To the Editor: Contrast-enhanced magnetic resonance imaging (CE-MRI) is an important imaging modality for the evaluation of isolated left ventricular noncompaction (LVNC). The delayed gadolinium enhancement has been identified in both compacted and noncompacted myocardium, and it may correlate with the clinical severity of LVNC (1–3). However, little is known about the histological basis of myo...

This paper proposes a novel method of speech enhancement using tensor factorization, which is extended from complex non-negative matrix factorization (CMF), in the modulation frequency domain. Non-negative matrix factorization (NMF) has attracted a great deal of attention as a recent approach to speech enhancement for its ease of feature detection in the acoustic frequency domain. However, prev...

We present new methods to segregate concurrent speech sounds using the auditory image model and a vocoder. The auditory representation of sound referred to as an 'auditory image' preserves fine temporal information, unlike conventional window-based processing systems. This makes it possible to segregate speech sources with an event synchronous procedure. Fundamental frequency information is use...

In this paper we propose a speech enhancement method based on using the wavelets theory and the envelope expansion technique. The proposed method does not require an explicit estimation of the noise level or of the a priori knowledge of the SNR, which is usually needed in most of enhancement methods. Performance of the proposed method was evaluated on speech recorded in real conditions and with...

for the WA97 collaboration) The WA97 experiment studies the production of strange and multistrange particles in Pb{Pb and p{Pb collisions at 158 GeV/c per nucleon. Recent results on and production ratios and transverse mass distributions are reported and compared with those obtained by WA85 and WA94 experiments. A signiicant enhancement of the // ratio has been observed when going from nucleon-...

A speech enhancement technique based on the temporal masking properties of the human auditory system is presented. The noisy signal is divided into a number of sub-bands with fractional bark accuracy, and the sub-band signals are individually and adaptively weighted in the time domain according to a short-term temporal masking threshold to noise ratio estimate in each subband. Objective measure...

BACKGROUND AND PURPOSE The association of high-grade oligodendrogliomas with tumor contrast material enhancement on MR images has been reported. Some authors have even used contrast enhancement as a criterion for their oligodendroglioma grading system. The purpose of our study was to evaluate if tumor contrast enhancement is a specific finding for anaplastic oligodendroglioma. METHODS Pretrea...

1 College of Communication Engineering, Jilin University, Changchun 130012, China ([email protected]) 2 School of Electronics and Information Engineering, Shenyang Aerospace University, Shenyang 110136, China Abstract A subspace based speech enhancement algorithm with low complexity is proposed by using our improved subspace iteration method. Due to the use of the iteration, the proposed algorithm ...

This paper proposes a novel broad-band noise reduction technique in stereophonic situations. The method utilises a combined non-recursive multi-stage sliding subspace projection and adaptive signal enhancement. Simulation results based upon real stereophonic speech contaminated by broad-band noise components show that the proposed method yields a performance improvement in the speech enhancemen...