Television signal sub-band coder/decoder with different levels of compatibility
US5446495A · kind A · utility
28Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1993 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Feb 11, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coder comprising banks of analysis filters (26, 27) for partitioning the spatio-temporal spectrum of each television image into sub-bands. The banks of analysis filters are coupled to devices for differential coding (30.sub.i, 31.sub.i, 32.sub.i) for separately coding the signals obtained in each sub-band. The decoder comprises prediction loops (24; 25; 12, 17 . . . 20, 3, 21, 22, 23) equal in number to the number of sub-bands for reconstructing each television image transmitted by the coder portion together with its level of resolution in each of the sub-bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.