System and method for transmission of video signals using multiple channels
US7551671B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2003 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jun 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/631
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a communication network (20), a video encoder/decoder system (114) and an encoding method (150) facilitate transmission of video frames (116) over multiple low-data-rate channels (46). Frame data (204) is generated for each video frame (116). The frame data (204) is transformed (172) to obtain transform coefficients (212), which are assembled (174) into quadtrees (216) and separately coded (178). In addition, motion vectors (166) are split into coding blocks (188) and separately coded (190). The quadtrees (126) and the motion vectors (166) are independently distributed among the multiple channels (46) for transmission. A decoding method (360) facilitates error resilient reception of transform coefficient packets (222) and motion vector packets (244) so that lost transform coefficients (374) and/or lost motion vectors (384) can be estimated at a receiving video encoder/decoder system (114) to reconstruct a received video frames 144.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.