CounterPath Bria iPhone Edition 1.2 User Guide - Manual (Page 32)

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Audio Codecs Selection
Cell Audio Codecs WiFi Audio Codecs
These two screens list the audio codecs that can be used during a WiFi call or 3G call. 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 except G.722 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.
You can prioritize codecs by dragging them up or down in the list. Codecs higher in the list are given a higher
priority in the offer, when negotiating codecs with the other party. Therefore, moving a codec higher should
improve its chances of being chosen.
G.722 is a wideband codec. All other codecs are narrowband. When a wideband codec is used, data usage will
be higher and audio quality will generally be better. When a narrowband codec is used, data usage may be lower
but audio quality may be affected. Data usage for the narrowband codecs, from high to low usage, is: G.711a,
G.711u, GSM, iLBC, G.729.
G.722 is available only with specific platforms; see page 3 for information. If you do not have one of these
platforms, this codec will not appear on the list.
You can only enable this codec if
you have purchased it; see page 29.
Drag the codec up or down to change its
priority in the list. See below.