Digital Receiver Transport Stream Storage and Reproduction
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Solution Overview
Problem
Existing digital multimedia broadcast (DMB) receivers face compatibility issues and difficulties in rate control due to the lack of standardization in storing and reproducing transport streams, which are not compatible with other personal video recorder (PVR) systems, especially in mobile reception scenarios.
Innovation Solution
A method and apparatus that allow for the selection of storage and reproduction of transport streams as packetized elementary streams (PES), program streams (PS), or transport streams (TS), involving transcoding and demultiplexing processes to ensure compatibility and efficient rate control, using a digital receiver structure that includes DEMUX, PS MUX, and a storing medium to manage different stream types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the general PVR stores PES with additional local time information, then rate control is achieved, but compatibility with other PVR receivers is lost
Solution Approach 1:
The patent enables the PVR system to store transport streams in multiple formats (PES, PS, TS) and selectively reproduce them based on requirements. The storing medium stores streams in different packet structures, allowing the system to function both as a standard-compliant device and as a device with enhanced rate control capabilities through PS format storage.
Solution Approach 2:
The patent changes the packet structure parameters from standard PES to PS (Program Stream) format, which includes different packetization methods and timing information structures. This parameter change enables better rate control while maintaining compatibility through selective reproduction formats.
2Ease of operation
If the PVR stores TS as PES with demultiplexing, then stream processing is simplified, but storage flexibility and compatibility are reduced
Solution Approach 1:
The patent implements a dynamic storage system where the PVR can select different storage formats (PES, PS, or TS) based on operational requirements. The system dynamically adapts between simplified processing (PES) and flexible storage (PS/TS) modes, allowing ease of operation when needed while maintaining storage flexibility for other scenarios.
3Reliability
If additional time information is stored with the stream, then rate control is improved, but device complexity increases
Solution Approach 1:
The patent extracts timing information from the standard PES structure and reorganizes it into the PS format structure. By taking out the time synchronization information and integrating it into the program stream packet structure, the system achieves rate control without adding separate additional information fields, thus reducing overall complexity.
Data Source
AI summary
A method and apparatus for storing/reproducing a transport stream and a digital receiver using the same are disclosed. The method for storing the transport stream includes the steps of receiving a TS, selecting a storing stream type for the TS, and transcoding the TS into a PES or PS according to the selected stream type and storing the transcoded stream, or storing the TS as it is. Accordingly, the structure for storing the PS or TS overcomes incompatibility of the stored stream and difficulty in the rate control at the time of reproduction in the general PVR.