Design of the voice communication system encrypted base on TMS320VC5509

2012 ◽  
Author(s):  
Xuefeng Dong ◽  
Zhaoping Wang ◽  
Xiaoliang Li
Keyword(s):  
Communication System ◽  
Voice Communication ◽  
The Voice

scholarly journals Voice and Position Simultaneous Communication System Based on Beidou Navigation Constellation

2020 ◽  
Vol 38 (5) ◽  
pp. 1010-1017
Author(s):  
Zhen Ao ◽  
Feng Li ◽  
Qiang Ma ◽  
Guiqing He
Keyword(s):  
Communication System ◽  
Linear Prediction ◽  
Voice Conversion ◽  
Prediction Algorithm ◽  
Short Message ◽  
Navigation Systems ◽  
Analysis Program ◽  
Data Format ◽  
Voice Communication ◽  
The Voice

Considering China Beidou has unique two-way communication capability for short messages that are not available in other navigation systems such as GPS, a 600bps vocoder adapted to the short message channel of Beidou is developed. The sinusoidal excitation linear prediction algorithm is adopted by the vocoder to achieve voice communication with clear communication quality. Furthermore, a coordinate compression algorithm for processing positioning information is designed to provide more transmission space for speech encoded data. Based on the above-mentioned results, a communication system that only the Beidou navigation system is used to complete two-way secure voice and positioning simultaneous interpretation is realized. The system firstly uses a voice conversion program to convert the voice coded data obtained by the vocoder codec module into the Beidou short message data format; and then the voice code analysis program and the latitude and longitude analysis program is used to parse the voice code and location information; Finally, the experimental results of voice communication and positioning transmission are verified on the Beidou short message transceiver, and the subjective MOS test score indicates that the way is paved for the practical use of Beidou short message voice communication.

Design of Voice Communication System Based on the ZigBee Technology for Power Plant

2014 ◽  
Vol 716-717 ◽  
pp. 1230-1233
Author(s):  
Chun Wei Xue
Keyword(s):  
Power Plant ◽  
Wireless Communication ◽  
Communication Technology ◽  
Communication System ◽  
Voice Communication ◽  
Zigbee Technology ◽  
Zigbee Network ◽  
The Voice

In this paper, the overview of ZigBee technology is firstly introduced. Futhermore, in order to evaluate the feasibility of voice communication over ZigBee network, this paper takes ZigBee as a wireless communication technology to investigate wireless voice communication. The results show that the voice communication based on ZigBee technology turn out to be effective.

scholarly journals Voice Multilateration System

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3890
Author(s):  
Robert Burczyk ◽  
Krzysztof Cwalina ◽  
Malgorzata Gajewska ◽  
Jaroslaw Magiera ◽  
Piotr Rajchowski ◽  
...  
Keyword(s):  
Communication System ◽  
Complete Analysis ◽  
Practical Implementation ◽  
Proof Of Concept ◽  
Air Traffic Controller ◽  
Voice Communication ◽  
Positioning Systems ◽  
Innovative Method ◽  
The Voice ◽  
Technology Demonstrator

This paper presents an innovative method of locating airplanes, which uses only voice communication between an air traffic controller and the pilot of an aircraft. The proposed method is described in detail along with its practical implementation in the form of a technology demonstrator (proof of concept), included in the voice communication system (VCS). A complete analysis of the performance of the developed method is presented, including the results of simulation and measurement tests in real conditions. The obtained results are very optimistic and indicate that the proposed solution may constitute an alternative method of locating aircraft in emergency conditions, i.e., a backup solution in the case of failure of other positioning systems.

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

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.

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

scholarly journals Simulation and Analysis of Impact of Buffering of Voice Calls in Integrated Voice and Data Communication System

2012 ◽  
pp. 112-116
Author(s):  
V M. Chavan ◽  
M M. Kuber ◽  
R J. Mukhedkar
Keyword(s):  
Communication System ◽  
Queuing Theory ◽  
Data Communication ◽  
Service Rate ◽  
Queue Size ◽  
Markov Chain Analysis ◽  
Chain Analysis ◽  
Voice Calls ◽  
The Impact ◽  
The Voice

Queuing theory and Markov chain analysis plays vital role in analyzing real-life problems. It is applied to wired network, wireless network and mobile communication to analyze the packet traffic in packet switched network. In this simulation and analysis, integrated communication system such as voice and data is simulated with different queue size for voice calls with different arrival and service rate and its results are analyzed to study the impact of buffering of voice and data calls for the proposed integrated wired network using Queuing theory and Markov chain analysis. We also propose to optimize the system characteristics in an attempt to provide better Quality of Service (QoS) for systems with integrated voice and data calls. The proposed models have two traffic flow namely voice calls (real-time traffic like audio) and data calls (data traffic like FTP). A single channel is assigned for voice and data calls. The incoming voice and data calls are queued when the channel is busy. Voice calls are delay-sensitive therefore priority is assigned to Constant Bit Rate (CBR) traffic voice request. For such systems, it is important to analyze the impact of buffering the voice calls as well as data calls for various mean arrival rates and mean service times for voice and data call requests. The impact of buffering the voice calls with different queue size, mean arrival rates and service rate are analyzed. These results of dedicated integrated voice and data communication system can be used for simulating any type of wired network. The minimum buffer or jitter required for both the traffic is calculated using Packet Delivery Fraction (PDF).

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