Apparatus, method and computer program product for transcoding a coded multiplexed sound and moving picture sequence
US6654421B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/234354
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Herein disclosed is an apparatus for transcoding a coded multiplexed sound and moving picture sequence comprises the rate converter, which is operated to compress only the video bit streams, which have extremely large information volume. The compression operation is carried out through the steps of (a) operating the MPEG-2 TS demultiplexer to demultiplex the input MPEG-2 transport streams into video TS, audio TS, and system information TS; (b) operating the MPEG-2 video transcoder to transcode the video TS to generate output video TS having information volume less than the video TS; (c) operating the system controller to modify or not modify part of fixed codes of the system information TS in accordance with the output MPEG-2 transport streams; (d) operating the MPEG-2 TS multiplexer to multiplex the video TS thus transcoded, the audio TS, and the eventually partly-modified or not modified system information TS into output MPEG-2 transport streams, and output the output MPEG-2 transport streams, thereby making it possible to control the output bit rate less than the input bit rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.