log energy of audio frame

Started by adamchapman in comp.dsp10 years ago 2 replies

Hi, sorry to post 2 questions in the same day but Ive been searching all day and got nowhere. Im trying to compute the log energy of an...

Hi, sorry to post 2 questions in the same day but Ive been searching all day and got nowhere. Im trying to compute the log energy of an audio frame. I am aware that the result of my calculation should be a sinle value for the whole audio frame, so it is not the log of the spectrum. I know that to find the energy of an frame you get the frame from the audio stream with a window functio...


audio and video driver on dm642

Started by in comp.dsp15 years ago 1 reply

I have big problem with my app. I'm using dm642 evm (Texas Instruments), and I need to use both video and audio input (in rf5 environment) ,...

I have big problem with my app. I'm using dm642 evm (Texas Instruments), and I need to use both video and audio input (in rf5 environment) , but I can't make them work together. I've added dio codec driver for aic23 audio codec and gio video(fvid interface) driver in dsp/bios module (i've used .cdb file from rf5 audio example and modyfied it to match my needs) but when i'm trying to run my ...


Looking for a good (cook)book on audio signal processing

Started by Mauritz Jameson in comp.dsp7 years ago 5 replies

I am looking for some (cook)books on advanced audio signal processing, audio effect algorithms, speech processing algorithms etc....

I am looking for some (cook)books on advanced audio signal processing, audio effect algorithms, speech processing algorithms etc. Preferably something that is up-to-date. I am thinking about buying the book "DAFX: Digital Audio Effects" I am looking for books which can improve my understanding and knowledge about the above topics. I love cookbooks which give detailed descriptions of how ...


c6713 audio project

Started by finnyfin in comp.dsp11 years ago 1 reply

Hello, I'm a computer engineering student and I'm new to the world of DSPs. I've decided for a major project to design a digital audio...

Hello, I'm a computer engineering student and I'm new to the world of DSPs. I've decided for a major project to design a digital audio effects proccesor, so that I can plug my guitar into it and have it add some effect in real-time and play it out. I'm having some trouble understanding how and where to do the actual processing of the audio signal. So far I've just been doing lots of reading, an...


Audio Mixing using DSP

Started by jadhav_rahul in comp.dsp11 years ago 14 replies

Hello everyone, i want to implement audio mixing for call conference with PCM encoded voice channels, I want to know how audio...

Hello everyone, i want to implement audio mixing for call conference with PCM encoded voice channels, I want to know how audio mixing is done by DSP ? and any suitable algorithm or document for it. also plz guide me how to proceed for its implementation? Thanks in advance, Rahul Jadhav.


Is it possible to determine whether a phone call is local or long distance by analyzing the audio?

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

Question: Is it possible to determine whether a phone call is local or long distance by analyzing the audio? Please see the thread: "If...

Question: Is it possible to determine whether a phone call is local or long distance by analyzing the audio? Please see the thread: "If only I could cleanup this audio, I could solve the JFK assassination..." in comp.dsp and rec.audio.pro for details. Perhaps there is a related newsgroup? TIA, -Ramon


OT: Stream high-quality audio via the Internet

Started by Jon Harris in comp.dsp14 years ago 2 replies

Does anyone know of a way to send a high-quality (better than telephone-quality) audio stream over the Internet? I would like to stream audio...

Does anyone know of a way to send a high-quality (better than telephone-quality) audio stream over the Internet? I would like to stream audio from my work to my home. I have a broadband Internet connection at both ends, and VPN is possible as well. There seems to be plenty of products that deal with telephone-quality audio (VOIP, voice-chat program, etc.), but I haven't found anything f...


how to improve AIC23 audio record system SNR level

Started by okeybomb in comp.dsp8 years ago 1 reply

My system`s main function is to sample audio datas,process,and play them back.The process core is a ST semi `s STM32F103RC processor,plus...

My system`s main function is to sample audio datas,process,and play them back.The process core is a ST semi `s STM32F103RC processor,plus TI`s TLV320AIC23B audio codec.Of course audio preamps(op amp).The power supply is a LM2576.Now the problem is,it is hard to handle the hole noise level of this system.Even no process(the signl is digitaly bypass inside the STM32),it still has a noise level about...


My own digital audio standard

Started by Dr. O in comp.dsp15 years ago 2 replies

If I could 'invent' a new audio standard I would simply use a CD-ROM with .WAV files on them. That way, almost any bit rate and sample size can...

If I could 'invent' a new audio standard I would simply use a CD-ROM with .WAV files on them. That way, almost any bit rate and sample size can be used and any number of channels as well (I think). With today's CD-ROM mechanism prices down to a couple of bucks (which are highly reliable and durable, much more so than ordinary audio CD mechanisms) and microcontrolllers which can operate it a...


Audio engineer

Started by John in comp.dsp15 years ago 7 replies

I am a software DSP engineer. I would like to consider a job as a DSP audio engineer. What type of algorithms I need to know ? I did some work in...

I am a software DSP engineer. I would like to consider a job as a DSP audio engineer. What type of algorithms I need to know ? I did some work in echo cancellation, and voice compression does this make me an audio engineer ? John


matching a reference audio signal in a VoIP environment

Started by tj in comp.dsp9 years ago 5 replies

hi, i'm trying to match reference audio signals (ranging between 1 sec and 10 seconds) in source audio signal from an RTP stream. i've used...

hi, i'm trying to match reference audio signals (ranging between 1 sec and 10 seconds) in source audio signal from an RTP stream. i've used cross-correlation, which works extremely well (spikes nicely) when there is not much time-altering of the reference audio as it is passed over the RTP stream (i.e., not much packet loss or packet re-ordering, and the local packet-loss-concealment / j...


Play audio WAV at RF

Started by James Barlow in comp.dsp12 years ago 1 reply

I have a WAV file which is a complex audio signal generated in PC music software. I would like to play it back at an increased speed of 100...

I have a WAV file which is a complex audio signal generated in PC music software. I would like to play it back at an increased speed of 100 times the original. For example, if the dominant frequency was 20KHz, the upper limit of audio, at playback it would be 2MHz. That is as high as I need to go. Obviously, this cannot be done, or output, from the PC alone. I assume some type of program...


Audio Jammers

Started by shruti in comp.dsp13 years ago 3 replies

Hi.. I need some information on Audio Jammers. I have to implement Audio Jammers in MATLAB and then have to convert the MATLAB into C-code...

Hi.. I need some information on Audio Jammers. I have to implement Audio Jammers in MATLAB and then have to convert the MATLAB into C-code and to TI DSK CCS. -Shruti


Audio Jammers

Started by shruti in comp.dsp13 years ago

Hi.. I need some information on Audio Jammers. I have to implement Audio Jammers in MATLAB and then have to convert the MATLAB into C-code...

Hi.. I need some information on Audio Jammers. I have to implement Audio Jammers in MATLAB and then have to convert the MATLAB into C-code and to TI DSK CCS. -Shruti


need help regarding wavelet

Started by para...@gmail.com in comp.dsp13 years ago 1 reply

Hi All, I am doing my thesis.I have to develope some algorithms for audio analysis. Actually,I have to record audio from mobile phone, and I...

Hi All, I am doing my thesis.I have to develope some algorithms for audio analysis. Actually,I have to record audio from mobile phone, and I have to test the audio for glitches,hiss, delay,distortion etc.We have selected wavelets for analysis because of resolution in time and frequency.I am using Matlab Wavelet toolbox for development. But,I am not sure ,how to use wavelets for this purpo...


Best platforms (DSPs and/or FPGAs) to develop high end audio/voice applications on?

Started by Anonymous in comp.dsp12 years ago 3 replies

Hi, This is a noob question - I'm doing some research in audio & voice, and I need some advice. What are the most popular platforms to...

Hi, This is a noob question - I'm doing some research in audio & voice, and I need some advice. What are the most popular platforms to implement high end audio & voice applications on? To be more specific, I'm looking at audio/voice applications that make heavy use of (large tap) digital filters, like vocal harmonizers, digital mixing consoles, and acoustic echo cancellers. What platfor...


Using a stereo audio ADC for baseband sampling.

Started by Eric Jacobsen in comp.dsp4 years ago 9 replies

This may ultimately be a dumb question, but I need to ask it. I'm looking at using a stereo audio ADC as an I/Q baseband sampler in a low-rate...

This may ultimately be a dumb question, but I need to ask it. I'm looking at using a stereo audio ADC as an I/Q baseband sampler in a low-rate communication system. One like this: http://www.ti.com/product/tlv320adc3001 I seem to recall some horror stories of using audio ADCs for general use, but I can't really seem to see any reason to not go this way. Am I missing something? Th...


audio transcoding

Started by DragosD in comp.dsp13 years ago 1 reply

Hi all, I was wondering if anyone can give me some information (links, forums, possible books) on audio transcoding topic. I've been assigned...

Hi all, I was wondering if anyone can give me some information (links, forums, possible books) on audio transcoding topic. I've been assigned this task and I need a starting point. I'm generally interested in audio transcoding but more specific in G.729.A or G.729.AB to G.723.1A transcoding. Now the trick is the transcoding path should be direct without going through G.711 Many thank...


Audio DSP Micro ?

Started by RealInfo in comp.dsp11 years ago 24 replies

Hi All I need some suitable DSP oriented microprocessor to do some audio effects with it like ECHO , FUZZ , TREMOLLO etc . My question is...

Hi All I need some suitable DSP oriented microprocessor to do some audio effects with it like ECHO , FUZZ , TREMOLLO etc . My question is which DSP micros are popular/suitable in the guitar/audio effects industry ? Thanks in advance ec


Serial Digital Audio filtering B.Eng Project HW help?

Started by Anonymous in comp.dsp14 years ago 12 replies

Hi, Thanks in advance to anyone who reads this and may offer some help. I am an undergraduate student and I have an idea for my big...

Hi, Thanks in advance to anyone who reads this and may offer some help. I am an undergraduate student and I have an idea for my big Capstone Project. I want to create a digital audio system. I have designed the basic SPDIF in-> upsample-> DAC-> analog audio out path using the many ASICS available today. To get a superlative grade, I want to insert a module in between the upsampler and th