Method and device for compressing digital data
US5768534A · kind A · utility
10Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Dec 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data compression device having a decorrelation circuit (10), a circuit (12) for quantizing the decorrelated data and a control circuit (13) acting on the quantization step. The device includes is a circuit for calculating a histogram of the decorrelated data and for calculating the quantization step on the basis of this histogram (11) in order to force, in accordance with the coherence of the histogram, this quantization step. The latter is calculated on the basis of the distances between the local maximum values of the histogram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.