Jerry Avins wrote:
> satish wrote:
>> 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.
> 
> "Compression" has two meanings: reduction in size (or bit rate), and 
> reduction of volume range. No one can help you without knowing which you 
> need.

And reduction in size has different meanings. Do you want lossless 
compression, like FLAC? Gentle general purpose compression, like MP3? 
Aggressive source specific compression, like G.729?

Steve

On Mar 5, 2:32 pm, "satish" <prakash.na...@gmail.com> wrote:
> 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

I would start at the TI website. They have many pointers to commercial
vocoders (assuming that is what you mean by compression). There are
free implementations floating around for some of the older vocoders,
but I believe you'll find that isn't the case for modern algorithms
that you would find in a mobile phone.

John

satish wrote:

> HI , i am satish doing my MS. I need c programming code for audio
> signal compression.

There are two types of compression commonly applied to audio signals:

   - dynamic range compression
   - data rate compression

You should really specify which you are talking about.

However, people rarely get complete working code just by asking
for it here. They often get advice, pointers to useful papers/books/
websites or simply pointers for the right direction.

Erik
-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo
+-----------------------------------------------------------+
"Linux is produced to be used, whereas the others are produced
to be sold"  -- Bobby D. Bryant

satish wrote:
> 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.

"Compression" has two meanings: reduction in size (or bit rate), and 
reduction of volume range. No one can help you without knowing which you 
need.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

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