Browse Prior Art Database

Method for Recovering from Delay in the Display of Moving Images

IP.com Disclosure Number: IPCOM000114078D
Original Publication Date: 1994-Nov-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 4 page(s) / 51K

Publishing Venue

IBM

Related People

Hirobe, K: AUTHOR [+4]

Abstract

Disclosed is a method for recovering from delay in the display of moving images.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 82% of the total text.

Method for Recovering from Delay in the Display of Moving Images

      Disclosed is a method for recovering from delay in the display
of moving images.

      An obstacle to providing multimedia capabilities for
workstations by software rather than hardware means is the
requirement for real-time support in multi-task environments.  For
example, if the display of moving images is synchronized with other
media, such as voice, and the display is delayed by a task with
higher
priority, it is necessary to recover from the delay after completion
of the task.  The disclosed method provides a way of doing so.

      Moving images are usually displayed by successively presenting
still images, as shown in Fig. 1.  In Fig. 1, the horizontal axis
shows the time, and the vertical axis shows the number of the still
image that should be displayed at the time.  Existing methods of
recovering from a delay simply skip the still images, as shown in
Fig. 2, or display them at maximum speed, as shown in Fig. 3.  The
method in Fig. 2 allows instant recovery, and the method in Fig. 3
avoids loss of information.  However, the problem is that both
methods suddenly change the display speed, with a resultant loss of
visual smoothness.

      The disclosed method provides a smooth recovery curve in order
to avoid visual roughness.  The lowest-order function to give a
smooth interpolation for the recovery curve is a cubic function, as
shown in Fig. 4.  A quadratic-linear-quadrat...