Publications


Journal Papers

  1. C. L. Salazar and T. D. Tran, "A complexity scalable universal DCT domain image resizing algorithm," IEEE Transactions on Circuits and Systems for Video Technology, vol. 17, pp. 495-499, Apr. 2007.
  2. L. Gan, C. Tu, J. Liang, T. D. Tran and K.-K. Ma, "Under-sampled boundary pre-/post-filters for low bitrate block DCT coders," IEEE Trans. Image Processing, vol. 16, pp. 428-441, Feb. 2007.
  3. J. Liang, C. Tu, L. Gan, T. D. Tran and K.-K. Ma, "Wiener filter-based error resilient time domain lapped transform," IEEE Trans. Image Processing, vol. 16, pp. 491-502, Feb. 2007.
  4. C. Kwan, B. Li, R. Xu, X. Li, T. D. Tran, and T. Nguyen, "A complete image compression scheme based on overlapped block transform with post-processing," EURASIP Journal on Applied Signal Processing, Article ID 10968, pp. 1-15, vol. 2006.
  5. C. Tu, T. D. Tran, and J. Liang, "Error resilient pre-/post-filtering for DCT-based block coding systems," IEEE Trans. on Image Processing, vol. 15, pp. 30-39, Jan. 2006. PDF
  6. J. Liang, C. Tu, and T. D. Tran, "Optimal block boundary pre/post-filtering for wavelet-based image and video compression," IEEE Trans. on Image Processing, vol. 14, pp. 2151-2158, Dec. 2005. PDF
  7. P. P. Dang, P. M. Chau, T. Q. Nguyen, and T. D. Tran, "BinDCT and its efficient VLSI architectures for real-time embedded applications," Journal of Imaging Science and Technology, vol. 49, no. 2, pp. 124-137, Mar. 2005. PDF
  8. S. Oraintara, T. D. Tran, and T. Q. Nguyen, "Regular biorthogonal linear-phase filter banks: theory, structure and application in image coding," IEEE Trans. on Signal Processing, vol. 51, pp. 3220-3235, Dec. 2003. PDF
  9. W. Dai and T. D. Tran, "Regularity-constrained pre- and post-filtering for block DCT based systems," IEEE Trans. on Signal Processing, vol. 51, pp. 2568-2581, Oct. 2003. PDF
  10. T. D. Tran, J. Liang, and C. Tu, "Lapped transform via time-domain pre- and post-filtering," IEEE Trans. on Signal Processing, vol. 51, pp. 1557-1571, Jun. 2003. PDF
    (Errata: In the first line of Table V, the order of the lifting steps should be P2 U2 P1 U1 P0 U0 instead of P0 U0 P1 U1 P2 U2. That is, smaller lifting coefficients are at the lower part of Matrix V in Fig. 17.)
  11. J. Liang and T. D. Tran, "An alternative DCT-based general structure for linear phase paraunitary filter banks," IEEE Trans. on Signal Processing, vol. 51, pp. 1572-1580, Jun. 2003. PDF
  12. C. Tu, J. Liang, and T. D. Tran, "Adaptive runlength coding," IEEE Signal Processing Letters, vol. 10, pp. 61-64, Mar. 2003. PDF
  13. Y. J. Chen, S. Oraintara, T. D. Tran, K. Amaratunga, and T. Q. Nguyen, "Multiplierless approximation of transforms with adder constraint," IEEE Signal Processing Letters, vol. 9, pp. 344-347, Nov. 2002. PDF
  14. C. Tu and T. D. Tran, "Context based entropy coding of block transform coefficients for image compression," IEEE Trans. on Image Processing, vol. 11, pp. 1271-1283, Nov. 2002. PDF
  15. T. D. Tran, "M-channel linear phase perfect reconstruction filter bank with rational coefficients," IEEE Trans. on Circuits and Systems I: Fundamental Theory and Applications, vol. 49, pp. 914-927, Jul. 2002. PDF
  16. L. Gan, K.-K. Ma, T. Q. Nguyen, T. D. Tran, and R. L. de Queiroz, "On the completeness of the lattice factorization for linear phase perfect reconstruction filter banks," IEEE Signal Processing Letters, vol. 9, pp. 133-136, Apr. 2002. PDF
  17. M. Ikehara, T. D. Tran, and T. Q. Nguyen, "A family of lapped regular transforms with integer coefficients," IEEE Trans. on Signal Processing, vol. 50, pp. 834-841, Apr. 2002. PDF
  18. J. Liang and T. D. Tran, "Fast multiplierless approximations of the DCT with the lifting scheme," IEEE Trans. on Signal Processing, vol. 49, pp. 3032-3044, Dec. 2001. PDF
  19. S. Oraintara, T. D. Tran, P. Heller, and T. Q. Nguyen, "Lattice struture for regular paraunitary linear phase filter banks and M-band orthogonal symmetric wavelets," IEEE Trans. on Signal Processing, vol. 49, pp. 2659 -2672, Nov. 2001. PDF
  20. R. L. de Queiroz, Z. Fan, and T. D. Tran, "Optimizing block-thresholding segmentation for multi-layer compression of compound images," IEEE Trans. on Image Processing, vol. 9, pp. 1461-1471, Sep. 2000. PDF
  21. T. D. Tran, "The LiftLT: fast lapped transforms via lifting steps," IEEE Signal Processing Letters, vol. 7, pp. 145-149, Jun. 2000. PDF
  22. T. D. Tran, "The BinDCT: fast multiplierless approximation of the DCT," IEEE Signal Processing Letters, vol. 7, pp. 141-145, Jun. 2000. PDF
  23. T. D. Tran, R. L. de Queiroz, and T. Q. Nguyen, "Linear phase perfect reconstruction filter bank: lattice structure, design, and application in image coding," IEEE Trans. on Signal Processing, vol. 48, pp. 133-147, Jan. 2000. PDF
  24. T. D. Tran and T. Q. Nguyen, "A progressive transmission image coder using linear phase uniform filter banks as block transforms," IEEE Trans. on Image Processing, vol. 8, pp. 1493-1507, Nov. 1999. PDF
  25. T. D. Tran, M. Ikehara, and T. Q. Nguyen, "Linear phase paraunitary filter bank with filters of different lengths and its application in image compression," IEEE Trans. on Signal Processing, vol. 47, pp. 2730-2744, Oct. 1999. PDF
  26. T. D. Tran and T. Q. Nguyen, "On M-channel linear phase FIR filter banks and application in image compression," IEEE Trans. on Signal Processing, vol. 45, pp. 2175-2187, Sept. 1997. PDF


Book Chapters

  1. R. L. de Queiroz and T. D. Tran, "Lapped transforms for image compression," The Handbook on Transforms and Data Compression, edited by K. R. Rao and P. Yip, CRC Press, pp. 197-265, Oct. 2000. Postscript | PDF
  2. T. D. Tran and T. Q. Nguyen, "Block transforms in progressive image coding," in Wavelet Image and Video Compression, edited by P. N. Topiwala, Kluwer Academic, Norwell, MA, pp. 303-315, June 1998. Postscript | PDF
  3. T. D. Tran and T. Q. Nguyen, "Block transforms in progressive image coding," in Wavelets and Filter Banks, G. Strang and T. Q. Nguyen, Wellesley-Cambridge Press, Wellesley, MA, Revised Edition, pp. 501-513, May 1998.


Conference Papers

  1. G. Sun, U. Samarawickrama, J. Liang, C. Tu, and T. D. Tran, ``Multiple description coding with prediction compensation,'' Proc. IEEE Int. Conf. on Image Processing, San Antonio, Sep. 2007.
  2. Y. Chi, T. D. Tran, and R. Etienne-Cummings, "Optical flow approximation of sub-pixel accurate block matching for video coding," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Honolulu, Apr. 2007.
  3. P. Vouras and T. D. Tran, "Paraunitary filter bank design using derivative constraints," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Honolulu, Apr. 2007.
  4. L. Liu and T. D. Tran, "An 8x8 IEEE-compliant lifting-based multiplierless IDCT structure and algorithm," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Honolulu, Apr. 2007.
  5. L. Liu, T. D. Tran, and P. Topiwala, "Fast 16-bit fixed-point 8x8 IDCT approximations," Proc. IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Nov. 2006.
  6. P. Vouras and T. D. Tran, "Wideband adaptive beamforming using linear phase filter banks," Proc. IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Nov. 2006.
  7. I. El-Shehaby and T. D. Tran, "On local computation of wavelet coefficients in the dual-tree complex wavelet transform," Proc. IEEE Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Nov. 2006.
  8. C. Salazar and T. D. Tran, "A more efficient and video friendly spatial resizing algorithm," Proc. IEEE Int. Conf. on Image Processing, Atlanta, Oct. 2006.
  9. A. Abbas and T. D. Tran, "Multiplierless design of biorthogonal dual-tree complex wavelet transform using lifting scheme," Proc. IEEE Int. Conf. on Image Processing, Atlanta, Oct. 2006.
  10. L. Liu, W. Dai, and T. D. Tran, "JPEG-compliant image coding with adaptive pre-/post-filtering," Proc. IEEE Int. Conf. on Circuits and Systems, Kos, Greece, May 2006.
  11. J. Liang, X. Li, G. Sun, and T. D. Tran, "Two-dimensional Wiener filters for error resilient time domain lapped transform," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, Toulouse, France, May 2006.
  12. J. P. Stralka and T. D. Tran, "Modulated lapped transform generalized sidelobe canceller," Proc. IEEE Int. Workshop on Computational Advances in Multi-Sensor Adaptive Processing, Puerto Vallarta, Mexico, Dec. 2005.
  13. J. Liang, C. Tu, T. D. Tran, and L .Gan, "Error resilient DCT image coding with pre/post-filtering and Wiener filtering," SPIE Conference on Visual Communications and Image Processing 2005, vol. 5960, pp. 1215-1225, Beijing, Jul. 2005.
  14. C. L. Salazar and T. D. Tran, "Flexible resizing algorithms for video transcoding," Proc. IEEE Int. Symp. on Circuits and Systems, pp. 916-919, Kobe, Japan, May 2005.
  15. P. Vouras and T. D. Tran, "Principal component filter bank for band partitioned sidelobe cancellation," IEEE International Radar Conference, pp. 691-696, May 2005.
  16. W. Dai, L. Liu, and T. D. Tran, "Adaptive block-based image coding with pre-/post-filtering," Proc. Data Compression Conference, pp. 73-82, Snowbird, Mar. 2005.
  17. A. Abbas and T. D. Tran, "Fast approximations of the orthogonal dual-tree wavelet bases," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, pp. 605-608, Philadelphia, Mar. 2005.
  18. J. Liang, C. Tu, T. D. Tran, and L .Gan, "Wiener filtering for generalized error resilient time domain lapped transform," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, pp. 181-184, Philadelphia, Mar. 2005.
  19. C. Tu, T. D. Tran, and J. Liang, "Over-sampled and under-sampled pre-/post-filters for block DCT coders," Proc. IEEE Int. Conf. on Image Processing, pp. 1277-1280, Singapore, Oct. 2004.
  20. J. Liang, C. Tu, and T. D. Tran, "Optimal block boundary pre-/post-filtering for wavelet-based image and video compression," Proc. IEEE Int. Conf. on Image Processing, pp. 303-306, Singapore, Oct. 2004.
  21. C. L. Salazar and T. D. Tran, "On resizing images in the DCT domain," Proc. IEEE Int. Conf. on Image Processing, pp. 2797-2800, Singapore, Oct. 2004.
  22. J. Liang, L. Gan, C. Tu, T. D. Tran, and K.-K. Ma, "On efficient implementation of oversampled linear phase perfect reconstruction filter banks", Proc. IEEE ICASSP 2003, Hong Kong, Apr. 2003.
  23. C. Tu, T. D. Tran, and J. Liang, "Error resilient pre-/post-filtering for DCT-based block coding systems", Proc. IEEE ICASSP 2003, Hong Kong, Apr. 2003.
  24. J. Liang and T. D. Tran, "A partial DFT-based modified OFDM system resistant to channel nulls," Proc. 36th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Nov. 2002. Invited Paper.
  25. C. Tu, J. Liang, and T. D. Tran, "Adaptive runlength coding," Proc. IEEE Int. Conf. on Image Processing, vol. 2, pp. 665-668, Rochester, Sep. 2002.
  26. C. Tu and T. D. Tran, "On context based entropy coding of block transform coefficients," Proc. IEEE Int. Conf. on Image Processing, vol. 2, pp. 669-672, Rochester, Sep. 2002.
  27. J. Liang and T. D. Tran, "Further results on DCT-based linear phase paraunitary filter banks," Proc. IEEE Int. Conf. on Image Processing, vol. 2, pp. 1169-1172, Rochester, Sep. 2002.
  28. X. Fan, G. Shen, S. Li, T. D. Tran, and Y. Q. Zhang, "Rate-distortion optimization of macroblock-based progressive fine granularity scalable MPEG-4 video codec," Proc. IEEE Int. Symp. on Circuits and Systems, vol. 4, pp. 540-543, Scottsdale, May 2002.
  29. W. Dai, T. D. Tran, S. Oraintara, and T. Q. Nguyen, "Integer- and rational-coefficient M-band wavelet," Proc. IEEE Int. Symp. on Circuits and Systems, vol. 3, pp. 425-428, Scottsdale, May 2002.
  30. S. Gangaputra and T. D. Tran, "Adaptive pre- and post-filtering for block based systems," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 4, pp. 3297-3300, Orlando, May 2002.
  31. J. Liang and T. D. Tran, "DCT-based general structure for linear phase paraunitary filter banks," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 2, pp. 1169-1172, Orlando, May 2002.
  32. Y. J. Chen, S. Oraintara, T. D. Tran, and T. Q. Nguyen, "Multiplierless approximation of transforms using lifting scheme and coordinate descent with adder constraint," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 3, pp. 3136-3139, Orlando, May 2002.
  33. W. Dai and T. D. Tran, "Regularity-constrained pre- and post-filtering for block-based coding and communication systems," Proc. 3rd IEEE Int. Conf. on Information, Communications, and Signal Processing (ICICS2001), Singapore, Oct. 2001. Invited Paper.
  34. J. Liang, C. Tu, and T. D. Tran, "Fast lapped transforms via time-domain pre- and post-processing," Proc. 3rd IEEE Int. Conf. on Information, Communications, and Signal Processing (ICICS2001), Singapore, Oct. 2001. Invited Paper.
  35. T. D. Tran and C. Tu, "Lapped transform based video coding," Proc. SPIE Applications of Digital Image Processing XXIV, pp. 319-333, San Diego, Aug. 2001.
  36. C. Tu and T. D. Tran, "Context based entropy coding of block transform coefficients for image compression," Proc. SPIE Applications of Digital Image Processing XXIV, pp. 377-389, San Diego, Aug. 2001.
  37. T. D. Tran, "Lapped transform via time-domain pre- and post-processing," 35th Annual Conference on Information Sciences and Systems, pp. 890-895, Baltimore, MD, Mar. 2001. Invited Paper.
  38. J. Liang and T. D. Tran, "Approximating the DCT with the lifting scheme: systematic design and applications," Proc. 34th IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 1, pp. 192-196, Pacific Grove, Oct. 2000.
  39. C. Tu, T. D. Tran, J. L. Prince, and P. N. Topiwala, "Fast block-based motion estimation via DC matching," Proc. 34th IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 2, pp. 1379-1383, Pacific Grove, Oct. 2000.
  40. S. Chakrabartty, M. Stanacevic, and T. D. Tran, "Adaptive image database using wavelets," Proc. 34th IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 2, pp. 1856-1860, Pacific Grove, Oct. 2000.
  41. R. L. de Queiroz, Z. Fan and T. D. Tran, "Optimizing block-thresholding segmentation for MRC compression," Proc. IEEE Intl. Conf. on Image Processing, ICIP, vol. 2, pp. 597-600, Vancouver, Canada, Sep. 2000.
  42. J. Liang and T. D. Tran, "Fast multiplierless approximation of the DCT with the lifting scheme," Proc. SPIE Applications of Digital Image Processing XXIII, pp. 384-395, San Diego, Aug. 2000.
  43. C. Tu, T. D. Tran, J. L. Prince, and P. N. Topiwala, "Projection-based block motion estimation for video coding," Proc. SPIE Applications of Digital Image Processing XXIII, pp. 374-384, San Diego, Aug. 2000.
  44. L. C. Duval, V. Bui-Tran, T. Q. Nguyen, and T. D. Tran, "GenLOT optimization techniques for seismic data compression," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 4, pp. 2111-2114, Istanbul, Turkey, Jun. 2000.
  45. L. C. Duval, V. Bui-Tran, T. Q. Nguyen, and T. D. Tran, "Seismic data compression using GenLOT: towards optimality?," Proc. Data Compression Conference, pp. 552, Snowbird, UT, Mar. 2000.
  46. J. Liang, P. Xu, and T. D. Tran, "A robust DCT-based low frequency watermarking scheme," 34th Annual Conference on Information Sciences and Systems, vol. I, pp. TA5 1-6, Princeton, NJ, Mar. 2000.
  47. B. Li and T. D. Tran, "A very low bit-rate video codec based on lapped transform and overlapped block motion compensation," 34th Annual Conference on Information Sciences and Systems, vol. I, pp. TA5 19-24, Princeton, NJ, Mar. 2000.
  48. V. Kasarabada, E. Simsek, and T. D. Tran, "A wavelet-based image retrieval algorithm via mutual information," Proc. IS&T/SPIE Symp. on Electronic Imaging, Storage and Retrieval for Media Databases, pp. 450-460, San Jose, CA, Jan. 2000.
  49. R. de Queiroz and T. D. Tran, "A fast lapped transform for image coding," Proc. IS&T/SPIE Symp. on Electronic Imaging, Image and Video Communications and Processing, pp. 2-10, San Jose, CA, Jan. 2000.
  50. T. D. Tran, "A fast multiplierless block transform for image and video compression," IEEE Int. Conf. on Image Processing, vol. 3, pp. 822-826, Kobe, Japan, Oct. 1999.
  51. T. D. Tran, "The LiftLT: fast lapped transforms via lifting steps," IEEE Int. Conf. on Image Processing, vol. 2, pp. 745-748, Kobe, Japan, Oct. 1999.
  52. P. N. Topiwala and T. D. Tran, "Local zerotree coding," IEEE Int. Conf. on Image Processing, vol. 2, pp. 279-282, Kobe, Japan, Oct. 1999.
  53. T. D. Tran, "M-channel linear phase perfect reconstruction filter bank with integer coefficients,", Proc. SPIE Wavelet Applications in Signal and Image Processing VII, pp. 358-371, Denver, Jul. 1999. Invited Paper.
  54. T. D. Tran, "Fast multiplierless approximation of the DCT," 33rd Annual Conference on Information Sciences and Systems, vol. II, pp. 933-938, Baltimore, MD, Mar. 1999.
  55. L. C. Duval, T. Q. Nguyen, and T. D. Tran, "On progressive seismic data compression using GenLOT," 33rd Annual Conference on Information Sciences and Systems, vol. II, pp. 956-959, Baltimore, MD, Mar. 1999.
  56. S. Oraintara, P. Heller, T. D. Tran, and T. Q. Nguyen, "Lattice structure for regular M-channel filter banks," (invited paper), 2nd Int. Workshop on Transforms and Filter Banks, Brandenburg, Germany, Mar. 1999.
  57. T. D. Tran and T. Q. Nguyen, "Lapped transforms of arbitrary block size," Proc. 32nd IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 2, pp. 1416-1420, Pacific Grove, CA, Nov. 1998.
  58. T. D. Tran, R. de Queiroz, and T. Q. Nguyen, "Variable-length generalized lapped biorthogonal transform," Proc. IEEE Int. Conf. on Image Processing, vol. 3, pp. 697-701, Chicago, Oct. 1998.
  59. M. Ikehara, T. D. Tran, and T. Q. Nguyen, "Generalized lapped biorthogonal transform with integer coefficients," Proc. IEEE Int. Conf. on Image Processing, vol. 3, pp. 886-890, Chicago, Oct. 1998.
  60. M. Helsingius, T. D. Tran, and T. Q. Nguyen, "A GenLOT-based progressive image coder for low resolution images," Proc. IEEE Int. Conf. on Image Processing, vol. 2, pp. 312-316, Chicago, Oct. 1998.
  61. S. Oraintara, T. D. Tran, and T. Q. Nguyen, "On the study of diamond-shape filter banks and an application in image compression," Proc. IEEE DSP Workshop, Bryce Canyon National Park, Utah, Aug. 1998.
  62. T. D. Tran and T. Q. Nguyen, "A lapped transform embedded image coder," Proc. IEEE Int. Symp. on Circuits and Systems, vol. 4, pp. 1-4, Monterey, May 1998.
  63. T. D. Tran, R. de Queiroz, and T. Q. Nguyen, "The generalized lapped biorthogonal transform," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 3, pp. 1441-1444, Seattle, May 1998.
  64. T. D. Tran, T. Q. Nguyen, and Y. H. Hu, "A perceptually-tuned block-transform-based progressive transmission image coder," Proc. 31st IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 2, pp. 1000-1004, Pacific Grove, Nov. 1997.
  65. T. D. Tran and T. Q. Nguyen, "A progressive transmission image coder using linear phase paraunitary filter banks," Proc. 31st IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 1, pp. 679-683, Pacific Grove, CA, Nov. 1997.
  66. M. Ikehara, T. D. Tran, and T. Q. Nguyen, "Linear phase paraunitary filter banks with unequal-length filters," Proc. IEEE Int. Conf. on Image Processing, vol. 2, pp. 223-226, Santa Barbara, Oct. 1997.
  67. T. D. Tran and T. Q. Nguyen, "Generalized lapped orthogonal transform with unequal-length basis functions," Proc. IEEE Int. Symp. on Circuits and Systems, vol. 2, pp. 1385-1388, Hong Kong, Jun. 1997.
  68. T. D. Tran and R. Safranek, "A locally adaptive perceptual masking threshold model for image coding," Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 4, pp. 1882-1885, Atlanta, May 1996.
  69. T. D. Tran and T. Q. Nguyen, "On arbitrary-length M-channel linear-phase FIR filter banks," Proc. 29th IEEE Asilomar Conference on Signals, Systems, and Computers, vol. 1, pp. 61-65, Pacific Grove, CA, Nov. 1995.


Volumes Edited

  1. J. L. Prince and T. D. Tran, Editors, Proceedings of the 33rd Annual Conference on Information Sciences and Systems, The Johns Hopkins University, Baltimore, MD, Mar. 1999.


Theses

  1. T. D. Tran, "Linear Phase Perfect Reconstruction Filter Bank: Theory, Structure, Design, and Application in Image Compression," Ph.D. Thesis, University of Wisconsin-Madison, WI, May 1998.
  2. T. D. Tran, "A locally adaptive perceptual masking threshold model for image coding," Master Thesis, MIT, Cambridge, MA, May 1993.


Patents

  1. T. D. Tran and P. N. Topiwala, Method for local zerotree image coding. U.S. Patent No. 6,771,829, Aug. 2004.
  2. T. D. Tran and P. N. Topiwala, Fast lapped image transforms using lifting steps, U.S. Patent No. 6,421,464, Jul. 2002.
  3. R. L. de Queiroz, Z. Fan, and Trac D. Tran, Method and apparatus for segmenting data to create mixed raster content planes, U.S. Patent No. 6,373,981, Apr. 2002.
  4. T. Q. Nguyen, T. D. Tran, Y. H. Hu, Image compression system using block transforms and tree-type coefficient truncation, U.S. Patent No. 6,101,279, Aug. 2000.