Single Video Multi-Audio Monitoring via SSRC Segmentation
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Solution Overview
Problem
Current video monitoring systems with single-channel video and single-channel audio are inadequate for scenarios requiring real-time remote capture and playback of multiple audio channels, as they cannot effectively coordinate single-channel video with multiple audio channels.
Innovation Solution
The system allocates a fixed initial SSRC value for each audio channel, establishes an RTSP interaction mode between the client and device ends, generates modified SSRC values for RTP packets, and distinguishes video from audio using PT values, allowing users to select and play specific audio and video channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If analog video capturing points of a single channel correspond to one channel of audio, then the system structure is simple, but the system cannot satisfy the application requirements of single channel of video coordinating with multiple channels of audio
Solution Approach 1:
The patent segments the audio channel identification by allocating a fixed initial SSRC value for each audio channel and generating modified SSRC values through XOR operation. This segmentation allows the system to handle multiple audio channels independently while maintaining a unified video channel, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent changes the SSRC parameter in RTP packets through XOR operation with a channel identifier. By modifying this parameter dynamically based on the audio channel being transmitted, the system achieves multi-channel audio coordination with a single video channel without significantly increasing structural complexity.
2Adaptability or versatility
If multiple parallel media streams are set up for different audio channels, then the system can support multiple audio channels, but the protocol complexity and resource consumption increase
Solution Approach 1:
The patent merges multiple audio channels into a single RTP stream by using PT values to distinguish video from audio and modified SSRC values to identify specific audio channels. This consolidation approach allows multiple audio channels to be transmitted through one video monitoring channel, reducing protocol complexity while maintaining multi-channel support.
Solution Approach 2:
The patent introduces modified SSRC values as an intermediary mechanism to identify different audio channels within a unified RTP stream. This intermediary parameter enables the system to distinguish and handle multiple audio channels without requiring separate parallel media streams, thereby reducing protocol complexity.
3Ease of operation
If audio and video signals are synthesized into a combined data stream with one-to-one correspondence, then the processing is simple, but the system cannot enable users to select freely a video and/or audio of a corresponding channel to play
Solution Approach 1:
The patent uses PT values as identifiers to distinguish video from audio streams and modified SSRC values to identify specific audio channels. These identifier parameters act like 'colors' that allow users to easily select and play specific channels while the system preserves all channel information through the encoding process.
Data Source
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AI summary
The present invention provides a method and system for monitoring video with single channel of video and multiple channels of audio. The method comprises: allocating a fixed initial SSRC value for each channel of audio by a device end; establishing an RTSP interaction mode between a client end and the device end; the client end requesting, from the device end, single channel of video and multiple channels of audio, the device end randomly generating, for each channel of audio, a corresponding modified SSRC value, and sending the same to the client end; the device end capturing the single channel of video and the multiple channels of audio and sending an RTP packet of the single channel of video to the client end, and modifying the initial SSRC value in the RTP packet of each channel of audio to the corresponding modified SSRC value, then sending the RTP packet of each channel of audio containing the modified SSRC value to the client end; the client end distinguishing individual channels of audio according to the modified SSRC values in the RTP packets of the multiple channels of audio, and playing the video and/or the audio of a corresponding channel according to user's demands. The present invention fulfills to audio-video capturing of multiple channels of audio and single channel of video and enables a user to select freely a video and/or audio of a corresponding channel to play.