CN118055207A - SDI-based video signal transmission adjustment control system and method - Google Patents
SDI-based video signal transmission adjustment control system and method Download PDFInfo
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Abstract
The application relates to a video signal transmission adjustment control system based on an SDI (secure digital interface), which comprises a signal equalization processing module and a clock recovery module, wherein the signal equalization module comprises a first signal input end, a first signal output end and a second signal output end, the first signal input end is coupled with a video source and is used for receiving the SDI video signal, the first signal output end outputs a loop-out signal, the second signal output end is coupled with the clock recovery module and is used for receiving the SDI video signal and prolonging the signal length of the SDI video signal, the processed SDI video signal is transmitted to the clock recovery module, the clock recovery module comprises a second signal input end and a third signal output end, the second signal input end is coupled with the second signal output end of the signal equalization processing module, the third signal output end of the clock recovery module is coupled with a video playing end, and the clock recovery module is used for carrying out clock recovery and regeneration on the processed SDI video signal and transmitting the SDI video signal to the video playing end. The application has the effects of improving the transmission quality of SDI video signals and reducing signal attenuation.
Description
Technical Field
The application relates to the field of video signal switching control, in particular to a video signal switching control system and method based on SDI.
Background
Currently in a typical studio, such as a local news station, the content of the play-out is controlled by an SDI video switcher, which receives SDI video signals from different sources, such as a live camera or video server.
However, since the SDI coaxial cable in the field has different lengths, the signal to be finally output is attenuated or distorted, and the video quality is finally reduced, so that there is a certain room for improvement.
Disclosure of Invention
In order to improve the transmission quality of an SDI video signal and reduce signal attenuation, the application provides a video signal transmission adjustment control system and a video signal transmission adjustment control method based on the SDI.
In a first aspect, the present application provides a video signal transmission adjustment control system based on SDI, which adopts the following technical scheme:
The signal equalization module comprises a first signal input end, a first signal output end and a second signal output end, wherein the first signal input end is coupled with a video source and is used for receiving SDI video signals, the first signal output end outputs looped-out signals, the second signal output end is coupled with the clock recovery module and is used for receiving the SDI video signals and prolonging the signal length of the SDI video signals, the processed SDI video signals are transmitted to the clock recovery module, the clock recovery module comprises a second signal input end and a third signal output end, the second signal input end is coupled with the second signal output end of the signal equalization processing module, the third signal output end of the clock recovery module is coupled with the video playing end, and the clock recovery module is used for carrying out clock recovery and regeneration on the processed SDI video signals and transmitting the SDI video signals to the video playing end.
By adopting the technical scheme, in the SDI video signal transmission process, the SDI video signal is transmitted into the signal equalization processing module through the first signal input end, the signal length of the transmitted SDI video signal is prolonged through the signal equalization processing module, the self-adaptive cable equalizer compensates the signal attenuation caused by long-distance transmission, the SDI video signal is restored to the original quality level in the transmission process, the signal attenuation problem caused by the cable length can be effectively solved, the signal equalization processing module outputs the processed SDI video signal through two paths, for example, the first signal output end outputs loop signals for other components to be practical, the second signal output end transmits the loop signals to the clock recovery module, the processed SDI video signal is subjected to clock recovery and regeneration through the clock recovery module, the time standard of the SDI video signal is corrected, the signal quality is improved, the third signal output end of the clock recovery module transmits the SDI video playing end, the transmission of the video signal is completed, the whole SDI video signal transmission process is processed through the signal equalization processing module and the clock recovery module, the problem of the video signal attenuation caused by the cable is reduced, and the stability of the video signal is improved.
Preferably, the signal equalization processing module includes a first chip U1, the first chip U1 includes twenty-five pins, the first pin and the second pin of the first chip U1 are first signal input ends, the first pin and the second pin of the first chip U1 are respectively coupled with a video signal source to input an SDI video signal, the fourteenth pin and the fifteenth pin of the first chip U1 are first signal output ends, the fourteenth pin and the fifteenth pin of the first chip U1 output loop-out signals, the seventeenth pin and the eighteenth pin of the first chip U1 are second signal output ends, and the seventeenth pin and the eighteenth pin of the first chip U1 are coupled with the clock recovery module.
Through adopting above-mentioned technical scheme, SDI video signal passes through first pin and the second pin of first chip U1 and transmits to signal equalization processing module, SDI video signal carries out signal length extension through first chip U1, and first chip U1 makes SDI video signal self-adaptation equalizer, compensate the SDI video signal attenuation because long distance transmission causes, SDI video signal quality and stability have been improved, simultaneously, first chip U1 provides the double-circuit output function, one of them output is used for being connected to clock recovery module, another way is as the loop-out signal output for transmitting SDI video signal to other equipment components of system.
Preferably, the clock recovery module includes a second chip U2, the second chip U2 includes twenty-fifth pins, the eleventh pin and the twelfth pin of the second chip U2 are second signal input ends, the eleventh pin of the second chip U2 is coupled to the eighteenth pin of the first chip U1, the twelfth pin of the second chip U2 is coupled to the seventeenth pin of the first chip U1, the nineteenth pin, the twentieth pin, the twenty-second pin and the twenty-third pin of the second chip U2 are third signal output ends, the nineteenth pin and the twentieth pin of the second chip U2 output first specification signals, and the twenty-second pin and the twenty-third pin of the second chip U2 output second specification signals.
Through adopting above-mentioned technical scheme, the SDI video signal after signal length extension is transmitted to clock recovery module through eleventh pin and twelfth pin of second chip U2, utilize second chip U2 to carry out clock recovery and regeneration to the SDI video signal after handling, correct the time reference of the SDI video signal after handling, the nineteenth pin of rethread second chip U2, twentieth pin, twenty second pin and twenty third pin output the SDI video signal of two kinds of different specifications respectively, and then can support multiple multimedia option, improve the suitability.
Preferably, the system further comprises a micro control module, wherein the micro control module is respectively coupled with the signal equalization processing module and the clock recovery module, and is used for coordinating the signal processing of the SDI video signals by the signal equalization processing module and the clock recovery module.
By adopting the technical scheme, the signal equalization processing module and the clock recovery module are coordinated through the micro control module, so that the processing precision of the signal equalization processing module and the clock recovery module to the SDI video signal is improved, the signal quality of the SDI video signal in the transmission process is further improved, and the quality and the stability of the SDI video signal are further improved.
Preferably, the micro control module includes a third chip U3, and the third chip U3 includes a control output end, where the control output end is coupled to the signal equalization processing module and the clock recovery module, respectively, so as to output a coordination signal to the signal equalization processing module and the clock recovery module.
Through adopting above-mentioned technical scheme, through the control output of third chip U3, output coordinated signal to signal balance processing module and clock recovery module, micro control module coordinated control signal balance processing module and clock recovery module handle SDI video signal, have improved the processing accuracy to SDI video signal.
In a second aspect, the present application provides a video signal transmission adjustment control method based on SDI, which adopts the following technical scheme:
The SDI-based video signal transmission adjustment control method comprises the following steps:
acquiring an SDI video signal, and acquiring a signal quality characteristic based on the SDI video signal;
Generating a signal adjustment processing instruction according to the signal quality characteristics, and responding to the signal adjustment processing instruction to acquire signal length extension data;
Performing length extension processing on the SDI video signal based on the signal length extension data to obtain an extended SDI video signal;
And acquiring signal time reference data according to the prolonged SDI video signal, and correcting and recovering the signal time reference data by a clock recovery module to obtain a repaired SDI video signal.
By adopting the technical scheme, in the SDI video signal transmission process, the SDI video signal is transmitted into the signal equalization processing module through the first signal input end, the signal length of the transmitted SDI video signal is prolonged through the signal equalization processing module, the self-adaptive cable equalizer compensates the signal attenuation caused by long-distance transmission, the SDI video signal is restored to the original quality level in the transmission process, the signal attenuation problem caused by the cable length can be effectively solved, the signal equalization processing module outputs the processed SDI video signal through two paths, for example, the first signal output end outputs loop signals for other components to be practical, the second signal output end transmits the loop signals to the clock recovery module, the processed SDI video signal is subjected to clock recovery and regeneration through the clock recovery module, the time standard of the SDI video signal is corrected, the signal quality is improved, the third signal output end of the clock recovery module transmits the SDI video playing end, the transmission of the video signal is completed, the whole SDI video signal transmission process is processed through the signal equalization processing module and the clock recovery module, the problem of the video signal attenuation caused by the cable is reduced, and the stability of the video signal is improved.
The present application may be further configured in a preferred example to: the acquiring the SDI video signal, acquiring a signal quality feature based on the SDI video signal, specifically includes:
denoising and filtering the SDI video signal to obtain a processed SDI video signal;
Inputting the SDI video signal into a preset feature analysis model, extracting signal jumping point information, and taking the signal jumping point information as a signal quality feature.
Through adopting above-mentioned technical scheme, can mix with other electromagnetic interference signals at the SDI video signal that obtains, carry out filter processing to the SDI video signal, remove the interference signal, improve the precision of SDI video signal processing, after removing the interference signal, carry out denoising processing to the SDI video signal, the signal jumping point of quick extraction SDI video signal, regard as signal quality characteristic with all signal jumping point information, can filter the SDI video signal that signal quality is poor fast, so as to handle the SDI video signal that signal quality is poor.
The present application may be further configured in a preferred example to: the length extension processing is performed on the SDI video signal based on the signal length extension data to obtain an extended SDI video signal, which specifically comprises:
Inputting the signal length extension data into a signal equalization processing module, and acquiring signal length defect characteristics based on the SDI video signal;
And the signal equalization processing module carries out extension correction processing on the signal length defect characteristics according to the signal length extension data to obtain an extended SDI video signal.
By adopting the technical scheme, the acquired signal length extension data are input into the signal equalization processing module, meanwhile, the SDI video signals transmitted into the signal equalization processing module are utilized to acquire signal length defect characteristics, the signal length defect characteristics refer to SDI video signal characteristics which cause signal attenuation due to overlong cables, and the signal equalization processing module obtains the SDI video signals after the signal length extension according to the length extension processing of the SDI video signals, so that the functions of extending the signal length and reducing the signal attenuation are realized.
In summary, the present application includes at least one of the following beneficial technical effects:
1. in the SDI video signal transmission process, the SDI video signal is transmitted into a signal equalization processing module through a first signal input end, the signal length of the transmitted SDI video signal is prolonged through the signal equalization processing module, a self-adaptive cable equalizer compensates signal attenuation caused by long-distance transmission, so that the SDI video signal is restored to the original quality level in the transmission process, the signal attenuation problem caused by the cable length can be effectively solved, the signal equalization processing module outputs the processed SDI video signal through two paths, such as a loop signal is output through a first signal output end for other components for practical use, the processed SDI video signal is transmitted to a clock recovery module through a second signal output end, the processed SDI video signal is subjected to clock recovery and regeneration through the clock recovery module, the time reference of the SDI video signal is corrected, the signal quality is improved, the transmission of the SDI video signal is completed through a third signal output end of the clock recovery module, the whole SDI video signal transmission process is utilized to process the SDI video signal, the problem of overlong signal caused by the cable is reduced, and the quality and stability of the SDI video signal are improved;
2. The SDI video signal with the prolonged signal length is transmitted to a clock recovery module through an eleventh pin and a twelfth pin of the second chip U2, the second chip U2 is utilized to carry out clock recovery and regeneration on the processed SDI video signal, the time standard of the processed SDI video signal is corrected, and two SDI video signals with different specifications are respectively output through a nineteenth pin, a twentieth pin, a twenty second pin and a twenty third pin of the second chip U2, so that various multimedia options can be supported, and the applicability is improved;
The SDI video signal is transmitted to the signal equalization processing module through the first pin and the second pin of the first chip U1, the signal length of the SDI video signal is prolonged through the first chip U1, the first chip U1 enables the SDI video signal to be self-adaptive equalizer to compensate the attenuation of the SDI video signal caused by long-distance transmission, the quality and stability of the SDI video signal are improved, meanwhile, the first chip U1 provides a double-path output function, one path of output is used for being connected to the clock recovery module, the other path of output is used as loop-out signal output, and the other path of output is used for transmitting the SDI video signal to other equipment components of the system;
4. The micro control module is used for carrying out coordination processing on the signal equalization processing module and the clock recovery module, so that the processing precision of the signal equalization processing module and the clock recovery module on the SDI video signal is improved, the signal quality of the SDI video signal in the transmission process is further improved, and the quality and the stability of the SDI video signal are further improved.
Drawings
Fig. 1 is a block diagram of a video signal transmission adjustment control system based on SDI according to an embodiment of the present application.
Fig. 2 is a circuit diagram of a signal equalization processing module of the SDI-based video signal transmission adjustment control system according to an embodiment of the present application.
Fig. 3 is a circuit diagram of a clock recovery module of the SDI-based video signal transmission adjustment control system according to an embodiment of the present application.
Fig. 4 is a circuit diagram of a micro control module of a video signal transmission adjustment control system based on SDI according to an embodiment of the present application.
Fig. 5 is a flowchart of an embodiment of a video signal transmission adjustment control method based on SDI according to the present application.
Fig. 6 is a flowchart showing an implementation of step S10 in the SDI-based video signal transmission adjustment control method according to the present application.
Fig. 7 is a flowchart showing an implementation of step S30 in the SDI-based video signal transmission adjustment control method according to the present application.
Reference numerals illustrate: 1. a signal equalization processing module; 2. a clock recovery module; 3. and a micro control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to fig. 1 to 7.
In an embodiment, referring to fig. 1, the SDI-based video signal transmission adjustment control system includes a signal equalization processing module 1, a clock recovery module 2, and a micro control module 3. The signal equalization processing module 1 comprises a first signal input end, a first signal output end and a second signal output end, wherein the first signal input end of the signal equalization processing module 1 is coupled to a video signal source end and is used for receiving an SDI video signal, the first signal output end outputs a loop-out signal, the second signal output end is coupled with the clock recovery module 2, the clock recovery module 2 comprises a second signal input end and a third signal output end, the second signal input end is coupled to the second signal output end of the signal equalization processing module 1, the third signal output end of the clock recovery module 2 is coupled to a video playing end, and the micro control module 3 is respectively coupled to the signal equalization processing module 1 and the clock recovery module 2.
Referring to fig. 2, the signal equalization processing module 1 includes a first chip U1, the model of the first chip U1 is LMH0324RTWR, the first chip U1 includes twenty-five pins, the first pin and the second pin of the first chip U1 are first signal input ends, the first pin of the first chip U1 is connected in series with a capacitor C10, the second pin of the first chip U1 is connected in series with a capacitor C9, the first pin and the second pin of the first chip U1 input SDI video signals of 75Ω, the fourteenth pin and the fifteenth pin of the first chip U1 are first signal output ends, the fourteenth pin of the first chip U1 is connected in series with a capacitor C16, the fifteenth pin of the first chip U1 is connected in series with a capacitor C15, the fourteenth pin and the fifteenth pin of the first chip U1 output signals of 50Ω, the seventeenth pin and the eighteenth pin of the first chip U1 are second signal output ends, and the seventeenth pin and eighteenth pin of the first chip U1 are coupled to the clock recovery module 2.
Referring to fig. 3, the clock recovery module 2 includes a second chip U2 with model number LMH0318RTWR, the second chip U2 includes twenty-fifth pins, the eleventh pin and the twelfth pin of the second chip U2 are second signal input ends, the eleventh pin of the second chip U2 is connected in series with a capacitor C100 and then coupled to the eighteenth pin of the first chip U1, the twelfth pin of the second chip U2 is connected in series with a capacitor C101 and then coupled to the seventeenth pin of the first chip U1, the nineteenth pin, the twentieth pin, the twenty-second pin and the twenty-third pin of the second chip U2 are third signal output ends, the nineteenth pin of the second chip U2 is connected in series with a resistor R109, a capacitor C108 and a resistor R101 in parallel, the twentieth pin of the second chip U2 is connected in series with a resistor R108 and a capacitor C107 in parallel, the two ends of the resistor R108 are connected in parallel with an inductor L1, the other end of the capacitor C107 is coupled to the video playing end, the nineteenth pin of the second chip U2 is connected with the video playing end, the twenty-eighth pin of the resistor R101 is connected with the twenty-eighth pin of the second chip, and the twenty-eighth pin of the second chip is connected with the twenty-eighth pin of the second chip.
Referring to fig. 4, the micro control module 3 includes a third chip U3 having a model MSP430F5529IPN, the third chip U3 includes eighty pins, forty-six pins of the third chip U3 are control output ends, forty-six pins of the third chip U3 are respectively coupled to a twenty-first pin of the first chip U1 and a third pin of the second chip U2, forty-seven pins of the third chip U3 are respectively coupled to a tenth pin of the first chip U1 and a fourth pin of the second chip U2, and a coordination signal is output to the signal equalization processing module 1 and the clock recovery module 2.
The implementation principle of the video signal transmission adjustment control system based on the SDI of the embodiment of the application is as follows: in the SDI video signal transmission process, the SDI video signal is transmitted into the signal equalization processing module 1 through the first signal input end, the signal length of the transmitted SDI video signal is prolonged through the signal equalization processing module 1, the self-adaptive cable equalizer compensates for signal attenuation caused by long-distance transmission, so that the SDI video signal is restored to the original quality level in the transmission process, the problem of signal attenuation caused by the cable length can be effectively solved, the signal equalization processing module 1 outputs the processed SDI video signal through two paths, for example, the loop signal is output through the first signal output end for other components to be practical, the processed SDI video signal is transmitted to the clock recovery module 2 through the second signal output end, the clock recovery module 2 carries out clock recovery and regeneration, the time reference of the SDI video signal is corrected, the signal quality is improved, the transmission of the video signal is completed through the third signal output end of the clock recovery module 2, the overlong SDI video signal is processed through the signal equalization processing module 1 and the clock recovery module 2, the problem of signal attenuation caused by the cable is reduced, and the stability of the video signal is improved;
The micro control module 3 is used for carrying out coordination processing on the signal equalization processing module 1 and the clock recovery module 2, so that the processing precision of the signal equalization processing module 1 and the clock recovery module 2 on the SDI video signal is improved, the signal quality of the SDI video signal in the transmission process is further improved, and the quality and the stability of the SDI video signal are further improved.
In an embodiment, as shown in fig. 5, the application further discloses a video signal transmission adjustment control method of the video signal transmission adjustment control system based on the SDI, and the video signal transmission adjustment control method based on the SDI specifically includes the following steps:
s10: an SDI video signal is acquired, and a signal quality feature is acquired based on the SDI video signal.
S20: generating a signal adjustment processing instruction according to the signal quality characteristics, and responding to the signal adjustment processing instruction to acquire signal length extension data.
S30: and performing length extension processing on the SDI video signal based on the signal length extension data to obtain an extended SDI video signal.
S40: and acquiring signal time reference data according to the prolonged SDI video signal, and correcting and recovering the signal time reference data by a clock recovery module to obtain a repaired SDI video signal.
In this embodiment, in the SDI video signal transmission process, the SDI video signal is transmitted to the signal equalization processing module through the first signal input end, the signal length of the transmitted SDI video signal is prolonged by the signal equalization processing module, the adaptive cable equalizer compensates for signal attenuation caused by long-distance transmission, so that the SDI video signal is restored to the original quality level in the transmission process, the signal attenuation problem caused by the cable length can be effectively solved, the signal equalization processing module outputs the processed SDI video signal through two paths, such as outputting a loop signal through the first signal output end for other components, the processed SDI video signal is practically used, and is transmitted to the clock recovery module through the second signal output end, the processed SDI video signal is subjected to clock recovery and regeneration through the clock recovery module, the time reference of the SDI video signal is corrected, the signal quality is improved, the third signal output end of the clock recovery module is transmitted to the video playing end, the transmission of the video signal is completed, the whole SDI video signal transmission process is utilized, the problem of signal attenuation caused by the cable is reduced, and the stability of the video signal is improved.
In one embodiment, as shown in fig. 6, in step S10, an SDI video signal is acquired, and a signal quality feature is acquired based on the SDI video signal, which specifically includes:
s11: and denoising and filtering the SDI video signal to obtain a processed SDI video signal.
S12: inputting the SDI video signal into a preset feature analysis model, extracting signal jumping point information, and taking the signal jumping point information as a signal quality feature.
Specifically, when the SDI video signal is obtained and mixed with other electromagnetic interference signals, filtering processing is performed on the SDI video signal, the interference signals are removed, the accuracy of SDI video signal processing is improved, after the interference signals are removed, denoising processing is performed on the SDI video signal, signal jumping points of the SDI video signal are rapidly extracted, all signal jumping point information is used as signal quality characteristics, and SDI video signals with poor signal quality can be rapidly screened out so as to process the SDI video signals with poor signal quality.
In one embodiment, as shown in fig. 7, in step S30, the length extension process is performed on the SDI video signal based on the signal length extension data, so as to obtain an extended SDI video signal, which specifically includes:
S31: inputting the signal length extension data into a signal equalization processing module, and acquiring signal length defect characteristics based on the SDI video signal.
S32: and the signal equalization processing module carries out extension correction processing on the signal length defect characteristics according to the signal length extension data to obtain an extended SDI video signal.
Specifically, the obtained signal length extension data is input into the signal equalization processing module, meanwhile, the SDI video signal transmitted into the signal equalization processing module is utilized to obtain signal length defect characteristics, the signal length defect characteristics refer to SDI video signal characteristics of signal attenuation caused by overlong cables, and the signal equalization processing module obtains the SDI video signal with the prolonged signal length according to the length extension processing of the SDI video signal, so that the functions of prolonging the signal length and reducing the signal attenuation are realized.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (8)
1. An SDI-based video signal transmission adjustment control system, characterized in that: the SDI video signal processing device comprises a signal equalization processing module (1) and a clock recovery module (2), wherein the signal equalization module comprises a first signal input end, a first signal output end and a second signal output end, the first signal input end is coupled with a video source and is used for receiving an SDI video signal, the first signal output end outputs a loop-out signal, the second signal output end is coupled with the clock recovery module (2), the signal equalization module is used for receiving the SDI video signal and prolonging the signal length of the SDI video signal, the processed SDI video signal is transmitted to the clock recovery module (2), the clock recovery module (2) comprises a second signal input end and a third signal output end, the second signal input end is coupled with the second signal output end of the signal equalization processing module (1), the third signal output end of the clock recovery module (2) is coupled with a video playing end, and the clock recovery module (2) is used for carrying out clock recovery and regeneration on the processed SDI video signal and transmitting the SDI video signal to the video playing end.
2. The SDI-based video signal transmission adjustment control system of claim 1 wherein: the signal equalization processing module (1) comprises a first chip U1, the first chip U1 comprises twenty-five pins, the first pin and the second pin of the first chip U1 are first signal input ends, the first pin and the second pin of the first chip U1 are respectively coupled with a video signal source to input SDI video signals, the fourteenth pin and the fifteenth pin of the first chip U1 are first signal output ends, the fourteenth pin and the fifteenth pin of the first chip U1 output loop-out signals, the seventeenth pin and the eighteenth pin of the first chip U1 are second signal output ends, and the seventeenth pin and the eighteenth pin of the first chip U1 are coupled with the clock recovery module (2).
3. The SDI-based video signal transmission adjustment control system of claim 2 wherein: the clock recovery module (2) comprises a second chip U2, the second chip U2 comprises twenty-five pins, an eleventh pin and a twelfth pin of the second chip U2 are second signal input ends, the eleventh pin of the second chip U2 is coupled to an eighteenth pin of the first chip U1, the twelfth pin of the second chip U2 is coupled to a seventeenth pin of the first chip U1, the nineteenth pin, the twentieth pin, the twenty-second pin and the twenty-third pin of the second chip U2 are third signal output ends, the nineteenth pin and the twentieth pin of the second chip U2 output first specification signals, and the twenty-second pin and the twenty-third pin of the second chip U2 output second specification signals.
4. The SDI-based video signal transmission adjustment control system of claim 1 wherein: the system further comprises a micro control module (3), wherein the micro control module (3) is respectively coupled with the signal equalization processing module (1) and the clock recovery module (2), and the micro control module (3) is used for coordinating the signal processing of the signal equalization processing module (1) and the clock recovery module (2) on the SDI video signals.
5. The SDI-based video signal transmission adjustment control system of claim 4 wherein: the micro control module (3) comprises a third chip U3, the third chip U3 comprises a control output end, and the control output end is respectively coupled with the signal equalization processing module (1) and the clock recovery module (2) so as to output a coordination signal to the signal equalization processing module (1) and the clock recovery module (2).
6. An SDI-based video signal transmission adjustment control method based on the SDI-based video signal transmission adjustment control system according to any one of claims 1 to 5, characterized by: the SDI-based video signal transmission adjustment control method comprises the following steps:
acquiring an SDI video signal, and acquiring a signal quality characteristic based on the SDI video signal;
Generating a signal adjustment processing instruction according to the signal quality characteristics, and responding to the signal adjustment processing instruction to acquire signal length extension data;
Performing length extension processing on the SDI video signal based on the signal length extension data to obtain an extended SDI video signal;
And acquiring signal time reference data according to the prolonged SDI video signal, and correcting and recovering the signal time reference data by a clock recovery module to obtain a repaired SDI video signal.
7. The SDI-based video signal transmission adjustment control method according to claim 6, wherein: the acquiring the SDI video signal, acquiring a signal quality feature based on the SDI video signal, specifically includes:
denoising and filtering the SDI video signal to obtain a processed SDI video signal;
Inputting the SDI video signal into a preset feature analysis model, extracting signal jumping point information, and taking the signal jumping point information as a signal quality feature.
8. The SDI-based video signal transmission adjustment control method according to claim 6, wherein: the length extension processing is performed on the SDI video signal based on the signal length extension data to obtain an extended SDI video signal, which specifically comprises:
Inputting the signal length extension data into a signal equalization processing module, and acquiring signal length defect characteristics based on the SDI video signal;
And the signal equalization processing module carries out extension correction processing on the signal length defect characteristics according to the signal length extension data to obtain an extended SDI video signal.
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| JP2000324366A (en) * | 1999-05-11 | 2000-11-24 | Nec Corp | Video changeover device |
| CN202043234U (en) * | 2011-05-17 | 2011-11-16 | 深圳市中帝威科技有限公司 | Novel SDI (standard data interface) signal extender |
| CN202818499U (en) * | 2012-09-04 | 2013-03-20 | 天津市亚安科技股份有限公司 | SDI signal conditioning device |
| CN110213550A (en) * | 2019-07-04 | 2019-09-06 | 湖南电气职业技术学院 | A kind of multichannel SDI video receiving device |
| WO2021233318A1 (en) * | 2020-05-20 | 2021-11-25 | 宁波中车新能源科技有限公司 | Passive cms equalization circuit and method based on super-capacitor |
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| JP2000324366A (en) * | 1999-05-11 | 2000-11-24 | Nec Corp | Video changeover device |
| CN202043234U (en) * | 2011-05-17 | 2011-11-16 | 深圳市中帝威科技有限公司 | Novel SDI (standard data interface) signal extender |
| CN202818499U (en) * | 2012-09-04 | 2013-03-20 | 天津市亚安科技股份有限公司 | SDI signal conditioning device |
| CN110213550A (en) * | 2019-07-04 | 2019-09-06 | 湖南电气职业技术学院 | A kind of multichannel SDI video receiving device |
| WO2021233318A1 (en) * | 2020-05-20 | 2021-11-25 | 宁波中车新能源科技有限公司 | Passive cms equalization circuit and method based on super-capacitor |
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