Re: [Bluez-users] audio transmission

Re: [Bluez-users] audio transmission

[JW]

Hi,

On Dec 11, 2003, at 5:44 PM, Marcel Holtmann wrote:

> Hi,
>
>> I've been experimenting with sending audio over Bluetooth.
>> SCO is working nicely right now, but I am also interested
>> in higher quality audio. Would it be possible to achieve higher
>> quality by using multiple SCO channels, and if so, how do
>> you do this? (And even if it's not possible, how do you access
>> the second and third SCO channels?)
>
> only the eSCO from Bluetooth 1.2 can achieve higher quality.
>

Google tells me that we won't be seeing products based on 1.2 until
Q2 2004 or so - or is there already something available?

Also, how much work will bluez need to utilize new 1.2 features?

Thanks

Re: [Bluez-users] audio transmission

[Marcel Holtmann]

Hi,

> Google tells me that we won't be seeing products based on 1.2 until
> Q2 2004 or so - or is there already something available?

actually I know of two usable development kits based on 1.2, but don't
ask me about any further details ;)

> Also, how much work will bluez need to utilize new 1.2 features?

The parts for the Bluetooth 1.2 HCI layer are almost finished. The
needed kernel patches are on its way and the new Bluetooth library got
full support of all Bluetooth 1.2 HCI commands and events. The eSCO part
is more difficult and I don't have access to any hardware for testing. I
don't expect eSCO support very soon, but once we start with it, it will
result in a complete new framework for SCO and eSCO.

But the most important part is the new flow and error control for the
L2CAP layer, which can also be used over a Bluetooth 1.1 HCI link and it
will give us a SOCK_STREAM on the L2CAP level. At the moment I don't
know of anyone who is working on it and this is not good :(

Regards

Marcel




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