The video compression techniques developed in the past deployed DCT
(Discrete Cosine Transform) for removing spatial redundancies and
MEC (Motion Estimation and Compensation) for removing temporal
redundancies in the video stream. These techniques suffer from
blocking artifacts and produces low quality compressed video when
the bandwidth availability is low in case of simultaneous
transmissions on the link. Many DWT based video compression
techniques have been proposed, but, unfortunately no standard has
been developed to deploy these techniques because either most of
the techniques have not been implemented practically or desired
results have not been obtained successfully. This study presents a
new compression technique deploying DWT for removing spatial
redundancies and MEC for removing temporal redundancies. 10%
improvement in compression ratio is obtained using the proposed
approach, when applied to already compressed format such as AVI,
WMV etc. This work is a first step towards the development of
scalable video codec using DWT and MEC, which can be deployed as a
future video compression standard.
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