Logical Frame Access Unit Tables for Low Bandwidth Video Synchronization
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Solution Overview
Problem
Existing transmission capabilities, such as DRM, are not designed to efficiently transmit video content due to bandwidth limitations, resulting in significant time delays when switching between programs, which hinders quick synchronization of video content.
Innovation Solution
An apparatus and method that prepare and transmit access unit streams by generating a sequence of logical frames with access unit tables, allowing for quick synchronization by inserting consecutive access units into the useful data section and using pointers to locate access units efficiently, even at low bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If video content is transmitted via DRM with low bandwidth, then bandwidth consumption is reduced, but synchronization time increases significantly
Solution Approach 1:
The patent applies preliminary action by embedding access unit tables and pointers in advance within the transmission stream. These pointers pre-indicate the locations of video data packets, allowing the receiver to immediately locate and synchronize to video content without scanning through the entire low-bandwidth DRM stream, thus resolving the contradiction between low bandwidth consumption and fast synchronization capability
2Measurement precision
If access units are inserted into logical frames with access unit tables, then location precision of video data is improved, but data structure complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the transmission data into logical frames with embedded access unit tables. Each table segment contains pointers to specific access units, breaking down the complex task of locating video data into manageable segments. This segmentation achieves high location precision while keeping each individual table segment relatively simple in structure
Data Source
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AI summary
A transmission signal having a sequence of logical frames embed therein, is constructed such that each logical frame comprises a useful data section, wherein consecutive access units of an access unit stream are consecutively inserted into the useful data section of the sequence of logical frames, wherein each logical frame (20) into which a begin (32) of an access unit (28) falls, comprises an access unit table (30) comprising, per begin (32) of the access units falling into the respective logical frame (20), a pointer (40) pointing thereto.