A fractal video communicator

Author

Streit, J. ; Hanzo, L.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

fYear

1994

fDate

8-10 Jun 1994

Firstpage

1030

Abstract

The image quality and compression ratio trade-offs of five different 176×144 pels quarter common intermediate format (QCIF) fractal image codecs are investigated by simulation. The average peak signal-to-noise ratio (PSNR) ranges from 29 dB to 37 dB, while the coding rate ranges from 0.24 bit/pel (bpp) to 1.22 bit/pel. Two of the candidate codecs, a 0.28 bit/pel and a 1.1 bit/pel codec, were subjected to bit-sensitivity analysis and protected by the source-sensitivity matched shortened binary BCH (122,80,6) and BCH (122,52,11) codes and transmitted using coherent pilot symbol assisted (PSAM) square-constellation 16-level quadrature amplitude modulation (16-QAM). The proposed fractal video communicators required a channel signal-to-noise ratio (SNR) and signal-to-interference ratio (SIR) of about 15 dB in order to maintain a video peak SNR (PSNR) of 31 dB and 35 dB at signaling rates of 39 kBaud and 156 kBaud, respectively, over Rayleigh-fading channels having a propagation frequency of 1800 MHz and a pedestrian speed of 2 mph

Keywords

BCH codes; Rayleigh channels; data compression; fading; fractals; image coding; quadrature amplitude modulation; time-varying channels; transceivers; video coding; videotelephony; BCH (122,52,11); BCH (122,80,6); PSAM; Rayleigh-fading channels; bit-sensitivity analysis; coding rate; coherent pilot symbol assisted square-constellation 16-QAM; fractal video communicator; image codecs; image compression; image quality; propagation frequency; quarter common intermediate format; signal-to-interference ratio; signaling rates; source-sensitivity matched shortened binary BCH; video peak SNR; Codecs; Fractals; Image coding; Image quality; PSNR; Protection; Quadrature amplitude modulation; Rayleigh channels; Signal to noise ratio; Video compression;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1994 IEEE 44th

Conference_Location

Stockholm

ISSN

1090-3038

Print_ISBN

0-7803-1927-3

Type

conf

DOI

10.1109/VETEC.1994.345248

Filename

345248