Method and apparatus for scaling up and down a video image
AssigneeSeiko Epson Corporation
InventorTakeuchi Kesatoshi
Life of this patent
Estimating the term…
Abstract
An input video image having an arbitrary resolution is converted to another video image having a predetermined resolution of a display device to display the video image with the converted resolution. The frequencies of the synchronizing signals of the input video signal are measured, and then a resolution of an input video signal is determined from the measured frequencies of the synchronizing signals. The video image represented by the input video signal is expanded or contracted, so as to make the resolution of the input video signal coincident with a resolution of the display device. A resulting video image with the converted resolution is displayed on the display device.
Claims24
A video image scaling apparatus for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said apparatus comprising:
- frequency determination means for analyzing the video signal to determine a frequency of synchronizing signals when the video signal is output in the first format;
- image size determination means for determining an image size of the video signal by analyzing the frequency of the synchronizing signals of the video signal output in the first format;
- and
- scaling means for scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
A method for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said method comprising the steps of:
- (a) analyzing the video signal to determine a frequency of synchronizing signals when the video signal is output in the first format;
- (b) determining an image size of the video signal by analyzing the frequency of the synchronizing signals of the video signal output in the first format;
- and
- (c) scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
A video image scaling apparatus for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said apparatus comprising:
- a video signal input for receiving a video signal, in the first format, including synchronizing signals;
- a synchronizing signal frequency analyzer receiving the video signal from the video signal input and determining a frequency of the synchronizing signals when the video signal is output in the first format;
- an image size determination unit for determining an image size of the video signal by analyzing the frequency of the synchronizing signals being applied to the video signal input;
- and
- a scaling unit for scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
A video image scaling apparatus for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said apparatus comprising:
- frequency determination means for analyzing the video signal to determine a frequency of synchronizing signals when the video signal is output in the first format;
- image size determination means for determining an image size of the video signal by analyzing the frequency of the synchronizing signals of the video signal output in the first format;
- and
- scaling means for scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
A method for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said method comprising the steps of:
- (a) analyzing the video signal to determine a frequency of synchronizing signals when the video signal is output in the first format;
- (b) determining an image size of the video signal by analyzing the frequency of the synchronizing signals of the video signal output in the first format;
- and
- (c) scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
A video image scaling apparatus for receiving a video image output as a video signal in a first format for a first display device and outputting the video image in a second format for a second display device, said apparatus comprising:
- a video signal input for receiving a video signal, in the first format, including synchronizing signals;
- a synchronizing signal frequency analyzer receiving the video signal in the first format from the video signal input and determining a frequency of the synchronizing signals when the video signal is output in the first format;
- an image size determination unit for determining an image size of the video signal by analyzing the frequency of the synchronizing signals being applied to the video signal input;
- and
- a scaling unit for scaling the video image expressed by the video signal in the first format by utilizing the synchronizing signals and the determined image size so that the video signal is output in the second format of said second display device.
Dependencies are inferred from the claim text.