CounterPath Bria Android Edition 1.1 User Guide (Revision 7) - Manual (Page 35)

Bria Android Edition User Guide
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Audio Codecs Selection
Codecs are programs in Bria involved in transmitting audio; each codec has different characteristics and
therefore each works better in some situations than in others.
Novice and Non-technical Users
We recommend you enable all codecs and let Bria select the best codec to use in a given situation.
Technically Savvy Users
You may choose to enable one, some or all codecs. If only one codec is enabled, all calls will be made with that
codec. If more than one is enabled, Bria negotiates the codec to use (from among the enabled codecs) with the
other person. If no codecs are enabled, Bria uses G.711.
G.722 is a wideband codec. All other codecs are narrowband. Data usage for the narrowband codecs, from high
to low usage, is: G.711, GSM, iLBC, G.729.
When G.711 is used, data usage will be higher and audio quality will generally be better. When the lower
bandwidth codecs are used, data usage may be lower but audio quality may be affected. The optional G.729
codec will provide you the best performance (audio quality and bandwidth usage/cost) when using cellular (3G)
for phone calls.
If you turn on the Higher Priority field, then when a narrowband codec is available, it will be given a higher
priority in the media negotiation with the other person, which may result in that codec being used. If you leave
this field off, a narrowband codec will not be given a higher priority in the negotiation.