CN113810645A - System, method and equipment for transmitting custom data of video blanking area - Google Patents
System, method and equipment for transmitting custom data of video blanking area Download PDFInfo
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- CN113810645A CN113810645A CN202111354736.5A CN202111354736A CN113810645A CN 113810645 A CN113810645 A CN 113810645A CN 202111354736 A CN202111354736 A CN 202111354736A CN 113810645 A CN113810645 A CN 113810645A
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- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
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Abstract
The invention belongs to the field of data processing, and particularly relates to a transmission system, a transmission method and transmission equipment for self-defined data of a video blanking area, aiming at solving the problems of poor expansibility and low utilization rate of the blanking area. The invention comprises the following steps: collecting the video data to a cache region; recording the current data size of the cache region; predicting a first line blanking interval Thblank1 from the video signal; the second line blanking interval time Thblank2 is learned through the system clock and the video data, the first line blanking interval time Thblank1 is corrected, the time slot occupied by each kind of data in the current blanking interval is calculated, and the data is transmitted according to the size of the transmitted data dynamically controlled by the line synchronization signal hsync. The invention dynamically adjusts the transmission rate of the user-defined data by self-learning and predicting different video resolutions and efficiently transmits the user-defined data by utilizing the blanking area, thereby reducing the number of cables in cost, reducing the construction difficulty and increasing the transmission distance.
Description
Technical Field
The invention belongs to the field of data processing, and particularly relates to a transmission system, a transmission method and transmission equipment for user-defined data of a video blanking area.
Background
In the field of professional audio-visual, along with the increase of the complexity of a system, the nodes need to transmit not only video and audio data, but also user-defined data information such as keyboard and mouse, a USB flash disk, a serial port, infrared and the like. The prior technical scheme adopts different cables to transmit different data, for example, video cables such as video cables for video, audio cables for audio and the like, the number of the cables is increased along with the increase of data types, so that the cost is high, the construction is complex, the transmission distance of a common cable is limited, and the error rate is high due to the fact that the common cable is easily interfered by the environment. In the prior art, a single optical fiber is used for transmitting various data, user-defined data is transmitted in a video blanking area, the time slot distribution of the blanking area is fixed, the time of the blanking area with high video resolution is short, the time of the blanking area with low video resolution is long, the maximum resolution and the minimum resolution are simultaneously met, and the user-defined data is transmitted in the time of the blanking area with the maximum resolution, so that the utilization rate of the blanking area with low resolution is low.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, the problems of poor expansibility and low utilization rate of the blanking area in the existing video transmission technology, the invention provides a transmission system of self-defined data in the video blanking area, comprising: the device comprises a video data acquisition unit, a video data cache unit, a data volume recording unit, a first line blanking area time acquisition unit, a second line blanking area time acquisition unit, a line blanking area time correction unit, an occupied time slot calculation unit and a data transmission unit;
the video data acquisition unit is configured to acquire video data;
the video data cache unit is configured to collect the video data to a cache region through a data processing module;
the data volume recording unit is configured to record the current data volume of the cache region through the data processing module and transmit the current data volume to the time slot calculating module;
the first line blanking interval time acquisition unit is configured to predict a first line blanking interval time Thblank1 from the video signal by a line blanking interval prediction module;
the second line blanking interval time acquisition unit is configured to learn a second line blanking interval time Thblank2 according to the system clock and the video signal through the self-learning module;
the line blanking interval time correction unit is configured to correct the first line blanking interval time Thblank1 with the second line blanking interval time Thblank2, obtain a third line blanking interval time Thblank3, and transmit the third line blanking interval time Thblank3 to the time slot calculation module;
the occupied time slot calculating unit is configured to calculate the time slot occupied by each kind of data in the blanking area of the current line by the time slot calculating module according to the third line blanking area time Thblank3, the current data size and the effective time slot Tvideo of the video data, and the blanking area is transmitted to the corresponding data transmitting module;
and the data sending unit is configured to dynamically control the size of the sent data according to the time slot occupied by the current blanking area after receiving the effective video signal through the data sending module so as to send the data.
In some preferred embodiments, the first line blanking interval time obtaining unit, specifically, the line blanking interval time prediction module predicts the line blanking interval Thblank1 according to a video pixel clock signal pix _ clk, a field synchronization signal vsync, a first line synchronization signal hsync, and a video data valid signal de of the video. In some preferred embodiments, the second line blanking interval time obtaining unit, specifically, the self-learning module completes learning of the second line blanking interval Thblank2 within 2 frames according to the system clock sys _ clk, the video field synchronization signal vsync, the first line synchronization signal hsync, and the video data valid signal de.
In some preferred embodiments, the data sending unit, specifically, sends a complete data frame when the data sending module confirms that the received second row synchronization signal hsync is valid; the complete data frame comprises video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line blanking interval times Thblank 3.
In some preferred embodiments, the data transmission module transmits a complete data frame when the received second line synchronization signal hsync is valid, specifically, when the resolution of the video data is determined, the video line time slot Trow, the video valid time slot Tvideo and the third line blanking time Thblank3 are fixed, and the data transmission rate is dynamically adjusted by adjusting the time slot occupied by each data in the third line blanking time Thblank 3.
In some preferred embodiments, the data transmission rate is dynamically adjusted by adjusting the time slot occupied by each type of data in the third line blanking interval Thblank3, specifically, the amount of data for sending custom data in the line blanking interval is increased at the minimum resolution of the video data.
In another aspect of the present invention, a method for transmitting customized data in a video line blanking area is provided, including:
step S100, video data is obtained;
step S200, collecting the video data to a cache region;
step S300, recording the current data size of the cache region;
step S400, predicting a first line blanking interval Thblank1 through a video signal;
step S500, learning a second line blanking interval Thblank2 through a system clock and a video signal;
step S600, correcting the first line blanking interval Thblank1 by the second line blanking interval time Thblank2 to obtain a third line blanking interval Thblank 3;
step S700, calculating the time slot of each kind of data occupied in the blanking area of the current line according to the third line blanking area time Thblank3, the size of the current data volume and the effective time slot Tvideo of the video data;
and step S800, after receiving the effective video signal, dynamically controlling the size of the sending data according to the time slot occupied by the current blanking area to send the data.
In some preferred embodiments, the step S800 specifically includes: when the received second row synchronization signal hsync is confirmed to be valid, a complete data frame is sent; the complete data frame comprises video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line blanking interval times Thblank 3.
In a third aspect of the present invention, an electronic device is provided, including: at least one processor; and a memory communicatively coupled to at least one of the processors; the memory stores instructions executable by the processor, and the instructions are used for being executed by the processor to realize the transmission method of the video blanking area custom data.
In a fourth aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for being executed by the computer to implement the above-mentioned transmission method of the video blanking area custom data.
The invention has the beneficial effects that:
(1) the invention realizes long-distance and low-delay transmission of audio and video and user-defined data between nodes on the uplink of one optical fiber, dynamically adjusts the transmission rate of the user-defined data by self-learning and predicting different video resolutions, ensures normal transmission of video, and efficiently transmits the user-defined data by utilizing the blanking area, thereby reducing the number of cables in cost, reducing the construction difficulty and increasing the transmission distance.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a block diagram of a transmission system for customized data in video blanking area according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a prior art system using different cables to transmit different data;
FIG. 3 is a schematic diagram of a prior art method for transmitting multiple data by using one optical fiber, transmitting custom data in a video blanking area, and fixing allocation of time slots in the blanking area;
FIG. 4 is a functional block diagram of an embodiment of a system for transmission of video blanking area custom data in accordance with the present invention;
FIG. 5 is a diagram of an algorithm implemented in an embodiment of the system for transmission of video blanking area customization data in accordance with the present invention;
fig. 6 is a schematic diagram of the total time slot of the previous video line in the embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention provides a transmission system of self-defined data in a video blanking area, which realizes long-distance and low-delay transmission of audio and video and self-defined data between nodes on an optical fiber uplink, dynamically adjusts the transmission rate of the self-defined data by self-learning and predicting different video resolutions, ensures normal transmission of video, and simultaneously utilizes the blanking area to efficiently transmit the self-defined data, thereby reducing the number of cables in cost, reducing construction difficulty and increasing transmission distance.
The system comprises: the device comprises a video data acquisition unit, a video data cache unit, a data volume recording unit, a first blanking area time acquisition unit, a second blanking area time acquisition unit, a line blanking area time correction unit, an occupied time slot calculation unit and a data transmission unit;
the video data acquisition unit is configured to acquire video data;
the video data cache unit is configured to collect the video data to a cache region through a data processing module;
the data volume recording unit is configured to record the current data volume of the cache region through the data processing module and transmit the current data volume to the time slot calculating module;
the first line blanking interval time acquisition unit is configured to predict a first line blanking interval time Thblank1 from the video signal by a line blanking interval prediction module;
the second line blanking interval time acquisition unit is configured to learn a second line blanking interval time Thblank2 according to the system clock and the video signal through the self-learning module;
the line blanking interval time correction unit is configured to correct the first line blanking interval time Thblank1 with the second line blanking interval time Thblank2, obtain a third line blanking interval time Thblank3, and transmit the third line blanking interval time Thblank3 to the time slot calculation module;
the occupied time slot calculating unit is configured to calculate the time slot occupied by each kind of data in the blanking area of the current line by the time slot calculating module according to the third line blanking area time Thblank3, the current data size and the effective time slot Tvideo of the video data, and the blanking area is transmitted to the corresponding data transmitting module;
and the data sending unit is configured to dynamically control the size of the sent data according to the time slot occupied by the current blanking area after receiving the effective video signal through the data sending module so as to send the data.
In order to more clearly describe the transmission system of the video blanking area customized data of the present invention, the following describes each functional module in the embodiment of the present invention in detail with reference to fig. 1.
In the existing technical scheme, different cables are adopted to transmit different data, for example, video cables such as video cables for video, audio cables for audio and the like are used for video, the number of cables is increased along with the increase of data types, so that the cost is high, the construction is complex, the transmission distance of a common cable is limited, and the error rate is high due to the fact that the common cable is easily interfered by the environment, as shown in fig. 2. In the prior art, a single optical fiber is used for transmitting various data, and custom data is transmitted in a video blanking area, wherein the time slot allocation of the blanking area is fixed, the time of the blanking area with high video resolution is short, the time of the blanking area with low video resolution is long, and the time of the blanking area with low video resolution is long, so that the maximum resolution and the minimum resolution are simultaneously met, and the utilization rate of the blanking area with low resolution is low, as shown in fig. 3.
As shown in fig. 1, the transmission system of the video blanking area custom data according to the first embodiment of the present invention includes a video data obtaining unit, a video data buffering unit, a data amount recording unit, a first blanking area time obtaining unit, a second blanking area time obtaining unit, a blanking area time correcting unit, an occupied time slot calculating unit, and a data sending unit, and each functional module is described in detail as follows:
the technical term used in this application is abbreviated sys _ clk: a local system clock; pix _ clk: a video pixel clock signal; vsync: a field sync signal; hsync: a line synchronization signal; de: a video data valid signal; and (5) Trow: video line time slots; tvideo: a video time slot; thblank: a video blanking area time slot; time _ slot: the slot value.
Each line of video data has a blanking area, and when the blanking area transmits data, the data must be transmitted on the premise of ensuring normal transmission of video, the existing method sets completely same time slots, but because the blanking areas with different video resolutions have different time, a mechanism needs to be designed to realize efficient utilization of the blanking areas to transmit custom data, and the principle of the embodiment is shown in fig. 4. In fig. 4, the video processing module collects video data and buffers the video data to perform the functions of format conversion and de-interlacing.
The video data acquisition unit is configured to acquire video data;
the video data cache unit is configured to collect the video data to a cache region through a data processing module;
the data volume recording unit is configured to record the current data volume of the cache region through the data processing module and transmit the current data volume to the time slot calculating module;
the first line blanking interval time acquisition unit is configured to predict a first line blanking interval time Thblank1 from the video signal by a line blanking interval prediction module;
in this embodiment, the first line blanking interval time obtaining unit is specifically configured to predict the line blanking interval time Thblank1 by the line blanking interval time prediction module according to a video pixel clock signal pix _ clk, a field synchronization signal vsync, a first line synchronization signal hsync, and a video data valid signal de of the video. Htotal (total time between two DE falling edges) and Hactive (DE effective time) are calculated by a blanking region calculation method in the CEA861-E specification, and a blanking region Hblank = Htotal-Hactive can be obtained.
The second line blanking interval time acquisition unit is configured to learn a second line blanking interval time Thblank2 according to the system clock and the video signal through the self-learning module;
in this embodiment, the second line blanking interval time obtaining unit, specifically, the self-learning module completes learning of the second line blanking interval time Thblank2 within 2 frames according to the system clock sys _ clk, the video field synchronization signal vsync, the first line synchronization signal hsync, and the video data valid signal de. In a specific application scenario, the self-learning module corrects the first line blanking interval time Thblank1 in real time by the second line blanking interval time Thblank2 learned by the self-learning module to prevent the video transmission error caused by the too large time deviation of the predicted line blanking interval due to pix _ clk jitter, so as to form closed-loop detection and increase the robustness of the system.
The line blanking interval time correction unit is configured to correct the first line blanking interval time Thblank1 with the second line blanking interval time Thblank2, obtain a third line blanking interval time Thblank3, and transmit the third line blanking interval time Thblank3 to the time slot calculation module; the second line blanking interval time Thblank2 corrects the first line blanking interval time Thblank1 by presetting a protection Threshold value thresholded _ TH according to practical debugging experience, correcting the corresponding data of the second line blanking interval time Thblank2 in place of the data of the first line blanking interval time Thblank1 when the first line blanking interval time Thblank1 is greater than the protection Threshold value thresholded _ TH, and continuing to adopt the first line blanking interval time Thblank1 when the first line blanking interval time Thblank1 is less than or equal to the protection Threshold value thresholded _ TH. That is, since Thblank2 and Thblank1 are different due to slight jitter of signals, frequent adjustment of Thblank3 may cause video display jitter. That is, when the difference between Thblank2 and Thblank1 is small, the first line blanking interval time Thblank1 is still used.
When an exception occurs, only hsync and de are usually valid, and pix _ clk is invalid, and the video is invalid, and if sys _ clk, hsync and de signals are still used for calculating the blanking interval time, video data errors can be caused, so that the first line blanking interval time thwlank 1 is corrected through the second line blanking interval time thwlank 2, and the blanking interval time can be correctly and stably calculated.
The occupied time slot calculating unit is configured to calculate the time slot occupied by each kind of data in the blanking area of the current line by the time slot calculating module according to the third line blanking area time Thblank3, the current data size and the effective time slot Tvideo of the video data, and the blanking area is transmitted to the corresponding data transmitting module;
and the data sending unit is configured to dynamically control the size of the sent data according to the time slot occupied by the current blanking area after receiving the effective video signal through the data sending module so as to send the data.
In this embodiment, the data sending unit specifically sends a complete data frame when the data sending module confirms that the received second row synchronization signal hsync is valid; the complete data frame includes video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line times Thblank3, as shown in fig. 6.
In this embodiment, the data sending module sends a complete data frame when confirming that the received second line synchronization signal hsync is valid, specifically, after the resolution of the video data is determined, the video line timeslot Trow, the video valid timeslot Tvideo, and the third line blanking interval Thblank3 are constant values, and the data transmission rate is dynamically adjusted by adjusting the timeslot occupied by each type of data in the third line blanking interval Thblank 3.
In this embodiment, the data transmission rate is dynamically adjusted by adjusting the time slot occupied by each type of data in the third line blanking interval Thblank3, specifically, the data amount of the custom data transmitted in the blanking interval is increased when the resolution of the video data is minimum. The blanking zones of the minimum resolution and the maximum resolution of the video have large difference, if a fixed time slot is used, when two extreme resolutions are met, the blanking zone of the maximum resolution is completely used, and when the minimum resolution is met, a part of the blanking zone is in an idle state, and the situation can be avoided by dynamic adjustment, namely, the data volume of sending the custom data in the blanking zone can be increased when the minimum resolution is met, and the time of the blanking zone is fully utilized. Further, the custom data is assigned a weight, and the sum of the weights of all the custom data is 1, assuming that the weight of the custom data n is An, a1+ a2+ A3+ … … + An = 1. The time Tn taken for the custom data n to occupy Thblank3 is:
the weights take effect on the falling edge of the de signal. When the resolution ratio is different, the time occupied by data transmission is adjusted by adjusting the weight, and the time of the whole line blanking area is fully utilized. The flow algorithm of this embodiment is shown in fig. 5.
It should be noted that, the transmission system of the video blanking area custom data provided in the foregoing embodiment is only illustrated by the division of the foregoing functional modules, and in practical applications, the above functions may be allocated to different functional modules according to needs, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the above described functions. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not to be construed as unduly limiting the present invention.
The transmission method of the video blanking area custom data of the second embodiment of the invention comprises the following steps:
step S100, video data is obtained;
step S200, collecting the video data to a cache region;
step S300, recording the current data size of the cache region;
step S400, predicting a first line blanking interval Thblank1 through a video signal;
step S500, learning a second line blanking interval Thblank2 through a system clock and a video signal;
step S600, correcting the first line blanking interval Thblank1 by the second line blanking interval time Thblank2 to obtain a third line blanking interval Thblank 3;
step S700, calculating the time slot of each kind of data occupied in the blanking area of the current line according to the third line blanking area time Thblank3, the size of the current data volume and the effective time slot Tvideo of the video data;
and step S800, after receiving the effective video signal, dynamically controlling the size of the sending data according to the time slot occupied by the current blanking area to send the data.
In this embodiment, step S800 specifically includes: when the received second row synchronization signal hsync is confirmed to be valid, a complete data frame is sent; the complete data frame comprises video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line blanking interval times Thblank3
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related descriptions of the method described above may refer to the corresponding process in the foregoing system embodiment, and are not described herein again.
An electronic apparatus according to a third embodiment of the present invention includes: at least one processor; and a memory communicatively coupled to at least one of the processors; the memory stores instructions executable by the processor, and the instructions are used for being executed by the processor to realize the transmission method of the video blanking area custom data.
A computer-readable storage medium of a fourth embodiment of the present invention stores computer instructions for being executed by the computer to implement the transmission method of the video blanking area custom data described above.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A system for transmitting video blanking area customization data, the system comprising: the device comprises a video data acquisition unit, a video data cache unit, a data volume recording unit, a first line blanking area time acquisition unit, a second line blanking area time acquisition unit, a line blanking area time correction unit, an occupied time slot calculation unit and a data transmission unit;
the video data acquisition unit is configured to acquire video data;
the video data cache unit is configured to collect the video data to a cache region through a data processing module;
the data volume recording unit is configured to record the current data volume of the cache region through the data processing module and transmit the current data volume to the time slot calculating module;
the first line blanking interval time acquisition unit is configured to predict a first line blanking interval time Thblank1 from the video signal by a line blanking interval prediction module;
the second line blanking interval time acquisition unit is configured to learn a second line blanking interval time Thblank2 according to the system clock and the video signal through the self-learning module;
the line blanking interval time correction unit is configured to correct the first line blanking interval time Thblank1 with the second line blanking interval time Thblank2, obtain a third line blanking interval time Thblank3, and transmit the third line blanking interval time Thblank3 to the time slot calculation module; the occupied time slot calculating unit is configured to calculate the time slot occupied by each kind of data in the blanking area of the current line by the time slot calculating module according to the third line blanking area time Thblank3, the current data size and the effective time slot Tvideo of the video data, and the blanking area is transmitted to the corresponding data transmitting module;
and the data sending unit is configured to dynamically control the size of the sent data according to the time slot occupied by the current blanking area after receiving the effective video signal through the data sending module so as to send the data.
2. The system of claim 1, wherein the first line blanking area time obtaining unit is specifically a line blanking area time prediction module that predicts a line blanking area time Thblank1 according to a video pixel clock signal pix _ clk, a field sync signal vsync, a first line sync signal hsync, and a video data valid signal de of the video.
3. The system for transmitting customized data of video blanking areas as claimed in claim 1, wherein the second line blanking area time obtaining unit, specifically, the self-learning module, completes the learning of the second line blanking area time Thblank2 within 2 frames according to the system clock sys _ clk, the video field sync signal vsync, the first line sync signal hsync, and the video data valid signal de.
4. The system according to claim 1, wherein the data sending unit, in particular, sends a complete data frame when the data sending module confirms that the received second line synchronization signal hsync is valid; the complete data frame comprises video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line blanking interval times Thblank 3.
5. The system of claim 4, wherein the data transmission module transmits a complete data frame when the data transmission module determines that the received second line synchronization signal hsync is valid, and in particular, when the resolution of the video data is determined, the video line timeslot Trow, the video valid timeslot Tvideo and the third line blanking interval Thblank3 are constant, and the data transmission rate is dynamically adjusted by adjusting the time slot occupied by each data in the third line blanking interval Thblank 3.
6. The system for transmitting customized data in video blanking area as claimed in claim 5, wherein the data transmission rate is dynamically adjusted by adjusting the time slot occupied by each data in the third row blanking interval Thblank3, specifically, the data amount of the customized data transmitted in the line blanking area is increased at the minimum resolution of the video data.
7. A method for transmitting video blanking area custom data, the method comprising:
step S100, video data is obtained;
step S200, collecting the video data to a cache region;
step S300, recording the current data size of the cache region;
step S400, predicting a first line blanking interval Thblank1 through a video signal;
step S500, learning a second line blanking interval Thblank2 through a system clock and a video signal;
step S600, correcting the first line blanking interval Thblank1 by the second line blanking interval time Thblank2 to obtain a third line blanking interval Thblank 3;
step S700, calculating the time slot of each kind of data occupied in the blanking area of the current line according to the third line blanking area time Thblank3, the size of the current data volume and the effective time slot Tvideo of the video data;
and step S800, after receiving the effective video signal, dynamically controlling the size of the sending data according to the time slot occupied by the current blanking area to send the data.
8. The method for transmitting customized data of video blanking area according to claim 7, wherein the step S800 specifically comprises: when the received second row synchronization signal hsync is confirmed to be valid, a complete data frame is sent; the complete data frame comprises video data of the length of the active time slot Tvideo of the video data and custom data of the length of the n third line blanking interval times Thblank 3.
9. An electronic device, comprising: at least one processor; and a memory communicatively coupled to at least one of the processors; wherein the memory stores instructions executable by the processor for performing the method of transmitting video blanking area customization data according to any one of claims 7 to 8.
10. A computer readable storage medium storing computer instructions for execution by the computer to implement the method of transmission of video blanking area customization data according to any one of claims 7 to 8.
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