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Parallel image sequence bit rate controlling method for digital TV video coder

A video encoder and digital TV technology, applied in the field of video encoding, can solve problems such as lack of universality and popularization, and affect the performance of the encoder, and achieve the effect of avoiding uneven quality, applicability, and good expansion

Inactive Publication Date: 2003-06-04
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

But it is oversimplified because it takes care of the implementation on the hardware, it is not universal and generalizable, and it will affect the performance of this type of encoder in most scene changes

Method used

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  • Parallel image sequence bit rate controlling method for digital TV video coder
  • Parallel image sequence bit rate controlling method for digital TV video coder
  • Parallel image sequence bit rate controlling method for digital TV video coder

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] figure 2 It is a parallel structure block diagram of an embodiment of the present invention, which is applied to the parallel encoding of multiple data streams from one high-definition television data source (image resolution 1920×1080).

[0027] Due to the high resolution of the high-definition picture, the amount of calculation required is huge, requiring extremely high processing power and high-speed data transmission capability, which brings great difficulties to the design of the hardware system. Usually, parallel processing technology is used to realize the complex operation of such a large amount of data, that is, a high-definition television picture is divided into several sub-blocks, and a sub-block is encoded in real time by a sub-encoder, and the parallel coordination of several sub-encoders The re...

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Abstract

The present invention is parallel image sequence bit rate controlling method for digital TV video coder. The input several video program sequences of different data sources or parallel image sequences of different spatial domain or frequency domain in the same data source, and the parallel encode unit is used to perform real-time MPEG-2 variable bit rate encoding of the image sequences. Super-frame is defined as the image frames of the image sequences in the same time, and super-image set is defined as the least common multiple of the image set sizes. The main control code rate control unit is used to perform layered and combined code rate control of the image frames, super-frame and super-image set, and the post-treating unit is used for code flow synthesis and code rate control of several compressed output data flows with the data being packaged in the multiplexer and fed to transmission channel via the buffering area.

Description

Technical field: [0001] The invention relates to a code rate control method for a parallel image sequence of a digital television video coder, which can be applied to the occasion of code rate allocation for multi-data stream coding and multiplexing in a constant rate (CBR) network service. It belongs to the technical field of video coding. technical background: [0002] At present, the common digital TV coding technology is MPEG-2 technology, which is described by the ISO / IEC13818 file, which only stipulates the grammatical specifications that the code stream compiled by the video encoder must abide by, including picture groups and picture frames. , macroblock, macroblock, block and other hierarchical structures, in which the image frame is divided into intraframe coding frame, forward predictive coding frame and bidirectional predictive coding frame according to the characteristics of time domain classification, but the standard does not specify the code rate Specific met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/015H04N19/142
Inventor 张文军余松煜熊红凯王峰
Owner SHANGHAI JIAO TONG UNIV
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