Procedure for IVAS bandwidth computation
The document identifies an inconsistency in the bandwidth computation procedure for the IVAS codec specified in clause Z.2 compared to the general session setup procedures defined in clause 6.2.7.2 of TS 26.114. Specifically, the IVAS-specific procedure includes RTCP bandwidth in the b=AS (Application-Specific maximum bandwidth) calculation, while other codecs and general procedures do not.
The CR proposes a correction to clause Z.2 "Procedure for computing the bandwidth" to align the IVAS codec bandwidth calculation with existing procedures for other codecs.
The updated procedure for computing b=AS when no extra bandwidth is allocated for redundancy:
Key Change: Step 5 (adding RTCP bandwidth) has been removed from the calculation procedure, and the subsequent step has been renumbered from 6 to 5.
The CR ensures consistency across TS 26.114 by removing the RTCP bandwidth component from the IVAS-specific b=AS calculation, aligning it with the treatment of other codecs in the specification. This eliminates ambiguity in bandwidth modifier handling for IVAS codec implementations.