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15 views

Spectral Smoothing via Cepstrum

I have been trying to do something that I thought was very simple, and failing terribly: I have been trying to smooth the spectrum of a frame of audio, by transforming into the cepstral domain and ...
2
votes
2answers
55 views

How do can we cancel out noises while listening voice on headphones?

It's a common problem that while talking with the another person on Smartphones with the help of regular headphones,we get very annoying sounds at background . The opposite person's voice gets mixed ...
-1
votes
1answer
41 views

MFCC from DFT (FFT)

I want to write an speaker recognition application (based on some password recorded few times for the authorized person). I've decided to do it with C++ and BASS library (http://www.un4seen.com/). I ...
0
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0answers
45 views

FFmpeg audio filter pipeline for speech enhancement

Using ffmpeg, I'm recording a talk, its audio with a semi-distant microphone. It makes sense to somewhat enhance the speech clarity, reduce background static and ...
0
votes
2answers
107 views

'A priori' and 'a posteriori' SNR

I am reading this paper about speech enhancement using a minimum mean square error short time spectral amplitude estimator for our speech enhancement project. Basically in the paper they mix a clean ...
0
votes
1answer
32 views

Methods in Singing Synthesis [closed]

I want to know more about the latest attempts to create synthesizers for singing. I would ideally like to know more about both the most widely respected algorithms/models as well as mainstream ...
0
votes
1answer
46 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 ...
0
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0answers
29 views

Mel vs. Gammatone filterbank

After some research about the problem of segmenting voice from unvoiced sounds I found that most of the papers deal with an operation to simulate the cochlea filtering of the signal. I found two ...
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0answers
60 views

Removing self-emitted background noise from audio

I've been working with speech recognition and kinect lately. Now i made a simple media player I can control by speech. It works pretty good (thanks to Kinects AEC?) but not quite reliable. Now I ...
0
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1answer
31 views

Pronunciation research for app [closed]

Hello does any one know or at least can lead me to the right way? What does not change pronunciation of words when someone is speaking. The idea is to create a app that checks if word/sentence is ...
0
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0answers
59 views

MFCC gives poor results for speaker identification

I trained my program by using 2 GMM algorithms for speaker identification. I used 32 MFCC features for the first GMM and the f0 feature for the second GMM. There are 6 speakers . And for each speaker ...
0
votes
0answers
22 views

voice mimicking [duplicate]

My wife passed away 5 years ago when my grandson was one. He now has a sister that is 1 1/2. I'd like to find a way to have a children's story read to them in her voice. Is their a way of doing ...
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0answers
33 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
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2answers
73 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 ...
3
votes
1answer
133 views

Detecting changes between voice and music

I have a bunch of audio files that have both speech and music parts (think radio). For instance, a given file might consist of the following sections: ...
0
votes
2answers
107 views

Compare two words from different speakers

I have a set of audio files which contain a word each one, and I'd want to be able to compare a new word (coming from a smartphone mic) to check if it resembles to a specific file and how much it ...
0
votes
1answer
87 views

Comparing an audio signal with a previous 'taught/profiled' signal

I'm working on a audio sample recognition project, where first you profile a sound and then run the sound detection function. Currently during the 'profile' stage I'm grabbing copies of the ...
3
votes
2answers
150 views

What is the state of the art for vocal elimination/reduction?

I have no background in signal processing but I would like to know what is the actual state of the art for vocal elimination/reduction. Obviously, I am not talking about the infamous "stereo ...
1
vote
1answer
349 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 ...
0
votes
1answer
67 views

recognizing words in a sentence

I want to know that what features might be needed for recognizing a word i a sentence exactly? I guess the routine for recognizing the word in a sentence is ganna follow this: 1-calculate voiced and ...
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votes
3answers
1k views

What are Chunks when recording a voice signal

I am having trouble understanding the example program for audio recording , it comes with PyAudio module. I am using an external Audio Card to record the sound , obviously, the voice should be ...
0
votes
1answer
81 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 ...
1
vote
1answer
104 views

Speech Enhancement Libraries

Is there any speech enhancement algorithm library? I need to process a sound to voice recognition, and I want to remove noise from audio source.
0
votes
1answer
673 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 ...
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1answer
99 views

Most accurate method of Voice Activity Detection?

What is currently the most accurate Voice Activity Detection algorithm with high levels of background noise? I would also appreciate if it does not require any manual calibration. Bonus points for ...
1
vote
1answer
78 views

How do you choose a size for a windowing function in FFT?

How does one choose the proper windowing function to apply in an FFT? What are the benefits of larger sizes and smaller ones? Which would be the best for pitch estimation? Also which window function ...
1
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0answers
43 views

Get excitation from two signals

I have two signals, one whisper data and one normal voice data of the same sentence. I'm trying to build a voice conversion, but just want to start off with some simple signal manipulations. I ...
0
votes
1answer
62 views

What factors determine synchronous signal transmission ability of a channel?

So I am Designing a system which would be able to send and receive stereo voice signals.( like a telephone but with full-band stereo voice signals) here is an example to make my question clearer. In ...
0
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1answer
118 views

How to distinguish between recorded and a live vocal signals?

Is it possible to detect if a sample of human voice by smartphone/computer(44Khz) is sourced from another electrical device or originated from a human being I ...
0
votes
1answer
66 views

Speech Activity Detection- Adhoc Problem with multi source sounds(birds,trees,heavy air) and how to eliminate them completely

Here i will first try to put my application agenda Typically i am sampling at 8Khz rate and filtering speech components using a BPF(digital) now i have got the 0-4Khz components in which ...
2
votes
2answers
137 views

Comfort Noise Insertion in VAD algorithms

I am in a intention of Porting Voice Activity Detection algorithm in real time hardware,so i was successful in classifying speech and silence/noise but now the problem is replacement of silence frames ...
0
votes
2answers
122 views

In Search of Voice Activity Detection Algorithms - What happens to the frequency or pitch or speech features as speaker moves away from microphone

Actually i am in search of a Voice Activity Detection Algorithm which could distinguish between voice and non-voice Roughly speaking it must not detect even a bullet sound,even a foot stepping and ...
2
votes
1answer
246 views

Estimation of Glottal Closure Instant

Glottal Closure Instants (GCIs) are referred to the instances of significant excitation of the vocal tract. I have seen in some papers that I can measure instant of glottal closure in a voiced segment ...
1
vote
1answer
74 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
vote
1answer
70 views

voice recognition

during Zimmerman trial, each camp claimed the yell for help recorded belonged to their side. given that Zimmerman is still aside and the recording still exist, could there be some scientific way to ...
0
votes
2answers
1k views

voice pattern matching algorithm

My idea is to find a word in wav/mp3 files. It is just one word. I have a database with a few hundred songs. I am looking for pattern matching (this is not an exact pattern) it can be an word i ...
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0answers
1k views

Filtering voice signal from randomly added frequencies

I have this assignment that I can't figure how to solve. I have a sound.wav human-voice file, and use matlab add-random-noise (monotonic) Goal: to remove the noise from the sound (and the sound from ...
1
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1answer
173 views

Detection of regions of voice in music

I want to detect the regions of voice in a song. Currently, I am using the fact that the vocals in the song are recorded as center panned. So, I am removing all center panned audio from the song. ...
0
votes
1answer
123 views

Detect when someone has stopped talking

What's an extremely efficient way of detecting when a user has stopped talking into a microphone? When I use systems like Siri it can detect when I've stopped talking almost immediately, even when ...
4
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2answers
623 views

How does Songify work?

Does anyone know how does the "Songify" app algorithm work? There are 2 inputs: speech (or amateur singing), and underlying music. Somehow the speech is altered and mixed into the music. Which ...
1
vote
1answer
600 views

About voice filtering

I have a waveform containing voice some children screaming some times when there is no noise at all some times there are cars driving by when talking I want to detect the start and ending times ...
1
vote
1answer
82 views

Establishing Phrase Frequency in Audio Files

Is there any Application, Programming Library or Theory that could be used to identify human language phrases in a set of audio files, so as to calculate the frequency of occurrence of each such ...
3
votes
3answers
19k views

How to mimic/copy/fake someone's voice?

Is there any existing application to sample someone's voice and use it to modulate any other voice or synthesize a text to resemble the original one? For example, this Text-to-Speech Demo by ...
5
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3answers
194 views

Why does the excitation signal appear, separated, at high quefrencies in the cepstrum?

So, I've just begun a speech and language processing course and have found the explanation of the process of getting the cepstrum of a signal and its properties a little confusing. The following is a ...
3
votes
1answer
267 views

Acoustic features distinguishing the male and female voice?

I would like to use MFCC analysis to distinguish between a male voice and a female voice. Are there any particular quantifiable characteristics consistent with, and exclusive to, either gender? ...
6
votes
2answers
766 views

Filter message from noisy voice signal

I am trying to decipher a message hidden within a very noisy audio file(.wav)(I think it is white noise with an additional low drone). The message is a six digit number. I have not have any further ...
5
votes
2answers
1k views

How is a human whistle a pure sine wave?

According to Wikipedia human whistling is a pure sine wave. If that is true and if a human is whistling and produces a rhythm like any song, is he still producing a pure sine wave? For example, if I ...
5
votes
3answers
169 views

Why are the bass components of music more audible than other components?

Consider a situation where I am listening to loud music in a room. If I move into another room and close the door (so music is now played in another room behind the closed doors), I will hear the bass ...
4
votes
2answers
542 views

How is it possible to Filter out a person's voice out of 100 of other voices?

So, I've just learned that the human voice is not a single sine wave its a bunch of unlimited Sine waves each having a different frequencies, According to Wikipedia, The voice consists of sound ...
3
votes
1answer
580 views

Library to differentiate people by their voice timbre

Say there are 3 people in the room. Each of them have a unique voice timbre. I want to recognize people by their timbre and know who's speaking.