Apparatus for encoding and decoding image by skip encoding and method for same

Patent metadata

Field	Value
Publication number	US-9743082-B2
Application number	US-201514643785-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	May 7, 2010
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.

First claim

What is claimed is:

1. An image decoding method performed by a decoding apparatus, comprising:
determining whether to perform filtering on signals to be used in generating intra prediction signals of decoding object signals, the signals being reconstructed earlier than the decoding object signals, the signals being adjacent to the decoding object signals;
performing the filtering on the signals in response to the determination that the filtering is performed; and
generating the intra prediction signals of the decoding object signals using the filtered signals;
wherein the determination of whether to perform the filtering is based on a block size of the decoding object signals and an intra prediction mode of the decoding object signals, and
wherein a tap size of a filter used in the filtering is variable.

2. The image decoding method of claim 1 , wherein a strength of the filter used in the filtering is variable.

3. The image decoding method of claim 2 , wherein the strength of the filter is determined based on a flag transmitted from an encoding apparatus, the flag indicating the strength of the filter.

Assignees

• Electronics & Telecommunications Res Inst
• Kwangwoon Univ Industry-Academic Collaboration Found
• Univ-Industry Coop Group Of Kyung Hee Univ

Inventors

• Lim Sung Chang
• Lee Ha Hyun
• Jeong Se Yoon
• Kim Hui Yong
• Cho Suk Hee
• Kim Jong Ho
• Lee Jin Ho
• Choi Jin Soo
• Kim Jin Woong
• Ahn Chie Teuk
• Sim Dong Gyu
• Oh Seoung Jun
• Park Gwang Hoon
• Park Sea Nae
• Jeon Chan Woong

Classifications

• H04N19/593 Primary

  involving spatial prediction techniques · CPC title

• H04N19/117 Primary

  Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) · CPC title

• H04N19/82

  involving filtering within a prediction loop · CPC title

• H04N19/176

  the region being a block, e.g. a macroblock · CPC title

• H04N19/132

  Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking · CPC title