Method and apparatus of coding/decoding image
AssigneeSamsung Electronics Co., Ltd.
InventorsDae Sung Cho, Woong Il Cho
Life of this patent
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Abstract
An apparatus and a method of coding/decoding an image are provided. The apparatus includes: a low resolution image coding unit that codes a low resolution image corresponding to an input image using motion estimation and compensation; and a residual image coding unit that performs intra mode coding with respect to a residual image which indicates a difference between a reconstructed image of the coded low resolution image and the input image by considering temporal correlation between neighboring residual images.
Claims15
An apparatus to code an image, the apparatus comprising:
- a low resolution image coding unit that codes a plurality of low resolution images respectively corresponding to a plurality of input images using motion estimation and compensation;
- and
- a residual image coding unit that performs intra mode coding with respect to a plurality of residual images, the residual images relating to differences between reconstructed images of the coded low resolution images that are up-sampled and the input images, the residual image coding unit performing the intra mode coding by considering a temporal correlation between neighboring ones of the residual images when the residual image being coded is between key frames,
- wherein the residual image coding unit comprises:
- a first residual coding unit that performs the intra mode coding, the intra mode coded residual image corresponding to a first key frame;
- and
- a second residual coding unit, the residual image coded by the second residual coding unit being a power distribution frame between the first key frame and a second key frame, the second residual coding unit considering a temporal correlation between the first key frame and the second key frame.
A method of coding a residual image, the residual image indicating a difference between an input image and a reconstructed image of the input image, the method comprising:
- quantizing the residual image to generate a plurality of quantizing coefficients;
- classifying the plurality of quantizing coefficients into a co-set including at least two of the quantizing coefficients;
- and
- coding the residual image, the input image including operations which code the co-set to a single symbol,
- wherein co-sets are configured based on correlation between temporally adjacent residual images.
An apparatus to decode an image, the apparatus comprising:
- a low resolution image decoding unit that decodes a first bitstream corresponding to a low resolution image;
- and
- a residual image decoding unit that decodes a second bitstream corresponding to one of a plurality of residual images using a temporal correlation between neighboring ones of the residual images when the residual image being decoded is between key frames,
- wherein the residual image decoding unit comprises:
- a first residual decoding unit that performs intra mode decoding with respect to the second bitstream corresponding to a first key frame;
- and
- a second residual decoding unit that decodes the second bitstream corresponding to a power distribution frame between the first key frame and a second key frame using temporal correlation between the first key frame and the second key frame.
Dependencies are inferred from the claim text.