Error control apparatus for a digital video signal processing system
US5268961A · kind A · utility
19Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Aug 20, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a system for coding and decoding a digital television signal, a signal representing residual image information is transformed into plural subband signals representing vertical and horizontal frequencies, and quantized. To mitigate the effects of transmission channel errors, the quantized subband signals are scrambled by line shuffling before being data compressed prior to transmission. Inverse operations including decoding, line re-shuffling, dequantization and subband synthesis occur at a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.