Picture signal processor, picture signal coder and picture signal interpolator
US5028995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1988 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Oct 18, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image signal processor in which the conversion process of a picture signal is performed in block unit, not in frame unit, and in order to raise the speed of the process, besides an orthogonal transform matrix, the products between the orthogonal transform matrix and matrices for realizing picture resolution conversion, image manipulation processes such as expansion, compression and rotation, and various kinds of linear filtering are provided in a coefficient memory as new transform matrices, and these transform matrices are properly changed-over in accordance with the content of the pertinent transform, thereby to perform an orthogonal transform or an inverse orthogonal transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.