Questions tagged [speech-synthesis]

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Understanding Baum's auxiliary function used in Hidden Markov Model

I am studying HMM from "Fundamentals of Speech Recognition" by Rabiner. Regarding the problem of how to adjust the parameters of a HMM, the proposed method was Baum Welch method (Expectation-...
Anantha Krishnan's user avatar
1 vote
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Advantage and Disadvantage using Mel Spectrograms over STFT in speech/waveform synthesis

I want to ask you a question about the waveform synthesis or more spesifically speech synthesis. Most of the state-of-the art papers use mel-spectrograms as their inputs, because it mimics the human ...
Yalçın Cenik's user avatar
2 votes
2 answers
445 views

What is the explanation that filter EQ changes "Ah" to "O"?

I recorded myself saying "Ah" in the tone of the note C3 which is about 130Hz, this is what it looks like: Then I ...
google dev's user avatar
1 vote
1 answer
289 views

How to generate human voice fft?

I want to generate human voice using fft. For this, I analyzed a fft of my mother saying "e" and the result was that the points are in a normal distribution. Then I created a fft using a ...
Eleno's user avatar
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1 answer
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Implementing Statistical Pitchmark Correction Method formula in programming code

I am trying to follow along a paper: The IVO Software Blizzard 2007 Entry: Improving Ivona Speech Synthesis System This paper explains how automatically estimated pitchmarks (certain time periods in ...
tmighty's user avatar
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How to generate PSHC carrier used in vocoders

Vocoders are often used to acoustically simulate the information transmitted by a cochlear implant. The different types of vocoders used in cochlear implants include noise-vocoding, sine-vocoding and ...
Deepa's user avatar
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1 answer
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Hw does a digital piano work?

I know someohow it combines different harmonics to synthsis note, but I don't exactly know how this happens. Does digital piano use pwm to synthesis a note?
Ardawan's user avatar
1 vote
2 answers
360 views

Conceptually confused by LPC for speech: Do we synthesize by the inverse filter (FIR)?

I've been following the process of using LPC to analyse the speech and then synthesize the speech by swapping out coefficients over time. I'm purely concerned with pitched vowels at this point. ...
Aditya TB's user avatar
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Capture the ambient sound

I sit in a cafe and start recording my voice, reading a poem. Then I sit at my room, at complete isolation, and I read the same exact poem once again and record it. Now, Considering I have these two ...
William The conqueror's user avatar
4 votes
2 answers
5k 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: $$\...
MrHat's user avatar
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2 votes
1 answer
287 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 ...
Robert Dawson's user avatar
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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 ...
Chrizzldi's user avatar
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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 ...
Onirom's user avatar
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2 votes
0 answers
393 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 ...
JustAMartin's user avatar
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1 answer
318 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 ...
shivani's user avatar
1 vote
1 answer
55 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 ...
stock username's user avatar
1 vote
1 answer
72 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. ...
stock username's user avatar
2 votes
0 answers
123 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 ...
panthyon's user avatar
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1 vote
1 answer
3k 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 ...
Cerin's user avatar
  • 618
1 vote
1 answer
3k 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 ...
Surendra's user avatar
1 vote
2 answers
534 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 ...
user2721828's user avatar
0 votes
1 answer
96 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 ...
alvas's user avatar
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3 votes
3 answers
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?
K V Vijay Girish's user avatar
14 votes
1 answer
208 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 ...
hotpaw2's user avatar
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