The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Design and development of four to sixteen channel video multiplexers
Author:	Rahimi, Ronan
View Online:	njit-etd1996-079 (xi, 78 pages ~ 2.8 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Sohn, Kenneth (Committee chair) Niver, Edip (Committee member) Reisman, Stanley S. (Committee member)
Date:	1996-01
Keywords:	Multiplexing. Video recordings. Video multiplexers.
Availability:	Unrestricted
Abstract:	Video multiplexer series were successfully designed and built for prototype and evaluation both in terms of hardware and software. The hardware platform was designed to accommodate up to sixteen color video input channels for time lapse or real time recording on a single video cassette recorder. This product implements four modes of operation; Live, Record, Playback and Menu mode, which is not a full mode of operation. Menu mode is a series of on-screen programming menus which appears on Live, Record and Playback modes. Menu mode enables the user to program the machine to work under specific modes of application. For Video encoding a new video-capture processor, called Bt819 made by BrookTree, was chosen to minimize the cost and system overhead of adding video input and capture to PC video/graphics systems. This development by BrookTree employs the firm's time-tested digital Ultralock technology to generate the required number of pixels per line using fixed frequency clock. On-chip pixel buffering and image scaling are provided for our QUAD picture on a monitor. Inter-integrated circuit (I2C) communication was chosen to talk to this chip directly. The video syncs were generated from PIC microcontroller using assembly language. This program was designed at 13.5 Mhz (74 nsec) clock rate which follows NTSC CCIR-601 digital video standards. Alarm package design idea came from understanding of link-list programming and was tested on four separate video signals.