Method for transmitting multimedia data

A technology of multimedia data and data, applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve the problems of increased transmission delay, influence of multimedia transmission, influence of reliability of data transmission, etc.

Active Publication Date: 2011-04-20
香港城市大学深圳研究院
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Problems solved by technology

[0002] When transmitting multimedia data on the Internet, due to real-time changes in network congestion, the reliability of data transmission is seriously affected
Generally, multimedia data is transmitted in packages. When the network is not congested, the network delay is small, the packet loss rate of multimedia data packets is also small, and the transmission efficiency of multimedia data is high. However, when the network is congested, the packet loss rate of multimedia data increases, the transmission delay also increases, and multimedia transmission is seriously affected

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Embodiment Construction

[0020] In order to solve the problem of poor data playback effect caused by a large number of packet loss in the multimedia transmission process on the Internet, the present invention proposes a multimedia transmission method for redundant processing of transmitted data based on binomial probability. The method includes:

[0021] The sender uses the binomial probability model to calculate the number of redundant data packets, and uses the RS encoder to generate redundant data packets k;

[0022] After receiving the data, the receiving end calculates the packet loss rate of the network, and feeds back the packet loss result to the sending end according to the signaling transmission state machine;

[0023] After receiving the packet loss result, the sender dynamically adjusts the number of redundant data packets and sends a new round of data packets, including original data and redundant data packets.

[0024] The core idea of ​​the binomial probability model above is: Assume n...

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Abstract

The invention provides a method for transmitting multimedia data. The method is as follows: carrying out redundant processing on data to be transmitted at a sending end, dividing the data to be transmitted into an original data packet n and a redundant data packet k, marking sequence numbers for cseq field information in each data packet in an incremental manner, and then sending to a receiving end; after the receiving end receives the multimedia data packet, calculating a network packet loss ratio according to the cseq field information, and feeding back a calculated result to the sending end in a user datagram protocol (UDP) transmission manner; and calculating the number of redundant information packets sent in the next round by the sending end by utilizing a Reed-Solomon redundant codec according to the received packet loss ratio. In the invention, only the cseq field information of the redundant data packet is filled aiming at video data; and audio data and a redundant information packet are mixed according to the interwoven loss package recovery technology and then sent together aiming at the audio data. By utilizing the invention, the bandwidth resources can be fully utilized, and the bandwidth utilization ratio can be improved.

Description

technical field [0001] The invention relates to the technology in the field of multimedia network communication, in particular to a method for transmitting multimedia data according to the number of redundant data packets calculated by a binomial probability model. Background technique [0002] When transmitting multimedia data on the Internet, due to real-time changes in network congestion, the reliability of data transmission is seriously affected. In general, multimedia data is transmitted in packages. When the network is not congested, the network delay is small, the packet loss rate of multimedia data packets is also small, and the transmission efficiency of multimedia data is high. However, when the network is congested, the packet loss rate of multimedia data Increase, transmission delay also increases, multimedia transmission is seriously affected. [0003] How to solve the problem caused by a large number of network packet loss to the Internet for connectionless mu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L1/00
Inventor 贾维嘉沈平张历卓周磊
Owner 香港城市大学深圳研究院
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