MPEG TS to PS Conversion via Constrained Multiplexing Units
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Solution Overview
Problem
Current DVD logic standards require complex and time-consuming MPEG_TS to MPEG_PS conversion, leading to degraded image and sound quality due to recalculation and re-encoding processes.
Innovation Solution
A data recording medium and apparatus that allows for fast and simple conversion by multiplexing video and audio streams in a constrained format, where a predetermined number of packets are grouped as a multiplexing unit, enabling direct conversion without recalculating timestamp information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MPEG_TS to MPEG_PS conversion is performed using current DVD logic standards, then content can be converted to DVD-Video format, but the conversion process becomes complex and time-consuming with degraded image and sound quality
Solution Approach 1:
The patent applies preliminary action by pre-configuring the multiplexing unit structure during the recording phase. The system stream is recorded with a predetermined number of packets (multiplexing unit) that are already organized in a way that facilitates direct conversion to MPEG_PS without requiring complex recalculation of timestamp information during the conversion phase.
Solution Approach 2:
The patent changes the parameter of packet organization by introducing a constrained format where a predetermined number of TS packets are grouped into a multiplexing unit. This structural parameter change enables the conversion process to simply repackage packets rather than performing complex recalculation, thereby reducing conversion complexity while maintaining adaptability.
2Adaptability or versatility
If MPEG_TS to MPEG_PS conversion is performed using current DVD logic standards, then content can be converted to DVD-Video format, but the conversion process becomes time-consuming
Solution Approach 1:
The system performs preliminary organization of TS packets into multiplexing units during recording, with each unit containing a predetermined number of packets. This pre-organization eliminates the need for time-consuming recalculation during conversion, as the packet structure is already prepared for direct transformation to MPEG_PS format.
Solution Approach 2:
The patent segments the TS stream into discrete multiplexing units with predetermined packet counts. This segmentation allows the conversion process to handle each unit independently and efficiently, avoiding the need to process the entire stream through complex recalculation, thereby significantly reducing overall conversion time.
3Adaptability or versatility
If MPEG_TS to MPEG_PS conversion is performed using current DVD logic standards, then content can be converted to DVD-Video format, but re-encoding is required resulting in degraded image and sound quality
Solution Approach 1:
The patent extracts the essential conversion function by removing the unnecessary re-encoding step. Through the constrained format with predetermined multiplexing units, the system can directly transform TS packets to MPEG_PS packets by simply repackaging and adjusting timestamps, thereby extracting the conversion capability while eliminating the harmful re-encoding process that degrades quality.
Solution Approach 2:
The patent uses a copying approach where the multiplexing unit structure is copied and adapted during conversion. Instead of re-encoding the audio and video streams, the system copies the packet structures and adjusts their organization from TS format to MPEG_PS format, preserving the original image and sound quality while achieving format conversion.
Data Source
AI summary
Provided is an information recording medium which achieves high speed conversion of a signal input from external from MPEG-TS to MPEG-PS complying with DVD standard. An apparatus and a method for recording information to the information recording medium are also provided. A constrained format which enables conversion from a first stream (for example, MPEG transport stream) to a second stream (for example, MPEG program stream) is provided. The constrained format defines that a first packet (for example, TS packet) is grouped and managed in multiplexing unit. The first one (AF#8) of complete audio frames in the multiplexing unit (402) is the first one of audio frames in a payload of a second packet (for example, PES packet) (413).