Wideband codecs such as AMR-WB or EVS are widely used in (mobile) speech communication. Evaluation of coded quality is often performed subjectively by an absolute category rating (ACR) listening test. However, the ACR test impractical for online monitoring communication networks. Perceptual evaluation (PESQ) one metrics instrumentally predicting results PESQ algorithm requires original referenc...

In anticipation of upcoming mobile telephony services with higher speech quality, a wideband (50 Hz to 7 kHz) mobile telephony derivative of TIMIT has been recorded called WTIMIT. It opens up various scientific investigations; e.g., on speech quality and intelligibility, as well as on wideband upgrades of network-side interactive voice response (IVR) systems with retrained or bandwidth-extended...

This paper proposes two rectangular ring planar monopole antennas for wideband and ultra-wideband applications. Simple planar rectangular rings are used to design the planar antennas. These rectangular rings are designed in a way to achieve the wideband operations. The operating frequency band ranges from 1.85GHz to 4.95GHz and 3.12GHz to 14.15GHz. The gain varies from 1.83 dBi to 2.89 dBi for ...

Communication is migrating towards wideband transmission (50 Hz – 7 kHz). Terminals and networks are developed in order to provide a significant step towards higher speech quality. At the same time, standardization bodies like ETSI, GCF and the DECT Forum are working on new specifications for terminals. In order to setup appropriate speech quality measurements for wideband terminals, existing w...

ABSTRACT A comprehensive wideband spectral analysis of the brightest black hole X-ray binary 4U 1543?47 during its 2021 outburst is carried out for first time using NICER, NuSTAR, and AstroSat observations by phenomenological reflection modelling. The source attains a super-Eddington peak luminosity remains in soft state, with small fraction ($\lt 3{{\ \rm per\ cent}}$) inverse-Comptonized phot...