P. Satyanarayana Murthy

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In this paper, we propose a new method of processing speech degraded by reverberation. The method is based on analysis of short (2 ms) segments of data to enhance the regions in the speech signal having high signal-to-reverberant component ratio (SRR). The short segment analysis shows that SRR is different in different segments of speech. The processing(More)
In this paper, we study the robustness of a groupdelay-based method for determining the instants of significant excitation in speech signals. These instants correspond to the instants of glottal closure for voiced speech. The method uses the properties of the global phase characteristics of minimum phase signals. Robustness of the method against noise and(More)
The need for, and choice of, radiological staging investigations for distant metastases in the management of head and neck squamous cell carcinoma is a contentious issue. To address this problem a retrospective audit of routine computerized tomography (CT) and ultrasound scanning of the chest and abdomen respectively was undertaken. The records of 103(More)
In this paper we propose a method for enhancement of speech in the presence of additive noise. The objective is to selectively enhance the high signal-to-noise ratio (SNR) regions in the noisy speech in the temporal and spectral domains, without causing signi®cant distortion in the resulting enhanced speech. This is proposed to be done at three di€erent(More)
BACKGROUND AND PURPOSE Patients with traumatic brain injury (TBI) and low Glasgow coma scale (GCS) scores may have severe injury associated with cellular disruption that can be studied with whole-brain apparent diffusion coefficient (ADC) histograms. We retrospectively studied this hypothesis and correlated ADC with GCS. METHODS Twenty-one patients (37.81(More)
We have recently demonstrated that the calmodulin antagonist trifluoperazine has antitubercular activity in vitro against Mycobacterium tuberculosis H37Rv susceptible and resistant to isoniazid. It is now shown that trifluoperazine at a concentration of 50 micrograms ml-1 when added to the cells along with the labelled precursors inhibited the incorporation(More)
Sixty-four consecutive patients with a history of recurrent epistaxis were randomly assigned in the outpatient clinic to receive treatment with either Naseptin antiseptic nasal carrier cream alone (Group A) or a combination of Naseptin cream and silver nitrate cautery (Group B). Results were available on 50 patients, 22 in Group A and 28 in Group B. Twenty(More)
In this paper we propose a method for enhancement of speech in the presence of additive noise. The objective is to selectively enhance the high SNR regions in the noisy speech in the temporal and spectral domains, without causing signiicant distortion in the resulting enhanced speech. This is proposed to be done at three diierent levels: (a) At the gross(More)
An audit project was undertaken to appraise the outcome of 95 cases of septal surgery over a 12-month period, taking into account the subjective alteration of symptoms, appearances at anterior rhinoscopy and complications. Seventy-three patients (76.8 per cent) attended the follow-up clinic three to six months (median four months) after surgery. There was(More)
Fifteen cases of nasal septal perforation were repaired with a tragal cartilage--temporoparietal and deep temporal fascia sandwich technique using a modification of the approach previously described (Hussain and Kay, 1992). Successful closure was achieved in 14 patients (100 per cent) after an observation time of up to two years. The operative technique and(More)