CN-121604025-B - Video stable transmission method and system under high-speed moving scene and electronic equipment

CN121604025BCN 121604025 BCN121604025 BCN 121604025BCN-121604025-B

Abstract

The application discloses a video stable transmission method, a system and electronic equipment in a high-speed mobile scene, and relates to the technical field of video transmission and communication, comprising the following steps of acquiring mobile state data of a video transmitting end and judging whether to enter a high-speed mobile transmission state; after entering a high-speed mobile transmission state, acquiring current network link state data, determining a corresponding link risk interval, generating a corresponding transmission control example according to the link risk interval, carrying out structural redundancy construction on video data according to the transmission control example and completing video transmission.

Inventors

Zhang Feitao
MAO XIN
LIAO CHAOJUN
HUANG SHAOJUN

Assignees

深圳市明日实业有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (8)

1. The video stable transmission method in the high-speed moving scene is characterized by comprising the following steps: Acquiring moving state data of a video transmitting end and judging whether the video transmitting end enters a high-speed moving transmission state or not; after entering a high-speed mobile transmission state, acquiring current network link state data and determining a corresponding link risk interval; generating a corresponding transmission control instance according to the link risk interval; Carrying out structural redundancy construction on video data according to a transmission control example and completing video transmission; after the high-speed mobile transmission state is entered, current network link state data are acquired, and corresponding link risk intervals are determined, specifically as follows: after entering a high-speed mobile transmission state, acquiring current network link state data, and synchronously acquiring the change amplitude of the mobile state in a corresponding time period; carrying out time continuity analysis on the link state data, identifying the change behavior of the link state in a continuous time window, and generating link evolution characteristics; Generating an initial link risk representation result according to the link evolution characteristics, and combining the current movement state change amplitude to perform motion perception weighting processing on the initial link risk representation result to obtain a corrected link risk representation result; mapping the current link state to a plurality of preset discrete link risk intervals according to the corrected link risk characterization result; the method comprises the steps of carrying out structural redundancy construction on video data according to a transmission control example and completing video transmission, and specifically comprises the following steps: after a transmission control example is generated, analyzing video data to be transmitted according to the control requirement of transmission priority in the transmission control example, and identifying a key frame and a high-motion area frame as key video data; Splitting the key video data into a plurality of independently recoverable data subunits, so that the whole key video data cannot be reconstructed when any subunit is lost; extracting video content characteristics of all sub-units, distinguishing the importance of the data sub-units by combining the current link risk interval and the moving state variation amplitude, and marking the data units with higher importance as key data sub-units; Carrying out structural redundancy construction on the data subunits according to the importance distinguishing result of the subunits; after the structured redundancy construction is completed, the data subunits and the corresponding redundancy data are uniformly packaged, the sending sequence and the sending rhythm are determined according to the scheduling strategy in the transmission control instance, and the key data subunits and the redundancy data are scheduled preferentially for transmission.
2. The method for stably transmitting video in a high-speed mobile scenario according to claim 1, wherein the method for acquiring mobile status data of a video transmitting end and determining whether to enter a high-speed mobile transmission state is specifically as follows: acquiring moving state data of the video mobile terminal in real time, and fusing to form a comprehensive moving state vector; according to the comprehensive movement state vector, short-term trend analysis is carried out on the movement change in a plurality of recent sampling periods, and the direction and the amplitude of the future movement state change are predicted; in the trend analysis process, the change consistency of the continuous prediction result is evaluated, and the prediction result is corrected by combining a sliding window accumulation mode to form a prospective motion trend; dynamically adjusting a high-speed movement judgment threshold according to the prospective movement trend, and comparing the corrected prospective movement trend with the high-speed movement judgment threshold; and when the prospective motion trend exceeds the dynamic threshold, judging to enter a high-speed mobile transmission state, and otherwise, keeping a conventional transmission mode.
3. The method for stably transmitting video in a high-speed moving scene according to claim 2, wherein in the trend analysis process, the consistency of the continuous prediction result is evaluated, and the prediction result is corrected by combining a sliding window accumulation mode to form a prospective motion trend, which is specifically as follows: based on the comprehensive movement state vector, generating corresponding movement state prediction results in a plurality of continuous time windows, and storing the prediction results in time sequence to form a prediction result sequence; Based on the prediction result sequence, carrying out state evolution analysis on the change behavior of the adjacent prediction results in the time dimension, and marking the prediction results with evolution characteristics as candidate prediction results; triggering corresponding preparation transmission control actions according to the candidate prediction results, and collecting system response information generated after the preparation transmission control actions are triggered; Comparing and analyzing the system response information in the continuous time window, and judging whether the predicted result has response consistency in a cross-layer feedback layer; The prediction results meeting the state evolution self-convergence and cross-layer feedback response consistency at the same time are confirmed to be effective prediction results; Inputting the effective prediction result into a sliding window for accumulation processing; And forming a prospective motion trend based on the prediction result after the consistency evaluation and the sliding window accumulation correction.
4. The method for stably transmitting video in a high-speed mobile scene according to claim 1, wherein the method is characterized by generating an initial link risk characterization result according to link evolution characteristics, and performing motion perception weighting processing on the initial link risk characterization result by combining with a current mobile state change amplitude to obtain a corrected link risk characterization result, and specifically comprises the following steps: Grading the influence of each feature in the link evolution features on the link stability, and combining the feature grades to form an initial link risk characterization result; Taking the change amplitude of the moving state as a modulation condition, and carrying out differentiation processing on different evolution types contained in the initial link risk characterization result; And performing motion perception correction on the initial link risk representation result through differentiation processing of the movement state change amplitude, and generating a link risk representation result after the motion perception correction.
5. The method for stably transmitting video in a high-speed mobile scene according to claim 1, wherein the generating a corresponding transmission control instance according to a link risk interval is specifically as follows: Determining control data of video transmission according to the level of the link risk interval; Combining the moving state change amplitude and the link evolution trend information with the control data, and dynamically adjusting the control data to form final control data; Splitting the adjusted control data into specific execution instructions of a coding layer, a transmission layer and an application layer, and combining upper layer video frame information to form a cross-layer cooperative transmission control example.
6. The method for stably transmitting video in a high-speed mobile scene according to claim 1, wherein the extracting video content features of each subunit, and combining the current link risk interval and the mobile state variation range, distinguishes the importance of the data subunits, specifically as follows: Extracting corresponding video content characteristics of each data subunit based on the generated coding information in the video coding process; Performing association mapping on video content characteristics, a current link risk interval and a moving state change amplitude, and dynamically adjusting weights; Based on the weight adjustment result, comprehensively characterizing the video content characteristics of each data subunit through weighted characteristic fusion to form an importance characterization value; sequencing all the data subunits according to the importance characterization value to obtain a differentiated importance assessment result; and marking the data subunits with importance higher than a preset distinguishing condition as key data subunits and marking the rest data subunits as common data subunits according to the importance evaluation result.
7. A system using the video stable transmission method in a high-speed moving scene according to any one of claims 1-6, characterized in that it comprises a decision module, an interval module, an instance module and a transmission module, and there is a connection between the modules; The judging module is used for acquiring the moving state data of the video transmitting end and judging whether the video transmitting end enters a high-speed moving transmission state or not; The interval module is used for acquiring current network link state data after entering a high-speed mobile transmission state and determining a corresponding link risk interval; the instance module is used for generating a corresponding transmission control instance according to the link risk interval; And the transmission module is used for carrying out structural redundancy construction on the video data according to the transmission control example and completing video transmission.
8. An electronic device, the electronic device comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform a video stabilization transmission method in a high-speed moving scenario according to any one of claims 1 to 7.

Description

Video stable transmission method and system under high-speed moving scene and electronic equipment Technical Field The invention relates to the technical field of video transmission and communication, in particular to a video stable transmission method, a system and electronic equipment in a high-speed mobile scene. Background Along with the wide application of high-speed mobile equipment such as vehicle-mounted terminals, unmanned aerial vehicles, rail transit and the like, the stability and reliability of video transmission in a high-speed mobile scene become technical problems to be solved urgently. The traditional video transmission method is mostly dependent on fixed transmission parameters or based on simple adjustment of instantaneous network states, and is difficult to cope with the problems of rapid fluctuation of links, increase of packet loss rate, key frame loss and the like in the high-speed moving process, so that the phenomenon of video blocking, screen display and even interruption is caused. Meanwhile, the prior art lacks prospective and cross-layer cooperative capability in terms of mobile state judgment, link risk assessment and redundancy strategy design, cannot effectively guarantee the transmission safety of key video data, and limits continuous playing and user experience of high-definition videos in a complex mobile environment. Therefore, a method capable of sensing the movement state in real time, dynamically evaluating the link risk, and realizing stable video transmission through the cross-layer collaboration and the structured redundancy mechanism is needed. For example, the invention patent publication No. CN116095362A discloses a video encoding method, a video decoding method, a video transmission method, an electronic device and a computer storage medium. The method comprises the steps of obtaining a video to be transmitted, obtaining video characteristics and network state information of the video to be transmitted, calculating redundancy of the video to be transmitted according to the video characteristics and the network state information, obtaining a packet loss rate, judging whether the redundancy is smaller than or equal to the packet loss rate, and if not, encoding the video to be transmitted according to the redundancy to obtain an encoded video code stream. By adopting the mode, the video data is transmitted by adopting the forward error correction suitable for redundancy in combination with the video characteristics and the network condition, the stability of video transmission is improved, and the problem that video clamping is easy to cause when the video transmission in the prior art is in a scene with large network fluctuation is solved. The invention patent with the bulletin number of CN111107440B discloses a video transmission control method, a device, equipment and a computer readable storage medium, and the method comprises the steps of acquiring state data of a transmitted video frame in the process that a transmitting end transmits video to a receiving end, wherein the state data are used for describing the transmitting and receiving states of the transmitted video frame, predicting a code rate value which is adapted to the network state of the receiving end according to the state data, controlling the transmitting end to transmit the video frame which responds to an operation instruction of the receiving end according to the code rate value, enabling the receiving end to acquire a video frame picture which responds to the operation instruction in real time, and iteratively executing the prediction of the code rate value and controlling the transmitting end to transmit the video frame which responds to the operation instruction of the receiving end according to the predicted code rate value until the video transmission is stopped through the continuously acquired state data. The technical scheme of the embodiment can enable the client to not have the situation that the game picture is blocked. In the above disclosed technical solution, at least the following technical problems exist: In the traditional video transmission scheme, a single-layer or weak cross-layer control strategy is mostly adopted, effective coordination is lacking among coding, transmission and application layers, the control parameter updating period is long, the adaptability is poor, the transmission strategy is difficult to adjust integrally in time under the high-speed moving condition, the unified redundancy or fixed error correction strategy is usually adopted in the aspect of packet loss response, the importance and link risk difference of video content are not distinguished, and bandwidth resource waste or insufficient protection of key video information are easily caused. The present invention proposes a solution to the above-mentioned problems. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides a video stable trans