US 9,813,709 B2
Intra-prediction encoding method, intra-prediction decoding method, intra-prediction encoding apparatus, intra-prediction decoding apparatus, program therefor and recording medium having program recorded thereon
Shohei Matsuo, Yokosuka (JP); Masaaki Matsumura, Yokosuka (JP); Hiroshi Fujii, Yokohama (JP); Seishi Takamura, Yokosuka (JP); and Atsushi Shimizu, Yokosuka (JP)
Assigned to Nippon Telegraph And Telephone Corporation, Tokyo (JP)
Appl. No. 14/430,851
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Sep. 26, 2013, PCT No. PCT/JP2013/076073
§ 371(c)(1), (2) Date Mar. 24, 2015,
PCT Pub. No. WO2014/050971, PCT Pub. Date Apr. 3, 2014.
Claims priority of application No. 2012-217888 (JP), filed on Sep. 28, 2012.
Prior Publication US 2015/0245021 A1, Aug. 27, 2015
Int. Cl. H04N 19/105 (2014.01); H04N 19/11 (2014.01); H04N 19/136 (2014.01); H04N 19/176 (2014.01); H04N 19/147 (2014.01); H04N 19/593 (2014.01); H04N 19/182 (2014.01); H04N 19/159 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/11 (2014.11); H04N 19/136 (2014.11); H04N 19/147 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/182 (2014.11); H04N 19/593 (2014.11)] 8 Claims
OG exemplary drawing
 
1. An intra-prediction encoding method comprising:
setting a reference pixel signal from a decoded pixel signal in intra-prediction in which a prediction signal is generated in the same frame;
acquiring prediction mode identification information that identifies an intra-prediction mode;
generating a prediction signal based on the reference pixel signal and the prediction mode identification information;
selecting one of a plurality of correction matrix information stored in a storage, each of the plurality of correction matrix information including information that indicates whether correction is needed for a pixel that is a prediction target, the correction matrix information selected corresponding to the intra-prediction mode;
making, for each pixel as an unit, a determination regarding correction of the prediction signal on a basis of the correction matrix information selected;
correcting, according to a result of the determination, the generated prediction signal using another reference pixel having a shorter distance from the pixel that is the prediction target than a reference pixel that is used to generate the prediction signal; and,
reading the correction matrix information selected and determining a weight coefficient indicating a ratio at which the prediction target pixel is corrected based on the intra-prediction mode.