Video transcoder with spatial resolution reduction and drift compensation
US7170932B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Nov 29, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system reduces the spatial resolution of a compressed bitstream of a sequence of frames of a video signal by first decoding the frames, and storing the decoded frames in a first frame buffer. While performing the decoding, motion compensating is performed with full resolution motion vectors of the stored decoded frames. The decoded frames are then down-sampled to a reduced resolution, and stored in a second frame buffer. The reduced resolution frames are partially encoded to produce a reduced resolution compressed bitstream of the video. While performing the partial encoding, motion compensation is performed with reduced resolution motion vectors of the stored reduced resolution frames.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.