Prioritized retransmission of internet protocol television (IPTV) packets
US8806551B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2008 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | May 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6375
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for improved error resiliency in Internet protocol Television (IPTV) are provided. Received media stream is encoded in a real-time protocol. The RTP media stream is then reordered in a homogeneous arrangement (e.g., video packets together, audio packets together) such that each RTP packet, which contains video contains data from a single video frame. Furthermore, each RTP packet contains a RTP header extension, which specifies the priority of the data. Audio frame and intra-coded frames (I-frames) are marked as highest priority frames, predictably coded frames (P-frames) are marked as high priority frames, bidirectionally coded frames (B-frames) are marked as lower priority frames with anything else occupying the lowest priority. The media stream is forwarded to the plurality of users, in accordance with the priority of each packet. A subscriber's device requests retransmission of any missing packets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.