Compressing Voice Sound.

Hi Win, do you mean use two BT device on clinet at the same time.... but cost ?

btw, maybe A2DP / headset is a choice on Bluetooth for voice signal, but I don't know how to deal with Video yet.

Now, I am sending raw data via SPP.

btw,

What confused me today is .... a famous Bluetooth chip - the highes PIO clock is 100us @@~~

maybe I do something wrong, still checking the problem, but the SPP delay is about 15ms @@~~

Best regards, Boki.

"W>>

ha... thank you.

Best regards, Boki.

"Pooh Bear" ???????: snipped-for-privacy@hotmail.com...

Bluetooth SPP ( Serial Port Profile )

Best regards, Boki.

"W>>

Thanks a lot, I will have a look ASAP. :)

Best regards, Boki.

"martin griffith" ???????: snipped-for-privacy@4ax.com...

Further to my previous post, I am using a *single* bluetooth module that simultaneously passes both voice and data. Data is passed on the ACL channel using the Serial port profile and audio is passed on the SCO channel. Note that for most devices, the two endpoints must be the same.

The serial port data is passed on the TxD/RxD pair (with appropriate flow control) and the audio is passed on the PCM highway. In my case, I have different implementations using companded audio in one case and linear (2s complement) 13 bit data in another.

Cheers

PeteS

PeteS wrote:

Sure, it is a long time we did that... ( manufacturing jobs move to mainland ) RD job market ... I guess is OK, but of course, not as high salary (but low tax) as oversea unless some people are really good in the world.

I can feel the presure from mainland/india especially is their software engineer...

Best regards, Boki.

???????: snipped-for-privacy@g14g2000cwa.googlegroups.com...

Take a look at Winbond's voice codecs:

or even Zarlink (http"// though they're more telecom's and not necessarily useful to you.

Cheers.

Ken

Nice shot! Thanks a lot.

Best regards, Boki.

If we're into semantics, I think it's "compelled to conjugate"

:-))

-- "Electricity is of two kinds, positive and negative. The difference is, I presume, that one comes a little more expensive, but is more durable; the other is a cheaper thing, but the moths get into it." (Stephen Leacock)

Great! : D

I will try : )

Best regards, Boki.

"PeteS" ???????: snipped-for-privacy@f14g2000cwb.googlegroups.com...