Sökning: "Audio over IP"

Visar resultat 1 - 5 av 20 uppsatser innehållade orden Audio over IP.

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

   Master-uppsats, Linköpings universitet/Informationskodning

   Författare :Louise Almér; [2022]
   Nyckelord :Compression; Codec; audio; speech quality; quality of experience;

   Sammanfattning : 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. LÄS MER

3. 2. Homomorphic Encryption for Audio Conferencing

   Master-uppsats, Linköpings universitet/Institutionen för datavetenskap

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

   Sammanfattning : 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. LÄS MER

4. 3. Audio-based Motion Detection

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Gopal Gomatam; Filip Dujmic; [2021]
   Nyckelord :sonar; motion detection; audio frequencies; audio processing; Technology and Engineering;

   Sammanfattning : Motion detection is an essential technology and it has numerous use-cases, such as security tracking, automated door opening systems, and IP cameras. Commonly, passive infrared sensors or radio frequency sensors are used for motion detection. However, this thesis focuses on performing motion detection using existing hardware at audio frequencies. LÄS MER

5. 4. Analyzing VoIP connectivity and performance issues

   Kandidat-uppsats,

   Författare :Mehenni Sadaoui; [2019]
   Nyckelord :VoIP; connectivity and performance issues; call quality; packet traces.;

   Sammanfattning : The appearance of Voice over IP (VoIP) revolutionized the telecommunications word, this technology delivers voice communications over the internet protocol (IP) networks instead of the public switched telephone network (PSTN), calls can be made between two VoIP phones as well as between a VoIP phone and an analog phone connected to a VoIP adapter [1]. The use of this technology gives access to more communication options compared to the conventional telephony but the users face different problems, mostly connectivity and performance issues related to different factors such as latency and jitter [2], these factors affect directly the call quality and can result in choppy voice, echoes, or even in a call failure. LÄS MER

7. 5. How does asymmetric latency in a closed network affect audio signals and strategies for dealing with asymmetric latency

   Kandidat-uppsats, Luleå tekniska universitet/Medier ljudteknik och upplevelseproduktion och teater

   Författare :Fredrik Lundberg; [2018]
   Nyckelord :Audio over IP; Latency; Closed network; Affect on audio signals;

   Sammanfattning : This study investigates Audio over IP. A stress test was used to see what impact asymmetric latency had on the audio signal in a closed network. The study was constructed into two parts. The first part is the stress test where two AoIP solutions were tested. LÄS MER