B CN 103929549 B CN103929549 B CN 103929549B CN 201410168243 A CN201410168243 A CN 201410168243A CN 103929549 B CN103929549 B CN 103929549B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 23
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- 101100524677 Arabidopsis thaliana RHM1 gene Proteins 0.000 description 4
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Abstract
The invention provides the abnormality determination method of the quick idle mode of a kind of hand-free circuit, comprise the steps: S1. Mike's end input sine wave signal at described hand-free circuit, the outfan of the outfan of near-end/far-end level detector and transmission/reception background noise detector is respectively connecting to the external level of correspondence; S2. by changing described external level so that described hand-free circuit is transformed into quick idle mode from sending mode, records the first conversion time TF; S3. by changing described external level so that described hand-free circuit is transformed into idle mode at a slow speed from sending mode, records the second conversion time TS; S4. the described first and second conversion times are compared, if TS��6TF, then judge that quick idle mode is normal, otherwise judge that quick idle mode is abnormal. The method test process is controlled, and can be greatly promoted testing efficiency, due to test error that peripheral circuit difference causes when can be effectively prevented from testing simultaneously.
Description
Technical field
The present invention relates to integrated circuit fields, particularly to the abnormality determination method of the quick idle mode of a kind of hand-free circuit.
Background technology
Private branch exchange system (PBX), i.e. group telephone, it is widely deployed in enterprise's office facility, what drastically increase enterprise does work efficiency rate. Wherein high-quality hand-free circuit is the important component part of PBX. Hand-free circuit is generally provided by universal hands free call chip, mainly has BL34018 (compatible MC34018), BL34118 (compatible MC34118) etc.
Hand-free circuit adopts either simplex talking mode: when sending words, connects and send words loop, and listening circuit disconnects, and speaker is sounding not; Time called, speaker sounding, telecommunication circuit disconnects. The conversion of both talking states is without being manually operated, but by hand-free circuit according to sending words and the power of accepted call signal to automatically control: when telecommunication signal is stronger than accepted call signal, is in and send speech phase; Otherwise, when accepted call signal is stronger than telecommunication signal, it is in by speech phase. It is entirely conversion automatically with reception two states owing to sending, therefore also referred to as half-duplex call.
The hand-free circuit BL34018 (compatible MC34018) of early stage, its mode of operation only sends, receives and idle (SlowIdle) three kinds at a slow speed. The far-end speech signal that outside line is sent here is after integrated circuit peripheral amplifier amplifies, being divided into two-way to send into chip, a road is enter into the input of receiving attenuation device, during attenuator conducting, signal is transported to loudspeaker power amplifier and amplifies, and drives Near end speaker sounding; Another road is input to incoming level detector, and called AC signal is converted to corresponding DC level, and this level is input to transmission/reception comparator and compares with the level sending signal. When sending signal level and being higher than incoming level, sending/receive comparator output high level to attenuation controller, so as to be in transmission controlled state, the gain controlling to send attenuator is maximum, receiving attenuation device is in maximum attenuation state, and chip is in and unidirectional send speech phase.Otherwise, when received signal level is higher than transmission level, comparator output low level is to attenuation controller, so as to be in reception controlled state, the gain controlling receiving attenuation device is maximum, sends attenuator and is in maximum attenuation state, and chip is in unidirectional by speech phase.
Therefore, if far-end caller is speaking, then received signal level, more than sending signal level, sends attenuator and is in maximum attenuation state, and receiving attenuation device is in maximum gain, and system is in reception state; Otherwise, when the caller of near-end speaks, sending attenuator and be in maximum gain, receiving attenuation device is in maximum attenuation state, and system is in transmission state.
So generate the problem that, due to send and received signal level be relatively sending after attenuator, when sending attenuator and being in maximum attenuation state, the caller of near-end is difficult to interrupt the talk of far-end caller. Even if having of short duration pause in far-end caller's speech, the caller of near-end also is difficult to chip in into, it is easy to produce the loss of near-end voice signals.
So, high-quality voice call circuit adds a kind of quickly idle (FastIdle) pattern, to realize quickly to switch between reception and transmission state. Chip BL34118 (compatible MC34118) just possesses quick idle mode, it is possible to avoid the appearance of the problems referred to above.
The implementation of quick idle mode is, chip is provided with level detector at far-end (near phone line end) and near-end (near Mike and speaker end) respectively, is respectively intended to detection and compares the transmission incoming level sending incoming level and near-end of far-end. When sending, received signal level is close, when being in race condition, two comparators obtain inconsistent result, system is put into quick idle mode, make to send receiving attenuation device and be in maximum attenuation state, until the side sending signal or reception signal is in clear superiority, just exits competition, namely exit quick idle mode.
Thing followed problem is, when quick idle mode is carried out unusual determination, owing to the peripheral circuit of hand-free circuit would be likely to occur difference, therefore it is difficult to determine that the threshold value sent with received signal level is to judge whether voice call circuit can enter quick mode in different application systems; Simultaneously as hand-free circuit has noise measuring function, test must adopt voice signal as sending and receiving signal. These factors bring difficulty to the unusual determination of quick idle mode.
Summary of the invention
In order to accurately and effectively quick mode be carried out unusual determination, the present invention proposes the abnormality determination method of the quick idle mode of a kind of hand-free circuit, comprise the steps: S1. Mike's end input sine wave signal at described hand-free circuit, the outfan of the outfan of near-end/far-end level detector and transmission/reception background noise detector is respectively connecting to the external level of correspondence; S2. by changing described external level so that described hand-free circuit is transformed into quick idle mode from sending mode, records the first conversion time TF; S3. by changing described external level so that described hand-free circuit is transformed into idle mode at a slow speed from sending mode, records the second conversion time TS; S4. the described first and second conversion times are compared, if TS��6TF, then judge that quick idle mode is normal, otherwise judge that quick idle mode is abnormal.
Specifically, step S2 specifically includes: the external level that S2-1. setting is connected with the reception detection outfan of described near-end level detector is low level, the external level being connected with the transmission detection outfan of described near-end level detector is high level, the external level being connected with the reception detection outfan of described far-end level detector is low level, the external level being connected with the transmission detection outfan of described far-end level detector is high level, the external level being connected with the outfan of described transmission background noise detector is low level, the external level being connected with the outfan of described reception background noise detector is high level, so that described hand-free circuit is in sending mode,S2-2. by with described far-end level detector receive the detection external level transitions that is connected of outfan be high level with described far-end level detector send that to detect the external level transitions that outfan is connected be low level, so that described hand-free circuit is converted to quick idle mode, and record the first conversion time TF��
Specifically, step S3 specifically includes: the external level that S3-1. setting is connected with the reception detection outfan of described near-end level detector is low level, the external level being connected with the transmission detection outfan of described near-end level detector is high level, the external level being connected with the reception detection outfan of described far-end level detector is low level, the external level being connected with the transmission detection outfan of described far-end level detector is high level, the external level being connected with the outfan of described transmission background noise detector is low level, the external level being connected with the outfan of described reception background noise detector is high level, so that described hand-free circuit is in sending mode, S3-2. it is high level by the external level transitions that is connected with the outfan of described transmission background noise detector, so that described hand-free circuit is converted to idle mode at a slow speed, and records the second conversion time TS��
Preferably, the frequency of described sine wave signal is 1KHz.
Preferably, described hand-free circuit adopts universal hands free call chip BL34118 or MC34118 to realize.
In the step of above-mentioned abnormality determination method, the order of step S2 and S3 can be interchangeable, and namely can first record the first conversion time TFRecord the second conversion time T againS, it is also possible to first record the second conversion time TSRecord the first conversion time T againF��
The abnormality determination method of the quick idle mode of the hand-free circuit of the present invention, the height of corresponding module outfan level in initialization circuit is forced by external level, circuit is made to enter different mode to detect the time of its patten transformation by testing procedure, thus judging the whether normal of quick idle mode. So, it is possible to make unusual determination process not by background noise and the impact sending and receiving signal amplitude so that test process is controlled, and can be greatly promoted testing efficiency. Simultaneously, present invention sine wave signal replaces actual speech signal to test as input signal, determine due to sinusoidal wave amplitude and be periodically continual, therefore compared to input actual speech signal, the effect of repeatable test can be reached, the test error owing to the individual difference of voice signal causes can be effectively prevented from simultaneously.
Accompanying drawing explanation
Fig. 1 is the preferred embodiment schematic diagram of the abnormality determination method of the quick idle mode of the hand-free circuit of the present invention;
Fig. 2 is the schematic flow sheet of the abnormality determination method of the quick idle mode of the hand-free circuit of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the abnormality determination method of the quick idle mode of the hand-free circuit of the present invention is described in further detail, but not as a limitation of the invention.
In the preferred embodiment of the present invention, as it is shown in figure 1, universal hands free call chip BL34118 (MC34118) includes sending background noise detector, receiving background noise detector, near-end level detector and far-end level detector.
Wherein, the outfan sending background noise detector is expressed as CPT, and the outfan receiving background noise detector is expressed as CPR.The value of CPT or CPR, represents non-noise when being 0, represents noise when being 1. The transmission detection outfan of near-end level detector is labeled as TOL2, the reception detection outfan of near-end level detector is labeled as ROL2, the transmission detection outfan of far-end level detector is labeled as TOL1, and the reception detection outfan of far-end level detector is labeled as ROL1.
In chip BL34118 (MC34118), quick idle mode is realized by attenuation controller. Logical process function in attenuator controller is completed by integrated injection logic (I2L) module, and this module has four inputs signal C1, C2, C3 and C4, and the description of four input signals is in Table 1.
Table 1I2L module input signal description
I2L module, according to the value inputting signal C1, C2, C3 and C4, determines the mode of operation of hand-free circuit according to the rule of table 2.
Table 2 mode of operation is established rules then really
| C1 | C2 | C3 | C4 | Mode of operation |
| 0 | 0 | 0 | 0 | Leave unused at a slow speed |
| 0 | 0 | 0 | 1 | Receive |
| 0 | 0 | 1 | 0 | Leave unused at a slow speed |
| 0 | 0 | 1 | 1 | Receive |
| 0 | 1 | 0 | 0 | Leave unused at a slow speed |
| 0 | 1 | 0 | 1 | Quickly idle |
| 0 | 1 | 1 | 0 | Quickly idle |
| 0 | 1 | 1 | 1 | Quickly idle |
| 1 | 0 | 0 | 0 | Leave unused at a slow speed |
| 1 | 0 | 0 | 1 | Quickly idle |
| 1 | 0 | 1 | 0 | Quickly idle |
| 1 | 0 | 1 | 1 | Quickly idle |
| 1 | 1 | 0 | 0 | Leave unused at a slow speed |
| 1 | 1 | 0 | 1 | Leave unused at a slow speed |
| 1 | 1 | 1 | 0 | Send |
| 1 | 1 | 1 | 1 | Send |
Visible, when sending signal and receiving signal and be not all noise, and when comparator results proximally and distally is inconsistent, quick idle mode will be entered.
Really establish rules then based on the mode of operation listed by table 2, the present invention propose a kind of by external level force draw high or drag down the outfan of corresponding module in circuit, thus arranging the value of the input signal C1 of I2L module, C2, C3 and C4 artificially, make circuit enter, according to testing procedure, the different mode specified and detect the time of its patten transformation, thus judging the abnormality determination method that whether normal quick idle mode is.
In a preferred embodiment, as in figure 2 it is shown, the abnormality determination method of the quick idle mode of the present invention comprises the steps:
S1. as it is shown in figure 1, the outfan of the near-end of hand-free circuit/far-end level detector and the outfan of transmission/reception background noise detector are connected to external level, meanwhile, the Mike's end incoming frequency at hand-free circuit is the sine wave signal of 1KHz.
S2. arrange that ROL2 is connected to low level, TOL2 is connected to high level, ROL1 is connected to low level, TOL1 is connected to high level, CPT is connected to low level, CPR is connected to high level. Description according to table 1, under the setting of this external level, the input signal C1/C2/C3/C4 of I2L module is 1/1/1/0, the description according to table 2, and now hand-free circuit is in sending mode, measures the transmission signal gain on line maximum. After hand-free circuit is stable at sending mode, being drawn high by ROL1, TOL1 drags down, so that C1/C2/C3/C4 is 1/0/1/0, sends signal and be in attenuation state, hand-free circuit is converted to quick idle mode. Record circuit from sending mode to the time of changing of quick idle mode be the first conversion time TF��
S3. dragged down by ROL1, TOL1 draws high so that C1/C2/C3/C4 becomes 1/1/1/0 again, namely makes hand-free circuit again be in sending mode. After hand-free circuit is stable at sending mode, CPT is drawn high, so that C1/C2/C3/C4 is 1/1/0/0, hand-free circuit is converted to idle mode at a slow speed, record circuit from sending mode to the time of changing of idle mode at a slow speed be the second conversion time TS��
S4. compared for the first and second conversion times, if TS��6TF, then judge that quick idle mode is normal, otherwise, it is determined that quickly idle mode is abnormal.
Obviously, because the method for the present invention is intended to be arranged external level by pressure and made circuit change between different working modes, thus testing its conversion time. Therefore, in the step of above-mentioned abnormality determination method, the order of step S2 and S3 can be exchanged, and namely can first record the first conversion time T completely as described aboveFRecord the second conversion time T againS, can also first record the second conversion time T equallySRecord the first conversion time T againF. Therefore, both technical schemes each fall within protection scope of the present invention.
Above detailed description of the invention is only the illustrative embodiments of the present invention, it is impossible to being used for limiting the present invention, protection scope of the present invention is defined by the claims. The present invention in the essence of the present invention and protection domain, can be made various amendment or equivalent replacement by those skilled in the art, and these are revised or be equal to replacement and also should be regarded as being within the scope of the present invention.
Claims (3)
1. an abnormality determination method for the quick idle mode of hand-free circuit, comprises the steps:
S1. at Mike's end input sine wave signal of described hand-free circuit, the outfan of the outfan of near-end/far-end level detector and transmission/reception background noise detector is respectively connecting to the external level of correspondence;
S2. by changing described external level so that described hand-free circuit is transformed into quick idle mode from sending mode, records the first conversion time TF;
S3. by changing described external level so that described hand-free circuit is transformed into idle mode at a slow speed from sending mode, records the second conversion time TS;
S4. the described first and second conversion times are compared, if TS��6TF, then judge that quick idle mode is normal, otherwise judge that quick idle mode is abnormal,
Wherein, step S2 specifically includes:
S2-1. the external level that setting is connected with the reception detection outfan of described near-end level detector is low level, the external level being connected with the transmission detection outfan of described near-end level detector is high level, the external level being connected with the reception detection outfan of described far-end level detector is low level, the external level being connected with the transmission detection outfan of described far-end level detector is high level, the external level being connected with the outfan of described transmission background noise detector is low level, the external level being connected with the outfan of described reception background noise detector is high level, so that described hand-free circuit is in sending mode,
S2-2. by with described far-end level detector receive the detection external level transitions that is connected of outfan be high level with described far-end level detector send that to detect the external level transitions that outfan is connected be low level, so that described hand-free circuit is converted to quick idle mode, and record the first conversion time TF,
Wherein, step S3 specifically includes:
S3-1. the external level that setting is connected with the reception detection outfan of described near-end level detector is low level, the external level being connected with the transmission detection outfan of described near-end level detector is high level, the external level being connected with the reception detection outfan of described far-end level detector is low level, the external level being connected with the transmission detection outfan of described far-end level detector is high level, the external level being connected with the outfan of described transmission background noise detector is low level, the external level being connected with the outfan of described reception background noise detector is high level, so that described hand-free circuit is in sending mode,
S3-2. it is high level by the external level transitions that is connected with the outfan of described transmission background noise detector, so that described hand-free circuit is converted to idle mode at a slow speed, and records the second conversion time TS��
2. the abnormality determination method of the quick idle mode of hand-free circuit according to claim 1, it is characterised in that the frequency of described sine wave signal is 1KHz.
3. the abnormality determination method of the quick idle mode of hand-free circuit according to claim 1, it is characterised in that described hand-free circuit adopts universal hands free call chip BL34118 or MC34118 to realize.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5768364A (en) * | 1995-05-31 | 1998-06-16 | Casio Phonemate, Inc. | Software speakerphone system and method of operating a speakerphone |
| CN101500112A (en) * | 2008-01-31 | 2009-08-05 | 日本电气株式会社 | Automatic switch apparatus and method |
| CN101741409A (en) * | 2008-11-11 | 2010-06-16 | 博通集成电路（上海）有限公司 | Two-way communication equipment |
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2014
- 2014-04-24 CN CN201410168243.6A patent/CN103929549B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5768364A (en) * | 1995-05-31 | 1998-06-16 | Casio Phonemate, Inc. | Software speakerphone system and method of operating a speakerphone |
| CN101500112A (en) * | 2008-01-31 | 2009-08-05 | 日本电气株式会社 | Automatic switch apparatus and method |
| CN101741409A (en) * | 2008-11-11 | 2010-06-16 | 博通集成电路（上海）有限公司 | Two-way communication equipment |
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