From: Ivy <ivy@cashette.com>
To: bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] Voice setting for U-law and A-law.
Date: Sat, 24 Sep 2005 03:20:36 -0700 (PDT) [thread overview]
Message-ID: <8441772.1127557236734.JavaMail.Administrator@appsrv> (raw)
Hi Marcel,
Thanks for your information. I wentthrought the Documentation and our Mailing list.. Please bare with me for asking this silly questions .... Still i m confused about INPUT Data Format,INput sample size and PCM BIT POSITION. Please correct me if i am wrong. I HAVE choosen in the following way.. (Right now my usb driver claimed 2nd alternate setting (isoc=2). i.e One voice connection with 16 Bit encoding & 2 Voice connection with 8 Bit encoding .
0101101000 = 0x168
Bitwise that"s:
xxxxxx01xxxxxxxx Input Coding: u-law
xxxxxxxx01xxxxxx Input Data Format: 2"s complement ( what is the advantage of 2's complement that 1's com ?).
xxxxxxxxxx1xxxxx Input Sample Size: 16 bit ( Can i use 8 bit ?) (what does it mean "ONly FOR Linear PCM in Documentation ?).
xxxxxxxxxxx010xx # of bits padding at MSB: 2 (if i use 16 Bit, 2bit's of MSB is needed for padding, coz only 14bits are enough for u-law)
xxxxxxxxxxxxxx00 Air Coding Format: CVSD
Expecting your valuable reply
Thanks
-ivy
--- Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi,
>
> > I am trying to change the input Encoding of Voice setting using hciconfig tool. Default voice setting 0x60, supports Linear pcm ( I guess i am newbie if any thing wrong please correct me) .. I would like to change setting to u-law or a-law. I have assigned voice setting value as 0x100 for u-law i am not sure, it is correct or not ?.. Could any one help me to set it correctly...
>
> check the mailing list archive, because it was explained in detail some
> time ago and of course the specification is a good information source.
>
> Regards
>
> Marcel
>
>
>
>
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next reply other threads:[~2005-09-24 10:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-24 10:20 Ivy [this message]
2005-09-24 11:03 ` [Bluez-devel] Voice setting for U-law and A-law Andreas Beck
-- strict thread matches above, loose matches on Subject: below --
2005-09-25 10:38 Ivy
2005-09-24 11:52 Ivy
2005-09-24 11:21 Ivy
2005-09-24 11:32 ` Andreas Beck
2005-09-23 14:43 Ivy
2005-09-23 14:48 ` Marcel Holtmann
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