Welcome to the homepage of the Multimedia Communications Laboratory at the ECE department of the University of Waterloo!
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What's new:


  • Our mission: Make a real difference in the theory and practice of multimedia compression/communications, where publication and patent filing are only a small part of the whole process.
  • Our activities: Range from lossless compression to lossy compression, from text compression and image/audio coding to video coding, from single resolution coding to multi-resolution (scalable) coding, from 3O (one source, one encoder, and one decoder) coding to distributed coding and interactive encoding/decoding, from watermarking to joint watermarking and compression, from joint source-channel coding to wireless video multicast, and from theory to algorithms and to practice with real impact.
  • Our approach: Emphasize on excellence in both theory and practice---all our algorithm inventions are based on our original theoretic breakthroughs.
  • Our achievement -- Partial list:
    • Transparent composite model for DCT coefficients and the corresponding application in video and image coding.
    • Jar decoding
    • Grammar-based coding---Regarded as one of the most important contributions to universal lossless source coding of individual sequences since 1970s
    • Yang-Kieffer (YK) compression algorithms---the state of the art of universal on-line lossless compression for email and web acceleration
    • Computation approach to lossy compression pioneered along with Ziv and others, which is in parallel with Shannon's classic probabilistic approach and arguably has more impact on compression practice.
    • State of the art of GIF/PNG optimizer
    • State of the art of JPEG optimizer
    • State of the art of H.264 video encoding
    • Soft decision quantization (SDQ) and its algorithms for image and video coding (used in open sources and standards (existing, de facto, and ongoing). For example, VP8 and WebP, which are supported in in Android devices since Android 4.3, use a trellis-based search process to quantize a block of DCT coefficients. VP9, as the successor to VP8, which YouTube uses right now, uses a similar quantization process to that in VP8.
    • Causal video coding theory
    • Around 200 patents/patent applications worldwide
    • Impact on the daily life of hundreds of millions people worldwide either through commercialized products, or codec open sources, or codec standards.


Copyright 2004-2015 Multicom Research Lab.

Currently Maintained by Nan Hu

Last updated on Feb. 2015

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