Method and apparatus for skipping and repeating audio frames
US6680753B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2001 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | May 2, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4305
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of synchronizing audio frame presentation time with a system time in an MPEG audio bit-stream decoder is provided. The method includes identifying a time disparity between an audio frame presentation time and a system time. A group of successive audio frames in the MPEG audio bit stream are then examined for an audio frame having an amplitude value less than a threshold value. An audio frame is selected from the examined bit stream for skipping or repeating. If an audio frame below the threshold value is identified, it is selected, otherwise the last frame in the group of frames is selected. The selected frame is then skipped or repeated to synchronize the audio presentation time to the system time in order to minimize the effect of audio artifacts on the listener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.