[Bluez-devel] Question about cvsd input and output
From: Jui-Hao Chiang <hidden>
Date: 2008-08-17 21:53:16
Hi, all I have looked all the old articles, but still have a question. In the Bluetooth spec, it said the CVSD input shall be 64ksample/s and 16-bit linear PCM. It also says the output of the CVSD decoder are 16-bit linear PCM digital samples, at a sampling frequency of 8 ksample/sec. I am a little confused about the data rate of the input side (64k*16bit = 1024kbps), which seems 8 times faster than the output of decoder. Besides, I tried to open a SCO socket between two adapters (scotest), and the maximum data rate in one direction is 128kbps. Thus, I don't think we can actually feed 64ksamples/sec, 16-bit voice data into the CVSD codec of the adapter. Am I right? or it's just the limitation of my adapter (Cyber Blue, Bluetooth EDR USB dongles,class II,V2.0)? Bests ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel