Error resilient video transmission using instantaneous receiver feedback and channel quality adaptive packet retransmission
US8265171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jul 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for delivering real-time video imagery to a receiver over a channel. A current video frame is captured and digitized. The digitized frame is divided into a plurality of macroblocks. For each macroblock an intra, inter or skip mode coding mode is determined. Based on instantaneous feedback received from a receiver regarding successfully received video packets for a prior video frame, a quantization parameter is set and the macroblocks are encoded in accordance with their respective selected coding mode. Synchronized error concealment is performed at both the encoder and decoder sides of the system and retransmission of lost video packets, using an adaptive retransmission scheme, are performed in accordance with the instantaneous feedback from the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.