Very low bit-rate video compression using wavelets

Chi-Man Kwan; Baoxin Li; Roger Xu; Trac D. Tran; Truong Q. Nguyen

doi:10.1117/12.421197

26 March 2001 Very low bit-rate video compression using wavelets

Chi-Man Kwan, Baoxin Li, Roger Xu, Trac D. Tran, Truong Q. Nguyen

Proceedings Volume 4391, Wavelet Applications VIII; (2001) https://doi.org/10.1117/12.421197
Event: Aerospace/Defense Sensing, Simulation, and Controls, 2001, Orlando, FL, United States

Abstract

A hybrid algorithm is proposed for very low bit-rate video compression. The algorithm uses a new wavelet based coder for Intraframe compression and DCT for Interframe compression. The wavelet coder technique known as OBTWC (Overlapped Block Transform Wavelet Coder) consists of three steps. First, a set of overlapped block transforms is used to transform the image data into 8 X 8 blocks in the frequency domain. Second, a mapping is then performed to convert the transformed image into a multiresolution representation that resembles the zero- tree wavelet transform. Third, the multiresolution representation is then coded by a conventional dyadic wavelet coder, which basically truncates the high frequency contents in a very efficient manner. Our proposed method essentially combines the advantages of both block transform and wavelet coding techniques while eliminating their respective weaknesses. Simulation results show that the coder achieves more than 300:1 compression ratio at a frame rate of 10 per second.

Citation Download Citation

Chi-Man Kwan, Baoxin Li, Roger Xu, Trac D. Tran, and Truong Q. Nguyen "Very low bit-rate video compression using wavelets", Proc. SPIE 4391, Wavelet Applications VIII, (26 March 2001); https://doi.org/10.1117/12.421197

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