Title :
Subband coding with multistage VQ for wireless image communication
Author :
Jang, Euee S. ; Nasrabadi, Nasser M.
Author_Institution :
Dept. of Electr. & Comput. Eng., State Univ. of New York, Buffalo, NY, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
A subband multistage vector quantization (SB-MSVQ) coding technique is proposed for wireless image communication. The Digital European Cordless Telecommunications (DECT) system has been used as a wireless communication environment. The impact of channel fading on the SB-MSVQ coding technique is investigated and its performance is compared with that of the baseline JPEG standard. Simulation results show that the proposed technique, SB-MSVQ, is very robust to channel fading errors even at a very low channel power, whereas the baseline JPEG suffers from channel fading errors which are visually very annoying. Due to the inherent structure of SB-MSVQ, the important low frequency information of an image is packed into a small portion of the encoded data. If this portion is received intact by the SB-MSVQ decoder, the overall quality degradation of the reconstructed image is marginal
Keywords :
code standards; cordless telephone systems; fading; image reconstruction; land mobile radio; telecommunication standards; vector quantisation; videotelephony; DECT system; Digital European Cordless Telecommunications; SB-MSVQ coding; SB-MSVQ decoder; baseline JPEG standard; channel fading; channel fading errors; encoded data; image reconstruction; low frequency information; multistage VQ; performance; quality degradation; simulation results; subband coding; very low channel power; wireless communication environment; wireless image communication; Decoding; Degradation; Fading; Frequency; Image coding; Image communication; Image reconstruction; Robustness; Vector quantization; Wireless communication;
Journal_Title :
Circuits and Systems for Video Technology, IEEE Transactions on
