Codec for Enhanced Voice Services (EVS); Study on non-bit-exact conformance criteria and tools for floating-point EVS codec
The present document provides a study on the Conformance of Non Bit Exact implementation for EVS floating point standard in TS. 26.443. The study focuses on:
- To investigate the behaviour of different implementations of the floating-point reference code (TS 26.443), for example, those built with different versions / settings of various compilers and running on various floating-point architectures.
- To do the investigation using different test material, including clean speech, noisy speech, mixed/music content and taking into account interoperability aspects including floating-point - fixed-point and among various floating-point implementations.
- To identify and propose reliable conformance criteria and methodologies that would be able to reject any undesirable deviation, i.e. bad implementation.
- To develop one or more tools, in the form of scripts or executables, that could be used for determining acceptance/rejection based on the provided conformance criteria.
- To develop any potential additional test vectors that would be needed.
- To propose recommendation(s) on the suitability of the potential new non bit-exact conformance process for 3GPP services (e.g., gives carrier-grade quality).