Title :
A frequency scalable coding scheme employing pyramid and subband techniques
Author :
Tan, T.K. ; Pang, K.K. ; Ngan, K.N.
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, Vic., Australia
fDate :
4/1/1994 12:00:00 AM
Abstract :
A flexible layered coding scheme using block-based DCT domain decimation has been simulated in software. A conditional replacement scheme which switches adaptively between the pyramid and subband approaches at the coefficient level was studied. Experimental results comparing the adaptive scheme against the pyramid approach show that this new approach increases the overall coding efficiency of the scalable coder by up to 1 dB
Keywords :
block codes; codecs; discrete cosine transforms; image coding; image sequences; telecommunications computing; adaptive scheme; block-based DCT domain decimation; coding efficiency; coefficient level; conditional replacement scheme; frequency scalable coding scheme; pyramid technique; software; subband technique; B-ISDN; Bit rate; Computer architecture; Decoding; Frequency; HDTV; Propagation losses; Signal resolution; TV; Video on demand;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
