Dynamic image encoding device, dynamic image encoding method, dynamic image encoding program, dynamic image decoding device, dynamic image decoding method, and dynamic image decoding program

A dynamic image and coding device technology, applied in image communication, television, electrical components, etc., can solve problems such as inability to move and compensate

Inactive Publication Date: 2009-09-23
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, since both Non-Patent Document 1 and Non-Patent Document 2 are filters symmetrical about the horizontal and vertical directions, there is a problem that high-precision motion compensation cannot be performed on images with different characteristics in the horizontal and vertical directions.

Method used

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  • Dynamic image encoding device, dynamic image encoding method, dynamic image encoding program, dynamic image decoding device, dynamic image decoding method, and dynamic image decoding program
  • Dynamic image encoding device, dynamic image encoding method, dynamic image encoding program, dynamic image decoding device, dynamic image decoding method, and dynamic image decoding program
  • Dynamic image encoding device, dynamic image encoding method, dynamic image encoding program, dynamic image decoding device, dynamic image decoding method, and dynamic image decoding program

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no. 1 Embodiment approach

[0121] A video encoding device, video encoding method, video encoding program, video decoding device, video decoding method, and video decoding program according to the first embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same reference numerals are attached to the same elements, and repeated explanations are omitted.

[0122] figure 2 It is a block diagram showing the configuration of the video encoding device 20 according to this embodiment. The moving picture encoding device 20 is configured to have the following parts as its functional components, namely: an input unit 201, a filter determination unit (filter determination unit) 202, a filter information storage unit (filter information storage unit) 203, a score A precision reference image generation unit 204 , a filter information encoding unit (filter information encoding unit) 205 , a frame memory 206 , a frame image encoding / decoding unit 207 , ...

no. 2 Embodiment approach

[0273] Next, when coding is performed using a plurality of reference frames (reference images), a modified example in which a fractional precision reference image is generated using a different filter for each reference frame will be described.

[0274] In the above-mentioned H.264 encoding method and the descriptions described in the above-mentioned Non-Patent Document 1 and Non-Patent Document 2, when the reference picture has multiple frames, the same filter is used for all the reference pictures according to each frame to be coded. to generate reference images with fractional pixel precision. Therefore, when a frame to be encoded has a different pixel-accurate shift amount and frequency characteristic for each reference image, there is a problem that encoding cannot be performed using a filter suitable for encoding each reference image. High-precision motion compensation cannot be performed. The object of the second embodiment is to realize high-precision motion compensat...

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Abstract

The object is to compensate motion at high precision even for an image having different characteristics in the horizontal direction and vertical direction, while decreasing code quantity of filter coefficients when a reference image with the fractional image accuracy is generated using a filter of each frame and is encoded and decoded with compensating motion. A video encoding device 20 which creates a reference image with a fractional pixel accuracy for a video image of a time series of frame images, by using a filter for each frame image, and compensate motion, the video encoding device comprising: a filter information storage unit 203 which stores a filter used for encoding of a frame image in the past; a filter decision unit 202 which selects and decides a filter to be used for encoding of the current frame image from among a plurality of filter candidates including at least the filter stored in the filter information storage unit 203; and a filter information encoding unit 205 which encodes information indicating the decided filter.

Description

technical field [0001] The present invention relates to a video encoding device, a video encoding method, a video encoding program, a video decoding device, a video decoding method, and a video decoding program. Background technique [0002] In the moving picture coding method using motion compensation, the motion of the coding target picture is detected using the reference picture coded in the past stored in the frame memory, and the motion compensation picture (prediction) is generated from the reference picture using the detected motion vector. image). At this time, by changing the precision of the reference image from the precision of the pixel unit (integer pixel precision) originally existing in the reference image to the precision of the pixel unit (fractional pixel precision) between adjacent pixels of the reference image, it is possible to achieve high-precision By compensating for the movement of the encoding target image, the encoding efficiency can be improved. ...

Claims

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Application Information

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IPC IPC(8): H04N7/32H04N19/50H04N19/109H04N19/117H04N19/132H04N19/134H04N19/137H04N19/149H04N19/172H04N19/196H04N19/423H04N19/46H04N19/503H04N19/523H04N19/59H04N19/70H04N19/80
CPCH04N19/006H04N7/364H04N19/0063H04N19/00606H04N19/00066H04N7/26058H04N7/26154H04N19/00739H04N19/0089H04N7/26781H04N7/26776H04N7/26377H04N19/00175H04N7/26808H04N19/117H04N19/147H04N19/523H04N19/53H04N19/533H04N19/80H04N19/105
Inventor加藤祯笃文仲丞
OwnerNTT DOCOMO INC