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Scalable multi-description video encoding structure design method based on code rate control

A bit rate control and video coding technology, applied in the field of video coding and network transmission, it can solve the problems of few scalable and multi-descriptive video coding, and achieve the effect of stable viewing quality and improving stable transmission.

Inactive Publication Date: 2009-07-08
XI AN JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

[0004] Most of the current scalable multi-description algorithms deal with the temporal and spatial redundancy of the video sequence, and there are few scalable multi-description video coding through bit rate control

Method used

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  • Scalable multi-description video encoding structure design method based on code rate control
  • Scalable multi-description video encoding structure design method based on code rate control
  • Scalable multi-description video encoding structure design method based on code rate control

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Embodiment Construction

[0023] The present invention further realizes different description coding of video code streams on the basis of space scalable, time scalable and quality scalable technologies.

[0024] Since the rate-distortion curves between the code blocks have a certain connection, the code blocks in the video frame can be divided into two types. Rate control constraints, so as to obtain different encoded streams with the same importance of the same video content, and these streams are transmitted separately in different channels in the network. If a video description packet is lost or delayed due to network bandwidth changes and network congestion, the client can decode the video according to another description, thereby improving the reliability of the client's viewing; if the client can receive multiple video descriptions , since the descriptions have different information content, the client will get better subjective and objective visual effects.

[0025] The present invention reali...

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Abstract

The present invention discloses an extensible multi-description video coding structure design method based on code rate control. According to the invention, a same video is executed with two or a plurality of descriptions with same importance. The time domain redundancy is eliminated through a ''movement compensation time domain filtering technique''. The effective coding of multi-description video texture information of three-dimensional wavelet coefficient is realized through an ''entropy coding technique''. The forming of different video descriptions is realized through a ''Lagrange characteristic code rate control technique''. The random truncation of bitstream is realized through a ''three-dimensional sectile embedded type code rate control technique'' for satisfying video decoding results with different qualities. The independent transmission of a plurality of sub-transmission is realized through a ''multi-path transmission technique''.

Description

technical field [0001] The invention belongs to the field of video coding and network transmission. In particular, it relates to a design method of a scalable multi-description video coding structure based on code rate control. Background technique [0002] The Internet's connectionless packet forwarding mechanism is mainly designed to solve sudden data transmission. Bandwidth changes and network congestion will cause packet data loss, which itself cannot well adapt to the transmission of scalable video streams. Once the traditional Scalable Video Coding (Scalable Video Coding, SVC) loses the data of the basic layer, even if more enhancement layer data is received, the video cannot be decoded normally. Scalable multi-description coding is an effective method to utilize the redundancy between code streams at the source coding end in exchange for stable transmission. The basic idea of ​​the scalable multi-description coding technique is to encode a video sequence into two or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/24H04N19/31H04N19/625H04N19/80
Inventor 兰旭光赵松霖薛建儒王斌李策惠苗郑南宁
Owner XI AN JIAOTONG UNIV
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