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ICASSP
2011
IEEE
13 years 3 months ago
Resolving spatial sampling effects in parametric directional filtering
Directional Audio Coding (DirAC) represents an efficient scheme to analyze and reproduce spatial sound; the coded stream consists of a single-channel audio signal and few paramet...
Markus Kallinger, Michael Buerger, Oliver Thiergar...
ICASSP
2011
IEEE
13 years 3 months ago
A new data hiding method using angle quantization index modulation in gradient domain
A robust data hiding scheme that embeds the watermark bits by quantizing the gradient directions of an image is proposed. By embedding the watermark in the angle, the watermark be...
Ehsan Nezhadarya, Z. Jane Wang, Rabab K. Ward
ICASSP
2011
IEEE
13 years 3 months ago
Compact support kernels based time-frequency distributions: Performance evaluation
This paper presents two new time-frequency distributions based on kernels with compact support (KCS) namely the separable CB (SCB) and the polynomial CB (PCB) TFDs. The implementa...
Mansour Abed, Adel Belouchrani, Mohamed Cheriet, B...
ICASSP
2011
IEEE
13 years 3 months ago
Discrete regression methods on the cone of positive-definite matrices
We consider the problem of fitting a discrete curve to time-labeled data points on the set Pn of all n-by-n symmetric positive-definite matrices. The quality of a curve is measu...
Nicolas Boumal, Pierre-Antoine Absil
ICASSP
2011
IEEE
13 years 3 months ago
Frequency selective pitch transposition of audio signals
Modern music production often uses pre-recorded pieces of audio, so-called samples, taken from a huge sample database. Consequently, there is an increasing demand to extensively a...
Sascha Disch, Bernd Edler
ICASSP
2011
IEEE
13 years 3 months ago
Sparse decomposition of transformation-invariant signals with continuous basis pursuit
Consider the decomposition of a signal into features that undergo transformations drawn from a continuous family. Current methods discretely sample the transformations and apply s...
Chaitanya Ekanadham, Daniel Tranchina, Eero P. Sim...
ICASSP
2011
IEEE
13 years 3 months ago
A novel vector quantization-based video summarization method using independent component analysis mixture model
In this paper, we present a new independent component analysis mixture vector quantization (ICAMVQ) method to summarize the video content. In particular, independent component ana...
Junfeng Jiang, Xiao-Ping Zhang
ICASSP
2011
IEEE
13 years 3 months ago
Transceiver optimization for multi-user multi-antenna two-way relay channels
In this paper, we study a multi-user multi-antenna two-way relay system, where a multi-antenna base station (BS) exchanges uplink and downlink signals with multiple users via a mu...
Can Sun, Chenyang Yang, Yonghui Li, Branka Vucetic
ICASSP
2011
IEEE
13 years 3 months ago
A general Bayesian algorithm for visual object tracking based on sparse features
This paper describes a Bayesian algorithm for rigid/non-rigid 2D visual object tracking based on sparse image features. The algorithm is inspired by the way human visual cortex se...
Mauricio Soto Alvarez, Carlo S. Regazzoni
ICASSP
2011
IEEE
13 years 3 months ago
Approximation of pattern transformation manifolds with parametric dictionaries
The construction of low-dimensional models explaining highdimensional signal observations provides concise and efficient data representations. In this paper, we focus on pattern ...
Elif Vural, Pascal Frossard