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Method and apparatus for adaptively selecting context model for entropy coding

A technology of context and decoding method, applied in the field of video decoder

Inactive Publication Date: 2007-02-21
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the former case, although benefiting from accurate motion vectors, there is still an overhead due to motion vectors generated for each layer

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  • Method and apparatus for adaptively selecting context model for entropy coding
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Embodiment Construction

[0046] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0047] Advantages and features of the present invention and a method of achieving the same can be more easily understood with reference to the following detailed description of exemplary embodiments and accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will be defined only by the appended claims. Throughout the specification, the same reference numerals refer to the same parts.

[0048] Hereinafter, the present invention is described with reference to flowcharts of methods according to...

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Abstract

A method and apparatus for adaptively selecting a context model for entropy coding and a video decoder are provided. A method of coding a residual prediction flag indicating whether residual data for an enhancement layer block of a multi-layered video signal is predicted from residual data for a lower layer block corresponding to the residual data for the enhancement layer block includes the steps of calculating the energy of the residual data for the lower layer block, determining a coding method for the residual prediction flag according to the energy, and coding the residual prediction flag using the determined coding method.

Description

technical field [0001] Methods and apparatus consistent with the present invention relate to encoding and decoding of video signals, and more particularly to adaptively selecting a context model for entropy encoding and a video decoder. Background technique [0002] With the development of information communication technology including the Internet, there have been more and more multimedia services containing various information such as text, video, audio, and the like. Since the amount of multimedia data is generally large, the multimedia data requires a large-capacity storage medium and a wide bandwidth for transmission. Therefore, compression encoding methods are essential for transmitting multimedia data including text, video and audio. [0003] The basic principle of data compression is to remove data redundancy. Data can be compressed by removing spatial redundancy, in which the same color or object is repeated in an image, or psycho-visual redund...

Claims

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Application Information

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IPC IPC(8): H04N7/32H04N7/26H04N19/13H04N19/187H04N19/196H04N19/30H04N19/423H04N19/593H04N19/61
CPCH04N19/13H04N19/139H04N19/172H04N19/196H04N19/34H04N19/463
Inventor 李培根李教爀车尚昌韩宇镇
Owner SAMSUNG ELECTRONICS CO LTD