DS TR 103 503 V1.1.1:2018

Speech and multimedia Transmission Quality (STQ); Procedures for Multimedia Transmission Quality Testing with Parallel Task including Subjective Testing

Scope

The present document describes the methods for assessment of subjective audio (including speech) quality and speech
intelligibility under parallel task condition. This approach can be used to evaluate the perceived listening quality or
speech intelligibility in situations which better mimics real operation of the tested telecommunication equipment or
algorithm.
The present document describes possible parallel task generation and scenarios, the test design and reference conditions
used to evaluate the quality or intelligibility subjectively.
Several parallel task scenarios are covered:
• Physically oriented.
• Mentally oriented.
• Hybrid.