Image signal processing unit and method of processing image signal
First Claim
1. An image signal processing unit comprising:
- a frame rate conversion circuit converting a frame rate of an input image signal from a first frame frequency to a second frame frequency which is twice the first frame frequency, and selecting whether a motion correction process is performed or not at the time of the frame rate conversion, wherein,in a case of performing frame rate conversion with the motion correction process, a motion vector is determined between a first frame image and a third frame image in the input image signal, followed by forming three interpolation frame images through performing the motion correction process to the first frame image based on the motion vector, and then the three interpolation frame images are inserted between the first frame image and the third frame image so as to establish the second frame frequency, andin a case of performing frame rate conversion without the motion correction process, an interpolation frame image having the same content as the first frame image is formed and inserted between the first frame image and a second frame image in the input image signal, and an interpolation frame image having the same content as the second frame image is formed and inserted between the second frame image and the third frame image.
2 Assignments
0 Petitions
Accused Products
Abstract
An image signal processing unit includes a frame rate conversion circuit performing double frame rate conversion on an input image signal from a first frame frequency to a second frame frequency. When performing frame rate conversion with the motion correction process, a motion vector is determined between a first frame image and a third frame image, and three interpolation frame images are formed through the motion correction process to the first frame image based on the motion vector, and are inserted between the first and third frame images so as to establish the second frame frequency. When performing frame rate conversion without the motion correction process, an interpolation frame image same as the first frame image is inserted between the first and second frame images, and an interpolation frame image same as the second frame image is inserted between the second and third frame images.
-
Citations
5 Claims
-
1. An image signal processing unit comprising:
-
a frame rate conversion circuit converting a frame rate of an input image signal from a first frame frequency to a second frame frequency which is twice the first frame frequency, and selecting whether a motion correction process is performed or not at the time of the frame rate conversion, wherein, in a case of performing frame rate conversion with the motion correction process, a motion vector is determined between a first frame image and a third frame image in the input image signal, followed by forming three interpolation frame images through performing the motion correction process to the first frame image based on the motion vector, and then the three interpolation frame images are inserted between the first frame image and the third frame image so as to establish the second frame frequency, and in a case of performing frame rate conversion without the motion correction process, an interpolation frame image having the same content as the first frame image is formed and inserted between the first frame image and a second frame image in the input image signal, and an interpolation frame image having the same content as the second frame image is formed and inserted between the second frame image and the third frame image. - View Dependent Claims (2, 3, 4)
-
-
5. A method of processing an image signal comprising:
-
a step of converting a frame rate of an input image signal from a first frame frequency to a second frame frequency which is twice the first frame frequency; and selecting whether a motion correction process is performed or not at the time of the frame rate conversion, in the step of converting the frame rate, wherein, in a case of performing frame rate conversion with the motion correction process, a motion vector is determined between a first frame image and a third frame image in the input image signal, followed by forming three interpolation frame images through performing the motion correction process to the first frame image based on the motion vector, and then the three interpolation frame images are inserted between the first frame image and the third frame image so as to establish the second frame frequency, and in a case of performing frame rate conversion without the motion correction process, an interpolation frame image having the same content as the first frame image is formed and inserted between the first frame image and a second frame image in the input image signal, and an interpolation frame image having the same content as the second frame image is formed and inserted between the second frame image and the third frame image.
-
Specification