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Video encoding method based on prediction time and space domain conerent movement vectors

A technology of motion vector prediction and video coding, which is applied in the field of video coding systems, can solve the problems of low coding efficiency and failure to use motion vector correlation, etc., and achieve the effect of improving prediction accuracy

Inactive Publication Date: 2003-11-19
BEIJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

It should be said that the median prediction method is a simple and efficient motion vector prediction method, and its main disadvantages are: (1) It does not utilize the correlation of the motion vector in the time domain
(2) For video sequences with complex motion, the coding efficiency is usually greatly reduced

Method used

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  • Video encoding method based on prediction time and space domain conerent movement vectors
  • Video encoding method based on prediction time and space domain conerent movement vectors
  • Video encoding method based on prediction time and space domain conerent movement vectors

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Embodiment Construction

[0040] The purpose of the video coding system of the present invention is to compress the data volume of the video sequence as much as possible on the premise of obtaining a certain video reconstruction quality, so as to facilitate the storage or transmission of video information. exist image 3 In the block diagram of the video encoding system shown, cameras and capture cards are commercially available to convert the object of interest into a digital video sequence that can be processed by a computer. The video sequence file in the figure indicates that the input of the system can also be a digital video sequence obtained through other equipment and stored in the computer hard disk in advance. These digital video sequences are the raw video sequences that are used as input to the system for compression. Execute the video coding subroutine on the computer to compress the original video sequence, and the compressed result is stored on the hard disk of the computer in the form ...

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Abstract

The invention puts forward the predicting method by combining correlation of motion vector between time domain and space domain as well as the method for describing movement correlation between adjacent macro blocks. The method includes following steps. A video camera converts the state of a target object to video frequency signal. The said video signal through an acquisition card is converted to a digital video frequency sequence stored in a flash memory to be used as input from system for further compression. The computer runs motion compensation / DCT mixed coded subroutine for original video frequency frames for carrying out video frequency compression and creating code stream file. The main point of the invention is the subrouting for predicting motion vector.

Description

Technical field: [0001] The invention relates to the technical field of computer digital video coding, and is aimed at video coding systems, such as HDTV, HD-DVD, streaming media servers and other applications. Background technique: [0002] Video information has a large amount of data. In order to effectively utilize bandwidth, video information must be compressed efficiently before storage or transmission. Coding efficiency is one of the important indicators to characterize the coding system. In the sense of rate distortion, coding efficiency refers to the bit rate output by the coding system under the condition of certain reconstructed video quality; or under the condition of certain output bit rate, The quality of the reconstructed video obtained. [0003] In the hybrid coding method based on motion compensation / DCT, the motion vector obtained by motion estimation needs to be encoded, and together with the texture information, a compressed code stream is formed, so that...

Claims

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Application Information

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IPC IPC(8): H04N5/14H04N7/015H04N19/129H04N19/44H04N19/513
Inventor 薛金柱沈兰荪
Owner BEIJING UNIV OF TECH
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