Method and apparatus for reconstruction of low frame rate video conferencing data
US6704357B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1999 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Sep 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/587
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for improving the playback quality of audio/video streams encoded for transmission using low frame rate motion compensated coding. When a transmitting system sends an audio/video stream encoded using low frame rate motion compensated waveform, a receiving system may decode and then re-encode the stream to perform a more exhaustive search for new motion vectors that were not detected by the transmitting system. The method and system further provides improved motion compensated interpolation processes that the receiving system may use in conjunction with, or separately from re-encoding of an audio/video stream to produce a better quality playback of the stream. The method and system is particularly useful for video conferencing sessions transmitted at low rates using H.263 standard, but may be useful in other scenarios as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.