Title:
A METHOD AND DEVICE FOR REALIZING QUANTIZATION IN CODING-DECODING
Document Type and Number:
WIPO Patent Application WO/2007/104265
Kind Code:
A1
Abstract:
A method for realizing quantization in coding-decoding, includes the following
steps: first, for quantization of image transforming coefficient matrix, using
quantization form of parameter modeling, that is say modeling it to be a parameter
model form which is indicated only using several parameters, wherein the parameter
model include frequency band parameter distributing structure and a frequency
band parameter. A device for realizing quantization in coding-decoding is also
provided. In this way, a quantization matrix of according with visual character
of human eyes is obtained if only controlling several parameters, and subjective
quality of image of quantization decoded is controlled; second, the method needn't
saving and transmitting quantization matrix in code streams, thereby enhancing
code efficiency; final, the method is well fitted in content information character
of image for quantization calculating of image transforming coefficient. Therefore,
the invent may enhance subjective quality of image of quantization decoded.
Inventors:
ZHENG JIANHUA (CN)
CHEN JIANWEN (CN)
HE YUN (CN)
MENG XINJIAN (CN)
CHEN JIANWEN (CN)
HE YUN (CN)
MENG XINJIAN (CN)
Application Number:
PCT/CN2007/000862
Publication Date:
September 20, 2007
Filing Date:
March 16, 2007
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
UNIV TSINGHUA (CN)
ZHENG JIANHUA (CN)
CHEN JIANWEN (CN)
HE YUN (CN)
MENG XINJIAN (CN)
UNIV TSINGHUA (CN)
ZHENG JIANHUA (CN)
CHEN JIANWEN (CN)
HE YUN (CN)
MENG XINJIAN (CN)
International Classes:
H04N7/26
Foreign References:
| US6628709B2 | 2003-09-30 | |||
| US20040258318A1 | 2004-12-23 | |||
| CN1187730A | 1998-07-15 | |||
| CN1462555A | 2003-12-17 |
Other References:
See also references of EP 1995971A4
Attorney, Agent or Firm:
BEIJING CATALY IP ATTORNEY AT LAW (Room 902 Sidaokou Road 11, Haidian District Beijing 1, CN)
Download PDF: