Dual-Stream Broadcast Transmission Using H.264 Turbo Compression
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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 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 streams based on their specific requirements: MPEG-2 is used for the normal stream where compatibility is important, while H.264 is used for the turbo stream where high compression performance and image quality are critical. This local differentiation resolves the contradiction by optimizing each stream's compression format according to its specific function.
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 significantly improved compression performance and image quality for turbo streams while maintaining MPEG-2 for normal streams, thus resolving the contradiction between ease of implementation and compression performance.
2Device complexity
If MPEG-2 compression 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 implements local quality differentiation by applying H.264 compression specifically to turbo streams where high efficiency is needed, while keeping MPEG-2 for normal streams. This selective approach reduces the overall load on the transmission system and decreases operating expenses for turbo stream transmission without requiring complete system redesign.
Solution Approach 2:
The patent changes the compression parameter for turbo streams from MPEG-2 to H.264, which provides superior compression efficiency. This parameter change reduces the bit rate required for turbo stream transmission, thereby reducing transmission system load and operating expenses while maintaining compatibility through continued use of MPEG-2 for normal streams.
3Manufacturing precision
If H.264 compression is used for turbo stream, then the compression performance and image quality are enhanced, but the device complexity is increased
Solution Approach 1:
The patent segments the compression system into two distinct paths: one using MPEG-2 for normal streams and another using H.264 for turbo streams. This segmentation allows the complex H.264 compression to be applied only where needed (turbo streams requiring high image quality) while keeping the normal stream processing simpler, thus managing device complexity while enhancing image quality for specific applications.
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.