Methods and circuits for synchronizing streaming data and systems using the same
US6356871B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Jun 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4305
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for synchronizing stream processing with a locally generated system time clock is disclosed. A program clock reference is recovered from a transport layer and used to vary the frequency of the locally generated system time clock. A presentation time stamp is recovered from a packetized elementary stream derived from the transport layer. The relationship between a reference sample associated with the presentation time stamp from the packetized elementary stream and a current sample being streamed is determined relative to the system time clock. Data samples are added or subtracted from a stream of data samples being streamed in response to the step of determining to establish a relationship between the stream of samples and the presentation time stamp relative to the system time clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.