C66x (C67x) audio codec

netrover

We are using C66x (compatible with the C67x) and need to compress audio signal after it is received into the C66x. Our audio signal is coming into the C66x in I2s format, through the McASP interface, at 192kbps (8,000 samples per sec, at 24 bits per sample). We need to compress the audio signal to about 4 kbps. I have been searching and finding various audio codecs, but need some expertise on how to solve this problem on the C66x.

over 10 years ago

0 Senthilkumar Srinivasan over 10 years ago

TI__Mastermind 43660 points

Hello Dan,

What is the exact part number of the DSP you are using ?

Regards,
Senthil

0 Ankit K over 10 years ago

Prodigy 115 points

I would like to know where the input from "Line In" port of CODEC is stored in memory of C6713.
Pleas help.

0 Sivaraj Kuppuraj over 10 years ago in reply to Ankit K

TI__Mastermind 35645 points

Hi,

It should be from the internal RAM of C6713 DSP. I would reecommend you to go through the lab doc as below which involves programming the TMS320C6713 DSP Starter Kit (DSK) module:

http://ecee.colorado.edu/~fmeyer/class/ecen4532/lab6.pdf

The AIC23 codec on DSK6713 is connected to two multichannel buffered serial ports (McBSPs), McBSP0 and McBSP1. McBSP0 is used to send commands to the codec control interface while McBSP1 is used for digital audio data. Once the codec is configured, the control channel (McBSP0) is normally idle while audio data is being transmitted on McBSP1.

You can find a simple program from

Wiki: http://processors.wiki.ti.com/index.php/File:C6713_audio_minimal.zip

You could also download the board support files from specturn digital webite on the prerequisites on the wiki below:

http://processors.wiki.ti.com/index.php/C6713DSK_in_CCSv5

Thanks & regards,

Sivaraj K

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C66x (C67x) audio codec