Video signal transmission system and method
US5410351A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1992 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Jul 29, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a video signal transmission system in which input video signals are high efficiency coded for transmitting, the high efficiency coded data are decoded with quantization information determined for each block group by the amount of the data remaining in the buffer memory. The decoded data are compared with the original video data to determine the difference data. The difference data are weighted with a flatness value which defines the degree of perceivability of the distortion. The quantization size for the video data to be transmitted actually is determined based on the difference data or the weighted difference data so that the quality of the picture to be transmitted can be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.