Unified lossy and lossless audio compression
US7424434B2 · kind B2 · utility
7Cited by
22References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2003 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Sep 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2015/025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A unified lossy and lossless audio compression scheme combines lossy and lossless audio compression within a same audio signal. This approach employs mixed lossless coding of a transition frame between lossy and lossless coding frames to produce seamless transitions. The mixed lossless coding performs a lapped transform and inverse lapped transform to produce an appropriately windowed and folded pseudo-time domain frame, which can then be losslessly coded. The mixed lossless coding also can be applied for frames that exhibit poor lossy compression performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.