On temporal masking

Started by Anonymous in comp.dsp11 years ago

Can anyone link an article and/or happen to know if it has been investigated how much of the total compression temporal masking contributes to?

Can anyone link an article and/or happen to know if it has been investigated how much of the total compression temporal masking contributes to?


normalize spech waveform using matlab (please need your help)

Started by Anonymous in comp.dsp12 years ago

any one please give me any idea as i have to submit this after two days and i do not have good information about matlab how to normlize a...

any one please give me any idea as i have to submit this after two days and i do not have good information about matlab how to normlize a speech form so that it is magnitude is always between -1 and 1 then how to compress it using mu compression with mu =255 usin matlab


Using AR-MAX for compression

Started by Tim Wescott in comp.dsp3 years ago 1 reply

https://www.youtube.com/watch?v=RxZVMc2kjZQ -- Tim Wescott Wescott Design Services http://www.wescottdesign.com I'm looking for work...

https://www.youtube.com/watch?v=RxZVMc2kjZQ -- Tim Wescott Wescott Design Services http://www.wescottdesign.com I'm looking for work -- see my website!


DSP_PROCESSOR RELATED PROJECT

Started by dsp_gene in comp.dsp14 years ago 7 replies

HI ACTUALLY I AM PURSUEING A UNDERGRADUATE COURSE & AM INTERESTED IN DOING MY FINAL YEAR PROJECT IN DSP..MY PROF SUGGESTED I COULD EITHER TAKE...

HI ACTUALLY I AM PURSUEING A UNDERGRADUATE COURSE & AM INTERESTED IN DOING MY FINAL YEAR PROJECT IN DSP..MY PROF SUGGESTED I COULD EITHER TAKE UP IMAGE COMPRESSION TECHNIQUES OR I COULD TAKE UP SOMETHING LIKE CHANNEL MODELLING..NOW,COULD U TELL ME WHAT SHOULD I TAKE UP??BECAUSE BOTH THE TOPICS ARE RELATIVELY NEW TO ME..HOWEVER I DO HAVE A SOUND BASIC UNDERSTANDING OF SIGNAL PROCESSING AND DE...


from comp.compression

Started by jacko in comp.dsp13 years ago 18 replies

this is on tristate numbering system it may have some uses http://abhijit.info/tristate/tristate.html would this make a comp.tsp news...

this is on tristate numbering system it may have some uses http://abhijit.info/tristate/tristate.html would this make a comp.tsp news group, or would it be more appropriate here? cheers


A question about voiceprinting

Started by Jerry Avins in comp.dsp12 years ago 1 reply

Determining whether a particular individual is the speaker in a recorded message is pretty routine, especially when the original recording...

Determining whether a particular individual is the speaker in a recorded message is pretty routine, especially when the original recording device is available for making comparison recordings. MP-3 and some other voice compression methods remove much of the "unimportant" detail. I've been wondering how much uncertainty that might introduce into voiceprinting. Does anyone here know? Je...


hi

Started by satish in comp.dsp13 years ago 4 replies

HI , i am satish doing my MS. I need c programming code for audio signal compression. The code should be compatible to run on...

HI , i am satish doing my MS. I need c programming code for audio signal compression. The code should be compatible to run on TMS320c55x platform. The software used for this is "code composer studio". Can any help me out fr getting the code for the above topic. Regards satish


bit rate question

Started by A.E lover in comp.dsp12 years ago 1 reply

hi all, Assume I have a DIGITAL signal with M samples. My compression program using N bits to encode each sample. What is the bit rate of...

hi all, Assume I have a DIGITAL signal with M samples. My compression program using N bits to encode each sample. What is the bit rate of my program? is it N or M/N?? Thanks //


Seeking Free Frequency analysis toolkit or examples

Started by David Chen in comp.dsp16 years ago 5 replies

Hi, I'm currently a 17-year-old student trying to do a project, involving embedding data within an audio file. Hopefully, it will survive...

Hi, I'm currently a 17-year-old student trying to do a project, involving embedding data within an audio file. Hopefully, it will survive MP3 compression... so I've come to the conclusion I will have to convert all the samples to the freq. domain to do any analysis. I downloaded FFTW and I have it working, but it assumes that the user knows what he's doing (which I do not really). I f...


ULAW ALAW and RFC2833

Started by staw...@yahoo.com in comp.dsp13 years ago 3 replies

I understand the need for using 2833 while using compression codecs. I was wondering if anyone could tell me why 2833 is used with...

I understand the need for using 2833 while using compression codecs. I was wondering if anyone could tell me why 2833 is used with ULAW/ALAW. Thanks in advance, Scott


Karhunen-Loeve Image Compression

Started by sularome in comp.dsp14 years ago 2 replies

hi all, I have for a student project to develop a software compressing images by the Karhunen-Loeve Transform (KLT) method. I've read 3 days...

hi all, I have for a student project to develop a software compressing images by the Karhunen-Loeve Transform (KLT) method. I've read 3 days and did not found anything useful in Google. :(( if anybody of you can send me something similar that he has developed or give me link with a good example i will be really grateful. thanks,


FAT for TMS320VC5509 or other TI DSP?

Started by Tomas Ahrne in comp.dsp16 years ago 7 replies

Hi all, I am trying to find some free, or at least not overly expensive, code to run a standard FAT (12, 16 or 32) system on a Texas' 5509. It...

Hi all, I am trying to find some free, or at least not overly expensive, code to run a standard FAT (12, 16 or 32) system on a Texas' 5509. It is for an MP3 player + a proprietary compression algorithm. The storage medium will probably be an SD card or a small hard disk drive. Any pointers will be appreciated. Tomas


Small, Battery powered DSP boards with support via PC

Started by _DS in comp.dsp14 years ago 7 replies

Does anyone have a low-power DSP board that I can use to get started on some experiments? I'm not a DSP programmer but I've been doing C/C++...

Does anyone have a low-power DSP board that I can use to get started on some experiments? I'm not a DSP programmer but I've been doing C/C++ for many years. I'd love to find something hosted via PC (Windows) with simple, decent C or C++ compiler. For now, I'm just thinking about experimenting with audio effects (flanging, compression, etc) but if I can get something working, I'd like to ...


Re: ANNOUNCEMENT: New image format

Started by Anonymous in comp.dsp12 years ago

John Costella writes: > * Lossless compression ratios comparable to those of PNG. Don't just say they're comparable - show us the...

John Costella writes: > * Lossless compression ratios comparable to those of PNG. Don't just say they're comparable - show us the data. Phil -- Dear aunt, let's set so double the killer delete select all. -- Microsoft voice recognition live demonstration


basic compressor question

Started by Jeff Roberts in comp.dsp14 years ago 27 replies

So, if we ignore the adaptive portion of a compressor, what is the difference between compression and just volume attenuation? Is it just that...

So, if we ignore the adaptive portion of a compressor, what is the difference between compression and just volume attenuation? Is it just that the amount of attenuation per sample in a compressor is based on value of the sample itself? -> Jeff


compression speed

Started by hyperbob in comp.dsp15 years ago 5 replies

Hello, I am wondering how much computation it takes to compress audio. This information is a little hard to come by. The general situation...

Hello, I am wondering how much computation it takes to compress audio. This information is a little hard to come by. The general situation is this: I am working on a program that will record either from the sound cards of several computers or from some card that provides several raw audio channels to be recorded from. I don't know how to estimate if I can compress all the audio in real ...


I want to Execute MATLAB file with TMS320C54X

Started by Anonymous in comp.dsp15 years ago 2 replies

Hi all, I did Image Compression task using SPIHT algorithm with MATLAb 6.5 code. Now i want to implement the same with TMS320C54X. How...

Hi all, I did Image Compression task using SPIHT algorithm with MATLAb 6.5 code. Now i want to implement the same with TMS320C54X. How can i do this with CCS ? Can any body help me ? But i do not want to copy the MATLAB Libabry files in to CCS. Thanks in advance, Sathish


Compressive Sensing

Started by Lemon Tree in comp.dsp10 years ago

There is some pretty amazing work being done on Compressive Sensing at the moment. Really it offers very lightweight compression of...

There is some pretty amazing work being done on Compressive Sensing at the moment. Really it offers very lightweight compression of sensor signals (allowing the data to be compressed by a cheap microcontroller for example). Followed by more complex decompression on say a PC. It's repercussions go way beyond that however into AI and data fusion. There is an introductory article here: http://...


Sound gaps

Started by Anonymous in comp.dsp11 years ago 4 replies

Hello, A while ago this group and comp.compression were very helpful in pointing to some websites to help develop my software sound...

Hello, A while ago this group and comp.compression were very helpful in pointing to some websites to help develop my software sound driver (note: aside from the DAC all processing/filtering is done in software.). Now I have a new problem where I don't know where to look for the answer(s) so I am begging for a little help. After lots of work in improving sound quality I just ran i...


compress the orchestra

Started by RichD in comp.dsp20 hours ago 9 replies

Occasionally I attend recitals, where the student performs a concerto. It's a bit of a financial stretch for the music department to hire an...

Occasionally I attend recitals, where the student performs a concerto. It's a bit of a financial stretch for the music department to hire an orchestra, so a second pianist accompanies, acting as the orchestra. Thus someone has to condense the entire orchestral section down to a single instrument! A mighty job of compression indeed. How do they do that? The conductor isn't a mat...