Analysis of the tradeoff between compression ratio and security level in real-time voice communication

2015 ◽  
Author(s):  
Abdallah Attie ◽  
Ahmad Fadlallah ◽  
Mohamad Raad
Keyword(s):  
Real Time ◽  
Compression Ratio ◽  
Security Level ◽  
Voice Communication

Research on Security Level Assessment Technology in Embedded Real-Time System

2014 ◽  
Vol 696 ◽  
pp. 266-270
Author(s):  
Hong Li Chen
Keyword(s):  
Real Time ◽  
System Security ◽  
Assessment System ◽  
Security Level ◽  
Time System ◽  
Real Time System ◽  
Testing Environment ◽  
Simulation Testing ◽  
Time Systems ◽  
The Impact

This paper briefly describes the main ideas and implementation of technology strategy of Embedded real-time system security level assessment which is important part of mechanism to system flexibility based on embedded real-time system, designs the embedded real-time system security level assessment system based on pattern matching for the characteristics of embedded real-time systems. By building security level assessment system and simulation testing environment based on RT-Linux real-time operating system, the impact of Embedded real-time system security level assessment strategy on performance of RT-Linux was tested.

ON THE COMPRESSION OF IMAGE BASED RENDERING SCENE: A COMPARISON AMONG BLOCK, REFERENCE AND WAVELET CODERS

2001 ◽  
Vol 01 (01) ◽  
pp. 45-61 ◽  
Author(s):  
JIN LI ◽  
HEUNG-YEUNG SHUM ◽  
YA-QIN ZHANG
Keyword(s):  
Real Time ◽  
Compression Ratio ◽  
Computation Complexity ◽  
Compression Efficiency ◽  
Compression Algorithms ◽  
Image Based Rendering ◽  
Huge Data ◽  
3D Scene ◽  
Good Compression

In image based rendering (IBR), a 3D scene is recorded through a set of photos which is then rendered to form novel views. Compression is essential to reduce the huge data amount of IBR. In this paper, we examine three categories of IBR compression algorithms: the block coder, the reference coder and the wavelet coder. We examine both the compression efficiency and the capability to render the compressed IBR bitstream in real-time. It is observed that the block coder consumes the least computation resource, however, its compression ratio is low. The reference coder achieves good compression ratio with reasonable computation complexity. The wavelet coder achieves the best compression ratio.

Real-time interactive voice communication - For a mute person in Sinhala (RTIVC)

2013 ◽  
Author(s):  
M.S. Amarasekara ◽  
K.M.N.S. Bandara ◽  
B.V.A.I. Vithana ◽  
D.H. De Silva ◽  
A. Jayakody
Keyword(s):  
Real Time ◽  
Voice Communication

On the Application of DSP Technology in Real-Time Voice Communication System

2010 ◽  
Vol 159 ◽  
pp. 727-732
Author(s):  
Wen Ge Feng
Keyword(s):  
Signal Processing ◽  
Real Time ◽  
Software Design ◽  
Interface Design ◽  
Design Principle ◽  
Signal Acquisition ◽  
Voice Communication ◽  
Voice Signal ◽  
Signal Acquisition And Processing ◽  
The Voice

This paper describes the advantages of DSP TMS320VC5402 in the voice coding communication and focuses on interface design of real-time voice signal processing as well as the hardware and software design of the system from the aspect of voice signal acquisition and processing. Besides, it also introduces the corresponding design principle of hardware and software.

An Improved Algorithm of Adaptive Multi-Pulse AMR-WB PLC

2013 ◽  
Vol 321-324 ◽  
pp. 2754-2759
Author(s):  
Jun Ying Jia ◽  
Hu Lin ◽  
Jian Wei Sun
Keyword(s):  
Real Time ◽  
Packet Loss ◽  
Mobile Terminal ◽  
Decoding Algorithm ◽  
Basic Principles ◽  
Voice Communication ◽  
Speed Up ◽  
Small Bandwidth ◽  
Adaptive Codebook

Packet loss is common in internet, when use IMS mobile terminal accessed by wireless to do real-time voice communication, the quality of speech is affected a lot. This text summarizes the basic principles of AMR-WB encoding and decoding algorithm and main technology of PLC. Based on AMR-WB encoding and decoding algorithm, it improves an algorithm of multi-plus PLC. The algorithm described in this text can speed up the recovery of adaptive-codebook by small bandwidth cost and effectively prevent the spread of errors, improve the quality of speech.

scholarly journals A-LNT: A Wireless Sensor Network Platform for Low-Power Real-Time Voice Communications

2014 ◽  
Vol 2014 ◽  
pp. 1-19 ◽  
Author(s):  
Yong Fu ◽  
Qiang Guo ◽  
Changying Chen
Keyword(s):  
Wireless Sensor Network ◽  
Low Power ◽  
Real Time ◽  
Sensor Network ◽  
Power Management ◽  
Protocol Design ◽  
Wireless Sensor ◽  
Voice Communication ◽  
Voice Communications ◽  
Network Platform

Combining wireless sensor networks and voice communication for multidata hybrid wireless network suggests possible applications in numerous fields. However, voice communication and sensor data transmissions have significant differences, Meanwhile, high-speed massive real-time voice data processing poses challenges for hardware design, protocol design, and especially power management. In this paper, we present a wireless audio sensor network platform A-LNT and study and discuss key elements for systematic design and implementation: node hardware design, low-power voice codec and processing, wireless network topology, hybrid MAC protocol design based on superframe, radio channel allocation, and clock synchronization. Furthermore, we discuss energy management methods such as address filtering and efficient power management in detail. The experimental and simulation results show that A-LNT is a lightweight, low-power, low-speed, and high-performance wireless sensor network platform for multichannel real-time voice communications.

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