Adaptive video encoding using a perceptual model
US8422546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2005 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Apr 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video encoder includes a region detector module that classifies blocks of video frames. An adaptive filter module applies a median filter to a block based upon a block classification assigned by the region detector module. An adaptive quantization module quantizes a block according to a quantization method adaptively determined based upon a block classification assigned by the region detection module. In one example, a video encoder adaptively determines a median filter selected using a block classification. In another example, a video encoder adaptively determines whether to drop an isolated last transform coefficient based on the block classification, and/or applies a dead-zone selected using the block classification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.