Unidirectional Audio-Video Synchronization Control
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Solution Overview
Problem
Current network protocols, such as 3GPP TS26.114, lack the ability to disable audio-video synchronization in only one direction of bi-directional communication while maintaining synchronization in the opposite direction, which is necessary for scenarios like voice-over-IP applications where alternative video clips are sent with audio communication.
Innovation Solution
A synchronization command is defined for packet-based network protocols that allows devices to disable audio-video synchronization in a unidirectional manner by sending and receiving commands to control synchronization in either the sending or receiving direction, enabling devices to send unsynchronized audio and video information in one direction while maintaining synchronization in the other direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If audio-video synchronization is disabled in both directions to allow alternative video clips, then flexibility in video content is improved, but audio-video synchronization capability is lost in the receive path
Solution Approach 1:
The patent segments the audio-video synchronization control into separate directional controls. Instead of a single global synchronization setting, the system divides control into send-path synchronization and receive-path synchronization, allowing independent configuration of each direction. This enables alternative video clips in the send path while maintaining synchronization in the receive path.
Solution Approach 2:
The patent applies local quality by allowing different synchronization characteristics in different directions of communication. The send path can be configured with unsynchronized audio-video streams for alternative video clips, while the receive path maintains synchronized streams for proper audio-video telephony functionality. Each direction has its own synchronization properties tailored to its specific requirements.
2Adaptability or versatility
If a synchronization command is added to control unidirectional disabling, then control flexibility is improved, but device complexity increases
Solution Approach 1:
The synchronization command is designed with multi-functionality to handle both unidirectional and bidirectional synchronization control. A single command structure can disable synchronization in the send path, receive path, or both directions, eliminating the need for multiple separate commands. This universal command approach reduces protocol complexity while maintaining control flexibility.
Solution Approach 2:
The patent implements synchronization control by changing parameters within existing protocol frameworks. The synchronization command modifies synchronization state parameters (enabled/disabled) and directional parameters (send/receive paths) rather than introducing fundamentally new protocol mechanisms. This parameter-based approach maintains compatibility with existing protocols while adding unidirectional control capability.
Data Source
AI summary
This disclosure describes techniques to allow for unidirectional disabling of audio-video synchronization. In particular, a synchronization command is defined for packet-based network protocols. The synchronization command can disable audio-video synchronization in a sending direction, a receiving direction, or both the sending and receiving direction. In this way, devices are given more control over audio-video synchronization, and can disable such synchronization in a unidirectional manner only, while maintaining synchronization in the opposite direction.