Synchronous image-switching device and method thereof
OwnerChung-Li Sheninventor
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Abstract
A synchronous image-switching device and switching method thereof are provided. The synchronous image-switching device comprises an image filter for generating target image data according to the frequency of a first clocking signal, a buffer for holding the target image and an image output control device for outputting the target image according to the frequency of a second clocking signal. Because the synchronous switching device of the present invention allows the clocking frequency of the source image to be different from that of the target image, images can be switched synchronously and power consumption of the switching operation can be reduced.
Claims10
A synchronous image-switching device for converting a raw image having a first resolution and a first picture display rate into a target image having a second resolution and a second picture display rate, the device comprising:
- an image filter, operating according to a frequency of a first clocking signal, wherein the image filter receives the raw image and generates the target image according to the raw image;
- a buffer, for holding the target image;
- and
- an image output control device, for controlling the buffer to output the target image according to a frequency of a second clocking signal,
- wherein the image filter synchronously outputs a plurality of pixels to the buffer at least once when an amount of the raw image pixels displayed per unit time is smaller than that of the target image pixels displayed image per unit time.
A synchronous image-switching method for converting a raw image having a first resolution and a first picture display rate into a target image having a second resolution and a second picture display rate, the method comprising the steps of:
- retrieving the raw image using a frequency of a first clocking signal;
- generating a pixel of the target image based on a pixel of the raw image according to the frequency of the first clocking signal;
- transmitting the pixel of the target image to a buffer according to the frequency of the first clocking signal;
- and
- outputting the pixel of the target image from the buffer according to the frequency of a second clocking signal,
- wherein the image filter outputs another pixel to the buffer in synchronization with the pixel sent to the buffer at least once when the amount of the raw image pixels displayed per unit time is smaller than that of the target image pixels displayed per unit time.
Dependencies are inferred from the claim text.