Video constant quality control method in the mode of pyramid type bidirectional estimation

A quality control method and two-way prediction technology, applied in the direction of digital video signal modification, television, electrical components, etc., can solve the problem of not considering the impact of quality fluctuations, can not be effectively applied, etc., to achieve the effect of improving quality

Active Publication Date: 2008-01-23
SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not consider the impact of the interleaving of video frames at different time layers on quality fluctuations caused by the sp

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Video constant quality control method in the mode of pyramid type bidirectional estimation
  • Video constant quality control method in the mode of pyramid type bidirectional estimation
  • Video constant quality control method in the mode of pyramid type bidirectional estimation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0044]As shown in Figure 1, the prediction mode of the first two complete image groups of the stefan video sequence composed of 300 frames of images, each GOP contains 8 frames of images, and the sequence numbers 0, 1, ..., 16 represent the encoding sequence of the video, Tx(x =0, 1, 2, 3) indicates the time level of the corresponding frame, where T 0 Represents the base layer, and the rest represent the enhancement layer, and the arrows represent the prediction relationship. In the same image group, the encoding sequence numbers are executed in ascending order. Suppose the value ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a control method for the video constant quality in a pyramid type double-way prediction mode, which belongs to the video technical field. The present invention comprises the following procedures: the first step, an initial quantization parameter to the whole video sequence is set according to the linear relationship between the peak value speech noise ratio and the quantization parameter; the second step, the quantization parameter of the time basic layer is adjusted according to the changing information of the average absolute difference among the peak value speech noise ratio of the decoded image, the decoded frame, and the reference frame; the third step, the quantization parameter of the time enhance layer is adjusted according to the changing information of the time basic layer parameter and the average absolute difference of the previous and current reference frame, to realize the control to the video constant quality in the pyramid type double-way prediction mode. The present invention can improve the consistency of the decode quality of the scalable video in a time zone, and efficiently decreases the volatility among the video frames.

Description

technical field [0001] The invention relates to a video constant quality control method in the field of video technology, in particular to a video constant quality control method in a pyramid bidirectional prediction mode. Background technique [0002] The transmission and storage of video signals usually require optimal selection of encoding and compression parameters. In the encoding process, the goal of optimization can be to aim at a constant output bit rate or to aim at a constant output quality. The former is called constant bit rate coding, which is usually realized by bit rate control, and the latter is called constant quality coding, which is usually realized by fixing quantization parameters per frame. [0003] Existing video coding standards such as H.261, H.263, H.263+, H.264 standards specified by ITU and MPEG-1, MPEG-2, MPEG-4 specified by ISO's MPEG organization are all based on Hybrid coding, which is based on the Hybrid Coding framework. The so-called hyb...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04N7/26H04N7/32H04N19/159H04N19/196
Inventor 宋利张文军杨小康郑世宝谈永敏
Owner SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap