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Video coding system and its method

A video coding and video technology, applied in the field of video coding systems, can solve problems that do not meet real-time requirements, complex calculations, and bit rate can not provide image quality, etc., to achieve the effect of consistent image quality

Active Publication Date: 2006-07-12
QUANTA COMPUTER INC
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AI Technical Summary

Problems solved by technology

Although changing the bit rate multiple times can provide better image quality, it also requires a larger storage capacity and more complex calculations, so the technology of changing the bit rate multiple times does not meet real-time requirements
In addition, when the scene changes suddenly in the video sequence, a single bit rate change cannot provide consistent image quality

Method used

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  • Video coding system and its method

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Embodiment Construction

[0022] see figure 1 , which is a functional block diagram of the video coding system 10 of the present invention. A video sequence 12 includes N subsequences, N is a natural number, and each subsequence includes multiple frames. In each frame of the video sequence 12, a predetermined number of rows and columns (Predefined number of rows and columns) are predefined, and each column and each row includes a plurality of Macroblocks (MB). A video sequence (Video sequence) 12 is input to the video encoding system (Video encoding system) 10 of the present invention through an input end (Input end) 14 . The video coding system 10 is used for coding the jth frame in the i-th subsequence, and the coding of the frames before the j-th frame in the i-th subsequence has been completed. i is an integer index ranging from 1 to N, and j is an integer index ranging from 2 to the number of frames of the i-th subsequence.

[0023] Such as figure 1 As shown, the video coding system 10 of the ...

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Abstract

Said invention provides a video message encoding method encoding method and system for encoding video message sequence. Video message sequence containing N subsequences, and each subsequence containing plurality of pictures. When present invention encoding j picture of i subsequence in video message sequence, the pictures before j picture are all completing encoding. Based on said completed coded picture it generates an initial quantisation scale. Proceeding encoding to said j picture using intermediate code mode According to initial quantisation scale. Judging whether there is a variable scene comparing j picture to ( j -1 ) picture, if above-mentioned result is, then to generate a regulative quantisation scale base on initial quantisation scale, and re - encoding j picture using Interior encode model encode model according to adjusted quantisation scale.

Description

technical field [0001] The present invention relates to a video encoding system (Video encoding system) and its method, in particular to a video encoding system with adaptive one-pass variable bit rate control (Adaptive one-pass variable bit rate control) and scene change detection (Scene change detection). Encoding system and its method. Background technique [0002] In recent years, digital compression technology has been widely used to compress various video files to save transmission bandwidth or storage capacity. Generally speaking, the current compression technology adopts the motion picture experts group standard (MPEG standard) formulated by the International organization for standardization (ISO), for example: MPEG-1, MPEG-2, MPEG-4,,,, etc. [0003] In file technology, a standard MPEG compliant video encoder uses a target bit rate to compress an input video sequence. The above-mentioned target bit rate is set according to the bandwidth of a communication channel...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/142H04N19/177
Inventor 张瀚仁赵维民
Owner QUANTA COMPUTER INC
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