Method of and apparatus for displaying images at different rates
First Claim
1. A method of displaying an input image clip on an electronic monitor for displaying image frames during respective display frame periods at displaying frame rate the input image clip comprising a plurality of input image frames at an input frame rate, said display frame rate being greater than the input frame rate, which method comprises the steps of:
- providing each frame of said plurality of input image frames to the monitor at the input frame rate; and
displaying each input image frame on the monitor by extending each of the respective display frame periods to include at least one overscan period which so increases said respective display frame periods that the input image clip is displayed on the monitor at the input frame rate.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of and apparatus for displaying an image clip comprising a plurality of image frames on an electronic monitor includes separating each image frame from the next image frame by an overscan period. In this way image frames captured at a first frame rate can be displayed at the first frame rate on a monitor arranged normally to display images at a second frame rate, different to the first frame rate. In practice, the overscan period is created by adjusting driving circuitry for the monitor to increase the number of lines of data output to the monitor during a frame or field period whilst maintaining the line rate constant.
53 Citations
22 Claims
-
1. A method of displaying an input image clip on an electronic monitor for displaying image frames during respective display frame periods at displaying frame rate the input image clip comprising a plurality of input image frames at an input frame rate, said display frame rate being greater than the input frame rate, which method comprises the steps of:
-
providing each frame of said plurality of input image frames to the monitor at the input frame rate; and displaying each input image frame on the monitor by extending each of the respective display frame periods to include at least one overscan period which so increases said respective display frame periods that the input image clip is displayed on the monitor at the input frame rate. - View Dependent Claims (2, 3, 4, 5, 21)
-
-
6. An apparatus for displaying an input image clip, the input image clip comprising a plurality of input image frames at an input frame rate, the apparatus comprising:
-
a monitor for displaying image frames during respective display frame periods at a display frame rate greater than the input frame rate; and a controller for providing each input image frame to the monitor at the input frame rate and for causing each display frame period to include at least one overscan period which so increases the respective display frame periods that the input image clip is displayed on the monitor at the input frame rate. - View Dependent Claims (7, 8, 9, 10, 22)
-
-
11. A system for displaying an image clip having image frames captured at a first frame rate, the system comprising:
-
a linescan display, having a plurality of display scanlines, which is responsive to line synchronizing signals indicating that the end of a linescan has been reached and vertical synchronizing signals indicating that the end of a display scan has been reached, and being arranged normally to display images at a second frame rate greater than the first frame rate, a source for supplying data defining a plurality of lines of pixels representing said image frames to said display, and a control circuit for controlling the generation of said line synchronizing signals and said vertical synchronizing signals such that the number of line synchronizing signals between consecutive vertical synchronizing signals is such that the vertical synchronizing signals are generated at a reduced rate corresponding to the first frame rate in order that said image frames are displayed on said display at said first frame rate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification