Title:
IMAGE CODING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/104011
Kind Code:
A1
Abstract:
In order to obtain an image coding apparatus with which it is possible to improve the image quality of an important region without exceeding a predetermined bit rate, this image coding apparatus is characterized by being provided with: a frame memory unit that sorts input image signals from input order into coding order; an image coding unit that codes the image signals output from the frame memory unit using intra-frame prediction, inter-frame prediction, and variable-length coding; a transmission buffer unit that accumulates data coded by the image coding unit and transmits the data at a predetermined bit rate; and a specific-region rate control unit to which information regarding a specific region is input, that controls quantization steps inside and outside the specific region so that the coded data falls within the predetermined bit rate, and that transmits information regarding the quantization steps to the image coding unit.
Inventors:
NEMOTO AYAKO (JP)
Application Number:
PCT/JP2015/085146
Publication Date:
June 22, 2017
Filing Date:
December 16, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04N19/124; H04N19/152; H04N19/176
Foreign References:
| JP5593468B1 | 2014-09-24 | |||
| JP2005295379A | 2005-10-20 | |||
| JP2001313943A | 2001-11-09 | |||
| JP2011146883A | 2011-07-28 | |||
| JP2000078588A | 2000-03-14 | |||
| JP2009027493A | 2009-02-05 | |||
| JP2015162844A | 2015-09-07 | |||
| JP2000197050A | 2000-07-14 |
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
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