April 26th, 1999 Wireless Multimedia Brandon McLean Doug Fawley.

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Presentation transcript:

April 26th, 1999 Wireless Multimedia Brandon McLean Doug Fawley

April 26th, 1999 Wireless Multimedia Overview of Wireless IndustryOverview of Wireless Industry Interesting Projects Interesting Projects Info-Pad Project Info-Pad Project Wireless Multimedia Lab Wireless Multimedia Lab

April 26th, 1999 Wireless Industry Advantages of Wireless Technologies Portable Provides Uninterrupted Connections Ad-hoc Networks Disadvantages Slower Transfer Rates (Currently) Radio Interference Limited Range

April 26th, 1999 Wireless Industry Applications Hospitals Patient information availability Warehouses Item location assistance Office Meetings Ad-hoc networks allow sharing of notes Off-Site Engagement Teams Quick network setup for auditing, etc.

April 26th, 1999 InfoPad Project The Goal To develop the hardware, software and mobile network support which will allow wireless access of realtime multimedia data using an inexpensive, portable terminal.

April 26th, 1999 InfoPad Project Features/Statistics Text/Graphics - X Server Resolution - 640x480x1bbp 4”LCD Audio - 8 bit uLaw, 8 KHz I/O Pen points/sec Video - 30 frames/sec 8-bit Color Uses a plug-in module Wireless KBPS up, 1 MBPS down Power Consumption - 1.5V ASICs

April 26th, 1999 InfoPad Project - How It Works

April 26th, 1999 InfoPad Project - How It Works InfoPad Project ARM processor for system control ASICs for I/O Xylinx for RF/GPIB

April 26th, 1999 InfoPad Project - How It Works InfoPad Project

April 26th, 1999 DECT Digital Enhanced Cordless Telecommunications

April 26th, 1999 D igital E nhanced C ordless T elecommunications - DECT Wireless Communication Standard Indoor / Outdoor Indoor / Outdoor residential, business and public applications residential, business and public applications not limited to telephony not limited to telephony Access System Access System Backbone independent Backbone independent Enhances network capabilities Enhances network capabilities Wireless MultiMedia Laboratory

April 26th, 1999 DECT Overview PSTN Data storage Printer Answering machine Voice/text mail machine Cordless phone Cordless phone with mail service Personal computer Fax machine Personal computer Regular telephone DECT Home- Based System DECT Base Station DECT Home- Based System

April 26th, 1999 DECT Frame Structure A Time Division Multiple Access/ Time Duplex (TDMA/TDD) scheme has been chosen for DECT, where a total of 12 users can share one carrier frequency

April 26th, 1999 DECT - Services Different Services for different applications Classes A - F

April 26th, 1999 Conclusions As the wireless industry continues to expand at an alarming rate, it brings along with it other facets of the technology community, such as multimedia. Wireless communication will be the standard for the next millenium. References Wireless MultiMedia Laboratory InfoPad Project

April 26th, 1999 Q & A 1. What is the bandwidth of DECT? The radio frequency band allocated to DECT is MHz. The entire 20 MHz need not be employed by DECT-based systems. The DECT standard uses TDMA. There are 10 frequencies of operation in the 20 MHz band, with a spacing of MHz. The bit rate is Mbps. 2. What is the A/V codec used in the InfoPad project? Audio - Audio - MSM7702 mu/A-law codec Video ---->

April 26th, 1999 Q & A Video Codec:

April 26th, 1999 Q & A Video Codec:

April 26th, 1999 Q & A Video Codec: