Method and apparatus to synchronize audio and video
US7692724B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Feb 4, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus to synchronize an audio signal and a video signal. The method includes: displaying video on a screen that corresponds to an audio signal including a high frequency component having a predetermined pattern inserted therein to indicate when a scene change occurs in a video signal, detecting a scene change in the displayed video and detecting the high frequency component having the predetermined pattern in the audio signal, calculating a time difference between a time when the scene change is detected in the displayed video and a time when the high frequency component having the predetermined pattern is detected in the audio signal, and controlling delay times of the audio signal and the video signal according to the calculated time difference. Accordingly, the audio signal and the video signal can be automatically synchronized without performing a separate measuring operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.