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Questions tagged [speech-synthesis]

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1answer
49 views

Mel Cepstral Distortion

I am working on a speech synthesis model and I am looking to evaluate my synthesized speech. I found that most people use the Mel Cepstral Distortion (MCD) which can be calculated by the formula: $$\...
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11 views

Analysis by synthesis in speech coding

I am trying to understand the analysis by synthesis in speech coding. In wikipedia it is mentioned for the CELP encoder: The main principle behind CELP is called Analysis-by-Synthesis (AbS) and ...
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1answer
113 views

Computation of parameter filter to match a given frequency response

I'm looking for the practical way to compute the parameters ($a_1$, $a_2$) of a digital filter to match a certain frequency response. I'm studying the 12-poles filter of the vintage component SP0256 ...
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1answer
70 views

Is there a known correlation between human voice (360Hz to 5kHz) and the frequencies above/below that?

Hello SignalProcessing! Given the important frequencies of a human voice (360Hz to 5kHz) to communicate and the frequencies above and below that make the voice sound way better. Imagine we are ...
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0answers
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Bandwidth enhanced sinusoidal model with oscillators banks

i am currently implementing the bandwidth enhanced sinusoidal model for an additive synthesizer, this model allow to accurately produce noisy sounds by adding a noise component to each sinusoids. But ...
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0answers
241 views

How to use linear predictive coding to compress voice diphone samples?

I'm working on an experimental diphone / unit selection speech synthesizer for my native language which lacks good speech synthesizer for blind people. The problem is that recorded unit library can ...
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1answer
186 views

TTS - Diphone database

I am working on text to speech conversion. I have done speech synthesis by concatenation of phonemes.The transition between phonemes is not smooth.I want to shift to diphone synthesis. Where can ...
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1answer
49 views

Effect of redundant training data in HMM-based speech recognizer/synthesizer?

How are redundant training data handled during the training stage? For example, assume we have one observation for phone $\theta$ in the training set. Then the training (for a monophone) is done ...
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1answer
65 views

Why are the observation features of an HMM-based recognition/synthesis system modeled by a Gaussian distribution?

Why are the observation features (namely MFCCs) of an HMM-based recognition/synthesis system modeled by a Gaussian distribution? Even the state duration is modeled by a Gaussian in this paper: K. ...
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0answers
104 views

What is actually transmitted following LPC of a speech frame?

For each frame, what's sent over to the receiver for decoding? The coefficients , pitch in some bits, voiced/unvoiced classification in another bit? Another broad question to develop intuition about ...
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1answer
872 views

Removing vocoder effect from audio file

There are many tutorials and guides explaining how to create a "robotic" voice by using a vocoder or a mix of filters that change pitch, tempo and maybe add a slight echoed delay. However, is it ...
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1answer
2k views

In framing of audio samples', what is need of frame shift while giving frame size??

In framing of audio samples' in audio feature extraction, what is need of frame shift while giving frame size?? i.e. frame size = 20ms, frame shift = 10ms. Rather then shifting/overlapping why ...
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2answers
343 views

PSOLA how to calculate synthesized Marks

I have successfully extracts all Pitch Markers from waveforms, I used autocorrelation to find my pitch periods, The markers can be observed in the figure below: I want change my signal (Pitch or ...
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1answer
82 views

Sample text to collect all possible English biphones for Text-To-Speech

Since the list of phonemes in English is fixed, it should be possible to come up with a sample text(s) to collect all possible biphones for text-to-speech synthesis. Does anyone have a sample text ...
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3answers
3k views

How to simulation different kinds of Noises in speech signal?

What are the different kinds of noise in speech signal? How can I simulate the same in Matlab for adding to a clean speech signal?
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1answer
159 views

Speech synthesis requiring very little CPU performance?

Back in the days of 1 MHz 8-bit CPU personal computers (Apple II, Atari 800, et.al.), there were software programs that could do comprehendible arbitrary text-to-speech synthesis on those PCs. What ...