Dual Transport Stream Multiplexing with H.264 Turbo Streams
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Solution Overview
Problem
Conventional digital broadcasting systems using dual transport streams with MPEG-2 compression for both normal and turbo streams face decreased compression performance and image quality, leading to increased load on transmission systems and operating expenses.
Innovation Solution
A digital broadcasting transmitter that compresses normal streams in the MPEG-2 format and turbo streams in the H.264 format, using RS encoding, interleaving, and multiplexing to form a dual transport stream, which is then robustly processed for improved transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If MPEG-2 compression format is used for both normal stream and turbo stream, then the transmission system is simple to implement, but the compression performance and image quality are considerably decreased
Solution Approach 1:
The patent applies different compression formats to different stream types: MPEG-2 for normal streams and H.264 for turbo streams. This local differentiation allows each stream to use the most appropriate compression format for its specific requirements, improving overall compression performance while maintaining implementation feasibility through standardized formats.
Solution Approach 2:
The patent changes the compression format parameter from a uniform MPEG-2 approach to a differentiated approach using H.264 for turbo streams. This parameter change enables better compression ratios and image quality for turbo streams while maintaining backward compatibility for normal streams.
2Ease of manufacture
If MPEG-2 compression format is used for both normal stream and turbo stream, then the transmission system is simple to implement, but the load on transmission system and operating expenses are increased
Solution Approach 1:
The patent changes the compression efficiency parameter by introducing H.264 for turbo streams, which provides better compression ratios. This reduces the amount of data that needs to be transmitted, thereby reducing transmission load and energy consumption while maintaining implementation simplicity through standardized formats.
3Adaptability or versatility
If dual transport stream with enhanced coding is added, then the broadcasting capability is improved, but the compression performance and image quality are considerably decreased
Solution Approach 1:
The patent applies H.264 compression specifically to turbo streams while maintaining MPEG-2 for normal streams. This local quality enhancement allows the turbo stream to achieve superior image quality and compression performance, enabling enhanced broadcasting capabilities without compromising overall system performance.
Data Source
AI summary
A digital broadcasting transmitter, a turbo stream processing method thereof, and a digital broadcasting system having the same. The digital broadcasting transmitter includes a first compressor, forming a normal stream by compressing audio and video signals in a first compression format, a second compressor, forming a turbo stream by compressing the audio and video signals in a second compression format, a transport stream (TS) constructor, compressing the turbo stream in an H.264 format and forming the dual transfer stream by multiplexing the normal stream and the turbo stream, and a TS processor, robustly processing the dual transfer stream transmitted from the TS constructor, thus enhancing the transmission efficiency.