Essays about: "pesq"

Showing result 1 - 5 of 29 essays containing the word pesq.

  1. 1. Evaluation of the Perceived Speech Quality for G729D and Opus : With Different Network Scenarios and an Implemented VoIP Application

    University essay from Linköpings universitet/Informationskodning

    Author : Louise Almér; [2022]
    Keywords : Compression; Codec; audio; speech quality; quality of experience;

    Abstract : Communication has always been a vital part of our society, and day-to-day communication is increasingly becoming more digital. VoIP (voice over IP) is used for real-time communication, and to be able to send the information over the internet must the speech be compressed to lower the number of bits needed for transmission. READ MORE

  3. 2. Homomorphic Encryption for Audio Conferencing

    University essay from Linköpings universitet/Institutionen för datavetenskap

    Author : Herman Nordin; Ebba Lindström; [2022]
    Keywords : Homomorphic encryption; VoIP; security; audio conferencing; cryptography;

    Abstract : Homomorphic encryption (HE) enables computations on encrypted data making it possible to perform calculations on a server without sharing the secret key for decryption. HE is relatively new and has seen significant improvements in recent years in terms of speed of encryption, decryption, operations, and the number of operations possible to perform in a row without damaging the ciphertext. READ MORE

  4. 3. Parametric Prediction Model for Perceived Voice Quality in Secure VoIP

    University essay from Linköpings universitet/Informationskodning

    Author : Martin Andersson; [2016]
    Keywords : VoIP; QoS; Parametric model; Encryption;

    Abstract : More and more sensitive information is communicated digitally and with thatcomes the demand for security and privacy on the services being used. An accurateQoS metric for these services are of interest both for the customer and theservice provider. READ MORE

  5. 4. Audio quality perception of SCIP encrypted voice transmission over low quality radio links

    University essay from Uppsala universitet/Signaler och System

    Author : Anton Sundin; [2016]
    Keywords : SCIP; audio quality perception; packet loss; PESQ;

    Abstract : Tactical radio communications used in military applications hasstrict requirements regarding security and has to be operable inrough environments in which there may be disturbances and disruptionson a radio link. The performance of the Secure CommunicationInteroperability Protocol (SCIP) operating in an asynchronouscommunication network with various levels of packet loss isinvestigated and found inadequate mainly due to problems withcryptographic synchronization between the transmitting and receivingunits. READ MORE

  6. 5. Quantification of audio quality loss after wireless transfer

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Frida Hedlund; Ylva Jonasson; [2015]
    Keywords : Bluetooth link; Mobile phones; Real-life testing; evaluation software; sound quality measurements; objective grading; PESQ; PEAQ; Sound quality; Technology and Engineering;

    Abstract : The report describes a quality measurement for audio, both the theoretical background and implementation. It begins by describing the unlicensed methods the implementation is based on, Segmental SNR, Frequency Weighted Segmental SNR, Log-Likelihood Ratio, Cepstral Distance and Weighted Slope Spectral distance, and the commercial methods used as reference, PEAQ and PESQ. READ MORE