The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2013
Filed:
Jul. 19, 2006
Hae Chul Choi, Daejeon, KR;
Jae Gon Kim, Daejeon, KR;
Jin Woo Hong, Daejeon, KR;
Sung-jea Ko, Seoul, KR;
Hae Chul Choi, Daejeon, KR;
Jae Gon Kim, Daejeon, KR;
Jin Woo Hong, Daejeon, KR;
Sung-Jea Ko, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
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 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.