Image processing apparatus and method
US5444542A · kind A · utility
3Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Jan 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus is provided for quantizing data obtained by transforming image data to a frequency zone so as to encode it. The speed at which such an apparatus performs processing is increased. Data is quantized on the basis of a plurality of coefficients C.sub.1 for controlling a quantizing step. As a result of the quantization, reference encoding data items Nb1 to Nb4 are obtained. Coefficients C5 to C7 for controlling the quantizing step are generated when image data which is delayed by one frame is quantized. At this time, the data items Nb1 to Nb4 are output by bit-shifting the result of the quantization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.