Motivation

During this study period, Q.3/12 finished the revision of existing Recommendations. Recommendation P.313 now includes transmission characteristics for mobile headset and hands-free terminals, in addition to transmission characteristics for mobile and cordless handsets.

Voice terminals directly interfacing with packet-switched networks (VoIP) have additional considerations, including packet loss and delay. A new recommendation for VoIP terminals has been the focus of Question 2/12 (P.1010).

Due to the needs for super-wideband and full-band application, Question 3/12 should research the transmission characteristics of super-wideband and full-band terminals and relevant measurement methodology.

The work defined in this Question remains an important area for international telecommunication standardization due to the increase use and design variations of handset, headset, and hands-free terminals for use on mobile and IP networks. Furthermore, speech characteristics for new terminals (super-wideband and full band terminals) will fall under this Question.

The following major Recommendations/Supplements fall under its responsibility:

P.300, P.310, P.311, P.313, P.341, P.342, P.350, P.370, P.Sup10, P.Sup16, G.136.

Question

Study items to be considered include, but are not limited to:

• What enhancement or new Recommendation needs to be developed to defined headset and handsfree transmission characteristics for mobile and cordless terminals?
• What enhancements to existing Recommendations need to specify the performances of noise reduction and other acoustic enhancement devices within terminals?
• What enhancements to existing Recommendations are needed to specify the performance of mixed operation between Narrow band and Wide band terminals in teleconferencing situations?
• What transmission characteristics and measurement methods are needed for cordless and mobile terminals using Multi Rate Codecs for Narrow band and Wide band applications?
• What speech transmission characteristics are needed for multimedia terminals?
• What kind of simple alignment methodology for PC VoIP using different coders is needed?
• What new test methods and signals, such as ones defined in P.501 and P.502, are appropriate for testing transmission characteristics of terminal equipment?
• What speech transmission characteristics are needed for VoIP terminals?
• What are the characteristics and the test methods for terminals implementing Super Wide-Band and full band?
• How can VoIP terminals be tested, considering the assessment methods developed for VoIP gateways under Question 2/12?
• What speech transmission characteristics and measurement methods are needed for terminals using new access techniques (e.g., power line access, WLAN, etc.)?
• What other changes and/or improvements can be done for the existing Recommendations (P.300, P.310, P.311, P.313, P.340, P.341, P.342, P.350, P.370)?

Tasks

The main task of this Question in next study period shall focus on the following:

• Contribution to enhancement of ITU-T Recommendation G.172.
• Revisions of ITU-T Recommendations of wide band terminals (P.311 and P.341) to update LR requirements.
• New recommendation on super wideband and full band terminals.
• Contribution to new Recommendation P.VoIP-MM.

And the following tasks shall also be considered:

• Contribution to the enhancement of ITU-T Recommendation P.1010.
• Revision of ITU-T Recommendation P.313 to include speech transmission characteristics for wideband mobile and cordless terminals.
• Contributions to the existing Recommendation P.501 and P.502.
• Contribution to enhancement of ITU-T Recommendations P.310, P.342 and G.136.
• Considering on how to help measure and mitigate climate change.

An up-to-date status of work under this Question is contained in the e SG 12 Work Programme http://www.itu.int/ITU-T/workprog/wp_search.aspx?isn_sp=545&isn_sg=551

Relationships

Recommendations: P.330, P.340, P.501, P.502, P.1010, G.131
Questions: 2/12, 5/12, 6/12 and 10/12
Study Groups: ITU-T SG 15, SG 16
Standardization bodies: IEEE, VDA, TIA, 3GPP, ETSI