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User: Manan Bothra

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Posts by Manan Bothra

<prev • 135 results • page 1 of 14 • next >
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Answer: A: Explain an LPC based synthesizer using a block schematic. What is assumption use
... ![Typical LPC synthesizer][1] ![LPC synthesizer for speech][2] (i) The synthetic speech is provide with the necessary spectral, envelope, matched formants without the formants being explicitly identified by the LPC filter. (ii) Although this creates an intelligible speech but it does not produce ...
written 6 days ago by Manan Bothra0
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Answer: A: Explain speech synthesis using phone-based synthesizer
... ![Training mode system for phoneme-based synthesis][1] ![Synthesis mode system for phoneme-based synthesis][2] The system operates in two modes: a) Training mode; b) Synthesis mode (i) The training mode record different words. Phonemes of appropriate duration are cut from the recorded words and ...
written 6 days ago by Manan Bothra0
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Answer: A: Draw the block schematic for text-to-speech synthesis system and explain the fun
... ![Block schematic for text-to-speech system][1] (i) The front end does two function, the first of which is to convert raw text containing symbols, such as, number and abbreviations into equivalent words. (ii) This process is termed as normalization or pre-processing or tokenization. (iii) The sec ...
written 6 days ago by Manan Bothra0
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Answer: A: What is HMM? What is hidden it? Draw a state diagram for HMM as general case and
... (i) A Hidden Markov Model (HMM) is a statistical Markov model where a system to be modeled is assumed as a Markov Process with unobserved or hidden states. (ii) A strategy which make use of stochastic model of speech production is known as Hidden Markov Model (HMM). It is found to offer performance ...
written 6 days ago by Manan Bothra0
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Answer: A: What are the limitation of DTW?
... (i) Number of templates are limited. (ii) It is only specific to a particular speaker. (iii) Need actual training examples. (iv) It can produce pathological results. The crucial observation is that the algorithm may try to explain variability in the Y-axis by warping the X-axis. This can lead to ...
written 6 days ago by Manan Bothra0
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Answer: A: Explain dynamic time-warping with regard to speech recognition
... **Dynamic Time Wrapping (DTW):** (i) We have to find the best possible warping of the time axis for one or both sequence for optimal comparison. The criterion to be used will be the minimization of global error. The problem is formulated as sequential optimization strategy in which the current es ...
written 7 days ago by Manan Bothra0
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Answer: A: What are problems with speech recognition system?
... (i) The ASR problem can be considered as a mapping from a speech signal to a sequence of phonemes, words and sentence. (ii) The major obstacle to high accuracy recognition is the large variability in the speech signal characteristics. (iii) The variability is categorized as linguistics variability ...
written 7 days ago by Manan Bothra0
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Answer: A: Write the state of art of speech recognition
... (i) Tremendous advances have been observed in ASR systems in the past decades. The word recognition error rates has reduced by factor of 5. (ii) Fast recognition algorithm have been developed into increase the recognition rate several time. (iii) Speaker-independent speech recognition is made poss ...
written 7 days ago by Manan Bothra0
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Answer: A: Explain the covariance method
... (i) Another method for solving the normal equation is the co-variance method. In this method, the original signal s(n) is used instead of using the windowed signal. To minimize the error: $$ E_m = \sum_{n=m}^{m+N-1} [s(n) - \sum_{p=1}^{k} a_p s(n-p)]^2 $$ Solving the equation $ \frac{\partial E_m} ...
written 7 days ago by Manan Bothra0
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Answer: A: Draw a block schematic for channel encoder and decoder and explain operations
... (i) Channel vocoders: Channel vocoder models the vocal tract as bank of band-pass filters. The analysis filter at the transmitter side finds the average square value of energy for input speech 50 times per second. ![Channel vocoder transmitter block][1] ![Receiver for channel vocoder][2] (ii) Bas ...
written 7 days ago by Manan Bothra0

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