Video quality assessment at a bitstream level

A bit stream, visual quality technology, applied in digital video signal modification, television, error detection/prevention using signal quality detectors, etc., can solve problems such as video quality degradation

Inactive Publication Date: 2015-03-04
THOMSON LICENSING SA
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in addition to the quality loss from video compression, video quality is further degraded when delivering video over IP networks

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 quality assessment at a bitstream level
  • Video quality assessment at a bitstream level
  • Video quality assessment at a bitstream level

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Video quality measurement tools can operate at different levels. For example, the tool can take the received bitstream and measure video quality without reconstructing the video. This approach is often referred to as bitstream-level video quality measurement. When allowing for additional computational complexity, video quality measurements can reconstruct some or all of the images from the bitstream, and use the reconstructed images to more accurately estimate video quality.

[0012] The present principles relate to an objective video quality model that evaluates video quality at the bitstream level without reconstructing the video.

[0013] Most existing video compression standards such as H.264 and MPEG-2 use a macroblock as the basic coding unit. Therefore, the following embodiments use a macroblock as a basic processing unit. However, the principle is applicable to using blocks of different sizes, such as 8x8 blocks, 16x8 blocks, 32x32 blocks or 64x64 blocks.

...

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

A macroblock in a video sequence may be undecodable because the corresponding compressed data is lost or the syntax is out of synchronization. An undecodable macroblock may be concealed using error concealment technique. The level of initial visible artifacts caused by undecodable macroblocks may be estimated as a function of motion magnitude, error concealment distance, and / or residual energy. The initial visible artifacts may propagate spatially or temporally to other macroblocks through prediction. Considering both initial visible artifacts and propagated artifacts, levels of overall artifacts may be estimated for individual macroblocks. The visual quality for the video sequence can then be estimated by pooling the macroblock level artifact levels.

Description

technical field [0001] The present invention relates to video quality measurement, and more particularly, to methods and apparatus for determining objective video quality metrics. Background technique [0002] With the development of IP networks, video communication through wired and wireless IP networks such as Internet IPTV services has become popular. Unlike traditional video delivery over cable networks, video delivery over IP networks is less reliable. Therefore, in addition to the quality loss from video compression, video quality is further degraded when video is delivered over an IP network. In addition to the degradation caused by video compression, a successful video quality modeling tool needs to rate the degradation caused by network transport impairments including, for example, loss, transport delay, and transport jitter. Contents of the invention [0003] The present principles provide a method for estimating the visual quality of a video sequence represent...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
CPCH04N17/004H04N19/89H04L1/20H04N19/895H04N19/139H04N19/154H04N19/177H04N19/184H04N19/44H04N19/86
Inventor 廖宁陈志波谢凯
Owner THOMSON LICENSING SA
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