Description
The term 'Experiments 3' is found within the context of 3GPP Technical Specification (TS) 26.077, titled 'Codec for Circuit Switched Multimedia Telephony Service; Modifications to AMR-WB'. This specification details the Adaptive Multi-Rate Wideband (AMR-WB) speech codec and its adaptations for use in the Circuit Switched (CS) multimedia telephony service in GSM and UMTS networks. The exact technical nature of 'Experiments 3' within this document is not publicly elaborated in standard descriptive texts; it is likely an internal label, identifier, or data set reference used during the codec's development, testing, or standardization process. It may refer to a specific set of test vectors, simulation parameters, or experimental results that were part of the conformance and performance evaluation for the AMR-WB codec modifications. As part of TS 26.077, it falls under the purview of the 3GPP Service and System Aspects (SA) Working Group 4 (SA4), which is responsible for codec and media handling specifications. Its inclusion across numerous releases from Rel-8 to Rel-19 suggests it is a stable reference point within the codec specification, though its functional role is confined to the documentation and testing architecture of the AMR-WB standard for circuit-switched voice services.
Purpose & Motivation
The purpose of the term 'Experiments 3' is intrinsically linked to the development and standardization of the AMR-WB codec for Circuit Switched Multimedia Telephony. AMR-WB was introduced to provide superior voice quality compared to narrowband codecs by supporting a wider audio bandwidth. During its creation and subsequent modifications, extensive testing and experimentation were necessary to ensure interoperability, quality, and efficient use of bandwidth. Terms like 'Experiments 3' serve as formal anchors within the specification to reference specific experimental data, test conditions, or algorithmic parameters that were evaluated and agreed upon by the standards body. This allows for precise technical referencing, ensuring that all implementers and testers are aligned on the exact conditions and expected outcomes for compliance. It addresses the need for rigorous, reproducible testing methodologies in telecommunications standards, moving away from ad-hoc descriptions to a structured framework where even experimental setups are formally documented.
Key Features
- Documented in 3GPP TS 26.077
- Associated with the AMR-WB codec for Circuit Switched Multimedia Telephony
- Serves as a reference identifier within the specification
- Maintained consistently from Release 8 onwards
- Part of the codec conformance and testing framework
- Managed by 3GPP SA4 working group
Evolution Across Releases
Initially introduced in TS 26.077 as part of the specifications for modifications to the AMR-WB codec for use in the Circuit Switched Multimedia Telephony service. It established a reference point, likely for experimental data or test parameters, within the formal codec standard.
Defining Specifications
| Specification | Title |
|---|---|
| TS 26.077 | 3GPP TS 26.077 |