Title :
Energy scalability in multimedia codec using NQDCT
Author :
Ming-Yan Chan ; Kok, Chi-Wah
Author_Institution :
Dept. Electr. Eng., Hong Kong Univ. of Sci. & Technol., China
Abstract :
The paper discusses a novel algorithm (new quantized DCT - NQDCT) that combines the DCT with the quantizer to achieve energy scalability in a DCT based multimedia codec. A thorough analysis of the algorithm is presented. Simulation results show that a 15% reduction in computational energy can be obtained in an implementation of an MPEG coder over a wide range of bit-rate when compared to that of the standard MPEG coder test model.
Keywords :
codecs; discrete cosine transforms; multimedia systems; quantisation (signal); video coding; MPEG coder; energy scalability; multimedia codec; quantized DCT; Algorithm design and analysis; Bit rate; Codecs; Discrete cosine transforms; Energy conservation; Energy consumption; MPEG 4 Standard; Multimedia systems; Quantization; Scalability;
Conference_Titel :
Image Processing, 2004. ICIP '04. 2004 International Conference on
Print_ISBN :
0-7803-8554-3
DOI :
10.1109/ICIP.2004.1418789
