Data compression methods and systems with quantization distortion measurement means
US5506623A · kind A · utility
15Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1995 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Apr 4, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data transmission system, permits data transmission without failure while ensuring a substantially constant picture quality or audio quality irrespective of the source of data. The data transmission system transmits data after conversion thereof into digital data and compression of the same. In the system, the distortion in data to be transmitted is measured, and the quantization step size is controlled according to the measured distortion to hold the distortion constant, thus permitting data transmission while maintaining constant quality of the transmitted data irrespective of the data source kind.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.