Frame interpolator, frame interpolation method and motion credibility evaluator
A reliable and frame interpolation technology, applied in interpolation processing conversion, standard conversion, TV, etc., can solve problems such as signal noise distribution, small holes, and block effects
Inactive Publication Date: 2007-05-30
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology
As mentioned above, although many frame interpolation methods using motion estimation and compensation have been developed and proposed, sometimes incorrect motion vectors may be estimated due to the noise distribution of the signal, pinhole problems, etc.
[0006] Also, since blocks arranged at the same position in the current frame and the interpolated frame have different motion vectors due to a time difference, blocking artifacts may occur
If the motion vector estimated in the current frame is directly used as the motion vector of the corresponding interpolated frame, blockiness will result
Method used
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[0102] Referring now to the detailed description of the exemplary embodiments of the present invention, examples of its implementation are illustrated in the accompanying drawings. The exemplary embodiments are described below by referring to the figures in order to facilitate understanding of certain exemplary aspects of the present invention.
[0103] FIG. 1 is a control block diagram of a frame interpolator according to an exemplary embodiment of the present invention.
[0104] Referring to FIG. 1 , the frame interpolator includes a motion estimation unit 10 , a reliability evaluation unit 20 and a frame interpolation unit 30 .
[0105] In order to get the current frame F k Initial stadium BMV k , the motion estimation unit 10 converts the current frame F k Divided into blocks, each block is composed of B with a specific size k (m, n) index, and the motion estimation unit 10 assigns its motion to be at the current frame F k The block to be estimated in (hereinafter ref...
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A frame interpolator comprises a motion estimating unit dividing a current frame into a plurality of reference blocks, each reference block having a predetermined size, comparing the reference block with a predetermined search area set in a previous frame, and estimating an initial motion vector. A reliability evaluating unit evaluates reliability of the initial motion vector and generates reliability evaluation data regarding the evaluation result. A frame interpolating unit interpolates an intermediate frame to be inserted between the current frame and the previous frame on the basis of the initial motion vector and the reliability evaluation data A frame interpolator, a frame interpolation method, and a motion reliability evaluator, which are capable of improving interpolation quality of frames and reducing a block artifact, are provided.
Description
[0001] This application claims the benefit of Korean Patent Application No. 2005-0113660 filed with the Korean Intellectual Property Office on Nov. 25, 2005, the entire contents of which are hereby incorporated by reference. technical field [0002] The invention relates to a frame interpolator, a frame interpolation method and a motion reliability evaluator. More particularly, the present invention relates to a frame interpolator, a frame interpolation method, and a motion reliability evaluator using motion vector estimation and motion vector compensation. Background technique [0003] Generally, frame rate conversion refers to converting the frequency of an input image signal to a frequency suitable for an output standard. For example, to convert an image signal with a frequency of 50 Hz to a frequency of 100 Hz, a new frame is inserted between the original frames. At this time, if the original frame repetition or temporal linear interpolation method is used, motion blur ...
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IPC IPC(8): H04N7/01
CPCH04N7/468H04N19/00751H04N19/00721H04N7/014H04N7/2684H04N5/145H04N7/362H04N7/462H04N19/00745H04N19/00127H04N19/0066H04N19/00733H04N7/464H04N19/132H04N19/51H04N19/537H04N19/56H04N19/577H04N19/587
Inventor 陈汉锋金星秀成埈豪
Owner SAMSUNG ELECTRONICS CO LTD