Changes between Version 29 and Version 30 of FAQ

Timestamp:

Feb 4, 2008 7:19:10 AM (16 years ago)

Author:

bennylp

Comment:

--

FAQ

@@ -960 +960 @@
 This problem is caused by lack of network connectivity, just like [#wm-resolve PJ_ERESOLVE error on Windows Mobile] above. PJSIP (and SIP programs in general) does not work with HTTP proxy, so even if networking seems to be working with Internet Explorer with proxy configured, SIP messages won't be able to reach the destination unless networking is properly configured. Please see [#wm-resolve PJ_ERESOLVE error on Windows Mobile] topic above on how to configure networking on Windows Mobile/PocketPC emulator.
 
+=== Bad audio quality on Windows Mobile === #wm-bad-audio
+
+[http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-January/001534.html Tzury Bar Yochay posted this] on PJSIP mailing list:
+
+ ''"Within a layout of Asterisk as server, a soft-phone on a desktop workstation (SJPhone), and pjsua_wince on WM5 device I am experiencing the following symptom: Voice spoken at the desktop end is heard well in the mobile device, but not the vice versa. e.g., words spoken on the mobile device yields a metallic effect in the PC Speaker."''
+
+The solution is to increase the sound buffer count to accommodate audio frame burstiness on Windows mobile, by declaring this on your {{{config_site.h}}}:
+
+{{{
+  #define PJMEDIA_SOUND_BUFFER_COUNT  16
+}}}
+
+Increasing sound buffer count will increase audio latency, so please do some experiments to get the lowest value to get the best latency without breaking the audio quality.
+
+
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