Title:
VIDEO ENCODING METHOD AND DEVICE AND VIDEO DECODING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/138761
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to improve compression efficiency of an image by determining a differential quantization parameter of a current block on the basis of statistical information of original samples of the current block or samples restored prior to the current block. An image decoding method comprises: receiving a bitstream; acquiring a quantization parameter prediction value, and a quantized transform coefficient of a current block from the bitstream; acquiring a differential quantization parameter of the current block on the basis of statistical information of samples restored prior to the current block; acquiring a quantization parameter of the current block on the basis of the differential quantization parameter of the current block and the quantization parameter prediction value; and dequantizing the quantized transform coefficient of the current block on the basis of the quantization parameter of the current block.
Inventors:
KIM JAE-HWAN (KR)
LEE JONG-SEOK (KR)
PARK YOUNG-O (KR)
LEE JONG-SEOK (KR)
PARK YOUNG-O (KR)
Application Number:
PCT/KR2017/001467
Publication Date:
August 17, 2017
Filing Date:
February 10, 2017
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO LTD (KR)
International Classes:
H04N19/124; H04N19/136; H04N19/176; H04N19/196
Foreign References:
| KR20120030537A | 2012-03-28 | |||
| JP2013138361A | 2013-07-11 | |||
| KR20140110008A | 2014-09-16 | |||
| KR20140088099A | 2014-07-09 | |||
| US20080187042A1 | 2008-08-07 |
Other References:
See also references of EP 3407606A4
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
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