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Incorporating prosodic information with spectral information at the feature level is challenging. In this paper, a method for feature level fusion of spectral and prosodic information is proposed. A pitch contour is first extracted from the frame blocked segments of the speech signal. These speech segments obtained herein are labeled as high pitch and low pitch segments. Both spectral and prosodic...
A novel method for binaural source localization using a HRTF data model with enhanced frequency diversity is proposed in this work. The method proposed herein is developed in the frequency domain and enhances the directional information in the sound signal for efficient broad band sound source localization even under conditions of low SNR. The directional information is enhanced by cancelling the...
In this paper, a novel method of horizontal plane Head Related Transfer Function (HRTF) interpolation is proposed. As Interaural Time Difference (ITD) manifests itself as Interaural phase difference in spectral domain, linear phase constraints are imposed to compute the interpolated HRTFs. Hence the phase of the interpolated HRTF is constrained as a weighted linear combination of the phases of adjacent...
Design of bionic ears is an important problem in the measurement of high quality HRIR for rendering binaural audio in virtual and augmented reality applications. In this paper the design and development of silicone based low cost binaural ears on a Styrofoam based mannequin is discussed. Subsequently a new sampling scheme which results in a reduced condition number of the spherical harmonics matrix...
Text messages are generally encoded by performing table look-up on fixed length code tables. In this paper, a lossless text compression algorithm which works on the principle of entropy reduction is proposed. Characters in a text message in any language are generally encoded using a binary string with a Unique Lexicographical Rank (ULR). A corresponding Maximum Rank(MR) for any binary string can be...
Short Message Service (SMS) via cell phones is a widely used mode of data communication. Currently employed encoding schemes allow the transmission of 160 characters per SMS in English. This drops to 70 characters per SMS if any Indian language including Hindi is used, due to the UNICODE format used therein. Schemes proposed to improve the encoding efficiency of short text messaging generally encode...
In this paper, a fast method for the extraction of pinna spectral notches (PSN) in the median plane of a virtual spherical microphone array is discussed. In general, PSN can be extracted from the Head Related Impulse Response (HRIR) measured by a spherical array of microphones. However, the PSN extracted herein are computationally complex and also not accurate at lower elevation angles. This work...
In this work, a method for multi channel speech enhancement using linear prediction (LP) residual cepstrum is proposed. The method performs deconvolution at each microphone output using cepstral domain. The deconvolution of acoustic impulse response from reverberated signal in each individual channel removes early reverberation. This dereverberated output from each channel is then spatially filtered...
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