Statistical analysis wavelet coefficients

Started by para...@gmail.com in comp.dsp13 years ago

Hi All, I am doing my thesis in audio analysis using Wavelet transform.I want to know that is it possible that after getting wavelet...

Hi All, I am doing my thesis in audio analysis using Wavelet transform.I want to know that is it possible that after getting wavelet coefficients, I can use some statistics to find glitches,pop or distortion in my audio data? I am new in this topic, so If I am thinking in diffrent direction then also please tell me.Basically, I want to test recorded audio from mobile phone for different...


Building Peak Files

Started by seij...@gmail.com in comp.dsp14 years ago 13 replies

I'm a complete newbie to audio processing but I'm working on a project that requires some audio imaging. The audio files will typically be...

I'm a complete newbie to audio processing but I'm working on a project that requires some audio imaging. The audio files will typically be 30 minute files that average about 256mb. I can graph the whole thing just file but it's slow and uses too much memory. So, I'm hoping to learn how to use peak files to speed up display times. I'm not looking for very detailed information (although th...


How to remove a track/signal from an audio clip?

Started by Ramon F Herrera in comp.dsp4 years ago 2 replies

Dear audio/DSP experts: Please go to my *Google Drive* and click once on the *AT&T* folder. http://goo.gl/Jm4bZ7 Watch the TV...

Dear audio/DSP experts: Please go to my *Google Drive* and click once on the *AT&T* folder. http://goo.gl/Jm4bZ7 Watch the TV commercial (MP4) and listen to the background music. Since my objective is to apply some *Voice Identification* process to the audio, as a preliminary step, I would like to remove the music. I have already identified the song as "You're My Best Frie...


Pseudo-random questions about a professional audio application

Started by Shaun in comp.dsp16 years ago 2 replies

Hello all, I've been toying with the idea of putting together a DSP box with some audio I/Os and am looking to get the highest quality audio...

Hello all, I've been toying with the idea of putting together a DSP box with some audio I/Os and am looking to get the highest quality audio fed into my DSP as possible. The engineering side of me wants to start by getting the skinny on 'the best' sampling techniques, ADCs, and pre-DSP stages to minimize (or ideally eliminate) quantization noise. However, the business side of me says I ...


Audio- Signal to Interference Ratio measurement

Started by shal in comp.dsp10 years ago 3 replies

Hello Sir, I am trying to run a lab test, where I am capturing an audio signal (running through computer speaker sampled at 48kHz) with a...

Hello Sir, I am trying to run a lab test, where I am capturing an audio signal (running through computer speaker sampled at 48kHz) with a microphone. Besides the main audio signal there are other cluttering/ background noises( laughing, people talking). Is there a way I can measure the SIR using a piece of hardware. Or else how do I do it. I wish to parameterize my room setting and hence ...


Get up and going with audio sound processing DSP development

Started by Aaron Gray in comp.dsp13 years ago 4 replies

Hi, Whats the cheepest way to get up and going with audio sound processing DSP development. I would like a system that I can connect to a...

Hi, Whats the cheepest way to get up and going with audio sound processing DSP development. I would like a system that I can connect to a computer with USB to program it, and have audio in and out connections, I am a programmer and am familuar with digital and analogue electronics. Many thanks in advance, Aaron


stored audio input

Started by Arul in comp.dsp13 years ago

Hello everybody, While working with TMS320C5416. I was asked to supply audio input through the mic input line or the line...

Hello everybody, While working with TMS320C5416. I was asked to supply audio input through the mic input line or the line input terminal through walkman/ CDplayer. is there any other option so that i can feed the audio stored in the computer hard disk. Awaiting Your Reply. Thank you Arul


Questions about equivalents of audio/video and digital/analog.

Started by Radium in comp.dsp12 years ago 290 replies

Hi: I=2E Audio vs. Video Digitized (mono) audio has a single sample per each sampling interval. In the case of digital video, we could...

Hi: I=2E Audio vs. Video Digitized (mono) audio has a single sample per each sampling interval. In the case of digital video, we could treat each individual sample point location in the sampling grid (each pixel position in a frame) the same way as if it was a sample from an individual (mono) audio signal that continues on the same position in the next frame. For example, a 640=D7480...


Speech audio file format, processing, archives and audio file reading codes/libraries

Started by Anonymous in comp.dsp4 years ago 1 reply

What is the current trend in using the audio file format ... aiff, mp3, wav ... ? What are the commercial speech recognition systems like...

What is the current trend in using the audio file format ... aiff, mp3, wav ... ? What are the commercial speech recognition systems like Nuance or Google API .... use? Are there any archives, where one can download recorded speech files? Finally, any codes (C++ or whatever)/libraries for reading audio files so these can be processed? Thanks


Plotting an audio file using matlab

Started by hamseda79 in comp.dsp14 years ago 2 replies

Hello, I am trying to plot an audio file using matlab. can i get a sinusoidal plot of the audio file if so what matlab command is useful?...

Hello, I am trying to plot an audio file using matlab. can i get a sinusoidal plot of the audio file if so what matlab command is useful? any help is appreciated This message was sent using the Comp.DSP web interface on www.DSPRelated.com


Audio Compressor/AGC in C or C++

Started by __GG in comp.dsp13 years ago 34 replies

I'd like to find source for audio compression classes or functions in C or C++. It would be nice if it had lookahead (slight delay is OK).

I'd like to find source for audio compression classes or functions in C or C++. It would be nice if it had lookahead (slight delay is OK).


Automatic RF noise cancellation and audio noise measurement

Started by Jason Hsu in comp.dsp16 years ago 33 replies

THE BIG QUESTION: How do you measure the audio noise level in a receiver? Does anyone here know of any circuits that show the overall audio...

THE BIG QUESTION: How do you measure the audio noise level in a receiver? Does anyone here know of any circuits that show the overall audio noise level? Let me tell you what this is all about. SIDE NOTE: Thanks again to those of you who helped me with the SWR/wattmeter project I worked on last semester. This project taught me more about ferrite cores, op amps, and diodes than ANY class...


US Universities for Electrical/Computer/Audio engineering

Started by audioGuy30 in comp.dsp12 years ago 4 replies

I want to pursue a PhD in Electrical/Computer/Audio engineering and would like a university that has active research for 3D audio (HRTFs)....

I want to pursue a PhD in Electrical/Computer/Audio engineering and would like a university that has active research for 3D audio (HRTFs). However, I don't want the typical suggestions that I receive like UC Davis, U Maryland College Park and MIT. I am aware of these programs. I am hoping that maybe there are some less know, but good programs, that I can try. The reason is I want to apply to as ma...


Comparing two similiar audio files, FFT?

Started by kieran in comp.dsp9 years ago 12 replies

Hello, I am trying to compare two similar audio files (WAV). From what i have read i need to sample both audio files at certain frequencies and...

Hello, I am trying to compare two similar audio files (WAV). From what i have read i need to sample both audio files at certain frequencies and run these through a FFT and then compare the results. Can anyone advise me if this is the correct approach and also describe the steps i need to take to get to the stage where I can compare the files. TIA, Kieran


choosing correct window size for audio cross-correlation

Started by oj in comp.dsp14 years ago 6 replies

Hello, I am looking for advice, or a push in the right direction for the appropriate selection of window size applied to an audio...

Hello, I am looking for advice, or a push in the right direction for the appropriate selection of window size applied to an audio digital signal. My intention is to cross-correlate two non-stationary audio signals obtained outdoors by a pair of adjacent microphones for the purpose of determining the time delay of arrival between them. Both have a sampling frequency of 44.1kHz. However...


Discrete Fourier Transform Question

Started by Erik in comp.dsp13 years ago 10 replies

I have a question for people knowledgeable about the DFT. In the digital audio workstation program "Cubase SX", there is a tool which performs...

I have a question for people knowledgeable about the DFT. In the digital audio workstation program "Cubase SX", there is a tool which performs a DFT on a given audio recording. I'm a bit puzzled by one of its features. Before it performs the DFT, it asks the user to input the size, in samples, of the analysis blocks that it will divide the audio into for processing. This makes sense to me. ...


Do-it-yourself audio effects device ?

Started by Tomi Kinnunen in comp.dsp12 years ago 19 replies

Dear DSP and audio gurus, I have a few years experience with DSP theory and practise, mostly in Matlab and related to speech processing. My...

Dear DSP and audio gurus, I have a few years experience with DSP theory and practise, mostly in Matlab and related to speech processing. My original background is in computer science; I am familiar with some "real" programming also :-) I've implemented some simple audio effects like EQ, chorus/flanger, and compressor. I've been thinking to extend my DSP and programming know-how to som...


Audio channel timing

Started by Grant in comp.dsp13 years ago 6 replies

Can someone point me in the right direction please? I need to calculate a unique time "marker" in a hi-fi (20Hz - 20 kHz) audio path during a...

Can someone point me in the right direction please? I need to calculate a unique time "marker" in a hi-fi (20Hz - 20 kHz) audio path during a sample period of a few seconds or so. It doesn't matter what sound event(s) go into the calculation or where the marker is placed with respect to any particular sound events in the audio path, so long as the marker is unique and repeatable. If n...


MP3 Audio Quality Enhancement

Started by kee in comp.dsp12 years ago 6 replies

Hi All, We are working to develop an Algorithm for Enhancing the Quality of compressed audio. We are thinking of having High...

Hi All, We are working to develop an Algorithm for Enhancing the Quality of compressed audio. We are thinking of having High Frequncy Reconstrucion. We are looking for the communities suggestion or experience on "High Frequency Reconstrucion of Compressed Audio". Will it Enhance the quality is the question? We also request the community to suggest some other means of Enhan...


IIR audio filterbank

Started by Robert Adams in comp.dsp9 years ago 19 replies

I am looking for a way to design an audio IIR filterbank. I need to split an audio signal into roughly 1/3 octave bands with 6th-order...

I am looking for a way to design an audio IIR filterbank. I need to split an audio signal into roughly 1/3 octave bands with 6th-order or 8th-order IIR bandpass filters and then sum them back together again with a ripple of +/- 1 dB. I can do a "seat-of-the-pants" design that works well until I approach Nyquist where it kind of falls apart. I have very limited MIPs so I can't do anything very...