Digital audio with parameters for real-time time scaling
US7171367B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2001 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Jun 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/10944
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Preprocessing audio data to generate parameters associated with time scaling reduces the processing power required for real-time time scaling of the audio data. An augmented audio data structure includes the audio data and the parameters. The parameters for a frame of the audio data can identify best match blocks for time scaling or represent a plot of offset versus time scale that can be interpolated to determine an offset. The real-time time scaling uses the blocks that the parameters identify instead of performing a search for the best matching blocks. The parameters can also indicate which of the frames represent silence and can be scaled differently from frames that do not represent silence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.