APPARATUS AND METHOD OF EMBEDDED QUANTIZATON FOR THE IMPROVED SNR SCALBILTY
摘要
<p>Provided are a method and apparatus for enhancing coding efficiency by performing encoding and decoding by optimally calculating quantization intervals and reconstruction values through a distribution of DCT coefficients of each frame, when DCT coefficients of each SNR enhancement layer are quantized in scalable video coding. The encoding apparatus includes: an R-D optimization unit performing Rate-Distortion (R-D) optimization based on a distribution of Discrete Cosine Transform (DCT) coefficients of each slice and calculating a first reference value and a second reference value respectively indicating a start point and an end point of DCT coefficients quantized to "0"; a quantization interval setting unit setting adaptive quantization intervals on the basis of a minimum value and a maximum value of the DCT coefficients, the first reference value, and the second reference value; and a mapping unit mapping the DCT coefficients to the adaptive quantization intervals.</p>
申请公布号
WO2007011160(A1)
申请公布日期
2007.01.25
申请号
WO2006KR02829
申请日期
2006.07.19
申请人
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE;KOREA UNIVERSITY INDUSTRY AND ACADEMY COOPERATIONFOUNDATION;CHOI, HAE-CHUL;KIM, JAE-GON;HONG, JIN-WOO;KO, SUNG-JE