AV synchronization system
US7812886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Aug 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4341
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In synchronization of a conventional AV system, when a stream as the master stops, a system clock cannot be corrected for synchronization. Since the correction is consistently performed even when an error is small, overhead of correction is large. On the other hand, when an error is large, sharp correction causes a feeling that something wrong. In the present invention, when the stream as the master stops, previously registering the degree of priority regarding the master, consideration of a corrected period or a previous error for the system clock, or transmitting a stream containing information regarding the master can allow for other process to serves as the master. Accordingly, it is possible to provide a method for synchronization with maintaining correction of the system clock. When a corrected error is large, gradual correction or reference can provide a system with normal feeling. Furthermore, when an error of correction is small, omission of correction or reference can provide a system with less overhead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.