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


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Book Chapters

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  • 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.
  • A. Ortega and H. Wang, "Bandwidth Adaptation Mechanisms", in Multimedia networking and communications, P. A. Chou and M. Van der Schaar, Eds., Elsevier, 2007.

Selected Refereed International Conferences

1993-94

1995

1996

  • Youngjun Yoo, Antonio Ortega, and Kannan Ramchandran, ``A Novel Hybrid Technique for Discrete Rate-Distortion Optimization with Applications to Fast Codebook Search for SVQ , in Proc. of ICASSP'96, Atlanta, GA, May 1996.
  • Liang-Jin Lin, Antonio Ortega and C. C. Jay Kuo,``Cubic Spline Approximation of Rate and Distortion Functions for MPEG Video , In Proc. of IS\&T/SPIE, Digital Video Compression: Algorithms and Technologies '96, San Jose, Feb. 96.
  • Liang-Jin Lin, Antonio Ortega and C. C. Jay Kuo] ``Rate Control Using Spline-Interpolated R-D Characteristics , In Proc. of Visual Communic. and Image Proc., VCIP '96, Orlando, Fla, March 1996
  • Woontack Woo and Antonio Ortega, ``Stereo Image Compression with Disparity Compensation Using the MRF Model , In Proc. of Visual Communic. and Image Proc., VCIP '96, Orlando, Fla, March 1996
  • Y. Chung, C.-Y. Hsu, A. Ortega and J. Kuo, " A histogram based method for video-network interfaces in ATM networks", Packet Video Workshop'96, Brisbane, Australia, March 1996.
  • A. Ortega, "Optimal rate allocation under multiple rate constraints", Data Compression Conference'96, Snowbird, UT, Mar. 1996.
  • Y. Yoo, A. Ortega and B. Yu, "Adaptive Quantization of Image Subbands with Efficient Overhead Rate Selection". ICIP'96, Lausanne, Switzerland.
  • C. Chrysafis and A. Ortega, "Context-based Adaptive Image Coding". Proc. of the 30th Asilomar Conf. on Signals, Sys. and Computers, Pacific Grove, CA, Nov. 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

    2004

    • Alexandre Ciancio and Antonio Ortega,"Distributed Wavelet Compression Algorithm for Wireless Sensor Networks Based on Lifting", International Conference on Acoustics, Speech and Signal Processing (ICASSP'04), Montreal, May 2004.
    • Joaquin Lopez, Jae Hoon Kim, Antonio Ortega, and George Chen, "Block-based Illumination Compensation and Search Techniques for Multiview Video Coding," Picture Coding Symposium, San Francisco, CA, Dec. 2004.
      PDF format
    • Huisheng Wang, Ngai-Man Cheung and Antonio Ortega, "WZS: Wyner-Ziv Scalable Predictive Video Coding", Picture Coding Symposium (PCS) 2004 , Dec. 2004. PDF format
    • Huisheng Wang and Antonio Ortega, "Scalable Predictive Coding by Nested Quantization with Layered Side Information", IEEE International Conference on Image Processing (ICIP) , 2004. PDF format
    • L. Vasudevan, A. Ortega and U. Mitra, "Jointly Optimized Quantization and Time Delay Estimation for Sensor Networks", First Intl. Symposium on Control, Communications, and Signal Processing, Tunisia, March, 2004. PDF format

    2005

    • Alexandre Ciancio and Antonio Ortega,"Distributed Wavelet Compression Algorithm for Wireless Multihop Sensor Networks Based on Lifting", International Conference on Acoustics, Speech and Signal Processing (ICASSP'05), Philadelphia, Mar 2005.
    • Jae Hoon Kim, Jonathan Garcia, and Antonio Ortega, "Dependent Bit Allocation in Multiview Video Coding," in Proc. of IEEE International Conference on Image Processing (ICIP), Genoa, Italy, Sep. 2005.
      PDF format
    • Y. H. Kim and A. Ortega, "Quantizer Design for Source localization in Sensor Networks". IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP), Philadelphia, March 2005. PDF format
    • Y. H. Kim and A. Ortega, "Quantizer Design and Distributed Encoding Algorithm for Source Localization in Sensor Networks". International Conference on Information Processing in Sensor Networks (IPSN), Los Angeles, April 2005.PDF format
    • I. Chong and A. Ortega, "Hardware Testing For Error Tolerant Multimedia Compression based on Linear Transforms". In Proc. of IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems (DFT), Monterey, October 2005.PDF format
    • H. Chung and A. Ortega, "Analysis and testing for error tolerant motion estimation". In Proc. of IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems (DFT), Monterey, October 2005.PDF format
    • Ngai-Man Cheung, Huisheng Wang and Antonio Ortega, "Correlation Estimation for Distributed Source Coding under Information Exchange Constraints," IEEE International Conference on Image Processing (ICIP) , 2005. PDF format
    • Caimu Tang, Ngai-Man Cheung, Antonio Ortega and Cauligi S. Raghavendra, "Efficient Inter-band Prediction and Wavelet Based Compression for Hyperspectral Imagery: A Distributed Source Coding Approach," IEEE Data Compression Conference (DCC) , 2005. PDF format
    • Huisheng Wang and Antonio Ortega, "Rate-Distortion Based Scheduling of Video with Multiple Decoding Paths", Image and Video Communications and Processing 2005 Conf., EI'2005 , Jan. 2005. PDF format
    • Ivy H. Tseng and Antonio Ortega, "Motion Estimation at the Decoder Using Maximum Likelihood Techniques for Distributed Video Coding", Proc. Asilomar Conference on Signals and Systems, Pacific Grove, CA, Nov. 2005. PDF format


    2006

    • I. Chong, H. Y. Cheong, and A. Ortega, "New Quality Metric for Multimedia Compression Using Faulty Hardware". In Proc. of International Workshop on Video Processing and Quality Metrics for Consumer Electronics, Arizona, January 2006.PDF format
    • PoLin Lai and Antonio Ortega, "Predictive Fast Motion/Disparity Search for Multiview Video Coding," in Proc. of Visual Communications and Image Processing (VCIP) 2006, San Jose, CA, Jan. 2006.
      PDF format
    • Y. H. Kim and A. Ortega, "Maximum A Posteriori (MAP)-Based Algorithm for Distributed Source Localization using Quantized Acoustic Sensor Readings". IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP), Toulouse, France, May 2006. PDF format
    • H. Y. Cheong, I. Chong and A. Ortega, "Computation Error Tolerance in Motion Estimation algorithms". In Proc. of International Conference on Image Processing (ICIP06), Atlanta, October 2006. PDF format
    • N.-M. Cheung and Antonio Ortega, "A model-based approach to correlation estimation in wavelet-based distributed source coding with application to hyperspectral imagery," in Proc. IEEE Int. Conf. Image Processing (ICIP) 2006. PDF format
    • N.-M. Cheung, Huisheng Wang, Antonio Ortega, "Video compression with flexible playback order based on distributed source coding," in Proc. Visual Communications and Image Processing (VCIP) 2006. PDF format
    • N.-M. Cheung and Antonio Ortega, "An efficient and highly parallel hyperspectral imagery compression scheme based on distributed source coding," in Proc. Asilomar Conf. on Signals, Systems, and Computers 2006. PDF format

    2007

    • I. Chong and A. Ortega, "Dynamic Voltage Scaling Algorithm For Power Constrained Motion Estimation". In Proc. of International Conference on Acoustics, Speech, and Signal Processing (ICASSP07), Hawaii, April 2007. PDF format
    • I. Chong and A. Ortega, "Power Efficient Motion Estimation Using Multiple Imprecise Metric Computation". In International Conference on Multimedia & EXPO (ICME07), Beijing, July 2007.
    • I. H. Tseng and A. Ortega, "Rate-distortion Analysis and Bit Allocation Strategy for Motion Estimation at the Decoder Using Maximum Likelihood Technique in Distributed Video Coding". In Proc. of IEEE International Conference on Image Processing (ICIP07), San Antonio, TX, Sep., 2007. PDF format
    • N.-M. Cheung and A. Ortega, "Flexible video decoding: A distributed source coding approach," in Proc. International Workshop on Multimedia Signal Processing (MMSP) 2007. PDF format
    • A. Ortega, "Video Coding: Predictions are Hard to Make, Especially About the Future", (invited paper) in Proceedings of 12th Image Media Processing Symposium , Shuzenji, Japan, Nov.~2007. PDF format
    • H. Y. Cheong and A. Ortega, "Distance Quantization Method for Fast Nearest Neighbor Search Computations with applications to Motion Estimation", Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, November, 2007. PDF format
    • H. Y. Cheong and A. Ortega, "Motion Estimation Performance Models with application to Hardware Error Tolerance", In Proceedings of Visual Communications and Image Processing (VCIP), 2007. PDF format

    2008

    • G. Shen and A. Ortega, "Optimized Distributed 2D Transforms for Irregularly Sampled Sensor Network Grids Using Wavelet Lifting". IEEE International Conference on Acoustic, Speech and Signal Processing (ICASSP'08), Las Vegas, NV, April 2008. PDF format
    • G. Shen and A. Ortega, "Joint Routing and 2D Transform Optimization for Irregular Sensor Network Grids Using Wavelet Lifting". International Conference on Information Processing in Sensor Networks (IPSN'08), St. Louis, MO, April 2008. PDF format
    • G. Shen and A. Ortega, "Compact Image Representation Using Wavelet Lifting Along Arbitrary Trees". In Proc. of IEEE International Conference on Image Processing (ICIP'08), San Diego, CA, Oct., 2008. PDF format