Subjective Quality Evaluation of Underground BPL-PLC Voice Communication System

2020 ◽  
pp. 176-186
Author(s):  
Grzegorz Debita ◽  
Przemyslaw Falkowski-Gilski ◽  
Marcin Habrych ◽  
Bogdan Miedzinski ◽  
Bartosz Polnik ◽  
...  
Keyword(s):  
Communication System ◽  
Quality Evaluation ◽  
Subjective Quality ◽  
Voice Communication

Subjective Quality Evaluation of Speech Signals Transmitted via BPL-PLC Wired System

2020 ◽  
Author(s):  
Przemyslaw Falkowski-Gilski ◽  
Grzegorz Debita ◽  
Marcin Habrych ◽  
Bogdan Miedzinski ◽  
Przemyslaw Jedlikowski ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Subjective Quality ◽  
Speech Signals

Implementation Of The Innovative Radiolocalization System VCS-MLAT (Voice Communication System – Multilateration)

2020 ◽  
Author(s):  
Szymon Wiszniewski ◽  
Olga Blaszkiewicz ◽  
Alicja Olejniczak ◽  
Jaroslaw Sadowski ◽  
Jacek Stefanski
Keyword(s):  
Communication System ◽  
Voice Communication

Subjective quality evaluation of low-bit-rate video

2001 ◽  
Author(s):  
Mark Masry ◽  
Sheila S. Hemami ◽  
Wilfried M. Osberger ◽  
Ann M. Rohaly
Keyword(s):  
Quality Evaluation ◽  
Subjective Quality ◽  
Bit Rate ◽  
Low Bit Rate

PENGARUH PENGGUNAAN CODEC STANDART ITU G.729 TERHADAP SISTEM KOMUNIKASI VOIP

2021 ◽  
Vol 17 (1) ◽  
pp. 11-22
Author(s):  
Wahyu Adi Prijono
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Internet Protocol ◽  
Voice Over Internet Protocol ◽  
Data Communications ◽  
Voice Communication ◽  
Internet Telephony ◽  
Voice Signal ◽  
Ip Network ◽  
Packet Switch

Voice over Internet Protocol (VoIP) is a technology that is capable of passing voice traffic, in the form of packets through the network Internet Protocol (IP). IP network itself is a data communications network based packet-switch. The voice signal before experiencing bundled voice coding or format conversion of sound into digital form that can be passed over an IP network. Telephony, Internet telephony, or termed VoIP (Voice Over Internet Protocol.This communication system use VoIP (Voice over Internet Protocol), ie voice calls over data services (internet). This communication was developed using Android-based devices. Based on characteristics, android devices are open source, so users do not need to have a license to be able to have android-based devices. In addition, the android device that must be connected to a SIP (Session Iniation Protocol) is a data service that can be done with a paid subscription of the user of the operator using a conventional pulse. Telecommunications designed will use a hybrid system, the merger between VoIP communications with data communications GSM network. With basic calculations where Coding standards G 729, is a standard that can be used for voice communication system through data networks with rate of 8 Kbps. The implementation of the G729 codec is effect on communication systems VOIP.

scholarly journals Quality Evaluation of Speech Enhancement Algorithms for Normal and Hearing Loss Listeners

2019 ◽  
Vol 8 (12) ◽  
pp. 7-12
Keyword(s):  
Mean Square Error ◽  
Speech Enhancement ◽  
Quality Evaluation ◽  
Minimum Mean Square Error ◽  
Subjective Quality ◽  
Binary Mask ◽  
Mean Square ◽  
Regional Language ◽  
Speech Database ◽  
Ideal Binary Mask

The subjective quality test of the enhanced speech from different enhancement algorithms for listeners with normal hearing (NH) capability as well as listeners with hearing impairment (HI) is reported. The subjective quality evaluation of speech enhancement methods in the literature survey is mostly done targeting NH listeners and fewer attempts are observed to subjectively evaluate for HI listeners. The algorithms evaluated are from four different classes: spectral subtraction class(SS), statistical model based class (minimum mean square error), subspace class(PKLT) and auditory class (ideal binary mask using STFT, ideal binary mask using gammatone filterbank and ideal binary mask using gammachirp filterbank). The algorithms are evaluated using four types of real world noises recorded in Indian scenarios namely cafeteria, traffic, station and train at -5, 0, 5 and 10 dB SNRs. The evaluation is being done as per ITU-T P.835 standard in terms of three parametersspeech signal alone, background noise and overall quality. The noisy speech database developed in Indian regional language, Marathi, at four SNRs -5, 0, 5 and 10 dB is used for evaluation. Significant improvement is observed in ideal binary mask algorithm in terms of overall quality and signal distortion ratings for NH and HI listeners. The performance of minimum mean square error is also observed comparable with the ideal binary mask algorithm in some cases.

Sign in / Sign up

Export Citation Format

Share Document