Title:
INTRA-PREDICTION MODE DETERMINATION DEVICE, METHOD, AND PROGRAM RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2013/125171
Kind Code:
A1
Abstract:
An objective of the present invention is to ease the problem of a specific coding noise pattern being seen as a pattern overlaid on a specific site in an image, and to implement good subjective image quality. This intra-prediction mode determination device comprises: a prediction image generator unit which, employing coded pixels in a prescribed range from a block of a prescribed size to be coded, which an image to be coded has been segmented into, predicts a pixel value for each of a plurality of intra-prediction modes, and generates a plurality of prediction images; a difference image cost calculator unit which computes an error quantity cost for the block to be coded and each of the plurality of prediction images; an offset cost establishment unit which, for each of the plurality of intra-prediction modes, establishes an offset cost which changes with the progress of the image frame; a cost computation unit which, employing the error quantity cost and the offset cost, carries out a prescribed operation, computing an evaluation cost; and a mode selector unit which selects the intra-prediction mode on the basis of the evaluation cost.
Inventors:
MORIYOSHI TATSUJI (JP)
Application Number:
PCT/JP2013/000752
Publication Date:
August 29, 2013
Filing Date:
February 13, 2013
Export Citation:
Assignee:
NEC CORP (JP)
MORIYOSHI TATSUJI (JP)
MORIYOSHI TATSUJI (JP)
International Classes:
H04N7/32
Foreign References:
| JP2005318468A | 2005-11-10 | |||
| JP2009510935A | 2009-03-12 | |||
| JP2008193501A | 2008-08-21 | |||
| JP2005348008A | 2005-12-15 |
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
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Claims: