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Tracking of stationary noise is not an issue when compared to non-stationary noise tracking as stationary noise properties remain constant throughout time. When noise properties itself is changing with time noise standard deviation estimation is found to be a better tool in analyzing noise properties. It is estimated to find out the noise power spectrum which is assumed to be same as noise variance...
The Throat Microphone (TM) is a non-acoustic device, relying on the vibrations of vocal folds rather than the audible sound produced. Correctly capturing vocal fold vibrations is difficult due to poor signal representation capabilities. The system recognizes the TM vibrations and produces the corresponding speech sound. This is done by extracting features from the spectrum of the TM vibrations and...
This paper describes the various frugal and sustainable practices followed in a middle-class household in Kerala, the south-western state of India. The need of the hour is to provide methods that promote the use of sustainable practices. An automated watering technique for household gardening, and a low-cost grid-independent biomass gasification stove that uses coconut husks have been proposed in...
Speech coders based on the linear prediction model are widely in use today. This paper describes the algorithms of low bit-rate vocoders, viz. Code-Excited Linear Prediction (CELP) and Mixed Excitation Linear Prediction (MELP) and their performance for Indian dialects. A Linux platform has been used for execution of the vocoders. Mean Opinion Score testing has been performed with speech samples of...
This paper describes the analysis of the audio and speech output of the 16 kb/s Low Delay CELP algorithm (LD-CELP). For various speech file conversions, the SoX (Sound eXchange) tool is used. Praat software is used to extract details regarding the quality of the sound synthesized by the coder. The C program of the coder was compiled using the GCC compiler in the Linux environment and executed using...
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