Coding method, coding transmitting device and system for data transmission

A technology of data transmission and encoding method, which is applied in the field of audio and video data packet encoding processing in the process of multimedia data transmission, and can solve the problem of difficult balance between packet loss recovery effect and encoding efficiency

Active Publication Date: 2017-07-07
SHENZHEN GRANDSTREAM NETWORKS TECH +1
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Problems solved by technology

However, the current FEC coding design has the difficulty of achievin

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  • Coding method, coding transmitting device and system for data transmission
  • Coding method, coding transmitting device and system for data transmission

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[0029] The solution provided by the present invention selects the best RS coding mode according to the statistical packet loss rate when the ratio of the number of redundant packets to the number of information packets is fixed, that is, the number of information packets and the number of redundant packets with the best RS coding are determined, To perform FEC encoding, the packet loss recovery rate can be guaranteed, thereby ensuring that the video at the receiving end of the channel has a better quality.

[0030] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0031] The inventive principle of the embodiment of the present invention: According t...

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Abstract

The invention discloses a coding method for data transmission, mainly comprising the following steps: step a, setting an initial value p<t> of the predicted packet loss rate and the FEC redundancy r; step b, coding the data at the channel sending end to obtain a plurality of information packets; step c, calculating the packet loss recovery probability according to the predicted packet loss rate and the FEC redundancy r, and selecting an optimal RS coding model RS(Nf, kf); step d, carrying out error correction coding according to the optimal RS coding mode RS(Nf, kf) to obtain Nf-kf redundant packets; and step e, packaging and sending the coded redundant packets and the information packets together, and enabling the receiving end to update the predicted packet loss rate according to the packet loss conditions of the received information packets. According to the scheme disclosed by the invention, the channel sending end sends the efficiently-coded FEC redundant packets while sending the information packets so as to ensure that the channel receiving end can recover the packet loss in a video transmission process, and thus the video quality of the receiving end can be ensured.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a method for encoding and processing audio and video data packets in the multimedia data transmission process. Background technique [0002] With the rapid development of network technology, streaming media technology has become one of the most popular Internet technologies at present, and it is the basis to ensure that we can share images, audio, video and other multimedia files quickly and with high fidelity. In streaming media technology, due to the large amount of data of video images and the limitation of network bandwidth, data packet loss or error is inevitable. If the packet loss of the video file (referred to as "packet loss" for short in the example of the present invention to data packet error or loss) reaches a certain level, it will seriously affect the visual effect of the video at the receiving end, block effect will occur, the video will be blurred, and even...

Claims

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Application Information

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IPC IPC(8): H04N21/2383H04N21/438H04L1/00
CPCH04L1/004H04N21/2383H04N21/4382
Inventor 羊开云高可攀徐捷陈利韩翀蛟徐晓峰李夏宾
Owner SHENZHEN GRANDSTREAM NETWORKS TECH
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