Stream Timing Update Identification for Clock Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional timeline extension methods require analyzing time T_org and time T_ref in every TEMI access unit, leading to inefficient processing due to high management and synchronization costs.
Innovation Solution
Incorporating timing update identification information to determine if the correspondence relationship between reference clocks has been updated, allowing only necessary processing when the relationship is updated, and including timing update identification information and associated times in the stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timeline extension is performed by analyzing time T_org and time T_ref in every TEMI access unit, then synchronization accuracy between reference clocks is maintained, but processing overhead and management cost increase significantly
Solution Approach 1:
The patent extracts only the essential timing information (first time and second time) and packaging it in a compact format within the stream. This allows the receiving device to obtain necessary synchronization data without processing complete TEMI access units, thereby reducing processing overhead while maintaining synchronization accuracy.
Solution Approach 2:
The correspondence relationship between reference clocks is updated in advance based on the timing update identification information before actual synchronization is needed. This preliminary update allows the receiving device to efficiently determine whether processing is necessary, reducing real-time processing overhead while ensuring accurate synchronization when required.
2Reliability
If correspondence relationship between reference clocks is updated frequently to maintain synchronization, then synchronization reliability improves, but processing time and system resource consumption increase
Solution Approach 1:
The patent implements periodic updates of the correspondence relationship between reference clocks based on timing update identification information. Instead of continuous processing, the system performs updates at appropriate intervals when changes occur, maintaining synchronization reliability while minimizing processing time and resource consumption during stable periods.
3Measurement precision
If complete time information (T_org and T_ref) is transmitted in every access unit, then synchronization precision is maintained, but data transmission volume and bandwidth consumption increase
Solution Approach 1:
The patent applies local quality by transmitting complete time information only when necessary (when timing update identification information indicates an update), and transmitting minimal or no time information when the correspondence relationship remains unchanged. This selective transmission maintains synchronization precision where needed while reducing overall data transmission volume.
Data Source
AI summary
A transmitting method according to one aspect of the present disclosure includes transmitting a first stream, the first stream including: timing update identification information id1 indicating whether or not a correspondence relationship between a first reference clock and a second reference clock has been updated, the first reference clock being used to transmit and receive the first stream, and the second reference clock being used to transmit and receive a second stream related to another content to be reproduced in synchronization with the content related to the first stream; a first time according to the first reference clock; and a second time according to the second reference clock, the second time being associated with the first time based on the updated correspondence relationship.