Title :
Practical implementation of subband DCT based coder
Author :
Tan, Ee-Leng ; Gan, Woon-Seng ; Wong, Meng-Tong
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
At low bit rate, JPEG compression scheme is known for blocking artifacts due to the quantization of the high order discrete cosine transform (DCT) coefficients. This artifact can be minimized by the application of subband coding. In this paper, we discuss the implementation of a class of subband image coding scheme referred as the subband DCT (SBDCT). Since SBDCT is derived from the DCT algorithm, it is possible to adapt the output bitstream to be decodable by any JPEG decoders. Results show that an efficient and scalable image coding scheme is achievable when implemented with a fixed point digital signal processor (DSP).
Keywords :
data compression; discrete cosine transforms; image coding; JPEG compression scheme; discrete cosine transform; image coding scheme; subband DCT based coder; Bit rate; Decoding; Digital signal processing; Digital signal processors; Discrete cosine transforms; Image coding; Image quality; Image storage; Signal processing algorithms; Transform coding;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2005. ISPACS 2005. Proceedings of 2005 International Symposium on
Print_ISBN :
0-7803-9266-3
DOI :
10.1109/ISPACS.2005.1595452
