Professor, FIEEE, FCAE, FRSC

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 known 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, information security, to deep learning, 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 & Modulation
  • Information Theory
  • Digital Communications
  • Description Complexity Theory
  • Communication & Information Systems
  • Source & Channel Coding
  • Image & Video Coding
  • Multimedia Communications
  • Data Analytics
  • Information Security
  • Deep Learning


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


  • ECE 415 - Multimedia Communications
    • Taught in 2017
  • ECE 611 - Digital Communications
    • Taught in 2018, 2019, 2020
* Only courses taught in the past 5 years are displayed.

Selected/Recent Publications

  • He, J, Yang, En-Hui, Yang, F, and Yang, K, Adaptive Quantization Parameter Selection Algorithm for H.265/HEVC Based on Inter-Frame Dependency, IEEE Trans. Circuits Syst. Video Technology, 28(12), 2018, 3424 - 3436
  • 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
  • Yang, En-Hui and Meng, Jin, New Nonasymptotic Channel Coding Theorems for Structured Codes, IEEE Transactions on Information Theory, 61(9), 2015, 4534 - 4553
  • Yang, En-Hui and Yu, Xiang, Rate distortion optimization for H. 264 interframe coding: a general framework and algorithms, IEEE Transactions on Image Processing, 16(7), 2007, 1774 - 1784
  • Kieffer, John C and Yang, En-Hui, Grammar-based codes: a new class of universal lossless source codes, IEEE Transactions on Information Theory, 46(3), 2000, 737 - 754

Graduate Studies