Transmission of Subband-Coded Images via Mobile Channels
Transmission of Subband-Coded Images via Mobile Channels
Abstract - The feasibility of a mobile video handset is investigated via Rayleigh-fading channels, where transmissions must be confined to the channel's coherence bandwidth to avoid the deployment of complex high-power-consumption channel equalizers. This necessitates the utilization of a low-bit-rate image codec error protected by embedded low-complexity Bose-Chaudhuri-Hoequenghem (BCH) codecs and spectrally efficient 16-level quadrature amplitude modulation (16-QAM). Motion-compensated onuniform 7-band subband coding (SBC) with subband-specific scanning, adaptive quantization (Q), run-length coding (RLO, and adaptive buffering to equalize bit-rate fluctuations offer good objective and subjective image quality at moderate complexity and a bit rate of 55 kbit/s. Using a twin-class embedded-BCH error protection as well as pilot symbol and diversity-assisted 16-QAM, our 22-kBd candidate system yields unimpaired image quality for average channel signal-to-noise ratios (SNR) in excess of about 16-18 dB, when the mobile speed is 4 mi/h, an SNR value readily maintained in personal-communications mobile systems characterized by small cells.
15-26
Stedman, R
d571195a-faa1-4d08-9986-845f22e2d4f7
Gharavi, H
12285106-e031-4cdd-8fc5-38dae847f3ab
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Steele, R
7035a3e5-8a4c-434b-a105-46fe2d63d5c3
February 1993
Stedman, R
d571195a-faa1-4d08-9986-845f22e2d4f7
Gharavi, H
12285106-e031-4cdd-8fc5-38dae847f3ab
Hanzo, L
66e7266f-3066-4fc0-8391-e000acce71a1
Steele, R
7035a3e5-8a4c-434b-a105-46fe2d63d5c3
Stedman, R, Gharavi, H, Hanzo, L and Steele, R
(1993)
Transmission of Subband-Coded Images via Mobile Channels.
IEEE Transactions on Circuits and Systems for Video Technology, 3 (1), .
Abstract
Abstract - The feasibility of a mobile video handset is investigated via Rayleigh-fading channels, where transmissions must be confined to the channel's coherence bandwidth to avoid the deployment of complex high-power-consumption channel equalizers. This necessitates the utilization of a low-bit-rate image codec error protected by embedded low-complexity Bose-Chaudhuri-Hoequenghem (BCH) codecs and spectrally efficient 16-level quadrature amplitude modulation (16-QAM). Motion-compensated onuniform 7-band subband coding (SBC) with subband-specific scanning, adaptive quantization (Q), run-length coding (RLO, and adaptive buffering to equalize bit-rate fluctuations offer good objective and subjective image quality at moderate complexity and a bit rate of 55 kbit/s. Using a twin-class embedded-BCH error protection as well as pilot symbol and diversity-assisted 16-QAM, our 22-kBd candidate system yields unimpaired image quality for average channel signal-to-noise ratios (SNR) in excess of about 16-18 dB, when the mobile speed is 4 mi/h, an SNR value readily maintained in personal-communications mobile systems characterized by small cells.
Text
3csvt01stedman.pdf
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More information
Published date: February 1993
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 251398
URI: http://eprints.soton.ac.uk/id/eprint/251398
PURE UUID: d20c2f23-553c-4352-a36f-2d6882bf53ff
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Date deposited: 03 Apr 2001
Last modified: 18 Mar 2024 02:32
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Contributors
Author:
R Stedman
Author:
H Gharavi
Author:
L Hanzo
Author:
R Steele
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