Multichannel audio-video synchronized playing processing method
A technology of audio and video synchronization and processing method, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as poor performance and playback effect, different time distribution of audio and video, asynchronous audio and video data, etc. To achieve the effect of improving the final experience, improving the playback effect, and improving the playback effect
A technology of audio and video synchronization and processing method, applied in image communication, selective content distribution, electrical components, etc., can solve problems such as poor performance and playback effect, different time distribution of audio and video, asynchronous audio and video data, etc. To achieve the effect of improving the final experience, improving the playback effect, and improving the playback effect
CN104378675AActive Publication Date: 2015-02-25XIAMEN YAXON NETWORKS CO LTD
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[0022] The present invention will be further described in conjunction with specific embodiments.
[0023] refer to figure 1 , figure 2 and image 3 , the multi-channel audio-video synchronous playback processing method of the present invention, its processing comprises the following steps:
[0024] (1) Set the audio and video data corresponding to each audio and video channel based on the time stamp T of the same reference clock to mark the axis T 1 -T n seconds, n is a natural number;
[0025] (2), video channel data processing, its processing includes, a, establish a mark axis T based on time stamp T for each video channel 1 -T n A two-way linked list T of frames arranged in seconds 1 '-T n ', n is a natural number, the two-way frame linked list can carry out bidirectional traversal of nodes, the two-way frame linked list T 1 '-T n ′ for every node T n ' represents the relative starting time T n Nodes with a second time period, each node T n 'Divided into F fra...
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The invention relates to the field of video monitoring, and provides a multichannel audio-video synchronized playing processing method capable of quickly processing multichannel audio-video streams and realizing multichannel audio-video synchronized playing control. The method includes the following steps: establishing a timestamp mark axis T1-Tn seconds taking a common reference timestamp T as the relative origin; establishing a frame channel composed of a bidirectional frame chain table and a data stream buffer queue for processing video channel data; establishing a frame channel composed of a bidirectional frame chain table and a data stream buffer queue for processing audio channel data; performing multichannel audio-video synchronized playing control, calculating relative starting play time T1 and end time Tn of all the frame channels, adjusting reference time and frame numbers of all the frame channels, filling empty frames, enabling data of each frame channel to start from the same reference time point T1 and end at the reference time Tn, when data are available in the current frame of all the frame channels, playing the current frame, moving to a next frame waiting for playing, and controlling frame-by-frame synchronized playing.
Description
technical field [0001] The invention relates to the field of video monitoring, in particular to a multi-channel audio and video synchronous playback processing method. Background technique [0002] At present, in traditional remote vehicle-mounted video terminals, audio collection and video collection are completed by different hardware devices, so audio data and video data are separated in storage and transmission. This requires that the monitoring center must perform synchronous control of audio and video playback when performing video surveillance presentations. The method used in the prior art is to stamp each video and audio data packet with a time stamp, and control the playback time and speed of the audio and video through the time stamp to achieve time synchronization. This method is the most commonly used method, and it is fully capable of meeting daily needs in the case of single-channel video and audio. However, with the continuous upgrading of wireless network ...
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Patent Timeline
25 Feb 2015
Publication
CN104378675A
- IPC
- H04N21/43; H04N21/8547
- CPC
- H04N21/4307; H04N21/8547
- Inventors
- 王国清; 林文山