Contact InformationEn-Hui Yang

Phone: 519-888-4567 x32873
Location: EIT 4157


Biography Summary

En-Hui Yang is an Electrical and Computer Engineering Professor and founding director of the Leitch-University of Waterloo Multimedia Communications lab. He is also the co-founder of SlipStream Data Inc. (now a subsidiary of BlackBerry Inc. formerly known as Research In Motion), and a past associate editor for IEEE Transactions on Information Theory. Professor Yang holds a Canada Research Chair (Tier 1) in Information Theory and Multimedia Data Compression.

Professor Yang is the co-developer of the Yang-Kieffer algorithm, a numerical set of rules that use grammar-based coding to achieve lossless compression of text and image files, and also the co-inventor of soft decision quantization (also knowns as rate distortion optimization quantization or trellis quantization), an efficient coding technology widely used in image/video application related products (such as smart phones, web browsers, etc.) for better compression. With research interests ranging from multimedia compression, information theory, digital communications, image and video coding, image understanding and management, big data analytics, to information security, he aims to develop technologies that will enhance the storage capacity of computers, make the transmission of data faster and more reliable, secure data anytime and anywhere, and/or make big data understandable.

Research Interests

  • Multimedia data compression
  • Coding and modulation
  • Information theory
  • Digital communications
  • Description complexity theory
  • Communication & Information Systems
  • Source and Channel Coding
  • Information Theory
  • Digital Communications
  • Image and Video Coding
  • Multimedia Communications
  • Image processing
  • Data analytics
  • Big data/analytics
  • Cloud technology
  • Information systems
  • Security
  • Wireless communications/networking
  • Connectivity and Internet of Things
  • Information security
  • IoT
  • Communications and Access
  • Networking and Data
  • Dependability and security


  • 1996, Doctorate, Electrical Engineering, University of Southern California
  • 1991, Doctorate, Applied Mathematics, Nankai University
  • 1991, Master's, Applied Mathematics, Nankai University
  • 1986, Bachelor's, Applied Mathematics, HuaQiao University


  • ECE 415 - Multimedia Communications
    • Taught in 2014, 2015, 2016, 2017
  • ECE 611 - Digital Communications
    • Taught in 2014, 2015, 2016, 2018
  • ECE 617 - Data Compression with Applications to Speech and Image Coding
    • Taught in 2015
* Only courses taught in the past 5 years are displayed.

Selected/Recent Publications

  • Fang, Yong and Stankovic, Vladimir and Cheng, Samuel and Yang, En-hui, Hamming Distance Spectrum of DAC Codes for Equiprobable Binary Sources, IEEE Transactions on Communications, 64(3), 2016, 1232 - 1245
  • Hu, Nan and Yang, En-Hui, Fast mode selection for HEVC intra-frame coding with entropy coding refinement based on a transparent composite model, IEEE Transactions on Circuits and Systems for Video Technology, 25(9), 2015, 1521 - 1532
  • Sun, Chang and Yang, En-Hui, An efficient DCT-based image compression system based on Laplacian transparent composite model, IEEE Transactions on Image Processing, 24(3), 2015, 886 - 900
  • Yin, Hai Bing and Yang, En-Hui and Yu, Xiang and Xia, Zhelei, Fast Soft Decision Quantization With Adaptive Preselection and Dynamic Trellis Graph, IEEE Transactions on Circuits and Systems for Video Technology, 25(8), 2015, 1362 - 1375
  • Yang, En-Hui and Meng, Jin, New Nonasymptotic Channel Coding Theorems for Structured Codes, IEEE Transactions on Information Theory, 61(9), 2015, 4534 - 4553