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0
votes
0answers
25 views

0 accuracy on test data with 24 MFCCs

I have designed a classifier for "bols"(strokes) of the tabla, using the MFCC coefficients 2-13 (ignoring the first coefficient.) at the onsets. When I do a cross validation, I get approximately 46% ...
0
votes
1answer
29 views

Feature vector for MFCCs

I am working on a project, for which I am finding the onset times of an audio and then extracting the MFCC coefficients for all the times. Thus if I have n onset times, I would have n feature ...
0
votes
2answers
50 views

Determine the time length of audio training samples?

Currently I am trying to use MFCC feature for audio training in order to do human voice classification (can later distinguish the person who speaks). I have problems to determine the proper time ...
0
votes
2answers
36 views

How to organize MFCC features?

I have computed 12d-MFCC features on 3 consecutive audio frames, say: ...
0
votes
0answers
23 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 ...
1
vote
1answer
65 views

MFCCs and chord recognition

This is my first time working with Mel-frequency cepstral coefficients and I have two questions.... Are some of the 13 coefficients strictly related to some sound properties like frequencies, ...
0
votes
1answer
65 views

Speech recognition using mfcc and neural network

I am doing the project on speech recognition.I have implemented both the mfcc features and neural network.I am a bit confused in joining the two blocks.For example i have three different words with ...
0
votes
0answers
46 views

Ads detection using MFCC and DTW

I am doing a project to detect Advertisements from transmission by using clipped segment (slogan) of an advertisement, based on looking at the audio track as follows: Audio Signal $\rightarrow$ ...
0
votes
1answer
48 views

MFCC extraction for speaker verification

Regarding extraction of MFCC from speech signal... I have checked for the detailed procedure of extraction of MFCC from ...
-1
votes
1answer
43 views

Regarding MFCC feature of a speech signal

Please experts I'm in need of your help... I am trying to implement speech recognition using speech signal.. i'm struck with few question.. There are 12 Coefficients of MFCC.. What are theirs ...
1
vote
1answer
271 views

Feature extraction for sound classification

I'm trying to extract features from a sound file and classify the sound as belonging to a particular category (eg : dog bark, vehicle engine e.t.c). I'd like some clarity on the following things : 1) ...
1
vote
1answer
117 views

Normalizing a vector with Mel Cepstrum Coefficients, Delta Coefficients and Log Energies for both

This is my very first signal processing exercise so I'm very new to this space. That being said the goal is to do isolate voice recognition in identifying someone saying yes and no.As the title ...
2
votes
1answer
85 views

If MFCC vectors are speaker independent, then how can we reconstruct unique speech signals from them?

Reconstructing a speech signal from a collection of MFCC vectors seems to work pretty well, but I've heard that one advantage of MFCCs is speaker-independence i.e. they are more-or-less the same ...
3
votes
3answers
185 views

Is this a correct interpretation of the DCT step in MFCC calculation?

This is a continuation of the discussion here. I would comment there, but I don't have 50 rep so I'm asking a new question. Here's how I understand the DCT step in the MFCC calculation process: The ...
1
vote
1answer
106 views

How to get Envelope of Audio Signal

I am having a problem understanding how the author gets the onset envelope of an audio song in this paper. The entire section in question has been quoted below: First the input sound is resampled ...
0
votes
0answers
26 views

How distinct should MFCC vectors be?

I'm mid way through creating an embedded speaker verification system and I'm unsure if I'm using/calculating my MFCC vectors correctly. I've hit a brick wall. Essentially given two speakers with ...
0
votes
0answers
66 views

Vector Quantization LBG algorithm

I'm in the process of using MFCC features to train a VQ CodeBook using the LBG method. My results don't appear correct. Can you spot any error in my training algorithm? I'm using C. Acquire input ...
0
votes
2answers
78 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
74 views

MFCC, uncertain of my results and algorithm

I've started to implement an MFCC algorithm on an embedded DSP, using the CMSIS DSP library. However the results I'm getting don't appear consistent. This is my algorithm so far: Gather 32ms PCM ...
0
votes
2answers
117 views

Using MFCC to an ANN Speech Recognition System

I'm developing an Artificial Neural Network based Speech Recognition System using MFCCs. Suppose I have 260 input nodes in the ANN, and this number of nodes corresponds to the number of MFCCs that I ...
-1
votes
1answer
130 views

Spectral Envelope from MFCC

I'm obtaining MFCC by using the function wave2mfcc from the Speech and Audio Processing library (SAP) from here http://mirlab.org/jang/matlab/toolbox/ The steps follows the procedure: Take the ...
0
votes
1answer
381 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: ...
0
votes
0answers
49 views

How to add 2 MFCC extracted features to a variable?

I am working on signal processing for speaker verification. I have extracted MFCC features for few wav files using GMM algorithm. Now, i want to add any 2 MFCC features to another variable. How can ...
0
votes
0answers
68 views

Obtain current time in sound file from DTW

I have two sounds files, sampled at 16kHz, with the exact same spoken sentence, and I want to align those. I'm using the festvox tool set to create the ...
0
votes
1answer
92 views

How to Reduce Speech Feature Dimensions?

I have been experimenting with speaker independent automatic speech recognition. At this point, I understand that the signal is typically segmented into overlapping frames and MFCCs are extracted as ...
0
votes
2answers
136 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
174 views

How to compare 2 matrices of MFCCs, keeping the time information

I have a corpus of several thousand sounds. Now I pick a sound sample S, and I want to find in my corpus the sound S' that is the most similar to S. The application is for music, for a composition ...
0
votes
0answers
83 views

On application of MFCC for sound classification. How to normalize MFCCs

I have found some explanations on MFCC and specifically on application of DCT. I feel like I am slowly getting to the point but I still find a lot of things that confuse me. Below is the part of the ...
3
votes
2answers
250 views

Gentle request for explanation on LPC and LPCC coefficients :)

If I understand what LPC does, I think. It predicts the next sample by taking into account previous $p$ samples. I don't understand why it is useful in DPS and speech recognition. I also came across ...
0
votes
0answers
743 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
548 views

Using DTW on the MFCC's to match a spoken word to a template

I am trying to code a simple algorithm in Matlab that would be used to detect a single word. The goal would be to have a user record the word one time to act as a template, then make the user repeat ...
0
votes
0answers
33 views

Collecting phonemes automatically from audio transcript

I was wonderin is it possible to collect what are the phonemes in a language if I have some audio transcript? I was trying some simple approach. I have some annotated audio record. I calculated ...
1
vote
1answer
248 views

Training k-NN classifier with MFCC data

I am doing a personal project which aims to detect infant cry. I have an infant cry audio database and extracted the MFCC from these files using MATLAB. I've come up with 12 coefficients for each ...
0
votes
1answer
332 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 ...
1
vote
2answers
506 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
102 views

Evaluating clustering result

I am working with phoneme clustering. I have been using $k$-means clustering have done $k$-means on 2 different data: spectrogram vector and MFCCs. I would like to know how I can evaluate the result ...
2
votes
0answers
141 views

Questions about Bark scale filter bank implementation for bfcc's

I have a few questions regarding the implementation of Bark scale filter banks for the calculation of bark frequency cepstral coefficients. 1) Which filter shape is most commonly used and why? ...
0
votes
1answer
127 views

Speech Recognition [closed]

I am new learner in the field of speech analysis. I am wondering there are so many resources which explaiins principles of speech recognition. Most of them are advanced topics. I am curious to know ...
1
vote
0answers
88 views

Extract Word Information From MFCC

I am making a pronunciation Scoring system, and I need to know how to separate the pronunciation information of an MFCC of a given spoken word, so that later i can match this MFCC with the MFCC of ...
0
votes
2answers
162 views

DCT step suppress high frequencies in MFCC extraction process

I'm trying to get MFCC from speech audio data. I'm using 26 Mel Filter on 0-24kHz spectrum. My MFCCs doesn't look correct to me, cause always first bins have high values and values getting smaller ...
2
votes
1answer
636 views

MFCC feature extraction

I have a block of audio and I have performed an FFT on it. Now what I want to do is convert this FFT into a set of MFCCs, however while I know I need to do something with weighting the FFT samples ...
3
votes
2answers
829 views

Using MFCC in spoken words recognition

We're trying to implement a "simple" speech recognition application in MATLAB (isolated words from a very limited dictionary). We've been trying the following methods: Extract MFCC coefficients for ...
2
votes
1answer
197 views

What is the purpose of the log when computing the MFCC?

The steps of computing the Mel-Frequency Cepstrum Coefficients (MFCC) are: ...
4
votes
0answers
119 views

Zero padding of mfcc coefficients

I am trying to implement speech recognition using backpropagation algorithm, and I have been following this paper http://research.ijcaonline.org/volume42/number12/pxc3877946.pdf. I have followed it ...
0
votes
0answers
89 views

How to measure the short-time change in an audio signal?

The choice of frame length for calculating the Mel Frequency Cepstral Coefficients of a signal, depend on the how much the signal change over a small time scale. I guess that human speech change ...
1
vote
1answer
541 views

What is the DTW result (applied to the MFCCs of an audio file) proportional to?

I have computed the MFCCs for two audio files and applied the DTW to both sets of coeficients for both files. Now each such pair the two files is described by one single value (computed by the DTW). ...
3
votes
2answers
1k views

How to stitch together MFCCs from multiple frames?

I am trying to record a sound two times and compare the two recordings. I am playing exactly the same sound both times (for example, play a small .wav file twice and record it each time), so I hoped ...
2
votes
0answers
152 views

Most efficient algorithm for comparing two paths

I'm working with a Continuous Hidden Markov Model, and using the Viterbi Decoder which finds the best possible path for a given sequence. Here is how my algorithm works: ...
1
vote
1answer
340 views

Hidden Markov Models - Distinct Observation Symbols

I really, really hope someone can help me with regards to this question. I'm trying to implement a Hidden Markov Model (based off this paper: Here I understand the processes, but, I do not ...
2
votes
0answers
107 views

Dynamic Time Warping - Comparing Values

Ok, so I'm trying to compare two different speech signals and I have come into a problem. Here goes: I have split the signal into blocks, and I have computed the MFCC coefficients of each block. I ...