Picture data compressing and recording apparatus for recording components of the picture independently
US5068744A · kind A · utility
61Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Sep 14, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2101/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A picture data compressing and recording apparatus divides picture data into blocks and applies two-dimensional orthogonal transformation to the blocks of picture data. The apparatus records DC components and AC components of the transformed data collectively yet, independently of each other in a recording medium. The apparatus is capable of reproducing a simplified picture by reading out the DC component only. The apparatus is also capable of recording a luminance signal Y and chrominance signals Cr and Cb independently of each other and reading out the luminance signal Y only so as to reproduce a black-and-white picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.