Sequential gradient estimation predictor for speech signals. - Cumhur Cengiz Evci; Raymond Steele; Costas S. Xydeas (ICASSP, 1979)

Envelope Dynamic Ratio Quantizer. - Costas S. Xydeas; M. N. Faruqui; Raymond Steele (IEEE Trans. Commun., 1980)

Wideband quality speech encoders with bit rates of 16-32 kbits/s. - P. J. Patrick; Costas S. Xydeas; Raymond Steele; Wai-kuen Cham (ICASSP, 1981)

A comparative study of DPCM-AQF speech coders for bit rates of 16-32 kb/s. - Costas S. Xydeas; Cumhur Cengiz Evci (ICASSP, 1982)

Sequential Adaptive Predictors for ADPCM Speech Encoders. - Costas S. Xydeas; Cumhur Cengiz Evci; Raymond Steele (IEEE Trans. Commun., 1982)

Frequency compression of 7.6 kHz speed into 3.3 kHz bandwidth. - P. J. Patrick; Raymond Steele; Costas S. Xydeas (ICASSP, 1983)

Frequency Compression of 7.6 kHz Speech Into 3.3 kHz Bandwidth. - P. J. Patrick; Raymond Steele; Costas S. Xydeas (IEEE Trans. Commun., 1983)

Split-Band Coding of Speech Signals Using A Transform Technique. - F. S. Yeoh; Costas S. Xydeas (ICC (3), 1984)

Embedding Data Into Pictures by Modulo Masking. - Costas S. Xydeas; Branko Kostic; Raymond Steele (IEEE Trans. Commun., 1984)

Coding Scheme for Scanned Images of Handwriting and Graphics. - Costas S. Xydeas; Murray J. J. Holt (ICC, 1986)

On improving vector excitation coders through the use of spherical lattice codebooks (SLCs). - Mark Ireton; Costas S. Xydeas (ICASSP, 1989)

A novel graph-theoretic texture segmentation algorithm. - H. Ahmed; C. N. Daskalakis; Costas S. Xydeas (ICASSP, 1991)

The Manchester Multimedia Information System. - Carole A. Goble; Michael O'Docherty; Peter Crowther; Mark Ireton; John P. Oakley; Costas S. Xydeas (EDBT, 1992)

A long history quantization approach to scalar and vector quantization of LSP coefficients. - Costas S. Xydeas; K. K. M. So (ICASSP (2), 1993)

Conversion of scanned documents to the open document architecture. - Gary S. D. Farrow; Costas S. Xydeas; John P. Oakley (ICASSP (5), 1994)

Evaluation of an Application-Independent Image Information System. - John P. Oakley; Darryl N. Davis; Richard T. Shann; Costas S. Xydeas (Storage and Retrieval for Image and Video Databases (SPIE), 1994)

Detecting the skew angle in document images. - Gary S. D. Farrow; Mark Ireton; Costas S. Xydeas (Signal Process. Image Commun., 1994)

Efficient coding of LSP parameters using split matrix quantisation. - Costas S. Xydeas; Charalampos Papanastasiou (ICASSP, 1995)

Model matching in intelligent document understanding. - Gary S. D. Farrow; Costas S. Xydeas; John P. Oakley (ICDAR, 1995)

Robust speech recognition using fuzzy matrix quantisation, neural networks and Hidden Markov models. - Costas S. Xydeas; Lin Cong (EUSIPCO, 1996)

Source driven variable bit rate prototype interpolation coding. - Costas Xydeas; Binshi Cao (ICASSP, 1996)

Pitch synchronous multi-band (PSMB) coding of speech signals. - Haiyun Yang; Soo-Ngee Koh; Pratab Sivaprakasapillai; Costas Xydeas (Speech Commun., 1996)

A comparison of system architectures for intelligent document understanding. - Gary S. D. Farrow; Costas S. Xydeas; John P. Oakley; A. Khorabi; Nuria González-Prelcic (Signal Process. Image Commun., 1996)

Efficient mixed excitation models in LPC based prototype interpolation speech coders. - Charalampos Papanastasiou; Costas S. Xydeas (ICASSP, 1997)

A novel 1.7/2.4 kb/s DCT based prototype interpolation speech coding system. - Costas S. Xydeas; Gokhan H. Ilk (EUROSPEECH, 1997)

Multicodebook vector quantization of LPC parameters. - Costas S. Xydeas; Thomas M. Chapman (ICASSP, 1998)

Segmental prototype interpolation coding. - Costas S. Xydeas; Thomas M. Chapman (ICASSP, 1999)

Secondary codebook storage quantisation. - Thomas M. Chapman; Costas S. Xydeas (EUROSPEECH, 1999)

Split matrix quantization of LPC parameters. - Costas S. Xydeas; Charalampos Papanastasiou (IEEE Trans. Speech Audio Process., 1999)

Adaptive Web-based Engine for the Evaluation of eLearning Resources. - Lampros K. Stergioulas; Hassan Ahmed; Costas S. Xydeas (J. Educ. Technol. Soc., 2002)

Modeling the Behaviors of Players in Competitive Environments. - Shih-Yang Chiao; Costas S. Xydeas (IAT, 2003)

Total Quality Management for Electronic Educational Markets. - Lampros K. Stergioulas; Hassan Ahmed; Costas S. Xydeas; Bernd Simon (ICALT, 2003)

Model-based packet loss concealment for AMR coders. - Costas S. Xydeas; Fotis Zafeiropoulos (ICASSP (1), 2003)

Classification of Decision-Behavior Patterns in Multivariate Computer Log Data Using Independent Component Analysis. - Serafeim Fragos; Lampros K. Stergioulas; Costas S. Xydeas (KES, 2003)

Sensor noise effects on signal-level image fusion performance. - Vladimir S. Petrovic; Costas S. Xydeas (Inf. Fusion, 2003)

Evaluation of Image Fusion Performance with Visible Differences. - Vladimir S. Petrovic; Costas S. Xydeas (ECCV (3), 2004)

On-line identification of MIMO evolving Takagi- Sugeno fuzzy models. - Plamen Angelov 001; Costas Xydeas; Dimitar P. Filev (FUZZ-IEEE, 2004)

Behavior Modeling Using a Hierarchical HMM Approach. - Shih-Yang Chiao; Costas S. Xydeas (HIS, 2004)

Gradient-based multiresolution image fusion. - Vladimir S. Petrovic; Costas S. Xydeas (IEEE Trans. Image Process., 2004)

Objective Image Fusion Performance Characterisation. - Vladimir S. Petrovic; Costas S. Xydeas (ICCV, 2005)

Advances in classification of EEG signals via evolving fuzzy classifiers and dependant multiple HMMs. - Costas S. Xydeas; Plamen Angelov 001; Shih-Yang Chiao; M. Reoullas (Comput. Biol. Medicine, 2006)

Fuzzy systems design: direct and indirect approaches. - Plamen Angelov 001; Costas S. Xydeas (Soft Comput., 2006)

A Retrospective Comparative Study of Three Data Modelling Techniques in Anticoagulation Therapy. - Simon McDonald; Costas S. Xydeas; Plamen Angelov 001 (BMEI (1), 2008)

Decision Support Systems: Improving Levels of Care and Lowering Costs in Anticoagulation Therapy. - Simon McDonald; Costas S. Xydeas; Plamen Angelov 001 (eHealth, 2008)

A Passive Approach to Autonomous Collision Detection and Avoidance. - Plamen Angelov 001; Cosmin Danut Bocaniala; Costas S. Xydeas; Charles Patchett; Darren Ansell; Michael Everett; Gang Leng (UKSim, 2008)

Use of cubic Bézier curves for route planning. - Costas Xydeas; Colin J. Brown (EUSIPCO, 2011)

Information driven approach for sensor positioning in wireless sensor networks. - Arshad Ali 001; Costas Xydeas; Lyudmila Mihaylova; El Hadji Amadou Gning (GI-Jahrestagung, 2011)

On Improving Image Segmentation. - Asmar A. Khan; Costas Xydeas; Hassan Ahmed (SITIS, 2011)

Probabilistic Multimodal Classification with dynamic feature selection. - Asmar A. Khan; Costas Xydeas; Hassan Ahmed (FUSION, 2013)

Multi-Component/Multi-Model AAM framework for face image modeling. - Muhammad Aurangzeb Khan; Costas Xydeas; Hassan Ahmed (ICASSP, 2013)

Hierarchical Classification Fusion framework. - Asmar A. Khan; Costas Xydeas; Hassan Ahmed (ICASSP, 2013)

Multi-model AAM framework for face image modeling. - Muhammad Aurangzeb Khan; Costas S. Xydeas; Hassan Ahmed (DSP, 2013)

Using macroscopic information in image segmentation. - A. A. Khan; Costas S. Xydeas; H. Ahmed (IET Image Process., 2013)

On the application of AAM-based systems in face recognition. - Muhammad Aurangzeb Khan; Costas S. Xydeas; Hassan Ahmed (EUSIPCO, 2014)

Three-Dimensional UAV Routing With Deconfliction. - Sohail Razzaq; Costas Xydeas; Michael Everett; Anzar Mahmood; Thamer Alquthami (IEEE Access, 2018)