Video signal coding using sub-band coding and phase-segregated coding techniques
US5561463A · kind A · utility
12Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Sep 22, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A composite video signal is formed in which high luminance frequencies are modulated so that they occupy frequencies above the chrominance band. A sub-band coder is used to split the luminance frequency band into high and low frequencies at the coder, and an inverse sub-band coder combines the high-frequency luminance and the chrominance components. The two resultant signals are applied to a phase-segregated Weston Clean coder to provide a composite video signal, which is compatible with a conventional signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.