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Mean opinion score (MOS) is a measure used in the domain of Quality of Experience and telecommunications engineering, representing overall quality of a stimulus or system. It is the arithmetic mean over all individual "values on a predefined scale that a subject assigns to his opinion of the performance of a system quality". [ 1 ]
The predictions of those objective measures should come as close as possible to subjective quality scores as obtained in subjective listening tests. Usually, a Mean Opinion Score (MOS) is predicted. POLQA uses real speech as a test stimulus for assessing telephony networks.
Perceptual Evaluation of Speech Quality (PESQ) is a family of standards comprising a test methodology for automated assessment of the speech quality as experienced by a user of a telephony system. It was standardized as Recommendation ITU-T P.862 [1] in 2001. PESQ is used for objective voice quality testing by phone manufacturers, network ...
Quality of service is especially important in networks where the capacity is a limited resource, for example in cellular data communication. A network or protocol that supports QoS may agree on a traffic contract with the application software and reserve capacity in the network nodes, for example during a session establishment phase. During the ...
An accounting information system (AIS) is a system of collecting, storing and processing financial and accounting data that are used by decision makers.An accounting information system is generally a computer-based method for tracking accounting activity in conjunction with information technology resources.
For example, possible results in the middle range are MOS = 3, 3-1/8, 3-1/4, 3-3/8, 3-1/2, 3-5/8, etc. where 8 opinion scores are averaged together. However, an important use of MOS listening tests is to evaluate differences in MOS, possibly small, between different audio processes such as codecs, telephone links, etc. After going to the ...
PSNR-HVS [12] is an extension of PSNR that incorporates properties of the human visual system such as contrast perception. PSNR-HVS-M improves on PSNR-HVS by additionally taking into account visual masking. [13] In a 2007 study, it delivered better approximations of human visual quality judgements than PSNR and SSIM by large margin.
MOS, minimum operating segment of a transportation system Mos, nickname of Thai singer Patiparn Patavekarn , also referred to as Mos Patiparn MoS, Motorways of the Sea , is a concept in the transport policy of the European Union