Digital-signal coding by breakdown into frequency subbands and finite state vectorial quantization
US5995027A · kind A · utility
11Cited by
2References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to code a digital signal (IM), the invention combines a breakdown of the digital signal into frequency subbands and a finite state vectorial quantization of the subbands. The digital signal is analysed in a plurality of frequency subbands distributed in accordance with at least two different resolutions, and then the subbands of higher resolution are coded by finite state vectorial quantization as a function of the subbands of lower resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.