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Systems and methods for measuring loss of detail in a video codec block

A video block and video frame technology, applied in the direction of digital video signal modification, TV, electrical components, etc., can solve the problem of low processing overhead

Inactive Publication Date: 2013-11-06
PROJECT GIANTS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is also desirable that the method be computationally efficient such that it will have low processing overhead for a given level of accuracy

Method used

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  • Systems and methods for measuring loss of detail in a video codec block
  • Systems and methods for measuring loss of detail in a video codec block
  • Systems and methods for measuring loss of detail in a video codec block

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Embodiment Construction

[0025] The present invention is in figure 1 shown in block diagram form. This device handles input video under test like figure 2 The block damages the image. For illustrative purposes, a slightly extreme level of blockiness has been used to show figure 2 The block damages the image. when available, e.g. image 3 The corresponding reference shown is also entered. output includes Figure 4 The perblock measurements shown in the DC block effect diagram shown and as Figure 5 Plotted summary measurements per frame or for the entire video sequence.

[0026] Embodiments of the test and measurement system according to the present invention perform as figure 1 The following procedure is shown. Use a dashed line to show reference video frames as connected, which is optional.

[0027] perform an objective blockiness measure by block and produce e.g. Figure 4 The DC block effect diagram shown. These block measurements can be averaged to yield objective measurements by f...

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Abstract

Picture quality measurement systems and methods are provided for measuring DC blockiness within video blocks. Block boundaries are located within a test video frame. The relative AC differences within each block are measured using a reference video frame, a statistically estimated reference or a default value of the white video level divided by two. An objective DC blockiness map, a subjective DC blockiness map or both may be generated.

Description

[0001] Cross-reference to related applications [0002] This application benefits from US Provisional Application 60, entitled "Systems and Methods for Measuring Loss of Detail in a Video Codec Block," filed April 9, 2007 / 910817, the contents of which are hereby incorporated by reference. Background technique [0003] Embodiments of the present invention relate to video test and measurement equipment, and more particularly, to image quality measurements for video. [0004] Video compression methods such as MPEG-2 and H.264 process video, a small portion of the image at a time. These small image parts are often rectangles of the same size called blocks. The blocks are grouped together in a block grid. In lossy block-based compression methods, blocking impairments are revealed within each processed block. These blocking impairments correspond to errors in compression methods caused by losses. The highest loss results in a total loss of detail within the block (AC part of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26
CPCH04N19/00781H04N19/00278H04N19/00157H04N19/00909H04N19/14H04N19/176H04N19/61H04N19/86
Inventor K·费尔古森J·卢
Owner PROJECT GIANTS LLC