Method and apparatus for expanding audio data
US7233832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Apr 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems implementing the invention allow a user to time stretch an audio track without changing the pitch of the sound, and to produce optimal audible qualities of the output signal. The approach utilized in the invention relies on providing several time stretching methods, each one of which is selected based on one or more criteria of the audio data properties. One method relies on crossfading pairs of segments of audio data while running one segment backward every other repetition. The second time stretching method detects inaudible segments and inserts longer periods of audible data within those segments. The third method utilizes a reverb to create a reverb segment that is played after the original segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.