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Multiple sign bit hiding within a transform unit

A technology for transforming units and sign bits, applied in the field of sign bit hiding

Active Publication Date: 2013-07-24
VELOS MEDIA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Video presents considerable challenges to data compression due to the large amount of data required for each video frame and the speed at which encoding and decoding often need to occur

Method used

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  • Multiple sign bit hiding within a transform unit
  • Multiple sign bit hiding within a transform unit
  • Multiple sign bit hiding within a transform unit

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Embodiment Construction

[0028] In the following description, some example embodiments are described with reference to the H.264 standard for video coding and / or the developing MPEG-H standard. Those skilled in the art should appreciate that the present application is not limited to H.264 or MPEG-H, but is applicable to other video coding / decoding standards, including possible future standards, multi-view coding standards, scalable video coding standards, and A reconfigurable video coding standard.

[0029] In the following description, the terms frame, picture, slice, tile and rectangular slice group are used somewhat interchangeably when referring to video or images. Those skilled in the art will recognize that, in the case of the H.264 standard, a frame may contain one or more slices. It will also be recognized that, depending on the specific requirements or terminology of the applicable image or video coding standard, some encoding / decoding operations are performed on a frame-by-frame basis, some...

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Abstract

Methods of encoding and decoding for video data are described for encoding or decoding coefficients for a transform unit. In particular, the sign bits for the non-zero coefficients are encoded using sign bit hiding. Two or more sets of coefficients are defined for the transform unit and a sign bit may be hidden for each set, subject to satisfaction of a threshold test. The sets may correspond to coefficient groups that are otherwise used in multi-level significance map encoding and decoding.

Description

[0001] copyright notice [0002] A portion of the disclosure of this document and accompanying materials contains material to which copyright is claimed. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as published in the Patent and Trademark Office files or records, but reserves all other copyright rights whatsoever. technical field [0003] The present application relates generally to data compression, and in particular to methods and apparatus for sign bit concealment when encoding and decoding residual video data. Background technique [0004] Data compression occurs in numerous contexts. Data compression is very commonly used in communications and computer networking to efficiently store, transmit and reproduce information. It finds specific application in the encoding of images, audio and video. Video presents considerable challenges to data compression due to the large amount of data requ...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50
CPCH04N7/26372H04N19/00563H04N19/00557H04N19/467H04N19/48H04N19/00
Inventor 王競余祥何大可
Owner VELOS MEDIA INT LTD
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