Woo-Shik Kim

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Woo-Shik Kim

Ph.D.

Senior Staff Engineer

Qualcomm Technologies, Inc.

E-mail: wooshikk@qti.qualcomm.com

Advisor: Antonio Ortega

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Research Interests

  • Multimedia processing
  • Image/video compression
  • 3-D video processing


Education

  • Aug. 2006-Aug. 2011: University of Southern California, Los Angeles, CA, USA
    • Ph.D., Department of Electrical Engineering
  • Mar. 1999-Feb. 2001: Sogang University, Seoul, Korea
    • Master of Science in Electrical Engineering, May 2007, Department of Electrical Engineering
  • Mar. 1992-Feb. 1999: Sogang University, Seoul, Korea
    • Bachelor of Science in Electrical Engineering, Jun. 2005, Department of Electrical Engineering


Professional Experience

  • Texas Instruments: Jul. 2011-Feb. 2013
    • Member of Technical Staff
    • Research in video compression and processing

Honors and Awards

  • Winner of the Top 10% Paper Award at the IEEE MMSP Conference 2011
  • Winner of the Best Paper Award at the Samsung Technical Conference 2004


Summary of Main Research

  • 3-D video processing
    • Distortion analysis in depth image based rendering (DIBR) system
    • Depth map compression
    • Multiview video compression
  • Distributed video coding
  • High-quality video coding
    • RGB video coding using residual color transform (RCT) and inter-plane prediction (IPP)
    • 4:4:4 10-bit video coding techniques, such as intra prediction, motion interpolation/prediction, quantization, entropy coding (CABAC), RD optimized mode selection, etc
  • Visually lossless coding
    • Real-time visually lossless codec for liquid crystal display (LCD) dynamic charge capacitance (DCC) device
    • Real-time visually lossless codec for display driver IC (DDI) in mobile phone
  • MPEG-4 AVC/H.264 international standardization
    • Participating in the international standardization of H.264/MPEG-4 AVC Baseline/Main/Hi Profiles
    • Participating in the H.264/MPEG-4 AVC reference S/W implementation
  • Joint source channel coding
    • Rectangular slice structure for subjective quality enhancements in error-prone environment, using region of interest scheme (Adopted in MPEG-4 AVC/H.264 Baseline Profile as slice group map type 2)
    • RD-optimized mode selection considering error-prone environment.
  • Codec speed optimization
    • Speed optimization of MPEG-4 Core Profile decoder for DSP
    • Speed optimization of MPEG-4 Simple Profile encoder for ARM9


Skills / Tools

  • Proficient in C/C++, MatLab
  • Working knowledge of Windows and UNIX systems


Publications

  • Recent Papers
    • W.-S. Kim, S. K. Narang, and A. Ortega, "Graph based transforms for depth video coding," Proc. of IEEE Intl. Conf. Acoustics, Speech, and Signal Proc. (ICASSP 2012), Kyoto, Japan, Mar. 2012.
    • G. Cheung, W.-S. Kim, A. Ortega, J. Ishida, and A. Kubota, "Depth map coding using graph based transform and transform domain sparsification," Proc. of IEEE Intl. Workshop on Multimedia Signal Proc., Hangzhou, China, Oct. 2011. (Top 10% Paper Award)
    • W.-S. Kim, A. Ortega, J. Lee, and H. Wey, "3-D video quality improvement using depth transition data," Proc. of IEEE Intl. Workshop on Hot Topics in 3D (Hot 3D 2011), Barcelona, Spain, Jul. 2011. PDF format
    • W.-S. Kim, A. Ortega, J. Lee, and H. Wey, "3-D video coding using depth transition data," in Proc. of 28th Picture Coding Symposium (PCS ‘10), Nagoya, Japan, Dec. 2010. PDF format
    • G. Shen, W.-S. Kim, S. K. Narang, A. Ortega, J. Lee, and H. Wey, "Edge-adaptive transforms for efficient depth-map coding," in Proc. of 28th Picture Coding Symposium (PCS ‘10), Nagoya, Japan, Dec. 2010. PDF format
    • G. Shen, W.-S. Kim, A. Ortega, J. Lee, and H. Wey, "Edge-aware intra prediction for depth-map coding". in Proc. of IEEE Intl. Conf. Image Proc. (ICIP ‘10), Hong Kong, Sep. 2010. PDF format
    • W.-S. Kim, A. Ortega, P. Lai, D. Tian, and C. Gomila, “Depth map coding with distortion estimation of rendered view,” in Proc. of SPIE Visual Information Processing and Communication (VIPC ‘10), San Jose, CA, USA, Jan. 2010. PDF format
    • W.-S. Kim, A. Ortega, P. Lai, D. Tian, and C. Gomila, “Depth map distortion analysis for view rendering and depth coding,” in Proc. of IEEE Int. Conf. Image Proc. (ICIP ‘09), Cairo, Egypt, Nov. 2009. PDF format


  • Thesis
    • Woo-Shik Kim, “3-D video coding system with enhanced rendered view quality,” Ph. D. dissertation, Univ. Southern California, Aug. 2011.
    • Woo-Shik Kim, “Rate-distortion optimized mode selection for error resilience in MPEG-4 video coding,” Masters Thesis, Sogang Univ., 2001.


  • International Journal Papers
    • W.-S. Kim, D. Cho, D. Birinov, H. M. Kim, S.-H. Lee, and Y.-S. Seo, “RGB video coding using residual color transform,” Samsung Journal of Innovative Technology, vol. 1, no. 1, Aug. 2005. PDF format
    • W.-S. Kim and R.-H. Park, “Rate-distortion optimized intra update for error resilience in MPEG-4 video coding,” Intl. J. Image Systems and Tech., vol. 13, no. 6, pp. 341-347, 2003. PDF format
    • W.-S. Kim, I.-S. Park, S.-H. Park, B.-U. Lee, and R.-H. Park, “Conformance test of simple profile MPEG-4 texture decoding,” Journal of Electronic Imaging, vol. 11, no. 3, pp. 375-380, Jul. 2002. PDF format


  • International Conference Papers
    • S. Liu, W.-S. Kim, and A. Vetro, “Bit-depth scalable coding for high dynamic range video,” VCIP '08, San Jose, California, USA, Jan. 2008.
    • W.-S. Kim, D. Cho, and H. M. Kim, “Residue sampling for image and video compression,” VCIP '05, Beijing, China, Aug. 2005. PDF format
    • W.-S. Kim, D. Cho, H. M. Kim, and S. Sun, “New High Fidelity RGB Video Coding,” Workshop on Future Directions in Video Compression, Busan, Korea, Apr. 2005.
    • W.-S. Kim, D. Cho, and H. M. Kim, “Inter-plane prediction for RGB coding,” ICIP '04, Singapore, Oct. 2004. PDF format
    • H. M. Kim, W.-S. Kim, and D. Cho, “A new color transform for RGB coding,” ICIP '04, Singapore, Oct. 2004. PDF format
    • W.-S. Kim, I.-S. Park, S.-H. Park, B.-U. Lee, and R.-H. Park, “Static test of MPEG-4 visual decoders,” IAPR Workshop on Machine Vision Applications 2000, Tokyo, Japan, Nov. 2000.
    • W.-S. Kim and R.-H. Park, “Fast ICP algorithm using a one-dimensional search,” IAPR Workshop on Machine Vision Applications 2000, Tokyo, Japan, Nov. 2000.
    • K.-S. Yoon, B.-U. Lee, R.-H. Park, and W.-S. Kim, “Registration of range images considering depth measurement error,” IAPR Workshop on Machine Vision Applications 2000, Tokyo, Japan, Nov. 2000.


  • Book Chapters
    • G. Cheung et al, Depth map compression for depth-image-based rendering, 3DTV System with Depth-Image-Based Rendering: Architectures, Techniques and Challenges, Springer, to be published.
    • D.-K. Kwon et al, Video compression, The Mobile Communications Handbook, third edition, CRC Press, to be published.

Contributions to International Standardization

  • W.-S. Kim, D.-K. Kwon, "CE8 Subset c: Necessity of Sign Bits for SAO Offsets," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-H0434, Feb. 2012.
  • W.-S. Kim, D.-K. Kwon, "CE8 Subset d.1: Reduced Number of Band Offsets in SAO," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-H0436, Feb. 2012.
  • W.-S. Kim, D.-K. Kwon, "Non-CE8: New Chroma Band Offset (BO) Design in SAO," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-H0438, Feb. 2012.
  • W.-S. Kim, D.-K. Kwon, "Non-CE8: Method of visual coding artifact removal for SAO," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-G680, Nov. 2011.
  • W.-S. Kim, D.-K. Kwon, "Non-CE8: Reduced number of band offsets in SAO," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-G682, Nov. 2011.
  • W.-S. Kim, O. G. Sezer, M. Budagavi, "Subjective Tests on ALF and SAO Using HM-4.0," ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11, Document JCTVC-G684, Nov. 2011.
  • W.-S. Kim, P. Pahalawatta, Z. Li, A. M. Tourapis, “New video quality metrics in the H.264 reference software,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-AB031, Jul. 2008.
  • S. Liu, A. Vetro, W.-S. Kim “Inter-layer prediction for bit-depth scalability,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-X075, Jul. 2007.
  • W.-S. Kim, D. Cho, D. Birinov, H. M. Kim, “Advanced residual color transform,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-Q059, Oct. 2005.
  • W.-S. Kim, D. Cho, D. Birinov, H. M. Kim, “Verification and analysis of experiments in JVT-P017,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-Q058, Oct. 2005.
  • W.-S. Kim, D. Birinov, D. Cho, H. M. Kim, “Study on advanced 4:4:4 coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-P049, Jul. 2005.
  • W.-S. Kim, D. Birinov, D. Cho, H. M. Kim, “Further experimental results on 4:4:4 coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-P048, Jul. 2005.
  • W.-S. Kim, D. Birinov, D. Cho, H. M. Kim, “Enhancements to RGB coding in H.264/MPEG-4 AVC FRExt,” ITU-T SG16 Q.6, Document VCEG-Z16, Apr. 2005.
  • W.-S. Kim, D. Birinov, H. M. Kim, “Additional experimental results on residue sampling (JVT-K018),” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-L028, Jul. 2004.
  • W.-S. Kim, D. Birinov, H. M. Kim, “Residue color transform,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-L025, Jul. 2004.
  • W.-S. Kim, J.-H. Park, D. Cho, H. M. Kim, “Alpha channel coding using the JVT coding tools,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-K019, Mar. 2004.
  • W.-S. Kim, D. Birinov, H. M. Kim, “Adaptive residue transform and sampling,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-K018, Mar. 2004.
  • W.-S. Kim, H. M. Kim, “Residue transform,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-J038, Dec. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Reference software supporting n-bit and 4:4:4 chroma format,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-J025, Dec. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Proposal for the unsolved issues in Professional Extensions II,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-J018, Dec. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Inter-plane prediction for RGB coding II,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-J017, Dec. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Proposal for alpha channel coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-J016, Dec. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Inter-plane prediction for RGB coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-I023, Sep. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Proposal for the unsolved issues in Professional Extensions,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-I012, Jul. 2003.
  • W.-S. Kim, D. Cho, H. M. Kim, “Color format extension,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-H018, May 2003.
  • W.-S. Kim, K.-W. Kim, “Parallel processing issue in main profile,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-F059,” Dec. 2002.
  • W.-S. Kim, D. Cho, K.-W. Kim, “Intra prediction enhancements,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-E051, Oct. 2002.
  • W.-S. Kim, D. Cho, K.-W. Kim, “Complexity reduction of plane mode in chroma intra prediction,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-E050, Oct. 2002.
  • W.-S. Kim, D. Cho, S.-H. Lee, “Clarification of FMO mode 3,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-E049, Oct. 2002.
  • W.-S. Kim, Ye-Kui Wang, Miska M. Hannuksela, “Sub-picture coding with the reduced boundary effect,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-C096, May 2002.
  • W.-S. Kim, D. Cho, “Selection of quantization parameter for sub-picture coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-B087, Jan. 2002.
  • W.-S. Kim, D. Cho, “Results on core experiment of sub-picture coding,” ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6, Document JVT-B086, Jan. 2002.


US Patents

  • 31 Registered / 30+ Pending (List available upon request)


Related Links

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