Title :
A hierarchical image transmission system in a fading channel
Author :
Morimoto, Masakazu ; Okada, Minoru ; Komaki, Shozo
Author_Institution :
Dept. of Electr. Eng., Osaka Univ., Japan
Abstract :
This paper proposes a new mobile image transmission system based on the hierarchical modulation scheme for achieving a high quality and high speed digital image transmission in a band-limited fading channel. The proposed system uses a hierarchical QAM (quadrature amplitude modulation) scheme to give unequal transmission reliability depending on the importance of DCT (discrete cosine transform)-based compressed images. Numerical analysis shows that the proposed system is an effective high-quality and high-speed image transmission technique in a fading channel
Keywords :
Rayleigh channels; data communication; data compression; digital radio; discrete cosine transforms; image coding; land mobile radio; quadrature amplitude modulation; telecommunication network reliability; visual communication; DCT; QAM; band-limited fading channel; compressed images; discrete cosine transform; hierarchical image transmission system; hierarchical modulation; high quality; high speed digital image transmission; mobile image transmission; quadrature amplitude modulation; transmission reliability; Bandwidth; Discrete cosine transforms; Fading; Frequency; Image coding; Image communication; Mobile communication; Modulation coding; Quadrature amplitude modulation; Source coding;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.497113
