Adaptive-block-length, adaptive-transforn, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio
US5394473A · kind A · utility
408Cited by
3References
65Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1991 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Dec 11, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates in general to high-quality low bit-rate digital transform coding and decoding of information corresponding to audio signals such as music signals. More particularly, the invention relates to signal analysis/synthesis in coding and decoding. The invention can optimize the trade off in transform coders between time resolution and frequency resolution by adaptively selecting the transform block length for each sampled audio segment, and/or can optimize coding gain by adaptively selecting the transform and/or by adaptively selecting the analysis window or the analysis/synthesis window pair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.