System and method for digital multimedia stream conversion
US7116894B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2002 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Oct 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for converting a program stream to a transport stream is described comprising: reading program stream packets from a digital versatile disk (“DVD”) based on user selections and navigation metadata contained on the DVD; extracting audio and video content packetized within the program stream packets; reading system clock reference (“SCR”) timestamps from the program stream packets, the SCR timestamps indicating relative times at which the audio and video should be rendered; determining a point within consecutively read program stream packets at which the SCR timestamps are non-consecutive; converting the SCR timestamps to program clock reference (“PCR”) timestamps interpretable by a transport stream decoder; and generating a transport stream of transport stream packets containing the audio and video content and using the PCR timestamps to provide for decode timing at the transport stream decoder; and generating a resynchronization signal causing the transport stream decoder to resynchronize with the transport stream when it receives corresponding non-consecutive PCR timestamps associated with the non-consecutive SCR timestamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.