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Cross-node controlled online video stream selective retransmission method

A video stream, selective technology, applied in the field of selective retransmission of online video stream, can solve the problems that it is difficult to adapt to non-stationary video content channel conditions, and does not consider the joint optimization mechanism of communication nodes, etc., to achieve the effect of improving the overall reconstruction quality

Inactive Publication Date: 2011-01-05
DONGHUA UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cross-layer retransmission technology is still limited to two nodes in the communication network, and does not consider the joint optimization mechanism between more communication nodes, it is difficult to adapt to non-stationary video content and burst errors in a single video stream channel status

Method used

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  • Cross-node controlled online video stream selective retransmission method
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  • Cross-node controlled online video stream selective retransmission method

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Embodiment Construction

[0035] The present invention will be further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0036] The present invention relates to a cross-node controlled online video stream selective retransmission method, which can enhance the error control performance of the online video stream, and includes the following steps: a single video stream encoded online first enters the sending end, and the encoded frame sequence is started and transmitted according to The delay limit is divided into DFS one after another, as the basic object of s...

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Abstract

The invention relates to a cross-node controlled online video stream selective retransmission method comprising the following steps of: when an online-coded single video stream enters a transmitting end, dividing the online-coded single video stream into DFS (Delay Constraint Frame Sets) one by one according to starting and transmitting delay limitation as selective retransmission basic objects; using the transmitting end as a first communication node, determining importance levels of IP (Internet Protocol) packets in the DFS according to fault-tolerant importance measure, and supplying the selective retransmission of the IP packets by packet scheduling based on fault-tolerant importance; and on the basis of the importance levels of the IP packets, using a base station as a second communication node, and supplying the selective retransmission of a wireless link unit by a priority descending ARQ (Automatic Request for Repetition) mode. Under delay and bandwidth condition limitation, the invention organically combines priority transmission mechanisms among main communication nodes, realizes the importance division and the selective retransmission of wireless link unit levels, can strengthen the error control performance of online video streams and effectively increase the rebuilding quality of received videos.

Description

Technical field [0001] The invention relates to the field of image communication, in particular to a cross-node controlled online video stream selective retransmission method. Background technique [0002] With the development of image communication and broadband cellular communication technologies (such as the evolving B3G / 4G cellular communication), cellular video streaming applications based on the Internet Protocol (Internet Protocol, "IP") are gradually emerging. Different from the on-demand streaming based on offline video encoding, the online application mode of cellular video streaming (“online video streaming” for short) is based on the start-up delay limit acceptable to a single user. The sender encodes a single video online while the receiver Replay for a limited time. The development of advanced video coding and a new generation of broadband wireless mobile communications has made it possible for such new applications, but its error control faces greater technical ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04N7/24
Inventor 刘浩钱剑敏赵曙光徐海芹
Owner DONGHUA UNIV
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