AMR AMR-WB mode-set Parameter

AMR/AMR-WB codecs support 8 standard encoding modes as shown in the following table.

Frame Content      Mode Indicator      Frame Content
AMR 4.75 kbit/sec        0             AMR-WB 6.60 kbit/sec
AMR 5.15 kbit/sec        1             AMR-WB 8.85 kbit/sec
AMR 5.90 kbit/sec        2             AMR-WB 12.65 kbit/sec
AMR 6.70 kbit/sec        3             AMR-WB 14.25 kbit/sec
AMR 7.40 kbit/sec        4             AMR-WB 15.85 kbit/sec
AMR 7.95 kbit/sec        5             AMR-WB 18.25 kbit/sec
AMR 10.2 kbit/sec        6             AMR-WB 19.85 kbit/sec
AMR 12.2 kbit/sec        7             AMR-WB 23.05 kbit/sec

The optional AMR/AMR-WB mode-set parameter can be used to restrict the session mode set to a sub-set of the 8 standard modes. If a mode-set is specified, it must be honored, and frames encoded with modes not specified within the sub-set must not be sent in any RTP payload or used in codec mode requests. In the absence of a mode-set parameter, the inclusive mode-set (0,1,2,3,4,5,6,7) provides the default value.