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In-band scalable video coding with integrated wavelet-based display driving This publication appears in: Journal of the Society for Information Display Authors: S. Lam, F. Verdicchio, H. De Smet and A. Munteanu Volume: 15 Issue: 4 Pages: 237-250 Publication Date: Apr. 2007
Abstract: The increasing demand for multimedia over networks and the heterogeneous nature of today's networks and
playback devices impose the stringent need for scalable video coding. In this context, in-band wavelet-based
video coding architectures offer full scalability in terms of quality, resolution and frame-rate and provide
compression performance competitive against that of state-of-the-art non-scalable technology. Despite of these
advances, video streaming over wireless networks to handheld terminals is lagging in popularity due to the high
power consumption of the existing portable devices. As a possible approach to alleviate this problem, we
investigate the integration of wavelet-based passive matrix display driving into the inverse discrete wavelet
transform (IDWT) block of the in-band video decoding architecture. In a nutshell, the IDWT needs not to be
performed anymore by the decoder, being synthesized instead by the display itself. This integration reduces the
number of calculations needed to generate the driving waveforms for passive matrix displays and inherently leads
to reduced power consumption on portable terminals. Moreover, the wavelet-transform and the considered video
codec architecture are both resolution-scalable. Hence, the end user can easily display the decoded video frames at
the desired resolution. It is shown that the resolution-scalability feature of the video codec, enabling resolution scalable
display driving, is another means to control the power-consumption on the portable device.
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