Browse Prior Art Database

Utilization of Motion Detection Information for System Resource Management in a Multi-media Environment

IP.com Disclosure Number: IPCOM000107731D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 3 page(s) / 146K

Publishing Venue

IBM

Related People

Fleischman, RM: AUTHOR [+3]

Abstract

Described is a method of utilizing motion detection information for system resource management in a multi-media environment. The method obtains the motion detection information by digitally comparing field- by-field changes in video devices.

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Utilization of Motion Detection Information for System Resource Management in a Multi-media Environment

       Described is a method of utilizing motion detection
information for system resource management in a multi-media
environment.  The method obtains the motion detection information by
digitally comparing field- by-field changes in video devices.

      Multi-media computer systems are utilized to determine when
shared system resources can be switched to other non-motion sources.
The method of resource sharing reduces the amount of logic and memory
while giving the system the illusion of having dedicated system
resources for each video and graphics feed.  Multi-media systems
combine text, graphics, image, video and sound by combining the video
feeds along with existing computer media.  The video feeds require
dedicated system resources to process information due to the
continuous duty cycle of the video information.  In contrast,
traditional graphics and text data can be manipulated through
software.

      Typically, television transmission of video signals contains
sequences of still pictures occurring at a rate suitable for the
cathode ray tube (CRT) refresh to occur at an acceptable flicker.
The contents of the picture sequence may not always have pictures
that change.  However, pictures that change within a sequence create
the appearance of motion when displayed properly; the other pictures
are stills.  The stills of a video signal are redundant information
and are transmitted for the purposes of motion timing and display
refresh timing.  This is done to reduce the complexity of television
receivers.

      The video subsystem of a multi-media workstation can be modeled
as a multiple video unit feeding multiple displays after being routed
through various video processing units. The processing units are a
limited resource of such a system.  Therefore, to conserve their use,
the concept described herein signals the presence of redundant
information in order to release a processing unit to operate other
tasks.  This action conserves system bandwidth and limits the
resource allocation time that would be required for a video feed.
The result is an efficient scheduling of system resources through
motion information associated with each video feed.

      Figs. 1 and 2 exemplify the concept.  Video feeds are on the
left side, system resources are in the middle, and a frame store with
a display is shown at the right of each figure.  Fig. 1 depicts a
system without motion-dependent resource scheduling, and Fig. 2
depicts a system with motion-dependent resource scheduling.  For ease
of understanding, consider both systems depicted to contain various
modeling para...