Method and apparatus for audible fast-forward or reverse of compressed audio content
US6721710B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2000 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for performing audible fast-forward or reverse of audio content represented in a compressed format, such as, but not limited to, MPEG-1 Layer 3 (MP3) or MPEG-2 Advance Audio Coding (AAC) employs a fast-forward controller which performs fast-forward or reverse by repeatedly skipping forward or reverse in the compressed audio data stream, retrieving a block of data, and then splicing these data blocks back together. A decoder is then used to decode each of these blocks, to detect when a block switch has occurred (a splice in the data stream), and to quickly resynchronize at each transition. Hierarchical or multiplexed data streams may be decoded using a cascade of decoders each employing this technique. The decoder uses a robust sync search for performing resynchronization and error recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.