A wireless multimedia system

Hanzo, L., Stedman, R., Steele, R. and Cheung, J. C. S (1995) A wireless multimedia system. In, Proc. of 2nd International Workshop on Mobile Multimedia Communications, Bristol University, UK, 11 - 14 Apr 1995. , 1.6-1.8.


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The complexity, robustness, image and speech quality as well as packet multiplexing issues of a reconfigurable multi-media mobile communicator are addressed. The proposed moderate complexity motion-compensated Discrete Cosine Transform (DCT) based image communicator provides an image peak signal-to-noise ratio (PSNR) of 38 dB at an average bit rate of about 25 kbits/s. The speech codec used is a low-complexity 32 kbit/s CCITT G721 standard scheme. Bandwidth efficient 16 or 64level quadrature amplitude modulation (QAM) combined with embedded low-complexity binary Bose-Chaudhuri-Hocquenghem (BCH) forward error correction coding is deployed. The 20-slot packet reservation multiple access (PRMA) scheme used supports an extra 2.4 kbit/s low-rate data channel for each speech user, in addition to providing 5-6 video-phone channels. The ADPCM/DCT/BCH/16-QAM as well as 64QAM schemes provide nearly unimpaired speech and image quality for channel SNRs in excess of 30 dB and 38 dB, respectively.

Item Type: Conference or Workshop Item (Paper)
Additional Information: MoMuc-2 Event Dates: 11-14 April 1995 Address: Bristol, UK
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 251352
Date Deposited: 28 Oct 1999
Last Modified: 27 Mar 2014 19:52
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/251352

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