Publications

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Ph.D. Thesis

A. Ortega, "Optimization techniques for adaptive quantization of image and video under delay constraints", Ph.D. Thesis, Dept. of Electrical Engineering, Columbia University, Jun. 1994


Complete set of PhD theses can be found here


Journal Publications


Book Chapters

  • A. Ortega, "Video transmission over ATM networks", in Microsystems Technology for Multimedia Applications, B. Sheu et al. Eds., IEEE Press, May 1995.
  • A. Ortega and M. Khansari, "Video Transmission over Wireless Links: State of the Art and Future Challenges", in Handbook of Communication Technologies: The Next Decade , R. Osso, Ed., CRC Press, 1999.
  • A. Ortega, ""Variable Bit-rate Video Coding ", in Compressed Video over Networks , M.-T. Sun and A.~R. Reibman, Eds, pp. 343-382, Marcel Dekker, New York, NY, 2000.
  • A. Ortega and Y. Liu, "Lossy Compression of Haptic Data", in Touch in Virtual Environments, M. McLaughlin, Ed., IMSC Press, Prentice-Hall, 2001.

Selected Refereed International Conferences

1993-94

1995

1996

1997

1998

1999

2000

2001

  • W. Pan, A. Ortega, I. Hajj-Ahmad and R.Sannino, "Proxy-Based Aopproaches for IDCT Accleration", VCIP 2001, San Jose, CA, Jan 2001.
  • H.Xie and A.Ortega,"Feature representation and Compresion for content based retrieval", VCIP 2001, San Jose, CA, Jan 2001.
  • N.Srinivasmurthy and A.Ortega,"Joint Compression-Classification with Quantizer/Classifier Dimension Mismatch",VCIP 2001, San Jose, CA, Jan 2001.
  • B. Beferull-Lozano and A.Ortega, "Construction of Low Complexity Regular Quantizers for Over-Complete Expansions in R^n ", In Proc. of DDC 2001, Snowbird, UT, Mar. 2001.
  • B. Beferull-Lozano and A.Ortega,"Efficient Quantizers for Over Complete Expansion in Rexp(N), in Proc. of ICASSP 2001, Salt Lake City, UT, May 2001.
  • J.Chou, K. Ramachandran and A. Ortega,"High Capacity Audio Data Hiding for Nosiy Channel", in Proc. of ICASSP 2001, Salt Lake City, UT, May 2001.
  • H. Komi and A. Ortega," Analysis of Cache Efficiency in 2D Wavelet Transform", in Proc. IEEE Intl. Conference on Multimedia and Expo, ICME 2001, Tokoyo, Japan, Aug 2001.
  • P. Sagetong and A. Ortega," Analytical Model-Based Bit Allocation for Wavelet Coding with Application to Multiple Description Coding and Region of Interest Coding ", in Proc. IEEE Intl. Conf. on Multimedia and Expo., ICME 2001, Tokoyo, Japan, Aug. 2001.
  • W. Jiang and A. Ortega,"A novel packet loss recovery technique for multimedia communication ", in Proc. of IEEE Intl. Conf. on Multimedia and Expo., ICME 2001, Tokyo, Japan Aug. 2001.
  • N.Srinivasmurthy, A. Ortega and S. Narayanan," Use of model transformation for distributed speech recognition",ISCA Workshop on Adaptation Methods for Speech Recognition, Sophia Antipolis, France, August 29-30, 2001.
  • N.Srinivasmurthy, A. Ortega and S. Narayanan,"Efficient Scalable Speech Compression for Scalable Speech Recognition ", In Proc. of Eurospeech 2001, Aarborg, Denmark, Sept. 2001.
  • D. Comas, R. Singh and A.Ortega," Rate-Distortion Optimization in a Robust Video Transmission Based on Unbalanced Multiple Description Coding", IEEE Worksop on Multimedia Signal Processing, MMSP01, Cannes, France, Oct. 2001.
  • S. Lee and A. Ortega," A Novel Approach for Image Compression in Digital Cameras with Bayer Color Filter Array", in Proc. of IEEE Intl. Conference on Image Processing,ICIUP '01, Thessaloniki,Greece, Oct. 2001.
  • J. Cabrera, A. Ortega and J.I.Ronda,"Stochastic Rate-Control of Video Coders for Wireless Channels", in Proc. of IEEE Intl. Conference on Image Processing, ICIP' 01, Thessaloniki, Greece, Oct. 2001.
  • P. Thiennviboon, A. Ortega and K. M.Chugg,"Simplified Grid Passing Algorithm with Application to Digital Image Halftoning ", in Proc. of IEEE Intl. Conference on Image Processing, ICIUP'01, Thessaloniki, Greece, Oct. 2001.
  • W. Pan and A. Ortega, "Buffer Control for Variable Complexity Fano Decoders ", Globecom 2001, San Antonio, TX, Nov. 2001.

2002

  • H. Chung, A. Ortega, A. A. Sawchuck, " Low Complexity Motion Estimation for Long Term Memory Motion Compensation", VCIP 2002, San Jose, CA, Jan 2002.
  • Z. Miao and A. Ortega, "Expected Run-Time Distortion Based Scheduling for Delivery of Scalable Media ", Packet Video Workshop 2002, Pittsburgh, PA, Jan. 2002.
  • R. Singh and A. Ortega,"Modeling Temporal Dependence in packet loss using universal modeling concepts", Packet Video Workshop 2002, Pittsburgh, PA.
  • L. Vasudevan and A. Ortega, "Processing-Aware Compression for Sensor Networks," 2nd IEEE Sensor Array and Multichannel Signal Processing Workshop, Aug. 2002.
  • J. Hespanha, A. Ortega and L. Vasudevan, "Towards the Control of Linear Systems with Minimum Bit-Rate ", 15th Intl. Symp. on Mathematical Theory of Networks and Systems, MTNS 2002, Notre Dame, IN, Aug. 2002.
  • P.Sagetong and A. Ortega," Rate Distortion Model and Analytical Bit Allocation for Wavelet based Region of Interest Coding", ICIP 2002, Oct. 2002.
  • H. Chung and A. Ortega," Low Compexity Motion Estimation Algorithm by Multiresolution Search for Long-Term Memory Motion Compensation", Submitted, ICIP 2002, Oct. 2002.
  • S. Y. Lee and A. Ortega," Optimal rate control for video coding based on a hybrid MMAX/MMSE criterion", ubmitted, ICIP 2002, Oct. 2002.
  • Z. Miao and A. Ortega,"Fast Adaptive Media Scheduling Based on Expected Run-Time Distortion", Proc. of Asilomar Conf. on Signals, Systems and Computers, Pacific Grove, CA, Nov. 2002.

2003