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Video encoding method and decoding method, their device, their program, and storage medium containing the program

An encoding method and technology of an encoding device are applied in the direction of color television with pulse code modulation, image communication, television, etc.

Active Publication Date: 2009-09-02
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, the downsampling of chrominance components in the prior art is performed at the same rate for all frames, and there is still room for improvement in terms of coding efficiency

Method used

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  • Video encoding method and decoding method, their device, their program, and storage medium containing the program
  • Video encoding method and decoding method, their device, their program, and storage medium containing the program
  • Video encoding method and decoding method, their device, their program, and storage medium containing the program

Examples

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Embodiment

[0209] Next, the present invention will be described in detail based on examples.

[0210] exist Figure 9 and Figure 10 In, one embodiment of a flowchart of the encoding process performed by the present invention is illustrated. According to this flowchart, the encoding process performed by the present invention will be described in detail.

[0211]Step S100: Read in flags (chroma-position-sequence-adaptive, chroma-position-slice-adaptive, chroma-position-MBs-adaptive) related to the setting of chroma macroblock position information, and write them out to the register. Set whether to use the sequence to adapt to the variable position of the chrominance macroblock, or use the described slice to adapt to the variable position of the chrominance macroblock, or use the described chrominance common block set to adapt to the position of the chrominance macroblock Variable handling.

[0212] Step S101: Determine whether the flag chroma-position-sequence-adaptive related to the ...

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Abstract

A video encoding method, in which a video signal consisting of two or more signal elements is targeted to be encoded, includes a step of setting a downsampling ratio is set for a specific signal element in a frame, in accordance with the characteristics in the frame; and a step of generating a target video signal to be encoded, by subjecting the specific signal element in the frame to downsampling in accordance with the set downsampling ratio. The frame may be divided into partial areas in accordance with localized characteristics in the frame; and a downsampling ratio for a specific signal element in these partial areas may be set in accordance with the characteristics in each partial area.

Description

technical field [0001] The present invention relates to a video coding method and device for coding a video signal composed of two or more signal components, a video decoding method and device for decoding coded data generated by the video coding method, and a method for realizing the video coding. A video encoding program of the method and a computer-readable recording medium recording the program, a video decoding program for realizing the video decoding method, and a computer-readable recording medium recording the program. [0002] This application claims priority based on Japanese Patent Application No. 2006-276074 for which it applied on October 10, 2006, and uses the content here. Background technique [0003] In the standard encoding method of moving pictures starting with H.264 / AVC, the chrominance components (chrominance elements) of the input image are downsampled (downsampling) compared with the luminance components (that is, at a sampling frequency higher than t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N11/04H04N7/32H04N19/50H04N19/503H04N19/523H04N19/59H04N19/60H04N19/61H04N19/91
CPCH04N19/00781H04N7/26122H04N19/00315H04N7/26196H04N19/00066H04N7/26058H04N19/00139H04N7/50H04N7/26292H04N7/26276H04N19/00757H04N19/002H04N7/465H04N19/0026H04N19/00266H04N7/26271H04N19/117H04N19/136H04N19/154H04N19/17H04N19/172H04N19/186H04N19/59H04N19/61H04N11/04
Inventor 坂东幸浩上仓一人八岛由幸
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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