The tag has no wiki summary.

learn more… | top users | synonyms

0
votes
1answer
31 views

The logarithm Energy measure in Speech

I am studying the mel-frequency cepstral coefficient (MFCC) and have downloaded a pdf which is related to MFCC from this link. It is about the "ETSI ES 201 108" ETSI ES 201 108 - Speech ...
2
votes
0answers
52 views

How do I construct input to neural network from audio signals?

Input: Microphone recordings of digits from 0 to 9 from different speakers. Output: The digit from 0 to 9. I am doing this for fun. So first I will train my neural network using some samples and ...
0
votes
1answer
42 views

What is best practice to remove static noise?

What is best practice/algorithms to remove static noise from speech ? static noise aka Stationary Signal/static noise due to 1.humming sound due to of telephonic line/channel, 2.moving Vehicle,or ...
0
votes
1answer
36 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 ...
0
votes
2answers
51 views

Confusion regarding bilinear transform

I was reading my book where the z-transform of a signal is derived to be ${1-e^{-2bT}z^{-1}}$ . Then it goes on to say that by applying the bilinear transform we can get ...
1
vote
2answers
160 views

Confusion regarding reverberation time (RT60) calculation

I have some confusions regarding reverberation time (RT60). I need to calculate reverberation time from a given power envelope. This is what I get. As you might see the line is curved close to zero ...
-1
votes
1answer
48 views

Parameters for signal analysis

I am extremely new to signal analysis. And before posting I did a lot of reading on signal analysis, FFT and windowing. I am working on my thesis which involves comparison of speech signals lets say ...
1
vote
2answers
95 views

When should we using moving average in algorithm design?

I'm new to signal processing. And I just read G.720.1. I find there is a lot of moving average used. And I can also recall there is a lot of moving average been used in other audio processing ...
1
vote
0answers
30 views

I'm interested in the state-of-the-art of vocal sound synthesis. Please advise me [closed]

Some of the things I'd like to accomplish: Strip the vocals from a recorded song as best as possible Recreate someone's song voice (like a famous artists') using someone else's voice as input Adjust ...
2
votes
2answers
53 views

What do cloud-based speech-to-text services upload to the cloud?

Services like Siri and Google Now perform speech recognition (speech-to-text) on mobile phones by doing part of the computation on a server in the cloud. What do they upload to the cloud? Do they ...
1
vote
0answers
32 views

Speech features that can be inverted?

I am trying to figure out speech features that can be inverted to recover the audio back with no loss or as less loss as possible. I am currently using the power spectrum which is completely ...
0
votes
1answer
73 views

Is it necessary to taper two ends before fft a time series?

I saw in some codes people always taper the ends of a signal using a cosine taper. Is that necessary and why?
1
vote
1answer
77 views

Log energy calculation

I have some code here that I don't quite understand. It calculates the energy for a given frame the following way: En=log(1+energy(32767*frame)) The energy ...
0
votes
1answer
52 views

Good methods for hardware based 1-2 word speaker independent speech recognition?

I want to detect, in real-time, a 1-2 word spoken phrase within continuous speech, speaker independently, in hardware. The smaller the number of gates the better. What is the best way to do this? Are ...
0
votes
2answers
70 views

is there a mathematical relation between percent overlap and window length or amplitude

I am trying to plot short time energy of an utterance with percent overlap as an input variable. As I referred to the short time energy equation it can be represented as square summation of ...
0
votes
0answers
38 views

Time of sound-signal

Let's say I have a sound file, I then compute the Spectrogram and segment each part of it. Assume that it is a recording of someone saying the word "Hello" and therefore, each piece is given like so: ...
1
vote
1answer
170 views

Voice Audio Detection algorithm

I have to detect speech intervals in large pre-recorded files in my project. I think, there won't be so much noise in the background (audio will be recordered in the room or even in the studio), but ...
-1
votes
2answers
47 views

How to check the quality of an audio through an algorithm or software program

Can you please help me with this problem?? I have been working on AM335x sitara evm and my project needs self diagnosis of the captured audio from the mic through the speaker on the same board (we ...
0
votes
1answer
316 views

MFCC Deltas, Delta-Deltas

I have just a quick question about how to calculate Deltas from MFCC. I have found the formula for calculating deltas here: ...
1
vote
1answer
39 views

How to detect time of arousal with excitation signal in speech signal?

I have several seconds of speech signal and I have to detect moments in time of arousal with excitation signal, which is creating by larynx. I'm looking for useful reference since several days. I know ...
1
vote
1answer
63 views

Can't compute real cepstrum of real signal

I'm trying to compute the real cepstral coefficients of recorded telephone audio in Matlab using the rceps function. On some audio frames (480 samples per frame -- 60ms of audio at 8kHz), I get a ...
0
votes
1answer
55 views

Quantifying the energy of a voiced frame

What should the energy, pitch frequency, and zero crossing rate of a voice/unvoiced/silence frame in signal be? My professor said that it is experimental, but I do not have any idea what the factors ...
0
votes
1answer
103 views

In voice recognition system, how to match digital input to a given word without seconds delay?

I've been looking around and found some great C/C++/Java libraries like CMU Sphinx or Windows SAPI. I did not like SAPI, and CMU Sphinx is way too complicated... would need months to understand how it ...
0
votes
2answers
121 views

Algorithm to detect if a spoken phrase matches a previously spoken phrase

I would like to create a very simple system that allows a user to train (once or multiple times) a spoken phrase (from 1 word to a whole sentence.) Then the (same) user would speak the phrase back, ...
1
vote
1answer
192 views

cceps (complex cepstrum) function in Matlab

My doubt is in regards to the usage of the function cceps in Matlab. The function is giving me the cepstrum for the entire speech signal of 3 or 4sec. This works ...
1
vote
0answers
99 views

audio features extraction using restricted boltzmann machine

I want to extract Audio Features using RBM (Restricted Boltzmann Machine). For this, I am giving the spectrogram (PCA whitened) as an input to the RBM. For each audio file, The spectrogram is a matrix ...
0
votes
0answers
28 views

Mutual information between speakers utterance

I want to compute the Mutual Information (MI) between each sub-band of the speakers. However, I am confused about it. Let's explain it in other way. Suppose that we have N speakers who pronounce M ...
0
votes
1answer
368 views

How to compare vocal words in matlab

We as a group are new to signal processing and speech recognition. We have stored .wav sounds of three different words and we are trying to record a new .wav sound and have the system compare the ...
0
votes
0answers
679 views

MFCC calculation (edited)

I've got a project and need to calculate MFCCs. I tried to read some tutorials and then make a MATLAB function but I seem to have wrong answers. I'd like to feed MFCCs to one of the classification ...
2
votes
2answers
130 views

Where can I get a database of speech signals?

For a classification sort of experiment using Matlab, I am in need of a database of male and female voices. So where can I get links of such open databases.
1
vote
0answers
77 views

Reducing frequency of a signal

I have a signal that I want to make it sound like a whisper. This is probably better than using a voice conversion system, but I was just want to do some experimenting before. I was thinking maybe ...
2
votes
1answer
1k views

Why should one use windowing functions for FFT?

So I just revised my pitch calculation algorithm using a harmonic product spectrum algorithm. I was just curious about why this explanation of Harmonic Product Spectrum states that you need to ...
1
vote
1answer
170 views

Introduction to speech processing with code and examples?

Can anyone suggest an introduction to speech processing, class notes or books accompanied by programs that can be run to see what the algorithms do ? For example, in Burrus et al., Computer-Based ...
0
votes
1answer
22 views

Decoupling consonant phoneme

This question follows from Designing a sound that localises well I am developing an experimental system for pitch training. I am giving each of the 12 pitch-classes {C CD D DE E F FG G GA A AB B } ...
0
votes
1answer
49 views

Speech Signals - Recognition vs Analysis [closed]

I am looking at working broadly in the area of Speech Signal Processing, and would be grateful if someone can clarify these doubts! 1) Are there any differences between Processing and Analysis of ...
0
votes
1answer
161 views

Speech discrimination from animal sound

i am looking for discrimination of speech from animal sound if you take a 150ms frame of speech and bird as shown below, what feature can i extract from them so that i can effectively state the ...
0
votes
1answer
308 views

Confusion regarding wav to MFCC conversion

I have to compare two .wav files. I am converting the wav file to an MFCC file. Why am I getting different MFCC matrices when using different Matlab toolboxes (one of them is giving a matrix having ...
0
votes
2answers
68 views

Concepts / Algorithms for recognising words in the Time-Domain

I'm currently working on a project that involves in Speech and recognising Phonemes (in kind of real-time). The current algorithm works by always listening for input from the Mic, and input that is ...
0
votes
1answer
328 views

Relationship between frame rate and sampling frequency in speech signal processing?

While I was going through the short time processing of speech signals, I got stuck at the relationship between the frame rate and the sampling frequency. Is there any relationship between them for ...
1
vote
2answers
235 views

what does musical noise sound like and is there a sample clip for it?

Musical residual noise is created when a noisy signal passes through a noise reduction algorithm. For instance, please see the paper: Esch, T; Vary, P: "Efficient Musical Noise Suppression for Speech ...
1
vote
2answers
488 views

Difference Between MFCC of speech and speaker recognition

I am doing my project on speaker recognition. One of my friends is doing his project on speech recognition. Both of us need to calculate the MFCC for feature extraction. Is the MFCC going to be the ...
1
vote
1answer
864 views

Advantages and disadvantages of Hilbert-Huang Transform versus Fast Fourier Transform? [closed]

Which one is better for frequency detection? In what circumstances? Advantages and disadvantages of both? Which would be better for a Voice Activation Detection algorithm? Which would be better for an ...
1
vote
1answer
158 views

Speech / Audio Separation

I'm looking for a way to implement a Speech Separation from a .wav file. Let's say I have a .wav signal containing the following words: "The cat flew away" Now I ...
0
votes
0answers
34 views

Speech signal Quality & Speech signal improvement

I'm trying find authoritative references for [1] Which analyzing techniques (time/frequency domain) i should use for determining the quality of a speech signal. [2] Which algorithms i should run ...
1
vote
0answers
31 views

Examples of cases where “invariance to transformation” on signal is important

I realize that this might not be the most well-formulated question, but I figured I'd throw it out there as an open-ended discussion that could turn up some interesting input. I'm relatively new to ...
0
votes
2answers
109 views

How to remove salt & pepper noise from speech signal?

I'm having a lot of problems with my project: I added salt and pepper noise by inbuilt function I DWT function with Haar family Now I want to remove noise from original speech signal. I don't know ...
1
vote
1answer
70 views

Measure of harmonicity in a time-series

I'm analyzing speech signal for identifying voiced and unvoiced regions. Voiced regions are supposed to have a "pitch", which can be estimated using auto-correlation function (ACF). Basically, one ...
-1
votes
1answer
216 views

Removing surrounding noises from voice recording

I have a wave file whose frequency spectrum looks like this. It contains audio, which I want to keep while removing the rest. The problem is that the surround noise changes, just those distinct ...
0
votes
1answer
133 views

Speech recognition library for detecting phrase in file

I want to find all occurrences of a specific phrase in a set of audio files (it's a catch-phrase in a TV show). The phrase is pronounced by different people with different speed etc. What is the best ...
5
votes
3answers
1k views

How do I go about detecting whistles, pops and other sounds in live audio input?

I've read many questions on SO, and frankly, each one of them is not describing any particular way to go about it. Some say "do fft" and some say "zero crossing" etc. But I've only gone as far as ...