Video communication method having refresh function of coding sequence and terminal devices thereof
US5528284A · kind A · utility
162Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Feb 10, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a video communication system including a sending terminal and a receiving terminal connected via a packet switching network, a receiving terminal which has detected loss of a video packet sets a video output into a freeze status and transmits a refresh request command to the sending terminal. Upon receiving the refresh request command, the sending terminal requests a video coder unit to execute refreshing and transmits a series of video packets beginning from an INTRA frame. Upon receiving a packet of the INTRA frame, the receiving terminal releases the freeze status and restarts video information decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.