Post-processing method and apparatus for use in a video signal decoding apparatus
US5852682A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1996 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Feb 1, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/86
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for post-processing a current block is used in a decoding system for decoding an encoded digital image signal. The encoded digital image signal includes a plurality of encoded blocks of quantized transform coefficients, and the current block corresponds to one of the encoded blocks having a quantized DC coefficient and a predetermined number of quantized AC coefficients, the quantized DC coefficient having been quantized based on a DC quantization step size. The method comprises the steps of: (a) calculating an average neighboring pixel value(ANV) of neighboring block pixels located along a borderline between the current block and its neighboring blocks; (b) obtaining an average current pixel value(ACV) of current block pixels located along the borderline between the current block and the neighboring blocks; and (c) adjusting pixel values of the current block pixels based on the average neighboring pixel value, the average current pixel value, and the DC quantization step size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.