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MOBISYS
2008
ACM
16 years 5 months ago
Symphony: synchronous two-phase rate and power control in 802.11 wlans
Adaptive transmit power control in 802.11 Wireless LANs (WLANs) on a per-link basis helps increase network capacity and improves battery life of Wifi-enabled mobile devices. Howev...
Kishore Ramachandran, Ravi Kokku, Honghai Zhang, M...
ICASSP
2007
IEEE
15 years 11 months ago
Fast Mode Decision for H.264 Based on Rate-Distortion Cost Estimation
A fast mode decision algorithm for an H.264 encoder is proposed which reduces computation by using a statistical dependency of macroblock rate-distortion (RD) costs. The algorithm...
Yao-Chung Lin, Torsten Fink, Erwin B. Bellers
MOBISYS
2009
ACM
16 years 6 months ago
R2D2: regulating beam shape and rate as directionality meets diversity
We design, implement, and evaluate a vehicular communication system that improves uplink connectivity through multi-lobe beam pattern switching on a smart antenna. Directionality ...
Kishore Ramachandran, Ravi Kokku, Karthikeyan Sund...
IWDW
2005
Springer
15 years 11 months ago
On the Achievable Rate of Side Informed Embedding Techniques with Steganographic Constraints
The development of watermarking schemes in the literature is generally guided by a power constraint on the watermark to be embedded into the host. In a steganographic framework the...
Mark T. Hogan, Félix Balado, Neil J. Hurley...
IEEEMSP
2002
IEEE
100views Multimedia» more  IEEEMSP 2002»
15 years 10 months ago
R-D analysis of adaptive edge representations
— This paper presents a Rate-Distortion analysis for a simple horizon edge image model. A quadtree with anisotropy and rotation is performed on this kind of image, giving a toy m...
Rosa M. Figueras i Ventura, Lorenzo Granai, Pierre...