Deepak Gala

New Mexico State University | NMSU · Department of Electrical and Computer Engineering

In this paper, we present two approaches to localizing and tracking a sound source that moves in a three-dimensional (3D) space. The sound signal was captured by a unique bi-microphone system that rotates at a constant angular velocity. The motion of the sound source along with the rotation of the bi-microphone array produces a sinusoidal inter-cha...

While vision-based localization techniques have been widely studied for small autonomous unmanned vehicles (SAUVs), sound-source localization capabilities have not been fully enabled for SAUVs. This paper presents two novel approaches for SAUVs to perform three-dimensional (3D) multi-sound-sources localization (MSSL) using only the inter-channel ti...

In this paper, we present three approaches to localizing and tracking a sound source moving in a three-dimensional (3D) space using a bi-microphone array rotating at a fixed angular velocity. The motion of the sound source along with the rotation of the bi-microphone array results in a sinusoidal inter-channel time difference (ICTD) signal with tim...

This work presents a novel technique that performs both orientation and distance localization of a sound source in a three-dimensional (3D) space using only the interaural time difference (ITD) cue, generated by a newly-developed self-rotational bi-microphone robotic platform. The system dynamics is established in the spherical coordinate frame usi...

While vision-based localization techniques have been widely studied, sound source localization capabilities have not been fully enabled. In this dissertation, I present novel three-dimensional (3D) sound source localization (SSL) techniques based on only inter-channel time difference environment. Both the azimuth and elevation angles of a stationar...

This paper presents a novel three-dimensional (3D) sound source localization (SSL) technique based on only Interaural Time Difference (ITD) signals, acquired by a self-rotational two-microphone array on an Unmanned Ground Vehicle. Both the azimuth and elevation angles of a stationary sound source are identified using the phase angle and amplitude o...

While vision-based localization techniques have been widely studied for small autonomous unmanned vehicles (SAUVs), sound-source localization capabilities have not been fully enabled for SAUVs. This paper presents two novel approaches for SAUVs to perform three-dimensional (3D) multi-sound-sources localization (MSSL) using only the inter-channel ti...

This work presents a novel technique that performs both orientation and distance localization of a sound source in a three-dimensional (3D) space using only the interaural time difference (ITD) cue, generated by a newly-developed self-rotational bi-microphone robotic platform. The system dynamics is established in the spherical coordinate frame usi...

This is a simple presentation for the beginners in ROS and takes you through creating a package, creating a new node, creating a new topic, publishing to a topic and subscribing to a topic. It is assumed that you are already familiar with these terminologies and aims to clear concepts of the ROS environment.

While vision-based localization techniques have been widely studied for small autonomous unmanned vehicles (SAUVs), sound-source localization capabilities have not been fully enabled for SAUVs. This paper presents two novel approaches for SAUVs to perform three-dimensional (3D) multi-sound-sources localization (MSSL) using only the inter-channel ti...

Speech enhancement aims to improve the speech quality by using various techniques. Spectral Subtraction Technique is one earliest and longer standing, popular approaches to noise compensation and speech enhancement. It reduces stationary noise but the non stationary noise still passes through it. Further, it also introduces a musical noise which is...

In all speech communication settings, the quality and intelligibility of speech is of utmost importance for ease and accuracy of information exchange. The speech processing systems used to communicate or store speech are usually designed for a noise free environment but in a real-world environment, the presence of background interference in the for...

In all speech communication settings the quality and intelligibility of speech is of utmost importance for ease and accuracy of information exchange. The Spectral Subtraction Technique is one of the methods to reduce stationary noise but the non stationary noise still passes through it. Spectral Subtraction also introduces a musical noise which is...