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Method and system for generating a transform size syntax element for video decoding

A technology of video decoder and size conversion, which is applied in the direction of digital video signal modification, TV, electrical components, etc., and can solve problems such as low bit rate

Active Publication Date: 2008-07-09
DOLBY INT AB
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some applications, such as those supported by advanced specifications, it may be desirable to obtain low bitrates by other means, that is, to provide higher coding efficiency without producing sharp or abrupt transitions when displaying images and / or video Compression artifacts that may result when using large transform sizes in some parts of the signal

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  • Method and system for generating a transform size syntax element for video decoding
  • Method and system for generating a transform size syntax element for video decoding

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Embodiment Construction

[0117]Certain embodiments of the present invention may be found in a method and system for dynamically selecting transform sizes based on signal content. Implementation of ISO MPEG4 Part 10 and ITU- The low bit rate target of TH.264 becomes possible. These selection rules and guidelines can be achieved by combining the benefits of residual correlation reduction by better signal prediction selection with the benefits of large transform sizes in regions without high image quality (detail) and / or sharp transitions this goal. In addition to providing improved compression efficiency through transform selection based on image content and predictive block size, the use of simple selection rules reduces the amount of side information that can be passed to the decoder to reconstruct the image. It is worth noting that the following discussion may generally use the terms "video", "image" and "picture" interchangeably. Therefore, the scope of the present invention should not be limited...

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Abstract

In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4x4 or an 8x8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and / or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream.

Description

technical field [0001] The invention relates to video signal processing, in particular to a method and system for dynamically selecting transform size in a video decoder according to signal content. Background technique [0002] The introduction of advanced video applications such as digital television, high-definition television, and Internet video has fueled the need for standardized compression techniques for television broadcast and home entertainment systems. For example, the Moving Picture Experts Group (MPEG) of the International Organization for Standardization (ISO) developed the MPEG4 compression standard to support network video applications. As another example, the Video Coding Experts Group (VCEG) of the Communications Standardization Sector (ITU-T) of the International Telecommunication Union formulated the ITU-T H.263 compression standard to support video conferencing applications. These and other video coding standards are being developed to make new video t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/105H04N19/122H04N19/13H04N19/176H04N19/186H04N19/70
Inventor 斯蒂芬·戈丹道格拉斯·钦
Owner DOLBY INT AB
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