CN111432092B - Video transmission method and device - Google Patents
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- H04N5/14—Picture signal circuitry for video frequency region
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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Abstract
The application provides a video transmission method and a device thereof. The video transmission method comprises the following steps: receiving a video source signal, and acquiring a video data valid indication signal according to the video source signal; counting a line count of vertical signals in the video data valid indication signal; when the line count value of the vertical signal is greater than a second preset value K, generating a flag bit signal of the vertical signal for marking the end of video transmission; and when the numerical value of the line count of the vertical signal is less than or equal to a second preset value K, continuing to count the line count of the vertical signal until the numerical value of the line count of the vertical signal is greater than the second preset value K. According to the method and the device, the line count of the vertical signals is counted to generate the flag bit signal of the vertical signal for marking the end of transmission of one section of video, so that the bit width of the adder required for judging whether the transmission of the one section of video is ended is reduced, and the waste of hardware resources is avoided.
Description
Technical Field
The present application relates to the field of display, and in particular, to a video transmission method and apparatus.
Background
With the improvement of the degree of informatization, people have various information acquisition modes, and the acquisition of information through videos is one of important modes.
The existing video transmission mode generally adopts the mode that the low level in the video data effective indication signal is simply counted to judge whether the transmission of a section of video in the video transmission is finished, and the problem that the bit width of an adder is too large to cause waste of hardware resources exists.
Therefore, a new video transmission method and apparatus are needed to solve the above-mentioned problems.
Disclosure of Invention
The application provides a video transmission method and a video transmission device, which are used for solving the problem of hardware resource waste caused by the fact that whether one section of video transmission is finished or not is judged only by simple counting of low level in a video data effective indication signal in the existing video transmission method.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
the application provides a video transmission method, which comprises the following steps:
receiving a video source signal, and acquiring a video data valid indication signal according to the video source signal;
counting a line count of a vertical signal in the video data valid indication signal;
when the line count value of the vertical signal is greater than a second preset value K, generating a flag bit signal of the vertical signal for marking the end of video transmission; when the line count value of the vertical signal is smaller than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is larger than the second preset value K.
In the video transmission method provided by the present application, the step of receiving a video source signal and obtaining a video data valid indication signal according to the video source signal includes:
receiving the video source signal;
acquiring a video data valid indication signal according to the video source signal;
wherein the video data valid indication signal includes X high level signals, Y low level signals, and Z vertical signals, X, Y, Z is an integer greater than or equal to 0.
In the video transmission method provided by the present application, the step of counting the line count of the vertical signal in the video data valid indication signal includes:
counting line counts of the low level signal and the vertical signal in the video data valid indication signal;
acquiring line count values of the low level signal and the vertical signal;
when the count value of the low-level signal is equal to a first preset value N, adding one to the line count value of the vertical signal, and clearing the low-level count;
when the counting value of the low-level signal is not equal to a first preset value N, continuing to count the low-level signal in the video data effective indication signal;
wherein, the value of the first preset value N is N-2 n -1, n being an integer greater than or equal to 0.
In the video transmission method provided by the application, a relational expression between the first preset value N and the total number Y of the low level signals is N × L less than N (L + 1);
wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1;
the first preset value N is the total number of the low levels in each counting cycle period;
the value of the second preset value K is a positive number which is less than or equal to the value of the counting cycle period.
In the video transmission method provided by the present application, the step of counting the line counts of the low level signal and the vertical signal in the video data valid indication signal includes:
counting the line counts of the low level signal and the vertical signal in the video data valid indication signal for the mth time;
when the video data effective indication signal which is counted for the Mth time is the low level signal, counting the low level signal for the M +1 th time;
when the video data effective indication signal which is counted for the Mth time is not the low level signal, clearing the count value of the low level signal counted for the Mth time and the line count value of the vertical signal;
where M is a positive integer less than the value of the count cycle period.
The application also provides a video transmission device which comprises an acquisition module, a counting module and a judgment module;
the acquisition module is used for receiving a video source signal and acquiring a video data effective indication signal according to the video source signal;
the counting module is used for counting the line count of the vertical signals in the video data effective indication signals;
the judging module is used for generating a flag bit signal of the vertical signal for marking the end of video transmission when the line count value of the vertical signal is greater than a second preset value K; when the line count value of the vertical signal is smaller than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is larger than the second preset value K.
In the video transmission device provided by the application, the acquisition module comprises a receiving unit and a first acquisition unit;
the receiving unit is used for receiving the video source signals;
the first acquisition unit is used for acquiring a video data valid indication signal according to the video source signal;
wherein the video data valid indication signal includes X high level signals, Y low level signals, and Z vertical signals, X, Y, Z is an integer greater than or equal to 0.
In the video transmission device provided by the application, the counting module comprises a counting unit, a second obtaining unit and a first judging unit;
the counting unit is used for counting the line counts of the low-level signals and the vertical signals in the video data effective indication signals;
the second acquiring unit is used for acquiring the line count values of the low-level signal and the vertical signal;
the first judging unit is used for adding one to the line counting value of the vertical signal when the counting value of the low-level signal is equal to a first preset value N, and clearing the low-level counting; when the counting value of the low-level signal is not equal to a first preset value N, continuing to count the low-level signal in the video data effective indication signal;
wherein, the value of the first preset value N is N-2 n -1, n is an integer greater than or equal to 0.
In the video transmission apparatus provided in the present application, a relation between the first preset value N and the total number Y of the low level signals is N × L ≦ N (L + 1);
wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1;
the first preset value N is the total number of the low levels in each counting cycle period;
the value of the second preset value K is a positive number which is less than or equal to the value of the counting cycle period.
In the video transmission device provided by the application, the counting unit comprises a first counting subunit, a second counting subunit and a low-level signal judging subunit;
the first counting subunit is configured to count the line counts of the low-level signal and the vertical signal in the video data valid indication signal for an mth time;
the second counting subunit is configured to count the low level signal for an M +1 th time when the video data valid indication signal that is counted for the M th time is the low level signal;
the low level signal judgment subunit is configured to zero-clear a count value of the low level signal counted for the mth time and a row count value of the vertical signal when the video data valid indication signal counted for the mth time is not the low level signal;
where M is a positive integer less than the value of the count cycle period.
Has the advantages that: according to the method and the device, the line count of the vertical signals is counted to generate the flag bit signal of the vertical signal for marking the end of transmission of one section of video, so that the bit width of the adder required for judging whether the transmission of the one section of video is ended is reduced, and the waste of hardware resources is avoided.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a video transmission method according to the present application.
Fig. 2 is a schematic diagram of a first structure of a video transmission apparatus according to the present application.
Fig. 3 is a second structural diagram of the video transmission apparatus according to the present application.
Fig. 4 is a schematic structural diagram of a counting module of the video transmission device of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the existing video transmission process, the bit width of an adder required for judging whether one section of video transmission is finished is too large, and the problem of hardware resource waste exists. Based on this, the application provides a video transmission method and a device thereof.
Referring to fig. 1, the video transmission method includes:
and S1, receiving a video source signal, and acquiring a video data valid indication signal according to the video source signal.
In this embodiment, step S10 specifically includes:
and S11, receiving the video source signal.
And S12, acquiring a video data valid indication signal according to the video source signal.
In this step, the video data valid indication signal includes X high level signals, Y low level signals and Z vertical signals, and X, Y, Z is an integer greater than or equal to 0.
In this step, the low level signal may appear continuously.
And S2, counting the line count of the vertical signal in the video data effective indication signal.
In this embodiment, step S20 specifically includes:
s21, counting the line count of the low level signal and the vertical signal in the video data valid indication signal.
In this embodiment, step S21 specifically includes:
s211, counting the line counts of the low level signal and the vertical signal in the video data valid indication signal for the mth time.
S212, when the video data valid indication signal counted M times is the low level signal, counting M +1 times for the low level signal.
S213, when the video data valid indication signal counted M times is not the low level signal, clearing the count value of the low level signal counted M times and the line count value of the vertical signal.
Where M is a positive integer less than the value of the count cycle period.
For example, when the number of counting cycle periods is 10, M may take a value of 3. When the video data effective indication signal which is counted for the 3 rd time is the low level signal, and the line count of the vertical signal is 3 at the moment, counting for the 4 th time is carried out on the low level signal; when the video data valid indication signal for counting 3 rd time is not the low level signal, the count value of the low level signal and the line count value of the vertical signal for counting 3 rd time are cleared, at this time, the line count of the vertical signal becomes 0, and the next counting of the low level signal is started.
And S22, acquiring the line counting values of the low-level signal and the vertical signal.
And S23, when the count value of the low-level signal is equal to a first preset value N, adding one to the line count value of the vertical signal, and clearing the low-level count.
In this embodiment, the initial value of the line count of the vertical signal may be 0.
For example, when the count value of the low-level signal reaches a first preset value N for the first time, the line count value of the vertical signal is 1, the value of the low-level signal counted in the first counting cycle is cleared, the second counting cycle is started, and the low-level signal is counted; and when the count value of the low-level signal reaches a first preset value N for the second time, the line count value of the vertical signal is changed into 2 after being added with one, the value of the low-level signal counted in the second counting cycle period is cleared, the third counting cycle period is started, the low-level signal is counted, and the steps are repeated.
And S24, when the count value of the low-level signals is not equal to the first preset value N, continuing to count the low-level signals in the video data effective indication signals.
Wherein, the value of the first preset value N is N-2 n -1, n being an integer greater than or equal to 0.
For example, when N is 10, the value of the first preset value N is 1023.
In this embodiment, a relation between the first preset value N and the total number Y of the low level signals is N × L ≦ N × N (L + 1).
Wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1.
The first preset value N is the total number of the low levels in each counting cycle period.
For example, when the total number Y of the low-level signals is 10230, if the value of the first preset value N is 1023, the value of the counting cycle period is 10; or, when the total number Y of the low level signals is 10240, if the value of the first preset value N is 1023, the value of the counting cycle period is still 10.
When the relation between the first preset value N and the total number Y of the low level signals is Y ═ N × L or the total number Y of the low level signals is greater than N × L but less than N × L (L +1), the low level signals in the video data effective indication signal are grouped into a group of N, and the low level signals are continuously counted for L times in a cycle in total, so that the bit width of the adder originally required by counting Y times through simple low levels is reduced to one L times, and hardware resources required for outputting the flag bit signal of the vertical signal are saved.
And S3, when the line count value of the vertical signal is greater than a second preset value K, generating a flag bit signal of the vertical signal for marking the end of video transmission.
And S4, when the line count value of the vertical signal is less than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is greater than the second preset value K.
In this embodiment, the value of the second preset value K is a positive number less than or equal to the value of the counting cycle period.
For example, when the value of the counting cycle period is 10, the value of the second preset value K may be 8, and may also be 8.5. When the second preset value K is 8, if the line count value of the vertical signal is 6, continuing to count the line count of the vertical signal until the line count value of the vertical signal is 9, and generating a flag bit signal of the vertical signal for marking the end of video transmission.
According to the method and the device, the line count of the vertical signals is counted to generate the flag bit signals of the vertical signals for marking the end of the transmission of one section of video, so that the bit width of the adder required for judging whether the transmission of one section of video is ended is reduced, and the waste of hardware resources is avoided.
Referring to fig. 2 to 4, a video transmission apparatus 100 is further provided. The video transmission apparatus 100 includes an obtaining module 10, a counting module 20, and a determining module 30.
The obtaining module 10 is configured to receive a video source signal and obtain a video data valid indication signal according to the video source signal.
The counting module 20 is configured to count a line count of a vertical signal in the video data valid indication signal.
The decision module 30 is configured to generate a flag bit signal of the vertical signal for marking the end of video transmission when the line count value of the vertical signal is greater than a second preset value K; when the line count value of the vertical signal is smaller than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is larger than the second preset value K.
Referring to fig. 3, in the video transmission apparatus 100 of the present application, the obtaining module 10 includes a receiving unit 11 and a first obtaining unit 12.
Wherein the receiving unit 11 is configured to receive the video source signal.
The first obtaining unit 12 is configured to obtain a video data valid indication signal according to the video source signal.
The video data valid indication signal includes X high level signals, Y low level signals, and Z vertical signals, X, Y, Z being an integer greater than or equal to 0.
Referring to fig. 3, in the video transmission apparatus 100 of the present application, the counting module 20 includes a counting unit 21, a second obtaining unit 22, and a first determining unit 23.
Wherein the counting unit 21 is configured to count the line counts of the low level signal and the vertical signal in the video data valid indication signal.
The second obtaining unit 22 is configured to obtain the line count values of the low level signal and the vertical signal.
The first determining unit 23 is configured to, when the count value of the low-level signal is equal to a first preset value N, add one to the line count value of the vertical signal, and clear the low-level count; and when the counting value of the low-level signals is not equal to a first preset value N, continuing to count the low-level signals in the video data effective indication signals.
The value of the first preset value N is N-2 n -1, n is an integer greater than or equal to 0.
In this embodiment, a relation between the first preset value N and the total number Y of the low level signals is N × L ≦ N × N (L + 1).
Wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1.
The first preset value N is the total number of the low levels in each counting cycle period.
The value of the second preset value K is a positive number which is less than or equal to the value of the counting cycle period.
Referring to fig. 4, in the video transmission apparatus 100 of the present application, the counting unit 21 includes a first counting subunit 211, a second counting subunit 212, and a low level signal determining subunit 213.
Wherein, the first counting subunit 211 is configured to count the line counts of the low-level signal and the vertical signal in the video data valid indication signal M times.
The second counting subunit 212 is configured to count the low level signal M +1 times when the video data valid indication signal that is counted M times is the low level signal.
The low level signal determination subunit 213 is configured to, when the video data valid indicator signal counted M times is not the low level signal, clear a count value of the low level signal counted M times and a line count value of the vertical signal.
M is a positive integer less than the value of the count cycle period.
In this embodiment, the relevant working principle of the video transmission apparatus 100 may refer to the video transmission method, and details thereof are not repeated herein.
The application provides a video transmission method and a device thereof. The video transmission method comprises the following steps: receiving a video source signal, and acquiring a video data valid indication signal according to the video source signal; counting a line count of vertical signals in the video data valid indication signal; when the line count value of the vertical signal is greater than a second preset value K, generating a flag bit signal of the vertical signal for marking the end of video transmission; and when the numerical value of the line count of the vertical signal is less than or equal to a second preset value K, continuing to count the line count of the vertical signal until the numerical value of the line count of the vertical signal is greater than the second preset value K. According to the method and the device, the line count of the vertical signals is counted to generate the flag bit signal of the vertical signal for marking the end of transmission of one section of video, so that the bit width of the adder required for judging whether the transmission of the one section of video is ended is reduced, and the waste of hardware resources is avoided.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The video transmission method and the video transmission device provided by the embodiment of the present application are described in detail above, a specific example is applied in the description to explain the principle and the embodiment of the present application, and the description of the above embodiment is only used to help understand the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (6)
1. A method of video transmission, comprising:
receiving a video source signal, and acquiring a video data valid indication signal according to the video source signal;
counting a line count of a vertical signal in the video data valid indication signal;
wherein the step of counting the line count of the vertical signal in the video data valid indication signal comprises: counting a low level signal in the video data valid indication signal and a line count of the vertical signal; acquiring line count values of the low level signal and the vertical signal; when the count value of the low-level signal is equal to a first preset value N, adding one to the line count value of the vertical signal, and clearing the count of the low-level signal; when the counting value of the low-level signal is not equal to a first preset value N, continuing to count the low-level signal in the video data effective indication signal; the value of the first preset value N is N-2N-1, and N is an integer greater than or equal to 0;
wherein the counting the line counts of the low level signal and the vertical signal in the video data valid indication signal comprises: counting the line counts of the low level signal and the vertical signal in the video data valid indication signal for the mth time; when the video data effective indication signal which is counted for the Mth time is the low level signal, counting the low level signal for the M +1 th time; when the video data effective indication signal which is counted for the Mth time is not the low level signal, clearing the count value of the low level signal counted for the Mth time and the line count value of the vertical signal; wherein M is a positive integer less than the value of the count cycle period;
when the line counting value of the vertical signal is greater than a second preset value K, generating a flag bit signal of the vertical signal for marking the end of video transmission; when the line count value of the vertical signal is smaller than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is larger than the second preset value K.
2. The video transmission method according to claim 1, wherein a video source signal is received, and the step of obtaining a video data valid indication signal according to the video source signal comprises:
receiving the video source signal;
acquiring a video data valid indication signal according to the video source signal;
wherein the video data valid indication signal includes X high level signals, Y low level signals, and Z vertical signals, X, Y, Z is an integer greater than or equal to 0.
3. The video transmission method according to claim 2, wherein a relation between the first preset value N and the total number Y of the low level signals is N x L ≦ Y < N (L + 1);
wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1;
the first preset value N is the total number of the low-level signals in each counting cycle period;
the value of the second preset value K is a positive number which is less than or equal to the value of the counting cycle period.
4. The video transmission device is characterized by comprising an acquisition module, a counting module and a judgment module;
the acquisition module is used for receiving a video source signal and acquiring a video data effective indication signal according to the video source signal;
the counting module is used for counting the line count of the vertical signals in the video data effective indication signals;
the counting module comprises a counting unit, a second acquiring unit and a first judging unit;
the counting unit is configured to count line counts of low-level signals and vertical signals in the video data valid indication signal, the second obtaining unit is configured to obtain line count values of the low-level signals and the vertical signals, the first determining unit is configured to, when the count value of the low-level signals is equal to a first preset value N, add one to the line count value of the vertical signals, clear the count of the low-level signals, and when the count value of the low-level signals is not equal to the first preset value N, continue to count the low-level signals in the video data valid indication signal, where a value of the first preset value N is N-2N-1, and N is an integer greater than or equal to 0;
the counting module further includes a first counting subunit, a second counting subunit, and a low level signal determining subunit, where the first counting subunit is configured to count the low level signals and the vertical signals in the video data valid indication signal for an mth time, the second counting subunit is configured to count the low level signals for an M +1 th time when the video data valid indication signal that is counted for the mth time is the low level signal, and the low level signal determining subunit is configured to zero-clear a count value of the low level signals and a row count value of the vertical signals that are counted for the mth time when the video data valid indication signal that is counted for the mth time is not the low level signal, where M is a positive integer smaller than a value of a counting cycle period;
the judging module is used for generating a flag bit signal of the vertical signal for marking the end of video transmission when the line count value of the vertical signal is greater than a second preset value K; when the line count value of the vertical signal is smaller than or equal to the second preset value K, continuing to count the line count of the vertical signal until the line count value of the vertical signal is larger than the second preset value K.
5. The video transmission apparatus according to claim 4, wherein the acquisition module includes a receiving unit and a first acquisition unit;
the receiving unit is used for receiving the video source signal;
the first acquisition unit is used for acquiring a video data valid indication signal according to the video source signal;
wherein the video data valid indication signal includes X high level signals, Y low level signals, and Z vertical signals, X, Y, Z is an integer greater than or equal to 0.
6. The video transmission apparatus according to claim 5, wherein a relation between the first predetermined value N and the total number Y of the low level signals is N x L < Y < N (L + 1);
wherein L is a value of a count cycle period of the low level signal in the video data valid indication signal, and the value of the count cycle period is a positive integer greater than or equal to 1;
the first preset value N is the total number of the low-level signals in each counting cycle period;
the value of the second preset value K is a positive number which is less than or equal to the value of the counting cycle period.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010236494.9A CN111432092B (en) | 2020-03-30 | 2020-03-30 | Video transmission method and device |
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