# US 8,787,456 B2 · Image decoding device and method thereof using inter-coded predictive encoding code

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- Number: US 8,787,456 B2
- Document ID: US8787456B2
- Status: Granted
- Kind: B2
- Application number: 11/066,169
- Filed: 2005-02-28
- Published: 2005-11-03
- Granted: 2014-07-22
- Earliest claimed: 2004-04-28
- Assignees: Hitachi Consumer Electronics Co., Ltd.
- Applicants: Tomokazu Murakami; Yoshinori Suzuki
- Inventors: Tomokazu Murakami; Yoshinori Suzuki
- Web page: https://patentgrep.com/patent/US8787456B2

## CPC

- H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
- H04N 5/145: {Movement estimation (for video coding H04N19/51)}
- H04N 19/103: Selection of coding mode or of prediction mode
- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/11: among a plurality of spatial predictive coding modes
- H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
- H04N 19/146: Data rate or code amount at the encoder output
- H04N 19/167: Position within a video image, e.g. region of interest [ROI]
- H04N 19/172: the region being a picture, frame or field
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/513: Processing of motion vectors
- H04N 19/521: {for estimating the reliability of the determined motion vectors or motion vector field, e.g. for smoothing the motion vector field or for correcting motion vectors}
- H04N 19/593: involving spatial prediction techniques
- H04N 19/61: in combination with predictive coding
- H04N 19/85: using pre-processing or post-processing specially adapted for video compression
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An image encoding device and corresponding decoding device are disclosed for achieving a high rate of compression. The encoding device includes an image conversion module that converts the direction of the images using right-left symmetry mode convention or up-down symmetry mode conversion. Encoding modules are used to encode both the unconverted and converted images. A mode selector module compares the quantity of codes in the encoded unconverted images and the quantity of codes in the encoded converted images, and selects codes that are smaller in the quantity of codes for output.

## Claims

### Claim 1

A method of inter-coded predictive decoding images comprising the steps of:
receiving an encoded image information to be decoded and a flip information indicating whether a partial area of an image to be decoded is flipped or not, wherein in the encoded image information both a flipped partial area and a non-flipped partial area are included in one image;
deciding whether to flip a partial area of a reference image which is previously decoded and stored, according to the flip information,
flipping the partial area of the reference image,
decoding the encoded image information into a decoded image using the flipped reference image, and
storing the decoded image as a reference image.