scope:

The present document provides speech transmission performance requirements and measurement methods for handset and handsfree functions of superwideband handheld terminals, and requirements in order to optimize the end to end quality perceived by users.

Standardized superwideband coders are now available, some being also compatible with wideband coders.

The present document considers only conversational services (that may be mixed with other services) and does not cover the streaming-only services. Such applications include:

• Speech communication for handset and handsfree functions. Special care is taken to ensure that the quality offered both by handset and handsfree functions is equivalent and that the quality in send direction is similar to superwideband terminals fulfilling TS 102 924 [17] or TS 102 925 [24].

• Bandwidth extension which may allow usage for some mixed content applications. The frame of these applications is in the context of the mix found in ES 202 396-1 [10].

NOTE: Requirements and measurement methods for the headset function associated to handheld terminals can be found in TS 102 924 [17].