Antony Rix - Papers

Journals and other publications

Many of these papers may be downloaded from Psytechnics.

Rix, A. W., Bourret, A. and Hollier, M. P. Modelling human perception. BT Technology Journal, 17 (1), 24-34, January 1999.

Rix, A. W., Beerends, J. G., Hollier, M. P. and Hekstra, A. P. Perceptual Evaluation of Speech Quality (PESQ), an objective method for end-to-end speech quality assessment of narrowband telephone networks and speech codecs. ITU-T recommendation P.862, February 2001.

Reynolds, R. J. B. and Rix, A. W. Quality VoIP - an engineering challenge. BT Technology Journal, 19 (2), 23-32, April 2001.

Reynolds, R. J. B. and Rix, A. W. Achieving VoIP voice quality. In Swale, R. (ed), Voice over IP: systems and solutions, 29-49. IEE, December 2001.

Rix, A. W., Hollier, M. P., Hekstra, A. P. and Beerends, J. G. Perceptual Evaluation of Speech Quality (PESQ), the new ITU standard for end-to-end speech quality assessment, part I - time-delay compensation. Journal of the Audio Engineering Society, 50 (10), 755-764, October 2002.

Beerends, J. G., Hekstra, A. P., Rix, A. W. and Hollier, M. P. Perceptual Evaluation of Speech Quality (PESQ), the new ITU standard for end-to-end speech quality assessment, part II - psychoacoustic model. Journal of the Audio Engineering Society, 50 (10), 765-778, October 2002.

Kim, D.-S., Beerends, J. G., Ghitza, O., Kroon, P. and Rix, A. W. Introduction to the Special Section on Objective Quality Assessment of Speech and Audio. IEEE Transactions on Audio, Speech and Language Processing, 14 (6), 1889, November 2006.

Rix, A. W., Beerends, J. G., Kim, D.-S., Kroon, P. Ghitza, O. Objective Assessment of Speech and Audio Quality - Technology and Applications. IEEE Transactions on Audio, Speech and Language Processing, 14 (6), 1890-1901, November 2006.

Invited presentations

Rix, A. W. Perceptual modelling in communications. Signal Processing group, Cambridge University Engineering Department, April 1998.

Rix, A. W. Perceptual techniques for audio quality assessment. Signals and Systems group, University of Edinburgh, May 1998.

Rix, A. W. Robust perceptual assessment of end-to-end audio quality. Bell Laboratories, Murray Hill NJ, September 1999.

Rix, A. W. End-to-end speech quality assessment of networks. Pulver.com VON, Atlanta, September 2000.

Rix, A. W. Speech quality assessment for communications networks. Texas Instruments, Dallas, September 2000.

Rix, A. W. Testing and monitoring VoIP speech quality. Presented paper and chaired session. Pulver.com VON Developers, Boston, July 2001.

Rix, A. W. and Barrett, P. A. Why speech quality is important: an introduction to objective speech quality measurement. Performance and Quality Management for Next Generation Mobile Networks (Marcus Evans conferences), London, May 2002.

Rix, A. W. Subjective wideband speech quality and modelling issues. ETSI STQ/ITU Workshop on wideband speech quality in terminals and networks: assessment and prediction. Mainz, July 2004.

Rix, A. W. Perceptual wideband speech and audio quality measurement. ETSI STQ/ITU Workshop on wideband speech quality in terminals and networks: assessment and prediction. Mainz, July 2004.

Refereed conference papers

Rix, A. W., Reynolds, R. J and Hollier, M. P. Robust end to end perceptual quality assessment of audio communication over packet-based networks. IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA'99), New Paltz NY, pp 39-42, October 1999.

Rix, A. W. and Hollier, M. P. The perceptual analysis measurement system for robust end-to-end speech quality assessment. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Istanbul, (3), 1515-1518, June 2000.

Rix, A. W., Beerends, J. G., Hollier, M. P. and Hekstra, A. P. Perceptual Evaluation of Speech Quality (PESQ) - a new method for speech quality assessment of telephone networks and codecs. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Salt Lake City, (2), 749-752, May 2001.

Rix, A. W. Comparison between subjective listening quality and P.862 PESQ score. Measurement of Speech and Audio Quality in Networks (MESAQIN'03), May 2003.

Goldstein, T. and Rix, A. W. Perceptual speech quality assessment in acoustic and binaural applications. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Montreal, (3), 1064-1067, May 2004.

Rix, A. W. Perceptual speech quality assessment - a review. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Montreal, (3), 1056-1059, May 2004.

Standards contributions

These papers are only available to ITU-T members and may be downloaded direct from ITU-T.

Rix, A. W. and Hollier, M. P. Robust design methodology for telephony assessment models. ITU-T delayed contribution COM12-D031, February 1998.

Rix, A. W., Beamond, E. J., Hollier, M. P. and Gray, P. Performance metrics for objective quality assessment systems in telephony. ITU-T delayed contribution COM12-D079, November 1998.

Rix, A. W. and Hollier, M. P. Comparison of speech quality assessment algorithms: BT PAMS, PSQM, PSQM+ and MNB. ITU-T delayed contribution COM12-D080, November 1998.

Rix, A. W. Comparison of opinion scales for subjective listening tests. ITU-T delayed contribution COM12-D102, September 1999.

Rix, A. W., Hekstra, A. P., Beerends, J. G. and Hollier, M. P. Performance of the integrated KPN/BT objective speech quality assessment model. ITU-T delayed contribution COM12-D136, April 2000.

Hekstra, A. P. and Rix, A. W. New C source code implementation of PESQ. ITU-T delayed contribution COM12-D137, May 2000.

Beerends, J. G., Rix, A. W., Hekstra, A. P. and Hollier, M. P. Proposed draft recommendation P.86x: Perceptual Evaluation of Speech Quality (PESQ), an objective method for end-to-end speech quality assessment of narrowband telephone networks and speech codecs. ITU-T delayed contribution COM12-D140, April 2000.

Beerends, J. G., Rix, A. W., Hekstra, A. P. and Hollier, M. P. Results of the PESQ (perceptual evaluation of speech quality) algorithm using speech like test signals. ITU-T delayed contribution COM12-D141, May 2000.

Rix, A. W. Results of quality assessment of wideband speech using PAMS. ITU-T delayed contribution COM12-D001, January 2001.

Beerends, J. H., Hekstra, A. P., Rix, A. W. and Hollier, M. P. Proposal for the use of draft recommendation P.862, the Perceptual Evaluation of Speech Quality (PESQ), for measurements in the acoustic domain with background masking noise. ITU-T delayed contribution COM12-D006, February 2001.

Rix, A. W., Beerends, J. G., Hekstra, A. P. and Hollier, M. P. Proposed modification to draft P.862 to allow PESQ to be used for quality assessment of wideband speech. ITU-T delayed contribution COM12-D007, February 2001.

Rix, A. W. Application of P.862 to evaluation of quality of noise reduction and noise processing algorithms. ITU-T delayed contribution COM12-D045, October 2001.

Rix, A. W. Assessment of speech quality and conversation quality of VQE and its interaction with the network. ITU-T delayed contribution COM12-D046, October 2001.

Rix, A. W. Extension of P.862 to provide a framework for VQE diagnostics. ITU-T delayed contribution COM12-D047, October 2001.

Barrett, P.A. and Rix, A. W. Verification of floating-point implementation of AMR-WB using Wideband-PESQ. 3GPP S4 (02) 0049, Feb. 2002.

Rix, A. W. P.AAM standardisation process. ITU-T delayed contribution COM12-D083, May 2002.

Rix, A. W. A new PESQ-LQ scale to assist comparison between P.862 PESQ score and subjective MOS. ITU-T delayed contribution COM12-D086, May 2002.

Rix, A. W. Proposed Implementer's Guide to Recommendation P.862. ITU-T contribution COM12-52, November 2002.

Beerends, J. G., Berger, J. and Rix, A. W. Testplan for the benchmarking of mouth-to-ear speech quality assessment algorithms including terminals. ITU-T delayed contribution COM12-D091, January 2003.

Beerends, J. G., Berger, J. and Rix, A. W. Preliminary Results for the P.AAM benchmark models. ITU-T delayed contribution COM12-D109, January 2003.

Rix, A. W. and Barrett, P. A. Analysis of the G.722.2/AMR-WB codec using Wideband PESQ. ITU-T delayed contribution COM12-D122, January 2003.

Rix, A. W. Analysis of P.862 PESQ scores using PESQ-LQ and alternative logistic mapping. ITU-T delayed contribution COM12-D124, January 2003.

Goldstein, T., Beerends, J. A. and Rix, A. W. Draft Recommendation P.AAM: An objective method for end-to-end speech quality assessment ofnarrow-band telephone networks including acoustic terminal(s). ITU-T contribution COM12-C64, July 2003.

Huynh-Thu, Q., Stephenson, M. and Rix, A. W. Video quality assessment. ETSI STQ-Mobile 01TD22, December 2003.

Rix, A. W. Electrical interfaces to mobile telephone handsets for quality assessment using P.862. ITU-T delayed contribution COM12-D203, March 2004.

Huynh-Thu, Q. and Rix, A. W. Subjective Video Quality Assessment Methods for Multimedia Applications. ITU-T delayed contribution COM9-D108, May 2004.

Other reports and papers

Rix, A. W., Hollier, M. P. and Gray, P. Predicting speech quality of telecommunications systems in a quality differentiated market. 6th IEE Conference in Telecomms (ICT'98), Edinburgh. IEE Conference Publication 451, 156-160, March 1998.

Rix, A. W. and Hunt, T. J. PAMS Trial Evaluation. BT Systems Engineering document 421b02/T/007, March 1998.

Rix, A. W., Reynolds, R. J. B. and Hollier, M. P. Perceptual measurement of end-to-end speech quality over audio and packet-based networks. 106th AES Convention, Munich, preprint 4873, May 1999.

Rix, A. W. and Hollier, M. P. Perceptual speech quality assessment from narrowband telephony to wideband audio. 107th AES Convention, New York, preprint 5018, September 1999.

Rix, A. W. Advances in objective quality assessment of speech over analogue and packet-based networks. IEE Data Compression colloquium, 99/150, November 1999.

Rix, A. W., Beerends, J. G., Hollier, M. P. and Hekstra, A. P. PESQ - the new ITU standard for end-to-end speech quality assessment. 109th AES Convention, Los Angeles, preprint 5260, September 2000.

Barrett, P. A. and Rix, A. W. Applications of speech quality measurement for 3G. IEE 3G Mobile Conference, paper 88, May 2002.

Rix, A. W., Berger, J. and Beerends, J.G. Perceptual quality assessment of telecommunications systems including terminals. AES 114th Convention, Amsterdam, preprint 5724, March 2003.

Rix, A. W. and Smith, K. UK Mobile Quality Survey. Psytechnics Limited, September 2003. http://www.psytechnics.com/

Rix, A. W. and Smith, K. US Mobile Quality Survey. Psytechnics Limited, March 2004. http://www.psytechnics.com/

Hands, D. S., Huynh-Thu, Q., Rix, A. W., Davis, A. G. and Voelcker, R. M. Objective perceptual quality measurement of 3G video services. IEE 3G Mobile Conference, paper 50, October 2004.

Patents

I have authored or co-authored over 20 patents and patent applications.