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Image encoding method and image decoding method

An image encoding and image decoding technology, applied in the field of image encoding and image decoding, can solve the problems of complex encoding processing, burden of input and output, and reduced encoding efficiency.

Inactive Publication Date: 2005-09-07
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, since the amount of information stored in the vector buffers 914 and 960 is large, the input and output of the information is burdened, the encoding process becomes complicated, and the encoding efficiency decreases.

Method used

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  • Image encoding method and image decoding method
  • Image encoding method and image decoding method
  • Image encoding method and image decoding method

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Experimental program
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Embodiment Construction

[0196] (Embodiment 1)

[0197] Next, an image coding apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings.

[0198] Figure 10 It is a block diagram of the image coding apparatus in Embodiment 1.

[0199] The image encoding device 100 acquires an image signal Img representing the content of an image, encodes the image signal Img for each block, and includes a subtracter 101, an image decoding unit 104, a variable length encoding unit 103, a motion estimation unit 109, and a prediction type selection unit 108, switches 111, 112, pixel interpolation unit 106, direct mode processing unit 110, vector buffer 114, multi-frame buffer 107, and image selection unit 113.

[0200] The subtractor 101 subtracts the predicted image signal Pre from the image signal Img, and outputs the result of the subtraction as a residual signal Res.

[0201] The image encoding unit 102 acquires the residual signal Res from the subtracter 101, pe...

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Abstract

The picture coding method comprises: a second reference picture selection step of selecting, as a second reference picture, any one of coded pictures located after the current picture to be coded in display order (S100); a predictive image generation step of specifying a block in the first reference picture and a block in the second reference picture, and generating a predictive image from said two blocks through pixel interpolation (S102 and S104); a coding step of coding a difference between the predictive image and an image of a current block to be coded (S106 and S108); and an output step of outputting specification information for specifying the second reference picture, together with a result of the coding performed in the coding step.

Description

technical field [0001] The present invention relates to an image encoding method for encoding image signals and an image decoding method for decoding encoded image signals. Background technique [0002] In recent years, with the development of multimedia applications, so-called media information such as images, sounds, and texts can usually be processed in a unified manner. [0003] Thus, media can be uniformly processed by digitizing all media. [0004] However, because the digitized image has a huge amount of data, image information compression technology is indispensable for storage and transmission. In addition, standardization of compression techniques is also important in order to mutually utilize compressed image data. As standard specifications of image compression technology, there are H.261 and H.263 of ITU-T (International Telecommunications Union Telecommunications Standardization Sector), MPEG (Moving Picture Experts Group)-1 and MPEG-2 of ISO (International O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00H04N7/26H04N7/36H04N7/46H04N7/50
CPCH04N19/00781H04N19/00278H04N19/00587H04N19/00727H04N19/00721H04N19/00145H04N19/0003H04N19/00103H04N19/00018H04N19/00139H04N19/00024H04N19/00212H04N19/00266H04N19/00224H04N19/103H04N19/105H04N19/107H04N19/127H04N19/136H04N19/137H04N19/157H04N19/16H04N19/172H04N19/176H04N19/51H04N19/577H04N19/58H04N19/61
Inventor 羽饲诚野真也近藤敏志安倍清史
Owner PANASONIC CORP
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