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64kbps PCM

Started by k seshu babu October 25, 2002
hi all

With DSK6711(16-bit codec) can we convert 16-bit PCM to
8-bit.Is their any method to do it without harming sample value too much

thank u all

seshu



One method is to use mu-law or A-law COMPAND Block.
This can be done easily by passing the samples thro'h
Compand hardware present in the Mcbsp.
You need not write any software function instead you
can use the on-chip hardware for this.

Simha

--- k seshu babu <> wrote:
> hi all
>
> With DSK6711(16-bit codec) can we convert 16-bit PCM
> to
> 8-bit.Is their any method to do it without harming
> sample value too much
>
> thank u all
>
> seshu





K Seshu Babu-

> With DSK6711(16-bit codec) can we convert 16-bit PCM to
> 8-bit.Is their any method to do it without harming sample value too much

Try u-Law, standard telephony method to compress samples to 8-bit. I don't
think the
feature is built into the AD535 codec on the DSK board, so you might try simple
software formula.

Jeff Brower
DSP sw/hw engineer
Signalogic