Adaptive comb filter that cancels hugand cross-luminance errors
US5870153A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A comb filter for use in a video decoder is described. The comb filter includes a line memory for storing as successive pairs of U and V samples of a decoded video signal corresponding to a previous horizontal line of video information and a line memory for storing a second previous horizontal line of video information. The filter also includes a circuit to calculate an average value of both U and V from a previous sample and a corresponding sample from a previous line. The filter also includes a circuit for calculating a correction term for each one of the averages. The correction term is calculated from the opposite color component as was used to calculate the average value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.