Image filtering system performing transform coding of image data other than boundary picture elements of adjoining blocks
US5173952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Mar 20, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image filtering system includes a storage device for storing image data which are partitioned into blocks composed of a predetermined number of picture elements for an orthogonal transform and represent an entire input image therein, an address selecting device for selecting addresses of the storage device, from which image data corresponding to respective predetermined object regions of a frame and stored at the selected addresses are read, and a sum-of-products calculating device for multiplying each of the image data of picture elements read out of the storage device by a corresponding coefficient of an operator, which is comprised of a predetermined number of coefficients, for adding up the thus obtained products for each of the object regions and for outputting a sum signal representing a sum of the products for each of the object regions. In the image filtering system, the address selecting device selects the addresses such that a storage area of the storage device corresponding to each of the object regions does not spread over adjoining ones of the blocks. Thereby, there is prevented occurrence of a block noise originating from a block in which motion compensation is not…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.