Title :
Transmission of DCT-coded images by multicarrier modulation for noisy channels
Author :
Ho, Keang-Po ; Kahn, Joseph M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
We have proposed and analyzed a combined source-channel coding scheme using multicarrier modulation. By changing the power and modulation of subchannels carrying different bits of the quantized signal, the channel-induced distortion can be minimized. An algorithm for the subchannel power allocation is derived. For discrete cosine transform (DCT) coded images, multicarrier systems achieve more than a 9-dB improvement over single-carrier systems on very noisy channels
Keywords :
channel coding; discrete cosine transforms; image coding; modulation; noise; quantisation (signal); source coding; telecommunication channels; transform coding; visual communication; DCT coded image transmission; algorithm; channel induced distortion minimisation; combined source-channel coding; discrete cosine transform; multicarrier modulation; multicarrier systems; noisy channels; quantized signal; subchannel power allocation; subchannels; Additive noise; Bit error rate; Channel coding; Discrete cosine transforms; Distortion; Image reconstruction; Modulation coding; Power engineering computing; Source coding; Transmitters;
Conference_Titel :
Signals, Systems, and Electronics, 1995. ISSSE '95, Proceedings., 1995 URSI International Symposium on
Conference_Location :
San Francisco
Print_ISBN :
0-7803-2516-8
DOI :
10.1109/ISSSE.1995.497933
