scholarly journals Audio streaming over low data rate wireless system

2011 ◽  
pp. 51-55
Author(s):  
M. Radhika ◽  
Dr.K. Rama Naidu
Keyword(s):  
Embedded System ◽  
Data Communication ◽  
Data Rate ◽  
Research Field ◽  
Mesh Network ◽  
Audio Signals ◽  
Wireless System ◽  
Audio Data ◽  
Audio Communication ◽  
Real Time Application

Audio applications over wireless networks have recently emerged as a promising research field. However, the limits in terms of communication bandwidth and transmission power have withstood the design of low-power embedded nodes for audio communication. In this work we describe the implementation details of an embedded system for the wireless broadcasting of audio signals over the low data rate wireless system. Here the audio data transferred through a wireless network instead of alarms. That is it tells how to go and where the disaster occurs. This is a challenging task because the effective data rate available in mesh network is low. Most of the bandwidth is consumed by alarm/data communication and audio steering is a real time application. Because of this low data rate we use Huffman compression and decompression algorithms to compress and decompress the audio data.

Research on Mechanical Industry with the Patrol Robot Study Based on the Embedded System

2013 ◽  
Vol 675 ◽  
pp. 82-85
Author(s):  
Wei Li
Keyword(s):  
Embedded System ◽  
Tracking System ◽  
Robot Motion ◽  
Visual Servo ◽  
Video Images ◽  
Drive Motor ◽  
Audio Data ◽  
Servo Tracking ◽  
The Embedded System ◽  
Robot Body

It is a hot topic that comprehensive machine vision and embedded systems for mechanical industry robot motion control now. In this paper, an embedded robot visual servo tracking system platform was build, which can process and analyze video images and audio data, then analysis results was transfered to the drive motor in the robot body, and realized the autonomy tracing of the mechanical robot .

Priority Scheduling Algorithm for Traffic in a LTE-based Defence Mesh Network Incorporating Centralised Scheduling Architecture

2017 ◽  
Vol 67 (5) ◽  
pp. 581
Author(s):  
Sidharth Shukla ◽  
Vimal Bhatia
Keyword(s):  
Packet Loss ◽  
Mesh Networks ◽  
Scheduling Algorithm ◽  
Data Rate ◽  
Mesh Network ◽  
High Data Rate ◽  
Priority Scheduling ◽  
High Data ◽  
Wireless Mesh

<p>Wireless mesh networks (WMN) are the networks of future and can operate on multiple protocols ranging from WiFi, WiMax to long term evolution (LTE). As a recent trend defence networks are incorporating off-the-shelf, state of the art commercial protocols to enhance the capability of their networks. LTE is one such commercially available protocol which is easy to deploy and provide high data rate which can be ideally implemented in WMN for defence networks. To enable these high data rate services LTE-based defence mesh networks (DMN) are the requirement of the day and future. However, LTE-based DMN are prone to congestion at times of active operations or full-fledged war. The congestion scenarios may lead to LTE packet loss. Hence, it is pertinent that these networks amalgamate information grooming algorithms to alleviate the throughput of the network in peak hour conditions. An efficient priority scheduling algorithm based on class of service prioritisation, data rate consumption and location of origin of traffic in the DMN is proposed. The simulations demonstrate that by incorporating the proposed priority scheduling algorithm, the overall packet loss of priority packets in the DMN reduces substantially.</p>

Infrared wireless system for local area network and data communication

2003 ◽  
Author(s):  
M.J. Betancor ◽  
A. Santamaria ◽  
F.J. Gabiola ◽  
A. Polo ◽  
J. Martin-Bernardo ◽  
...  
Keyword(s):  
Local Area Network ◽  
Data Communication ◽  
Local Area ◽  
Area Network ◽  
Wireless System

scholarly journals Digital Watermarking of Audio Signals for Robust Hidden Audio Communication via Air Audio Channel

2017 ◽  
Vol 6 (55) ◽  
pp. 185
Author(s):  
Maksim Viktorovich Gofman ◽  
Anatoliy Adamovich Kornienko ◽  
Evgenij Timofeevich Mironchikov ◽  
Aleksandr Borisovich Nikitin
Keyword(s):  
Digital Watermarking ◽  
Audio Signals ◽  
Audio Channel ◽  
Audio Communication

scholarly journals Audio and Video Decoding and Synchronous Playback for Embedded Systems

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Zhitao Li
Keyword(s):  
Embedded System ◽  
Video Data ◽  
Video Frame ◽  
Test Results ◽  
Video Playback ◽  
Video Decoding ◽  
Arm Processor ◽  
Audio Data ◽  
Hardware Processing ◽  
Arm Embedded System

The audio and video decoding and synchronization playback system ofMPEG-2 TS stream is designed and implemented based on ARM embedded system. In this system, hardware processor is embedded in the ARM processor. In order to make full use of this resource, hardware MFC is adopted. The multi-format codec decoder decodes the video data and decodes the audio data using the open source Mad (libmad) library. The V4L2 (Video for Linux2) driver interface and the ALSA (advanced Linux sound architecture) library are used to implement the video. Because the video frame playback period and the hardware processing delay are inconsistent, the system has a time difference between the audio and video data operations, which causes the audio and video playback to be out of sync. Therefore, we use the method of synchronizing the video playback implemented to the audio playback stream; realize the audio and video are playing sync. Test results show that, the designed audio decodes and synchronization playback system can decode and synchronize audio and video data.

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