Audio and video signal input switching system based on Type-C and HDMI interface

Abstract

The present invention discloses an audio and video signal input switching system based on Type-C and HDMI interfaces, and relates to the technical field of audio and video signal processing. In order to solve the problem that certain signal loss or delay will occur during the processing of the signal through an encoder, a switch and a decoder, and when multi-format audio and video signals are obtained, some devices are incompatible with the above-mentioned audio and video signal switching device, thereby limiting its application scope; the audio and video signal input switching system based on Type-C and HDMI interfaces includes: a signal input unit, an intelligent control unit, a signal output unit, a digital display unit and a power module; by combining the Type-C interface and the HDMI interface, the direct transmission and switching of audio and video signals are realized, breaking the limitations of traditional audio and video signal transmission, providing users with more flexible and convenient options, and meeting the user's needs for high compatibility and high-quality transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of audio and video signal processing, and in particular to an audio and video signal input switching system based on Type-C and HDMI interfaces. Background Art

[0002] With the rapid development of electronic technology, the interface types of audio and video equipment are becoming more and more diverse. Among them, Type-C and HDMI interfaces are widely used in various devices due to their high-speed transmission and high-quality audio and video output characteristics. Now, regarding the audio and video input switching system, the patent application with publication number: CN111491114A discloses an audio and video signal switching device and a switching method, including: an encoder for communicating with an audio and video signal source, a switch for communicating with the encoder, and a decoder for communicating with the switch and for communicating with an audio and video player; the encoder is used to receive the audio and video signal emitted by the audio and video signal source, encode the audio and video signal to obtain an encoded signal, and send the encoded signal to the switch; the switch is used to receive the encoded signal and send the encoded signal to the decoder; the decoder is used to receive the encoded signal, decode the encoded signal to obtain a decoded signal, and send the decoded signal to the audio and video player.

[0003] Although the above patent application can connect more signal sources and audio and video players, certain signal loss or delay will occur when the signal is processed by the encoder, switch and decoder. When obtaining multi-format audio and video signals, some devices will be incompatible with the above-mentioned audio and video signal switching device, thereby limiting its scope of application. Summary of the invention

[0004] The purpose of the present invention is to provide an audio and video signal input switching system based on Type-C and HDMI interfaces, combining the Type-C interface and the HDMI interface to realize direct transmission and switching of audio and video signals, breaking the limitations of traditional audio and video signal transmission, providing users with more flexible and convenient options, meeting users' needs for high compatibility and high-quality transmission, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The audio and video signal input switching system based on Type-C and HDMI interface includes:

[0007] The signal input unit is used to receive the audio and video digital signals of the Type-C and HDMI interfaces, and convert the received audio and video digital signals into a unified format;

[0008] An intelligent control unit, used to identify and process audio and video digital signals according to user operation instructions and preset rules, and control the switching, conversion and transmission of the processed audio and video digital signals;

[0009] A signal output unit, used to output the processed audio and video digital signals to a digital display unit;

[0010] A digital display unit is used to receive audio and video digital signals, convert them into displayable audio and video content, and display user settings and system configuration information;

[0011] The power module is used to provide a stable power supply for the signal input unit, the intelligent control unit, the signal output unit and the digital display unit.

[0012] Furthermore, the signal input unit comprises:

[0013] Type-C interface module, used to receive audio and video digital signals transmitted through the Type-C interface;

[0014] HDMI interface module, used for receiving audio and video digital signals transmitted through the HDMI interface;

[0015] The signal monitoring module is used to obtain the audio and video digital signals received from the Type-C and HDMI interfaces, perform quality evaluation on the obtained audio and video digital signals, and monitor the status of the audio and video digital signals.

[0016] Furthermore, the signal monitoring module includes:

[0017] The data acquisition submodule is used to obtain the audio and video digital signals transmitted through the Type-C interface and the HDMI interface in real time, and pre-process the audio and video digital signals;

[0018] The format conversion submodule is used for converting the video format, audio format, resolution and color space of the digital signal preprocessed by the data acquisition submodule;

[0019] The signal classification submodule is used to extract features based on the data category of the digital signal, identify and classify the digital signal based on its features, and store the classified digital signal.

[0020] Furthermore, the signal monitoring module monitors the status of the audio and video digital signals, and also includes:

[0021] Detect whether the Type-C and HDMI interfaces are connected to audio and video signal sources, perform data format detection on the connected audio and video signal sources, and determine whether their data formats meet the preset audio and video coding standards. If they do not meet the audio and video coding standards, they are determined to be invalid signal sources.

[0022] The valid signal source is classified into data types based on the video frame and audio stream, and the integrity of the video frame and the continuity of the audio stream are detected based on the classification results. If the data is complete, the verification is determined to be completed. If the data is incomplete, it is judged to be an invalid signal.

[0023] Furthermore, the data acquisition submodule pre-processes the audio and video digital signals, specifically:

[0024] Extract the upper limit time value and the lower limit time value of the value range of the unit time, obtain the data volume of the audio and video digital signal collected per unit time, and determine the maximum allowable redundant data volume during data transmission according to the data volume of the audio and video digital signal;

[0025] During the data transmission process, the amount of redundant data in the transmission channel is monitored in real time, and when the transmission redundant data in the transmission channel reaches the maximum allowable redundant data amount, data clearing of the transmission channel is performed.

[0026] Further, the maximum allowable redundant data amount during data transmission is determined according to the data amount of the audio and video digital signals, including:

[0027] Extract the upper limit time value of the value range of unit time;

[0028] Extracting the data volume of the audio and video digital signals from the historical record data of data transmission;

[0029] The historical record data is time-divided according to the upper limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to a plurality of first unit times is obtained, wherein the first unit time is the same as the upper limit time value of the value range of the unit time;

[0030] Acquire redundant data corresponding to each first unit time according to the data amount of the audio and video digital signal corresponding to the first unit time;

[0031] Obtain a first redundant data coefficient according to the redundant data corresponding to the first unit time; wherein the first redundant data coefficient is obtained by the following formula:

[0032] ,

[0033] Among them, R 01 represents the first redundant data coefficient; n represents the number of the first unit time; C ri represents the amount of redundant data corresponding to the i-th first unit time; C ni represents the data volume of the audio and video digital signal corresponding to the i-th first unit time; C nrd represents the data volume of the audio and video digital signal in the first unit time corresponding to the maximum data volume of the redundant data; C nrxThe data volume of the audio and video digital signal per first unit time corresponding to the minimum data volume of the redundant data;

[0034] The historical record data is time-divided according to the lower limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to multiple second unit times is obtained, wherein the second unit time is the same as the upper limit time value of the value range of the unit time;

[0035] Acquire redundant data corresponding to each second unit time according to the data amount of the audio and video digital signal corresponding to the second unit time;

[0036] The second redundant data coefficient is obtained according to the redundant data corresponding to the second unit time; wherein the second redundant data coefficient is obtained by the following formula:

[0037] ,

[0038] Among them, R 02 represents the second redundant data coefficient; m represents the number of the second unit time; C rj represents the amount of redundant data corresponding to the jth second unit time; C mj represents the data volume of the audio and video digital signal corresponding to the jth second unit time; C mrd represents the data volume of the audio and video digital signal per second unit time corresponding to the maximum data volume of the redundant data; C mrx The data volume of the audio and video digital signal per second unit time corresponding to the minimum data volume of the redundant data;

[0039] The maximum allowable redundant data amount is obtained using the first redundant data coefficient and the second redundant data coefficient.

[0040] Further, obtaining a maximum allowable amount of redundant data using the first redundant data coefficient and the second redundant data coefficient includes:

[0041] extracting a first redundant data coefficient and a second redundant data coefficient;

[0042] Extracting the maximum value of the redundant data of the data volume of the determined audio and video digital signal per unit time corresponding to the current data transmission during the data transmission process as the reference redundant data volume;

[0043] The maximum allowable redundant data amount is obtained by using the first redundant data coefficient, the second redundant data coefficient and the reference redundant data amount, wherein the maximum allowable redundant data amount is obtained by the following formula:

[0044] ,

[0045] Among them, Cmax represents the maximum amount of redundant data allowed; C0 represents the baseline amount of redundant data; R 01 represents the first redundant data coefficient; R 02 Represents the second redundant data coefficient; R 03 represents the third redundant data coefficient, and the third redundant data coefficient is obtained by the following formula:

[0046] ,

[0047] Among them, R 03 represents the third redundant data coefficient; k represents the number of determined unit times corresponding to the current data transmission; C rt represents the amount of redundant data corresponding to the tth determined unit time; C kt represents the data volume of the audio and video digital signal corresponding to the t-th determined unit time; C krd The data volume of the audio and video digital signal per unit time corresponding to the maximum data volume of the redundant data; C krx Indicates the data volume of the audio and video digital signal per determined unit time corresponding to the minimum data volume of the redundant data.

[0048] Furthermore, the intelligent control unit comprises:

[0049] Audio and video source identification module, used for:

[0050] When receiving audio and video digital signals from the Type-C interface and the HDMI interface, the access interface is determined according to the status of the current audio and video digital signals output by the signal monitoring module, the user's needs, and the preset priority rules, and the audio and video digital signals accessed by the interface are obtained as the currently output audio and video source;

[0051] Audio and video signal processing module, used for:

[0052] Perform digital signal processing on the audio and video source determined to be a Type-C interface, encode the digital signal into a format suitable for transmission and storage, and parse and process it according to the protocol of the display device;

[0053] The minimized transmission differential signal is decoded for the audio and video source determined to be the HDMI interface. At the same time, the basic information of the display device is obtained based on the DDC communication, and the decoded minimized transmission differential signal is decoded for audio and video to restore the original audio and video data.

[0054] Furthermore, the signal output unit further includes:

[0055] Build a communication link between the Type-C and HDMI interfaces and the display device, monitor the communication data volume of the communication link in real time, and obtain the communication data volume within a preset unit period;

[0056] Constructing a unit cycle quantity model according to the communication data volume, calculating the maximum communication data volume of the communication link within the unit cycle, and setting the number of standby communication links based on the communication data volume of the real-time monitoring communication link;

[0057] Setting a corresponding number of standby communication links according to the set number of the standby communication links, and numbering the standby communication links in sequence;

[0058] The link operation quality of the communication link is monitored in real time, and when the link operation quality is lower than a preset quality standard, the communication link is switched.

[0059] Furthermore, the digital display unit comprises:

[0060] A display module, used to configure the decoded audio and video digital information based on the audio and video content displayed by the display device and user settings;

[0061] The security protection module is used to determine the threat risk index and vulnerability risk index of the display device, perform a security assessment on the display device, and screen out safe display devices based on the security assessment results of the display device.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] The signal input unit receives audio and video digital signals from Type-C and HDMI interfaces, and performs unified format conversion to achieve direct transmission and switching of audio and video signals, breaking the limitations of traditional audio and video signal transmission, enhancing the compatibility and versatility of the system, and allowing users to easily connect devices with different interfaces without worrying about interface mismatches. The intelligent control unit can intelligently identify and process audio and video digital signals according to user operating instructions and preset rules, achieve signal switching, conversion and transmission, and improve operational convenience. The digital display unit can display audio and video content as well as user settings and system configuration information in real time to help users better understand the status of digital signals and make adjustments. Security assessments of display devices help ensure the security of the system and avoid risks such as audio and video leakage or system crashes caused by equipment safety issues. The power module provides a stable power supply for the entire system to ensure that the system can operate normally in various environments, ensuring the stable transmission and reliability of audio and video signals, providing users with more flexible and convenient options to meet user needs for high compatibility and high-quality transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 This is a module diagram of the audio and video signal input switching system based on Type-C and HDMI interfaces of the present invention. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In order to solve the technical problem that when the signal is processed by the encoder, switch and decoder, there will be a certain signal loss or delay, and when obtaining multi-format audio and video signals, some devices are incompatible with the above-mentioned audio and video signal switching device, thereby limiting its application scope, please refer to Figure 1 , this embodiment provides the following technical solutions:

[0067] The audio and video signal input switching system based on Type-C and HDMI interface includes:

[0068] The signal input unit is used to receive the audio and video digital signals of the Type-C and HDMI interfaces, and convert the received audio and video digital signals into a unified format;

[0069] An intelligent control unit, used to identify and process audio and video digital signals according to user operation instructions and preset rules, and control the switching, conversion and transmission of the processed audio and video digital signals;

[0070] A signal output unit, used to output the processed audio and video digital signals to a digital display unit;

[0071] The digital display unit is used to receive audio and video digital signals, convert them into displayable audio and video content, and display user settings and system configuration information, including:

[0072] The display module is used to configure the decoded audio and video digital information based on the audio and video content displayed by the display device and the user settings, including volume, brightness, resolution, audio and video synchronization, current signal source, etc., so that the user can understand the status of the system and make adjustments;

[0073] A security protection module is used to determine the threat risk index and vulnerability risk index of the display device, perform security assessment on the display device, and screen out safe display devices based on the security assessment results of the display device;

[0074] Specifically, basic information of the display device is obtained, historical transmission data of the display device of this type is obtained based on the basic information of the display device, the historical transmission data is parsed to determine its integrity and security, and the threat risk index and vulnerability risk index of the display device of this type are evaluated based on the integrity and security; the security index of the display device is calculated based on the threat risk index and vulnerability risk index of each type of display device using a preset risk assessment system, so as to screen out safe display devices and risky display devices based on the security index;

[0075] The power module is used to provide a stable power supply for the signal input unit, the intelligent control unit, the signal output unit and the digital display unit.

[0076] In this embodiment, the audio and video digital signals of the Type-C and HDMI interfaces are received through the signal input unit, and a unified format conversion is performed, which enhances the compatibility and versatility of the system and enables users to easily connect devices with different interfaces without worrying about interface mismatches. The intelligent control unit can intelligently identify and process the audio and video digital signals according to the user's operating instructions and preset rules, realize signal switching, conversion and transmission, and improve the convenience of operation. The digital display unit can display the audio and video content as well as user settings and system configuration information in real time to help users better understand the status of the digital signal and make adjustments. The security assessment of the display device helps to ensure the security of the system and avoid the risks of audio and video leakage or system crashes due to equipment security issues. The power module provides a stable power supply for the entire system to ensure that the system can operate normally in various environments, thereby ensuring the stable transmission and reliability of audio and video signals.

[0077] In this embodiment, the signal input unit includes:

[0078] Type-C interface module, used to receive audio and video digital signals transmitted through the Type-C interface;

[0079] HDMI interface module, used for receiving audio and video digital signals transmitted through the HDMI interface;

[0080] The signal monitoring module is used to obtain the audio and video digital signals received from the Type-C and HDMI interfaces, evaluate the quality of the obtained audio and video digital signals, and monitor the status of the audio and video digital signals, including:

[0081] The data acquisition submodule is used to obtain the audio and video digital signals transmitted through the Type-C interface and the HDMI interface in real time, and pre-process the audio and video digital signals;

[0082] In this embodiment, the data acquisition submodule also pre-processes the audio and video digital signals, specifically:

[0083] Extract the upper limit time value and the lower limit time value of the value range of the unit time, obtain the data volume of the audio and video digital signal collected per unit time, and determine the maximum allowable redundant data volume during data transmission according to the data volume of the audio and video digital signal;

[0084] During the data transmission process, the amount of redundant data in the transmission channel is monitored in real time, and when the transmission redundant data in the transmission channel reaches the maximum allowable redundant data amount, data cleaning of the transmission channel is performed;

[0085] The format conversion submodule is used for converting the video format, audio format, resolution and color space of the digital signal preprocessed by the data acquisition submodule;

[0086] The signal classification submodule is used to extract features based on the data category of the digital signal, identify and classify based on the digital signal features, and store the classified digital signals for subsequent digital signal processing and analysis. For example, in audio and video processing, digital signals may be classified according to audio volume, pitch, timbre and other features; in video processing, digital signals may be classified according to image brightness, contrast, color and other features.

[0087] In this embodiment, by integrating Type-C and HDMI interface modules, it is compatible with audio and video devices of different interface types, greatly enhancing its versatility and flexibility, acquiring and preprocessing audio and video digital signals in real time to ensure the accuracy and integrity of the data. At the same time, the signal quality is evaluated and monitored, signal problems are discovered and processed in a timely manner, stable transmission of audio and video signals is ensured, and the preprocessed audio and video digital signals are format converted to ensure that the signals can be correctly displayed and played on different devices or platforms.

[0088] Specifically, the maximum allowable redundant data volume during data transmission is determined according to the data volume of the audio and video digital signals, including:

[0089] Extract the upper limit time value of the value range of unit time;

[0090] Extracting the data volume of the audio and video digital signals from the historical record data of data transmission;

[0091] The historical record data is time-divided according to the upper limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to a plurality of first unit times is obtained, wherein the first unit time is the same as the upper limit time value of the value range of the unit time;

[0092] Acquire redundant data corresponding to each first unit time according to the data amount of the audio and video digital signal corresponding to the first unit time;

[0093] Obtain a first redundant data coefficient according to the redundant data corresponding to the first unit time; wherein the first redundant data coefficient is obtained by the following formula:

[0094] ,

[0095] Among them, R 01 represents the first redundant data coefficient; n represents the number of the first unit time; C ri represents the amount of redundant data corresponding to the i-th first unit time; C ni represents the data volume of the audio and video digital signal corresponding to the i-th first unit time; C nrd represents the data volume of the audio and video digital signal in the first unit time corresponding to the maximum data volume of the redundant data; C nrx The data volume of the audio and video digital signal per first unit time corresponding to the minimum data volume of the redundant data;

[0096] The historical record data is time-divided according to the lower limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to multiple second unit times is obtained, wherein the second unit time is the same as the upper limit time value of the value range of the unit time;

[0097] Acquire redundant data corresponding to each second unit time according to the data amount of the audio and video digital signal corresponding to the second unit time;

[0098] The second redundant data coefficient is obtained according to the redundant data corresponding to the second unit time; wherein the second redundant data coefficient is obtained by the following formula:

[0099] ,

[0100] Among them, R 02 represents the second redundant data coefficient; m represents the number of the second unit time; C rj represents the amount of redundant data corresponding to the jth second unit time; C mj represents the data volume of the audio and video digital signal corresponding to the jth second unit time; C mrd represents the data volume of the audio and video digital signal per second unit time corresponding to the maximum data volume of the redundant data; C mrx The data volume of the audio and video digital signal per second unit time corresponding to the minimum data volume of the redundant data;

[0101] The maximum allowable redundant data amount is obtained using the first redundant data coefficient and the second redundant data coefficient.

[0102] The technical effect of the above technical solution is: by extracting the amount of audio and video digital signal data and its corresponding amount of redundant data within a unit time (including an upper limit time value and a lower limit time value), the solution can dynamically determine the maximum allowable amount of redundant data according to the actual change of the signal. This dynamic adjustment capability makes the data transmission process more flexible and can better adapt to different network environments or changes in signal source quality. By calculating the first redundant data coefficient (R01) and the second redundant data coefficient (R02), the solution can accurately control the amount of redundant data, while ensuring the reliability and integrity of data transmission, and reducing unnecessary redundant data as much as possible, thereby improving the overall efficiency of data transmission.

[0103] In the process of audio and video digital signal transmission, the addition of redundant data is an important means to ensure data integrity and reliability. This solution scientifically calculates the redundant data coefficient to ensure that the original signal can be restored through appropriate redundant data even in the case of network fluctuations or signal quality degradation, thereby improving the reliability of data transmission. By analyzing and processing the audio and video digital signals and their redundant data in the historical record data, this solution not only provides an optimization basis for current data transmission, but also has certain data analysis and prediction capabilities. This helps to better deal with possible problems and challenges in the future data transmission process. By accurately controlling the amount of redundant data, the solution avoids waste of resources. In the case of limited bandwidth or tight storage space, reasonable control of the amount of redundant data can ensure that resources are used more effectively.

[0104] In summary, this technical solution significantly improves the overall performance and stability of audio and video digital signals during data transmission by dynamically adjusting the amount of redundant data, optimizing transmission efficiency, improving reliability, enhancing data analysis and prediction capabilities, and realizing effective resource utilization.

[0105] Specifically, obtaining a maximum allowable amount of redundant data using the first redundant data coefficient and the second redundant data coefficient includes:

[0106] extracting a first redundant data coefficient and a second redundant data coefficient;

[0107] Extracting the maximum value of the redundant data of the data volume of the determined audio and video digital signal per unit time corresponding to the current data transmission during the data transmission process as the reference redundant data volume;

[0108] The maximum allowable redundant data amount is obtained by using the first redundant data coefficient, the second redundant data coefficient and the reference redundant data amount, wherein the maximum allowable redundant data amount is obtained by the following formula:

[0109] ,

[0110] Among them, C max represents the maximum amount of redundant data allowed; C0 represents the baseline amount of redundant data; R 01 represents the first redundant data coefficient; R 02 Represents the second redundant data coefficient; R 03 represents the third redundant data coefficient, and the third redundant data coefficient is obtained by the following formula:

[0111] ,

[0112] Among them, R 03 represents the third redundant data coefficient; k represents the number of determined unit times corresponding to the current data transmission; C rt represents the amount of redundant data corresponding to the tth determined unit time; C kt represents the data volume of the audio and video digital signal corresponding to the t-th determined unit time; C krd The data volume of the audio and video digital signal per unit time corresponding to the maximum data volume of the redundant data; C krx Indicates the data volume of the audio and video digital signal per determined unit time corresponding to the minimum data volume of the redundant data.

[0113] The technical effect of the above technical solution is: when determining the maximum allowable redundant data volume, the solution not only considers the first redundant data coefficient (R01) and the second redundant data coefficient (R02) in the historical data, but also introduces the third redundant data coefficient (R03) in the current data transmission process. This comprehensive consideration makes the final maximum allowable redundant data volume more comprehensive and accurate, and can better adapt to the actual situation of the current data transmission. By introducing the redundant data coefficient (R03) in the current data transmission process, the solution can adjust the maximum allowable redundant data volume in real time or near real time according to the current data transmission status. This dynamic adjustment capability makes the data transmission process more flexible and can better cope with changes in factors such as network conditions and signal quality.

[0114] By accurately calculating the maximum allowable amount of redundant data, the scheme can minimize the amount of redundant data while ensuring the reliability and integrity of data transmission, thereby optimizing resource allocation. This helps ensure that resources are used more efficiently when bandwidth is limited or storage space is tight. Reducing unnecessary redundant data can significantly improve the efficiency of data transmission. By scientifically calculating the maximum allowable amount of redundant data, the scheme avoids excessive addition of redundant data, thereby improving the speed and efficiency of data transmission. Appropriate redundant data is the key to ensuring the stability and reliability of data transmission. By accurately controlling the amount of redundant data, the scheme ensures that the original signal can be restored through redundant data even in the case of network fluctuations or signal quality degradation, thereby enhancing the stability and robustness of the system. By defining and calculating multiple redundant data coefficients (R01, R02, R03), the scheme provides configurability for system administrators or users. They can adjust the values ​​of these coefficients according to actual needs to optimize the performance and effect of data transmission.

[0115] To sum up, this technical solution comprehensively considers historical data and current data transmission status, dynamically adjusts the maximum allowable amount of redundant data, optimizes resource allocation, and improves data transmission efficiency and stability, providing a more reliable and efficient solution for the data transmission of audio and video digital signals.

[0116] In this embodiment, the signal monitoring module monitors the state of the audio and video digital signal, and also includes:

[0117] Detect whether the Type-C and HDMI interfaces are connected to audio and video signal sources, perform data format detection on the connected audio and video signal sources, and determine whether their data formats meet the preset audio and video coding standards. If they do not meet the audio and video coding standards, they are determined to be invalid signal sources.

[0118] The valid signal source is classified into data types based on the video frame and audio stream, and the integrity of the video frame and the continuity of the audio stream are detected based on the classification results. If the data is complete, the verification is determined to be completed. If the data is incomplete, it is judged to be an invalid signal.

[0119] In this embodiment, by detecting the signal sources connected to the Type-C and HDMI interfaces, it is ensured that only signal sources that meet the preset audio and video encoding standards can be connected and processed, avoiding interference and potential damage to the system by invalid signal sources, thereby improving the stability and reliability of the system, classifying the data types of valid signal sources, and performing more accurate processing and analysis on different types of data. Further, based on the integrity and continuity detection of video frames and audio streams, the system can ensure the integrity and continuity of audio and video data, avoiding playback problems caused by data loss or damage, thereby optimizing signal quality, timely discovering and processing problems in audio and video signals, and ensuring the stability and high-quality output of audio and video signals by intelligently identifying and processing audio and video sources. Users do not need to worry about the selection and switching of signal sources, and can focus more on watching and enjoying content, ensuring that users can obtain stable and high-quality audio and video experience, and supporting multiple audio and video encoding formats and display device protocols. Users can obtain consistent high-quality audio and video experience on different devices, further improving user satisfaction, multiple interfaces and audio and video encoding formats, so that the system can be compatible with different types of audio and video devices and content sources, so that the system can adapt to more complex application scenarios.

[0120] In this embodiment, the intelligent control unit includes:

[0121] Audio and video source identification module, used for:

[0122] When receiving audio and video digital signals from the Type-C interface and the HDMI interface, the access interface is determined according to the status of the current audio and video digital signals output by the signal monitoring module, the user's needs, and the preset priority rules, and the audio and video digital signals accessed by the interface are obtained as the currently output audio and video source;

[0123] Audio and video signal processing module, used for:

[0124] Perform digital signal processing on audio and video sources identified as Type-C interfaces. For audio signals, use tools such as equalizers, compressors, and limiters to adjust frequency response, dynamic range, and time domain characteristics. For video signals, perform resolution adjustment and frame rate conversion, encode digital signals into formats suitable for transmission and storage, such as MP3, AAC, WAV, H.264, H.265, etc., and parse and process them according to the protocol of the display device.

[0125] The minimized transmission differential signal is decoded for the audio and video source determined to be the HDMI interface. At the same time, the basic information of the display device is obtained based on the DDC communication, and the decoded minimized transmission differential signal is decoded for audio and video to restore the original audio and video data.

[0126] In this embodiment, the audio and video source identification module ensures that when multiple signal sources are connected, the status of the Type-C interface and the HDMI interface is monitored in real time, and the most suitable audio and video source is automatically selected as the current output, which greatly improves the intelligence level of the system. The audio and video signal processing module performs differentiated processing for different interfaces and different types of audio and video sources. For the audio and video source of the Type-C interface, the audio signal is finely adjusted through tools such as equalizers, compressors, and limiters to meet the different needs of users for sound quality; at the same time, the video signal is processed by resolution adjustment, frame rate conversion, etc. to meet the requirements of different display devices; for the audio and video source of the HDMI interface, the minimized transmission differential signal decoding technology is adopted to ensure the efficiency and stability of signal transmission. At the same time, the basic information of the display device is obtained through DDC communication, which further improves the accuracy of signal processing and ensures the compatibility and transmittability of audio and video data.

[0127] In this embodiment, the signal output unit further includes:

[0128] Build a communication link between the Type-C and HDMI interfaces and the display device, monitor the communication data volume of the communication link in real time, and obtain the communication data volume within a preset unit period;

[0129] Constructing a unit cycle quantity model according to the communication data volume, calculating the maximum communication data volume of the communication link within the unit cycle, and setting the number of standby communication links based on the communication data volume of the real-time monitoring communication link;

[0130] Setting a corresponding number of standby communication links according to the set number of the standby communication links, and numbering the standby communication links in sequence;

[0131] The link operation quality of the communication link is monitored in real time, and when the link operation quality is lower than a preset quality standard, the communication link is switched.

[0132] In this embodiment, by real-time monitoring of the communication data volume of the communication link, and building a unit cycle quantity model based on these data, the maximum communication data volume within the unit cycle is accurately predicted and calculated, ensuring the stability and efficiency of the communication link, providing data support for subsequent link optimization, and automatically setting an appropriate number of backup communication links based on the real-time monitored communication data volume to ensure that when a problem occurs in the main link, it is quickly switched to the backup link to maintain the continuity of communication, and the backup links are numbered in sequence to achieve more efficient link management and switching, and the link operation quality of the communication link is monitored in real time. Once the link operation quality is lower than the preset quality standard, the communication link is automatically switched; ensuring that when a link fails or has quality problems, it is quickly restored to a normal communication state, thereby ensuring the stable transmission of audio and video signals;

[0133] In this embodiment, since the system can intelligently manage and optimize communication links and automatically switch links when necessary, users do not need to worry about link problems affecting the transmission of audio and video signals. It can provide users with a smoother and higher-quality audio and video experience. Through real-time monitoring, intelligent setting of backup links, and automatic switching, it ensures stable communication performance in a variety of complex scenarios, greatly enhancing the reliability and stability of audio and video signals.

[0134] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An audio and video signal input switching system based on Type-C and HDMI interfaces, characterized in that: include: The signal input unit is used to receive the audio and video digital signals of the Type-C and HDMI interfaces, and convert the received audio and video digital signals into a unified format; An intelligent control unit, used to identify and process audio and video digital signals according to user operation instructions and preset rules, and control the switching, conversion and transmission of the processed audio and video digital signals; A signal output unit, used to output the processed audio and video digital signals to a digital display unit; A digital display unit is used to receive audio and video digital signals, convert them into displayable audio and video content, and display user settings and system configuration information; A power module is used to provide a stable power supply for the signal input unit, the intelligent control unit, the signal output unit and the digital display unit; Signal input unit, comprising: Type-C interface module, used to receive audio and video digital signals transmitted through the Type-C interface; HDMI interface module, used for receiving audio and video digital signals transmitted through the HDMI interface; The signal monitoring module is used to obtain the audio and video digital signals received from the Type-C and HDMI interfaces, evaluate the quality of the obtained audio and video digital signals, and monitor the status of the audio and video digital signals; Signal monitoring module, including: The data acquisition submodule is used to obtain the audio and video digital signals transmitted through the Type-C interface and the HDMI interface in real time, and pre-process the audio and video digital signals; The format conversion submodule is used for converting the video format, audio format, resolution and color space of the digital signal preprocessed by the data acquisition submodule; The signal classification submodule is used to extract features based on the data category of the digital signal, identify and classify the digital signal based on its features, and store the classified digital signal; The signal monitoring module monitors the status of the audio and video digital signals, and also includes: Detect whether the Type-C and HDMI interfaces are connected to audio and video signal sources, perform data format detection on the connected audio and video signal sources, and determine whether their data formats meet the preset audio and video coding standards. If they do not meet the audio and video coding standards, they are determined to be invalid signal sources. The valid signal source is classified into data types based on the video frame and audio stream, and the integrity of the video frame and the continuity of the audio stream are detected based on the classification results. If the data is complete, the verification is determined to be completed. If the data is incomplete, it is judged to be an invalid signal; The maximum amount of redundant data allowed during data transmission is determined based on the amount of audio and video digital signals, including: Extract the upper limit time value of the value range of unit time; Extracting the data volume of the audio and video digital signals from the historical record data of data transmission; The historical record data is time-divided according to the upper limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to a plurality of first unit times is obtained, wherein the first unit time is the same as the upper limit time value of the value range of the unit time; Acquire redundant data corresponding to each first unit time according to the data amount of the audio and video digital signal corresponding to the first unit time; Obtain a first redundant data coefficient according to the redundant data corresponding to the first unit time; wherein the first redundant data coefficient is obtained by the following formula: ， Among them, R 01 represents the first redundant data coefficient; n represents the number of the first unit time; C ri represents the amount of redundant data corresponding to the i-th first unit time; C ni represents the data volume of the audio and video digital signal corresponding to the i-th first unit time; C nrd represents the data volume of the audio and video digital signal in the first unit time corresponding to the maximum data volume of the redundant data; C nrx The data volume of the audio and video digital signal per first unit time corresponding to the minimum data volume of the redundant data; The historical record data is time-divided according to the lower limit time value of the value range of the unit time, and the data amount of the audio and video digital signal corresponding to multiple second unit times is obtained, wherein the second unit time is the same as the upper limit time value of the value range of the unit time; Acquire redundant data corresponding to each second unit time according to the data amount of the audio and video digital signal corresponding to the second unit time; The second redundant data coefficient is obtained according to the redundant data corresponding to the second unit time; wherein the second redundant data coefficient is obtained by the following formula: ， Among them, R 02 represents the second redundant data coefficient; m represents the number of the second unit time; C rj represents the amount of redundant data corresponding to the jth second unit time; C mj represents the data volume of the audio and video digital signal corresponding to the jth second unit time; C mrd represents the data volume of the audio and video digital signal per second unit time corresponding to the maximum data volume of the redundant data; C mrx The data volume of the audio and video digital signal per second unit time corresponding to the minimum data volume of the redundant data; Using the first redundant data coefficient and the second redundant data coefficient to obtain the maximum allowable redundant data amount; Obtaining a maximum allowable amount of redundant data using the first redundant data coefficient and the second redundant data coefficient includes: extracting a first redundant data coefficient and a second redundant data coefficient; Extracting the maximum value of the redundant data of the data volume of the determined audio and video digital signal per unit time corresponding to the current data transmission during the data transmission process as the reference redundant data volume; The maximum allowable redundant data amount is obtained by using the first redundant data coefficient, the second redundant data coefficient and the reference redundant data amount, wherein the maximum allowable redundant data amount is obtained by the following formula: ， Among them, C max represents the maximum amount of redundant data allowed; C0 represents the baseline amount of redundant data; R 01 Represents the first redundant data coefficient; R 02 represents the second redundant data coefficient; R 03 represents the third redundant data coefficient, and the third redundant data coefficient is obtained by the following formula: ， Among them, R 03 represents the third redundant data coefficient; k represents the number of determined unit times corresponding to the current data transmission; C rt represents the amount of redundant data corresponding to the tth determined unit time; C kt represents the data volume of the audio and video digital signal corresponding to the t-th determined unit time; C krd The data volume of the audio and video digital signal per unit time corresponding to the maximum data volume of the redundant data; C krx Indicates the data volume of the audio and video digital signal per determined unit time corresponding to the minimum data volume of the redundant data.

2. The audio and video signal input switching system based on Type-C and HDMI interface as claimed in claim 1, characterized in that: The data acquisition submodule pre-processes the audio and video digital signals, specifically: Extract the upper limit time value and the lower limit time value of the value range of the unit time, obtain the data volume of the audio and video digital signal collected per unit time, and determine the maximum allowable redundant data volume during data transmission according to the data volume of the audio and video digital signal; During the data transmission process, the amount of redundant data in the transmission channel is monitored in real time, and when the transmission redundant data in the transmission channel reaches the maximum allowable redundant data amount, data clearing of the transmission channel is performed.

3. The audio and video signal input switching system based on Type-C and HDMI interface as claimed in claim 2, characterized in that: Intelligent control unit, including: Audio and video source identification module, used for: When receiving audio and video digital signals from the Type-C interface and the HDMI interface, the access interface is determined according to the status of the current audio and video digital signals output by the signal monitoring module, the user's needs, and the preset priority rules, and the audio and video digital signals accessed by the interface are obtained as the currently output audio and video source; Audio and video signal processing module, used for: Perform digital signal processing on the audio and video source determined to be a Type-C interface, encode the digital signal into a format suitable for transmission and storage, and parse and process it according to the protocol of the display device; The minimized transmission differential signal is decoded for the audio and video source determined to be the HDMI interface. At the same time, the basic information of the display device is obtained based on the DDC communication, and the decoded minimized transmission differential signal is decoded for audio and video to restore the original audio and video data.

4. The audio and video signal input switching system based on Type-C and HDMI interface as claimed in claim 3, characterized in that: The signal output unit further comprises: Build a communication link between the Type-C and HDMI interfaces and the display device, monitor the communication data volume of the communication link in real time, and obtain the communication data volume within a preset unit period; Constructing a unit cycle quantity model according to the communication data volume, calculating the maximum communication data volume of the communication link within the unit cycle, and setting the number of standby communication links based on the communication data volume of the real-time monitoring communication link; Setting a corresponding number of standby communication links according to the set number of the standby communication links, and numbering the standby communication links in sequence; The link operation quality of the communication link is monitored in real time, and when the link operation quality is lower than a preset quality standard, the communication link is switched.

5. The audio and video signal input switching system based on Type-C and HDMI interface as claimed in claim 4, characterized in that: Digital display unit, comprising: A display module, used to configure the decoded audio and video digital information based on the audio and video content displayed by the display device and user settings; The security protection module is used to determine the threat risk index and vulnerability risk index of the display device, perform a security assessment on the display device, and screen out safe display devices based on the security assessment results of the display device.

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