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Questions tagged [speech]

The tag has no usage guidance.

6
votes
3answers
878 views

What do colored noises look like in the time domain?

I understand that the time domain representation of white noise looks like impulses. How do colored noises like brown, pink etc. look like when we perform an inverse Fourier Transform on them ? What ...
2
votes
2answers
831 views

Emotional Tone detection using audio on mobile phones

Which audio features should be used to detect tone from audio? Are there any open source frameworks or implementations which can be ported to mobile phones to process audio? Alternatively, would it be ...
8
votes
1answer
663 views

Detect human speech in realtime audio on mobile phones

I am looking to develop an Android app. As part of the functionality the app would require to randomly sample 3-5 seconds of audio and classify it as containing human speech or not. I understand that ...
3
votes
1answer
975 views

Identifying the age of a speaker using speech recognition

I am just wondering if it's possible to gather the age group of someone speaking in a sample? For example, could I tell whether the sample is a child, teenage, adult, etc?
6
votes
1answer
698 views

how does this equation correspond to smoothing?

Please help me understand smoothing of data. This is a follow up to my previous question posted here. Especially the top answer by Junuxx where he says a way of smoothing a function $f(x)$ is: $$ f'[...
2
votes
1answer
569 views

Speech Recognition Project - HMM

I am looking for advice on a project I am thinking about completing (for experience etc..) My project is triggering a set of traffic lights (simulation) using Speech recognition. In theory, I want to ...
2
votes
1answer
4k views

Calculating the total energy of a signal

I have a vector of signals and need to calculate the total energy. I have read somewhere that you can do this by summing up the entire vector and then finding the absolute value of the result. Is this ...
1
vote
1answer
115 views

HMM's - Possibility?

I have a basic understanding of HMM's and as a final year project at school wanted to expand my knowledge further. My basic idea was to create an algorithm that determines if someone is saying ...
0
votes
2answers
1k views

Speech Analysis - Zero-Crossing

Basically, (I know I've asked a simular question, but I have been away and really thought about it this time)! Let me try and explain this in the best way possible: Basically, I'm attempting to ...
3
votes
3answers
5k views

Speech Recognition - Project Idea

Wondering if someone could offer me any advice or help. Sorry if this question is too broad or anything. I'm wanting to complete an algorithm in basic Speech analysis. The algorithm will detect ...
6
votes
1answer
3k views

Speech Compression - In LPC how does the linear predictive filter work on a general level?

Hi I'm taking a multimedia systems course and I'm preparing for my exam on tuesday. I'm trying to get my head around LPC compression on a general level, but I'm having trouble with what is going on ...
18
votes
4answers
25k views

Libraries for Voice Activity Detection (Not Speech Recognition)

As follow up to my previous question I was wondering if there are any speech detection libraries in existence. By speech detection I mean passing in an audio buffer and getting back an index of where ...
0
votes
1answer
96 views

How best to digitize a noisy phone recording for filtering?

How do I digitize an analog telephone recording and filter it with a Chebyshev filter?
3
votes
1answer
314 views

Real-time single speaker recognition

I'm developing an application for PC that records microphone data in real-time, and plays it back after applying some effects. I'd like to apply these effects only when a single known speaker is ...
3
votes
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?
8
votes
2answers
247 views

What input to use for an AR model of a vowel sound?

I've recorded a 2-sec pronunciation of a vowel sound. The first 0.12 or so seconds of the signal are shown below. Now, I've constructed an auto-regressive (AR) 8th-order model to compress this signal....