CN101009768B - De-interlacing device for adaptable angle and its de-interlacing method - Google Patents

De-interlacing device for adaptable angle and its de-interlacing method Download PDF

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CN101009768B
CN101009768B CN200610004655A CN200610004655A CN101009768B CN 101009768 B CN101009768 B CN 101009768B CN 200610004655 A CN200610004655 A CN 200610004655A CN 200610004655 A CN200610004655 A CN 200610004655A CN 101009768 B CN101009768 B CN 101009768B
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display line
complexity
order
extreme value
angle
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CN101009768A (en
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任立寰
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MediaTek Inc
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MStar Semiconductor Inc Taiwan
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Abstract

The adaptive angular disinterlacing device comprises: a complexity detection module to output a control signal for indicating a second range according to the complexity of the target pixel first/second display line light distribution curve in first range, a limiter to receive the control signal and generate the possible edge angular similarity corresponding to the first/second display line pixel in the second range, a comparator to compare the similarity and select the better edge angle, and a mixer to generate target pixel data according to the better angle, wherein it is better that the complexity of the first/second display line is less than the threshold in the second range.

Description

The de-interlacer of adaptable angle and de-interlace method thereof
[technical field]
The invention relates to a kind of de-interlacer and de-interlace method thereof of adaptable angle, and particularly relevant for a kind of by detecting near extreme value or the complexity the object pixel, and find out the de-interlacer and the de-interlace method thereof of the adaptable angle of preferable edge angle accurately.
[background technology]
General film is to take and play in staggered (Interlace) mode.With the TV is example, and the broadcast of an one picture (Frame) is to broadcast earlier strange figure (an Odd Field), broadcasts bigraph field (Even Field) again and finishes.The strange figure field odd number display line of picture for this reason constitutes; And being the even number display line of picture for this reason, the bigraph field constitutes.
The renewal frequency of general TV (refresh rate) is 30Hz, just broadcasts 30 pictures in one second.Every picture is divided into strange figure field and the broadcast of bigraph field, so there are 60 figure in one second.
Because it is more and more high to the requirement of image quality, and noninterlaced (De-interlaced), also be called gradual (Progressive), the noninterlaced image quality is better than alternating expression image quality, therefore general advanced image player all has the function that noninterlaced is play, for example be high definition television (High Definition TV, HDTV) or the like.
If desire is play the alternating expression image with noninterlaced, need once broadcast with a complete picture after the alternating expression picture is carried out release of an interleave (De-Interlace) again.Two kinds of practices are arranged in the release of an interleave technology, and first kind of practice is directly a complete picture to be merged in adjacent strange figure field and bigraph field.This kind practice is easy to generate crenellated phenomena, and influences the image frame quality when the image nonstatic.
Second kind of practice of release of an interleave technology is that interpolation goes out the display line that is lacked in Qi Tuchang or bigraph field.Utilize the neighbouring display line in same figure field, each object pixel of corresponding interpolation is to produce the aforementioned display line that is lacked.
Furthermore, when desiring in same figure field, when interpolation goes out the display line that is lacked, need be the center with the object pixel of desiring interpolation in the display line, seek each possible edge angle; According in each possible edge angle, find out a correct edge angle again; And go out the correct GTG value of object pixel according to edge angle interpolation.
Yet whether corrupt the picture after the interpolation is good, depends on whether the selection of edge angle is correct, and the edge angle of mistake will cause the GTG value mistake of object pixel, and make the image quality after the interpolation can't reach the requirement of expection.
[summary of the invention]
In view of this, purpose of the present invention is exactly at de-interlacer that a kind of adaptable angle is provided and de-interlace method thereof.By detecting the extreme value or the complexity of adjacent two display lines in the same figure field, and find out preferable edge angle accurately, and according to preferable edge angle interpolation between aforementioned two display lines goes out suitable pixel data, cause the picture distortion to avoid wrong edge angle.
According to another object of the present invention, a kind of de-interlacer of adaptable angle is proposed. de-interlacer is according to adjacent first display line and second display line in the figure field of an alternating expression image, going out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation. de-interlacer comprises the complexity detection module, delimiter, comparator and blender. the complexity detection module is according to the complexity of the brightness distribution curve of first display line in first scope that corresponds to object pixel and second display line, and export a control signal, and control signal is in order to indicate one second scope, in second scope, the complexity of at least the first display line and second display line is less than critical value.
Delimiter is coupled to the complexity detection module, and delimiter receives control signal, and produces the similarity of the right probable edge angle of each pixel of first display line in second scope that corresponds to and second display line.Comparator is coupled to delimiter, and comparator is similarity relatively, to select a preferable edge angle from the probable edge angle.Blender is coupled to comparator, and blender is according to preferable edge angle, to produce the pixel data of object pixel.
According to a further object of the present invention, a kind of de-interlace method of adaptable angle is proposed, according to adjacent first display line and second display line in the figure field of an alternating expression image, go out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation.De-interlace method comprises the steps: at first, complexity according to the brightness distribution curve of first display line in first scope that corresponds to object pixel and second display line, export a control signal, and control signal is in order to indicate one second scope, preferably, in second scope, the complexity of at least the first display line and second display line is less than critical value.
Then, receive control signal, and produce the similarity of the right probable edge angle of each pixel of first display line in second scope that corresponds to and second display line.And then, compare similarity, from the probable edge angle, to select a preferable edge angle.At last, according to preferable edge angle, to produce the pixel data of object pixel.
According to a further object of the present invention, a kind of de-interlace method of adaptable angle is proposed.De-interlace method is in order to release of an interleave one figure field, and de-interlace method comprises the steps: at first, detects the complexity of adjacent objects pixel in figure.Then, carry out adaptable angle according to complexity and detect, to determine preferable edge angle.At last, produce the pixel data of object pixel with release of an interleave according to preferable edge angle.
According to a further object of the present invention, a kind of de-interlacer of adaptable angle is proposed.De-interlacer is according to adjacent first display line and second display line in the figure field of an alternating expression image, go out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation, each pixel of first display line and second display line is to representing the probable edge angle.De-interlacer comprises extreme value detection module, delimiter, comparator and blender.
When the extreme value detection module respectively has an extreme value in order to the brightness distribution curve when first display line in the scope that corresponds to object pixel and second display line, export a prediction signal, and prediction signal is in order to the angular range of a prediction of indication probable edge angle.
Delimiter is coupled to the extreme value detection module, and delimiter receives prediction signal, and produces the similarity of the probable edge angle in the angular range that corresponds to prediction.Comparator is coupled to delimiter, and comparator is similarity relatively, to select a preferable edge angle from the probable edge angle.Blender is coupled to comparator, and blender is according to preferable edge angle, to produce the pixel data of object pixel.
According to a further object of the present invention, a kind of de-interlace method of adaptable angle is proposed, according to adjacent first display line and second display line in the figure field of an alternating expression image, go out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation.Each picture element of first display line and second display line is to representing the probable edge angle.De-interlace method comprises the steps: at first, when the brightness distribution curve of first display line in the scope that corresponds to object pixel and second display line respectively has an extreme value, export a prediction signal, prediction signal is in order to the angular range of a prediction of indication probable edge angle.
Then, receive prediction signal, and produce the similarity of the probable edge angle in the angular range that corresponds to prediction.And then, compare similarity, from the probable edge angle, to select a preferable edge angle.At last, according to preferable edge angle, to produce the pixel data of object pixel.
According to a further object of the present invention, a kind of de-interlacer of adaptable angle is proposed. de-interlacer is according to adjacent first display line and second display line in the figure field of an alternating expression image, go out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation, each picture element of first display line and second display line is to representing the probable edge angle. and de-interlacer comprises complexity detection module, extreme value detection module, delimiter and blender.
The complexity detection module is according to the complexity of the brightness distribution curve of first display line in one first scope that corresponds to object pixel and second display line, export a control signal, and control signal is in order to indicate one second scope, preferably, be instructed in second scope, the complexity of at least the first display line and second display line is less than critical value.
When the extreme value detection module respectively has an extreme value in order to the brightness distribution curve when first display line in one the 3rd scope that corresponds to object pixel and second display line, export a prediction signal, prediction signal is in order to the angular range of a prediction of indication probable edge angle.
Delimiter receives control signal or prediction signal, and produces the similarity of the right probable edge angle of each pixel of first display line in second scope that corresponds to and second display line.Comparator is similarity relatively, to select a preferable edge angle from the probable edge angle.Blender is according to preferable edge angle, to produce the pixel data of object pixel.
According to a further object of the present invention, a kind of de-interlace method of adaptable angle is proposed, according to adjacent first display line and second display line in the figure field of an alternating expression image, go out to be positioned at the pixel data of the object pixel between first display line and second display line with interpolation, each picture element of first display line and second display line is to representing the probable edge angle.De-interlace method comprises the steps: at first, complexity according to the brightness distribution curve of first display line in one first scope that corresponds to object pixel and second display line, export a control signal, and control signal is in order to indicate one second scope, preferably, in second scope, the complexity of at least the first display line and second display line is less than critical value.
When the brightness distribution curve of first display line in one the 3rd scope that corresponds to object pixel and second display line respectively has an extreme value, export a prediction signal, and prediction signal is in order to the angular range of a prediction of indication probable edge angle.
Receive control signal or prediction signal, and produce the similarity of the right probable edge angle of each pixel of first display line in the angular range that corresponds to second scope or prediction and second display line.
Then, compare similarity, from the probable edge angle, to select a preferable edge angle.At last, according to preferable edge angle, to produce the pixel data of object pixel.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
[description of drawings]
It is first display line, second display line and the pixel schematic diagram for the treatment of the interpolation display line that Fig. 1 illustrates.
Fig. 2 illustrates and is the de-interlacer according to first embodiment of the invention.
Fig. 3 illustrates and is de-interlace method flow chart according to another embodiment of the present invention.
Fig. 4 illustrates and is the de-interlacer according to second embodiment of the invention.
Fig. 5 illustrates and is de-interlace method flow chart according to another embodiment of the present invention.
Fig. 6 illustrates and is the de-interlacer according to third embodiment of the invention.
Fig. 7 illustrates the de-interlace method flow chart into according to another embodiment of the present invention.
[embodiment]
De-interlacer is in order to alternating expression (Interlaced) video conversion to be noninterlaced (De-interlaced) image output. in order to find out preferable edge angle, make the display line that is lacked among the unusual figure of de-interlacer interpolation correctly field (Odd Field) or bigraph field (the Even Field).Following embodiment is by detecting first display line that is positioned at benefit display line to be inserted top in the same figure field (Field) and being positioned at second display line for the treatment of interpolation display line below, and according to the extreme value or the complexity of first display line and second display line, for example, to find out preferable edge angle accurately, make image frame more fine and smooth and clear.
Please refer to Fig. 1, it illustrates is first display line, second display line and the pixel schematic diagram for the treatment of the interpolation display line.The first display line L -1Comprise pixel P1～Pn, and treat interpolation display line L 0Comprise pixel P1 '～Pn ', and the second display line L + 1Comprise pixel P1 "～Pn ".
When de-interlacer is desired in the first display line L -1And the second display line L + 1Between interpolation go out to treat interpolation display line L 0Object pixel the time, de-interlacer is according to the first display line L -1And the second display line L + 1The extreme value or the complexity of brightness distribution curve, and be relevant to object pixel in the first display line L -1And the second display line L + 1The subregional pixel of last selection portion.
Represent each probable edge angle between selecteed partial pixel and object pixel, de-interlacer is found out preferable edge angle again from each probable edge angle, go out suitable pixel data to object pixel with interpolation, and pixel data for example is the GTG value.
For instance, desire interpolation when de-interlacer and go out to treat interpolation display line L 0On object pixel P100 ' time, de-interlacer is according to the first display line L -1And the second display line L + 1Extreme value or complexity, target P100 ' is in the first display line L -1Last selection pixel P81～P119, and target P100 ' is in the second display line L + 1Last selection pixel P81 "～P119 ".Object pixel P100 ' and pixel P81～P119 and pixel P81 "～P119 " produce a plurality of probable edge angles respectively; For example, pixel P100 and pixel P100 " represent probable edge angle A ngle0 with object pixel P100 '; and pixel P99 and pixel P101 " represent probable edge angle A ngle-1 with object pixel P100 ', and pixel P101 and pixel P99 " represent probable edge angle A ngle+1 with object pixel P100 '.By that analogy, pixel P81～P119 and pixel P81 "～P119 " represent 39 kinds of probable edge angles with object pixel P100 '.De-interlacer is found out the best edge angle again from 39 kinds of probable edge angles, and goes out suitable pixel data according to the angle interpolation of preferable edge.
First embodiment
Please refer to Fig. 2, it illustrates and is the de-interlacer according to first embodiment of the invention.De-interlacer 20 (1) comprises first internal memory 210, second internal memory 220, complexity detection module 230, delimiter (Qualifier) 240, comparator (Comparator) 250 and blender (Mixer) 260; And complexity detection module 230 comprises the first complexity detector 232, the second complexity detector 234 and logical-arithmetic unit 236.First internal memory 210 is in order to store the aforesaid first display line L -1, and second internal memory 220 is in order to store the aforesaid second display line L + 1(as shown in Figure 1).
The first complexity detector 232 corresponds to the first display line L in one first scope of object pixel in order to detection -1Its pixel data of each pixel in first scope forms a brightness distribution curve with location of pixels.The first complexity detector 232 is according to the first display line L -1The complexity output first of brightness distribution curve judge signal S1.And the first judgement signal S1 comprises a plurality of first flags, and first flag is in order to indicate the first display line L in first scope -1Complexity whether surpass critical value.For example, certain regional complexity can be utilized the number of extreme value quantity and determine, when a lot of extreme value appears in the image in the zone, represents the bright dark variation of image in the zone violent, image complexity height; Anti-then image complexity is low.
Similarly, the second complexity detector 234 corresponds to the second display line L in one first scope of object pixel in order to detection + 1Its pixel data of each pixel in first scope and the relation of location of pixels can be represented with brightness distribution curve.The second complexity detector 234 is according to the second display line L + 1The complexity output second of brightness distribution curve judge signal S2.Second judges that signal S2 comprises a plurality of second flags, in order to indicate the second display line L in first scope + 1Complexity whether surpass critical value.
First judges that signal S1 and second judges that signal S2 exports logical-arithmetic unit 236 respectively to, logical-arithmetic unit 236 judges that according to first signal S1 and second judges the computing of signal S2 actuating logic, for example logic OR (OR) computing or logical AND (AND) computing, and output control signal S3 is to delimiter 240 after computing finishes, and control signal S3 is in order to indicate one second scope.Preferably, if logical-arithmetic unit 236 is carried out the OR computing, be shown in the first display line L in second scope -1And the second display line L + 1, the complexity of the two brightness distribution curve of one wherein surpasses critical value at least, promptly represent complexity; Perhaps, if logical-arithmetic unit 236 is carried out the AND computing, be shown in the first display line L in second scope -1And the second display line L + 1, the complexity of its two brightness distribution curve all surpasses critical value person, just represents complexity, to determine the second suitable scope.
Delimiter 240 receives control signal S3, and produces the first display line L in second scope that corresponds to -1And the second display line L + 1The similarity Q of the right probable edge angle of each pixel; Whether for example, similarity Q is quantized the probability that each probable edge angle becomes preferable edge angle, for example exist equidirectional angle to determine by neighborhood pixels.
Comparator 250 receives the similarity Q of delimiter 240 outputs, and the similarity Q of each probable edge angle is compared, to select a preferable edge angle A from the probable edge angle.Blender 260 is again according to the pixel data D of preferable edge angle A with the generation object pixel; For example, blender 260 is got its mean value with the pixel data of neighbor on the preferable edge angle A, or the pixel data of neighbor on the preferable edge angle A is got its weight (Weight) mean value.
Please refer to Fig. 3, show de-interlace method flow chart according to a particular embodiment of the invention.De-interlace method can be used for above-mentioned de-interlacer 20 (1), and the de-interlace method flow process comprises the steps: at first that shown in step 310 complexity detection module 230 is according to the first display line L in first scope that corresponds to object pixel -1And the second display line L + 1The complexity output control signal S3 of brightness distribution curve, to indicate second scope.
Then shown in step 320, delimiter 240 receives control signal S3, and produces the first display line L in second scope that corresponds to -1And the second display line L + 1The similarity Q of the right probable edge angle of each pixel; In step 330, comparator 250 is similarity Q relatively, to select preferable edge angle A from the probable edge angle.Shown in step 340, blender 260 is according to preferable edge angle A, to produce the pixel data D of object pixel at last.
For instance, when being literal as if picture, its complexity is often higher; On the contrary, when being pattern as if picture, its complexity is often lower.Therefore, desire interpolation when de-interlacer 20 (1) and go out to treat interpolation display line L 0On object pixel P100 ' time (as shown in Figure 1), complexity detection module 230 is according to the first display line L in first scope that corresponds to object pixel P100 ' -1And the second display line L + 1The complexity output control signal S3 of brightness distribution curve.And the first display line L in first scope -1For example be pixel P75～P125, and the second display line L in first scope + 1For example be pixel P75 "～P125 ".
Preferably, as pixel P75～P125 and pixel P75 "～P125 " the complexity of brightness distribution curve during less than critical value, de-interlacer 20 (1) is chosen the second bigger scope.And the first display line L in the second bigger scope -1For example be pixel P90～P110, and the second display line L in second scope + 1For example be pixel P90 "～P110 ".
Preferably, when complexity during greater than critical value, for avoiding de-interlacer 20 (1) preferable edge angle is produced erroneous judgement, de-interlacer 20 (1) will be got the second less scope.And the first display line L in the second less scope -1For example be pixel P95～P105, and the second display line L in second scope + 1For example be pixel P95 "～P105 ".
By this, when complexity is high, de-interlacer 20 (1) will be found out the best edge angle from the second less scope, and will go out suitable pixel data according to the angle interpolation of preferable edge, and will be excessive and cause the selection mistake of preferable edge angle with the minimizing scope; For example, processed pixels can be utilized the window defining process range, and the size that window size is caught up with the scope of stating is relevant with the quantity of considering contiguous display line, in this embodiment with the first display line L -1With the second display line L + 1For example explanation.
Second embodiment
Please refer to Fig. 4, show de-interlacer according to second embodiment of the invention.In this embodiment, the first display line L that utilizes extreme value detection module 270 to detect in one the 3rd scope that corresponds to object pixel -1And the second display line L + 1Extreme value, for example, the first display line L in the 3rd scope -1And the second display line L + 1Brightness distribution curve when having an extreme value respectively, prediction of output signal S6.Prediction signal S6 is in order to the angular range of a prediction of indication probable edge angle.Make de-interlacer 20 (2) in the angular range of prediction, find out the best edge angle more accurately and go out suitable pixel data with interpolation.
Extreme value detection module 270 comprises the first extreme value detector 272, secondary extremal detector 274 and angle fallout predictor 276.The first extreme value detector 272 is in order to be detected on the first display line L in the 3rd scope -1The extreme value of brightness distribution curve, and export the first extreme value signal S4 according to the extreme value position of brightness distribution curve; For example, the online extreme value of certain bar demonstration can be utilized the mathematical operation of a subdifferential and determine, when positive and negative variation appears in a subdifferential, represents an extreme value to occur.
Similarly, secondary extremal detector 274 is in order to be detected on the second display line L in the 3rd scope + 1The extreme value of brightness distribution curve, and according to the extreme value position output secondary extremal signal S5 of brightness distribution curve.
The first display line L in the 3rd scope -1And the second display line L + 1Brightness distribution curve when having extreme value respectively, angle fallout predictor 276 is according to the first extreme value signal S4 and secondary extremal signal S5 prediction of output signal S6, to indicate the angular range of a prediction.
Delimiter 240 receives prediction signal S6, and produces the first display line L in the angular range that corresponds to prediction -1And the second display line L + 1The similarity Q ' of the right probable edge angle of each pixel.
Comparator 250 receives the similarity Q ' of delimiter 240 outputs, and is compared the similarity Q ' of each probable edge angle, to select a preferable edge angle A from the probable edge angle '.Blender 260 is again according to preferable edge angle A ' to produce the pixel data D ' of object pixel.
Please refer to Fig. 5, show de-interlace method flow chart according to a preferred embodiment of the present invention, can be used for above-mentioned de-interlacer 20 (2).At first shown in step 510, extreme value detection module 270 detects the first interior display line L of the 3rd scope -1And the second display line L + 1, and the first display line L in the 3rd scope that corresponds to object pixel -1And the second display line L + 1Brightness distribution curve when respectively having an extreme value, export a prediction signal S6, with the angular range of a prediction of indication probable edge angle.
Then shown in step 520, delimiter 240 receives prediction signal S6, and produces the similarity Q ' of each the probable edge angle in the angular range that corresponds to prediction; In step 530, comparator 250 is similarity Q ' relatively, to select preferable edge angle A from each probable edge angle '.Shown in step 540, blender 260 is according to preferable edge angle A at last ', to produce the pixel data D ' of object pixel.
For instance, desire interpolation when de-interlacer 20 (2) and go out to treat interpolation display line L 0On object pixel P100 ' time (as shown in Figure 1), extreme value detection module 270 is according to the first display line L in the 3rd scope that corresponds to object pixel P100 ' -1And the second display line L + 1The extreme value prediction of output signal S6 of brightness distribution curve.The first display line L in the 3rd scope -1For example be pixel P75～P125, and the second display line L in the 3rd scope + 1For example be pixel P75 "～P125 ".When the first extreme value detector 272 in the first display line L -1On pixel P102 when detecting extreme value, export the first extreme value signal S4 to angle fallout predictor 276.Similarly, when secondary extremal detector 274 in the second display line L + 1On pixel P98 " when also detecting extreme value, output secondary extremal signal S5 is to angle fallout predictor 276.
Angle fallout predictor 276 according to the first extreme value signal S4 and secondary extremal signal S5 prediction of output signal S6 to delimiter 240, to indicate the angular range of a prediction. the angular range of prediction for example be pixel P101～P103 and pixel P97 in this example "～P99 ". de-interlacer 20 (2) is according to pixel P101～P103 and pixel P97 "～P99 " and each probable edge angle of object pixel P100 ' representative in, accurately find out the best edge angle, and go out suitable pixel data according to the angle interpolation of preferable edge.
The 3rd embodiment
Please refer to Fig. 6, show the de-interlacer according to third embodiment of the invention, de-interlacer 20 (3) can detect the first display line L respectively by complexity detection module 230 and extreme value detection module 270 -1And the second display line L + 1Extreme value and/or complexity, come interpolation to go out suitable pixel data accurately to find out the best edge angle.
Please refer to Fig. 7, show de-interlace method flow chart according to a preferred embodiment of the present invention, can be used for above-mentioned de-interlacer 20 (3), at first shown in step 710, the first display line L in the 3rd scope that is relevant to object pixel -1And the second display line L + 1Brightness distribution curve when respectively having an extreme value, extreme value detection module 270 outputs one prediction signal S6 is with the angular range of a prediction of indication probable edge angle.
Then shown in step 720, if be relevant to the first interior display line L of the 3rd scope of object pixel -1And the second display line L + 1Brightness distribution curve have a plurality of extreme value the time, complexity detection module 230 is according to the first display line L in first scope that is relevant to object pixel -1And the second display line L + 1The complexity of brightness distribution curve, S3 is to indicate second scope for the output control signal, preferably, in second scope, at least the first display line L -1And the second display line L + 1Complexity less than critical value.
In step 730, delimiter 240 produces the first display line L in the angular range that corresponds to second scope or prediction according to control signal S3 and/or prediction signal S6 -1And the second display line L + 1The similarity Q of the right probable edge angle of each pixel ".
In step 740, comparator 250 is similarity Q relatively ", and from each probable edge angle, select preferable edge angle A according to this ".In step 750, blender 260 is according to preferable edge angle A at last " produce the pixel data D of object pixel ".
For instance, desire interpolation when de-interlacer 20 (3) and go out to treat interpolation display line L 0On object pixel P100 ' time (as shown in Figure 1), extreme value detection module 270 is according to the first display line L in the 3rd scope that corresponds to object pixel P100 ' -1And the second display line L + 1The extreme value of brightness distribution curve, with prediction of output signal S6; The first display line L in the 3rd scope -1For example be pixel P75～P125, and the second display line L in the 3rd scope + 1For example be pixel P75 "～P125 ".
Preferably, the first display line L in the 3rd scope -1And the second display line L + 1Brightness distribution curve have an extreme value respectively, for example extreme value detection module 270 is in the first display line L -1On the pixel P102 and the second display line L + 1On pixel P98 " when detecting extreme value respectively, then extreme value detection module 270 prediction of output signal S6 with indicate one the prediction angular range, and the prediction angular range for example be pixel P101～P103 and pixel P97 in this example "～P99 ".
Delimiter 240 produces pixel P101～P103 and pixel P97 "～P99 " with the similarity Q of the probable edge angle of object pixel P100 ' representative ".And by the similarity Q of comparator 250 from each probable edge angle ", select preferable edge angle A ", make that blender 260 is according to preferable edge angle A " produce the pixel data D of object pixel ".
On the other hand, the first display line L in the 3rd scope -1And the second display line L + 1Brightness distribution curve when having a plurality of extreme value, complexity detection module 230 will be according to the complexity output control signal S3 of the brightness distribution curve of first scan line in one first scope that corresponds to object pixel and second scan line, to indicate second scope.The first display line L in first scope -1For example be pixel P75～P125, and the second display line L in first scope + 1For example be pixel P75 "～P125 ".
The first display line L that control signal S3 control delimiter 240 produces in second scope that corresponds to -1And the second display line L + 1The similarity Q of the right probable edge angle of each pixel ".The first display line L in second scope -1For example be pixel P90～P110, and the second display line L in second scope + 1For example be pixel P90 "～P110 ".And by the similarity Q of comparator 250 from each probable edge angle ", compare preferable edge angle A ", make that blender 260 is according to preferable edge angle A " produce the pixel data D of object pixel ".
In sum, the present invention discloses a kind of de-interlacer of adaptable angle, in order to release of an interleave figure field, comprise complexity detection module, memory modules, delimiter, comparator and blender, the complexity detection module is in order to be relevant to the complexity of object pixel in the detection figure field, complexity is represented the extreme value quantity that exists in the zone of adjacent objects pixel; Memory modules is coupled to the complexity detection module, memory modules can be the line buffer (line buffer) in the LCD controller, in order to store a plurality of display lines, extensively, memory modules comprises in order to storing first internal memory of first display line, and in order to store second internal memory of second display line; Delimiter is coupled to the complexity detection module, in order to producing at least one probable edge angle, with in response to complexity; Comparator is coupled to delimiter, in order to select preferable edge angle in this at least one probable edge angle of basis; And blender is coupled to comparator, and in order to according to preferable edge angle, to produce the pixel data of object pixel, for example, the blender utilization goes out the pixel data of object pixel adjacent to first display line and second display line of object pixel with interpolation.
The present invention also discloses a kind of de-interlace method of adaptable angle of adaptable angle, in order to release of an interleave one figure field, at first detects the complexity of adjacent objects pixel in figure; Carry out adaptable angle according to complexity and detect, to determine preferable edge angle, for example, determine a window treatments scope according to complexity, when the complicated more then window treatments of complexity scope more little, anti-, when the uncomplicated more then window treatments of complexity scope big more; And, produce the pixel data of object pixel with release of an interleave according to preferable edge angle.
The de-interlacer of the disclosed adaptable angle of the above embodiment of the present invention and de-interlace method thereof.By detecting extreme value and/or the complexity that first display line and second shows online brightness distribution curve,, make image frame, literal more fine and smooth and clear to find out preferable edge angle accurately.
In sum; though the present invention is disclosed as above by preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.

Claims (30)

1. the de-interlacer of an adaptable angle, in order to release of an interleave one figure field, the de-interlacer of this adaptable angle comprises:
One complexity detection module comprises one first complexity detector, in order to one first complexity of the brightness distribution curve that is detected on this first display line in this first scope, judges signal to export one first; One second complexity detector in order to one second complexity of the brightness distribution curve that is detected on this second display line in this first scope, is judged signal to export one second; One logical-arithmetic unit, in order to first to judge that signal and this second judge signal according to this, carry out logical operation to export this control signal, described complexity detection module is in order to detect a complexity that is relevant to an object pixel in this figure field, this complexity detection module is according to the complexity of the brightness distribution curve of first display line in one first scope that is relevant to this object pixel and second display line, export a control signal, this control signal is in order to indicate one second scope according to this complexity;
One delimiter is coupled to this complexity detection module, receives the control signal of indication second scope, in order to producing the similarity of at least one probable edge angle, with in response to this complexity;
One comparator is coupled to this delimiter, selects a preferable edge angle in order to the similarity according to this at least one probable edge angle; And
One blender is coupled to this comparator, in order to this preferable edge angle of basis, to produce a pixel data of this object pixel.
2. the de-interlacer of adaptable angle according to claim 1 is characterized in that, this blender utilizes this first display line and this second display line adjacent to this object pixel, goes out this pixel data of this object pixel with interpolation.
3. the de-interlacer of adaptable angle according to claim 1 is characterized in that, this de-interlacer more comprises a memory modules, and this memory modules is coupled to this complexity detection module.
4. the de-interlacer of adaptable angle according to claim 1 is characterized in that, the extreme value quantity that exists in the zone of contiguous this object pixel of this complexity representative.
5. the de-interlacer of adaptable angle according to claim 1 is characterized in that, this logical-arithmetic unit is in order to actuating logic or (OR) computing or logical AND (AND) computing.
6. the de-interlacer of adaptable angle according to claim 1 is characterized in that, this first judges that signal comprises a plurality of first flags, and these first flags are respectively in order to this first complexity of the brightness distribution curve of indicating this first display line.
7. the de-interlacer of adaptable angle according to claim 1 is characterized in that, this second judges that signal comprises a plurality of second flags, and these second flags are respectively in order to this second complexity of the brightness distribution curve of indicating this second display line.
8. the de-interlacer of adaptable angle according to claim 3 is characterized in that, this memory modules is a line buffer.
9. the de-interlacer of adaptable angle according to claim 3 is characterized in that, this memory modules comprises:
One first internal memory is in order to store this first display line; And
One second internal memory is in order to store this second display line.
10. the de-interlacer of adaptable angle according to claim 4 is characterized in that, the extreme value quantity that exists in this zone obtains by differential calculation.
11. the de-interlacer of adaptable angle according to claim 1, it is characterized in that, more comprise an extreme value detection module, with described delimiter coupling, be relevant to first display line in one the 3rd scope of this object pixel and the extreme value of second display line in order to detection, to export a prediction signal, this prediction signal is in order to the angular range of indication probable edge angle one prediction.
12. the de-interlacer of adaptable angle according to claim 11, it is characterized in that, this extreme value detection module is when the brightness distribution curve of one first display line in the 3rd scope that is relevant to this object pixel and one second display line respectively has an extreme value, exports this prediction signal to indicate the angular range of this prediction.
13. the de-interlace method of an adaptable angle, in order to release of an interleave one figure field, the de-interlace method of this adaptable angle comprises:
Step 1, detect a complexity of a contiguous object pixel in this figure field, wherein, this complexity according to the brightness distribution curve of one first display line in one first scope that is relevant to this object pixel and one second display line, export a control signal, this control signal is in order to indicate one second scope according to this complexity;
Step 2, the similarity that produces at least one probable edge angle is to respond this complexity;
Step 3 is selected a preferable edge angle according to the similarity of this at least one probable edge angle; And
Step 4 is according to this preferable edge angle, to produce a pixel data of this object pixel.
14. de-interlace method according to claim 13 is characterized in that, the step of this generation pixel data is this first display line and this second display line that utilizes adjacent to this object pixel, goes out this pixel data of this object pixel with interpolation.
15. de-interlace method according to claim 13 is characterized in that, the extreme value quantity that exists in the zone of contiguous this object pixel of this complexity representative.
16. de-interlace method according to claim 13, it is characterized in that this step that produces at least one probable edge angle is the similarity that produces this right at least one probable edge angle of a plurality of pixels of this first display line correspond in this second scope and this second display line.
17. de-interlace method according to claim 16 is characterized in that, this step of selecting preferable edge angle is the similarity of this at least one probable edge angle relatively, to select a preferable edge angle from the similarity of this at least one probable edge angle.
18. de-interlace method according to claim 13, it is characterized in that, between described step 1 and the step 2, more comprise the step that an extreme value detects, be relevant to first display line in one the 3rd scope of this object pixel and the extreme value of second display line in order to detection, to export a prediction signal, this prediction signal is in order to the angular range of indication probable edge angle one prediction.
19. de-interlace method according to claim 18, it is characterized in that, it is when the brightness distribution curve of this first display line in the 3rd scope that is relevant to this object pixel and this second display line respectively has an extreme value that this extreme value detects step, exports this prediction signal to indicate the angular range of this prediction.
20. the de-interlace method of an adaptable angle, in order to release of an interleave one figure field, the de-interlace method of this adaptable angle comprises:
Detect a complexity of a contiguous object pixel in this figure field;
Obtain a window treatments scope according to this complexity, and carry out adaptable angle and detect, determining a preferable edge angle, when complicated more then this window treatments scope of this complexity more little; And
According to this preferable edge angle, produce a pixel data of this object pixel with release of an interleave.
21. the de-interlacer of an adaptable angle, in order to release of an interleave one figure field, the de-interlacer of this adaptable angle comprises:
One extreme value detection module, be relevant at least one extreme value place of the brightness distribution curve in one first scope of this object pixel in order to detection, to export a prediction signal, in order to indicate the angular range of a prediction, wherein, this extreme value detection module be when the brightness distribution curve of one first display line in one first scope that is relevant to this object pixel and one second display line respectively have an extreme value time, export the angular range of this prediction signal with this prediction of indicating this at least one probable edge angle;
One delimiter is coupled to this extreme value detection module, in order to produce the similarity of at least one probable edge angle, with the angular range in response to this prediction;
One comparator is coupled to this delimiter, selects a preferable edge angle in order to the similarity according to this at least one probable edge angle; And
One blender is coupled to this comparator, in order to this preferable edge angle of basis, to produce a pixel data of this object pixel.
22. the de-interlacer of adaptable angle according to claim 21 is characterized in that, this blender utilizes this first display line and this second display line adjacent to this object pixel, goes out this pixel data of this object pixel with interpolation.
23. the de-interlacer of adaptable angle according to claim 21 is characterized in that, this de-interlacer more comprises a memory modules, and this memory modules is coupled to this extreme value detection module.
24. the de-interlacer of adaptable angle according to claim 23 is characterized in that, this memory modules is a line buffer.
25. the de-interlacer of adaptable angle according to claim 23 is characterized in that, this memory modules comprises:
One first internal memory is in order to store this first display line; And
One second internal memory is in order to store this second display line.
26. the de-interlacer of adaptable angle according to claim 21 is characterized in that, this extreme value detection module comprises:
One first extreme value detector is in order to one first extreme value place of the brightness distribution curve that is detected on this first display line in this first scope, to export one first extreme value signal;
One secondary extremal detector is in order to a secondary extremal position of the brightness distribution curve that is detected on this second display line in this first scope, to export a secondary extremal signal; And
One angle fallout predictor in order to according to this first extreme value signal and this secondary extremal signal, is exported this prediction signal.
27. the de-interlace method of an adaptable angle, in order to release of an interleave one figure field, the de-interlace method of this adaptable angle comprises:
At least one extreme value place that detects a contiguous object pixel in this figure field is to export a prediction signal, this prediction signal is in order to indicate the angular range of a prediction, wherein, when the brightness distribution curve of one first display line in the preset range that is relevant to this object pixel and one second display line respectively has an extreme value, export this prediction signal to indicate the angular range of this prediction;
The similarity that produces at least one probable edge angle is to respond the angular range of this prediction;
Select a preferable edge angle according to the similarity of this at least one probable edge angle; And
According to this preferable edge angle, to produce a pixel data of this object pixel.
28. de-interlace method according to claim 27 is characterized in that, the step of this generation pixel data is this first display line and this second display line that utilizes adjacent to this object pixel, goes out the pixel data of this object pixel with interpolation.
29. de-interlace method according to claim 27 is characterized in that, at least one extreme value place is just reaching negative variation by the generation of differentiating and is determining.
30. de-interlace method according to claim 27 is characterized in that, this detection step comprises:
Be detected on the extreme value of the brightness distribution curve of this first display line in this preset range, to export one first extreme value signal;
Be detected on the extreme value of the brightness distribution curve of this second display line in this preset range, to export a secondary extremal signal; And
According to this first extreme value signal and this secondary extremal signal, to export this prediction signal to indicate the angular range of this prediction.
CN200610004655A 2006-01-27 2006-01-27 De-interlacing device for adaptable angle and its de-interlacing method Expired - Fee Related CN101009768B (en)

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