Coding/decoding method and device for fountain codes
An encoding and decoding method and a technology of encoding methods, which are applied in the field of error control, can solve the problems of inability to guarantee basic video playback quality, inability to meet layered video transmission, limited number of encoding symbols, etc., to improve effectiveness, reduce recovery time, Guaranteed recovery effect
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[0047] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.
[0048] In order to realize efficient and reliable video transmission in a layered multicast environment, the present invention provides a fountain code coding and decoding method, including two parts of coding and decoding. Moreover, the present invention is aimed at a video source that has undergone layered coding. For video data, there are many methods of layered coding, such as: time-domain scalable, spatial-domain scalable, quality scalable, and so on.
[0049] Encoding methods implemented at the sender include:
[0050] A. Divide the original data blocks into different information layers in order of priority from high to low.
[0051] B. Each information layer is independently pre-coded at the same code rate to obtain a coded layer, and each coded layer is cascaded and then sent to a priority LT coder.
[0052...
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