Robust digital signal compression and modulation exploiting the advantages of analog communications

Author

Lervik, John M. ; Grøvlen, Asbjørn ; Ramstad, Tor A.

Author_Institution

Dept. of Telecommun., Norwegian Inst. of Technol., Trondheim, Norway

Volume

2

fYear

1995

fDate

14-16 Nov 1995

Firstpage

1044

Abstract

A visual communication system for power- and bandwidth-limited channels, which gracefully degrades as the channel deteriorates is presented. The system is based on joint optimization of subband coding and 81-QAM through robust mappings between the source coder space and the modulation space. A novel definition for measuring system efficiency, based on a comparison to pure analog transmission, is used to evaluate the proposed system. The ideas presented in this paper can be used for terrestrial digital TV broadcasting or mobile communications

Keywords

data compression; digital television; image coding; land mobile radio; modulation coding; quadrature amplitude modulation; telecommunication channels; television broadcasting; visual communication; 81-QAM; analog communications; analog transmission; bandwidth limited channels; digital signal compression; digital signal modulation; image coding; joint optimization; mobile communications; modulation space; power limited channels; robust mappings; source coder space; subband coding; system efficiency measurement; terrestrial digital TV broadcasting; visual communication system; Bandwidth; Codecs; Degradation; Digital modulation; Digital video broadcasting; Image coding; Mobile communication; Radio transmitters; Robustness; Standards development;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE

Print_ISBN

0-7803-2509-5

Type

conf

DOI

10.1109/GLOCOM.1995.502564

Filename

502564