Video Stream Segmentation for Backward Compatibility
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Solution Overview
Problem
Current digital television systems face challenges in processing and transmitting 1080P-60 video signals, as legacy 1080i-60 receivers are unable to handle the increased data requirements, leading to inefficient channel consumption and inability to render superior picture quality.
Innovation Solution
The solution involves encoding 1080P-60 video into two separate streams with unique PID values, allowing 1080P-60 capable receivers to process the full signal while legacy 1080i-60 receivers can decode an equivalent 1080P-30 signal by rejecting the second stream, thereby optimizing channel usage and maintaining backward compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If 1080P-60 video is transmitted as a single stream, then superior picture quality is achieved for 1080P-60 receivers, but legacy 1080i-60 receivers cannot process the signal
Solution Approach 1:
The 1080P-60 video stream is divided into two separate streams: a first stream containing pictures at even intervals and a second stream containing pictures at odd intervals. Each stream is assigned a unique PID value. This segmentation allows legacy receivers to process one stream as 1080P-30 while advanced receivers can combine both streams to achieve full 1080P-60 picture quality.
2Adaptability or versatility
If dual carrying channels are used to support both 1080P-60 and 1080i-60, then both receiver types can be served, but channel consumption triples
Solution Approach 1:
Two separate video streams (first stream with even pictures, second stream with odd pictures) are merged into a single transmission channel by multiplexing them together with unique PID values. This allows both 1080P-60 and 1080i-60 compatibility to be achieved while consuming only one channel, reducing channel consumption from triple to single.
3Quantity of substance
If 1080P-60 signal is transmitted, then picture data volume doubles compared to 1080i-60, but legacy receivers lack processing capability
Solution Approach 1:
The high-volume 1080P-60 picture data is segmented into two separate streams with unique PID values, where each stream contains half the picture data (even or odd intervals). This reduces the processing burden on legacy receivers, allowing them to handle one stream as 1080P-30, while advanced receivers can process both streams to achieve full 1080P-60 quality.
Data Source
AI summary
Methods and systems for the efficient and non-redundant transmission of a single video program in multiple frame rates, optionally employing a combination of video coding standards, in a way that is backwards-compatible with legacy receivers only supportive of some subsection of frame rates or of some subsection of video coding standards.