CN102300071A - Method and device for processing movie mode video signal - Google Patents
Method and device for processing movie mode video signal Download PDFInfo
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- CN102300071A CN102300071A CN2010102055674A CN201010205567A CN102300071A CN 102300071 A CN102300071 A CN 102300071A CN 2010102055674 A CN2010102055674 A CN 2010102055674A CN 201010205567 A CN201010205567 A CN 201010205567A CN 102300071 A CN102300071 A CN 102300071A
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Abstract
The invention discloses a method and device for processing a movie mode video signal. The method for processing a movie mode video signal comprises the following steps of: judging whether a current field is a 24-1 pull-down duplicated field or a standard 2-2 poll-down field according to one or the combination of a homo-polar field difference, a hetero-polar field difference and a homo-polar quaternary field difference corresponding to the current field; and processing the signal according to the type of the current field. In the invention, the size change relation between the homo-polar filed difference and/or the hetero-polar field difference and/or the homo-polar quaternary field difference corresponding to the 24-1 pull-down duplicated filed and the homo-polar filed difference and/or the hetero-polar field difference and/or the homo-polar quaternary field difference of a field which is adjacent to the current field or related to be current field is computed and compared easily, so that detection of the 24-1 pull-down duplicated filed is effectively realized, and the playing quality of the movie video signal is greatly improved.
Description
Technical field
The present invention relates to field of video image processing, relate in particular to movie mode video signal processing method and device.
Background technology
Along with the expansion of video screen size and the development of high definition technology, increasing people is chosen in and watches film on the video screen.At present, when the Making Movies material, video camera is normally taken according to the frame per second of per second 24 frames, obtains the movie mode video signal of lining by line scan.And for control bandwidth, existing television system adopts interleaved mode to handle vision signal to be played.The interlaced scan tv signaling mode that is adopted by most countries mainly comprise 60/second with (the National Television System Committee of NTSC, NTSC) Ming Ming colour television standard TV signal and 50 s'/second line-by-line inversion (Phase Alternation Line, PAL) colour television standard TV signal.Therefore, produced difference between the playback rate of the speed of movie mode video signal and TV signal.For movie glibly on television set, be necessary movie mode video signal is handled.
Movie mode video signal processing mode commonly used comprises: 3-2 glass tube down-drawing (3-2pull-down), or 2-2 glass tube down-drawing (2-2pull-down).Owing to mixing movie mode video signal and TV signal in the television system, in playing process, need detect and handle based on TV signal and the movie mode video signal of above-mentioned two kinds of methods usually to mixed editorial.
Wherein, 3-2 glass tube down-drawing (3-2pull-down) is meant two adjacent frame signals is splitted into Liang Chang and three field signals respectively, make when successively the field signal that is obtained being play, the TV signal broadcast request that can meet 60 of per seconds is used for movie mode video signal is converted to TSC-system formula TV signal more.The patent No. 200510042778, x, name are called the detection method of having introduced a kind of movie mode video signal based on the 3-2 glass tube down-drawing in the Chinese invention patent of " detection method of the drop-down film source video of a kind of 3:2 ".
Another kind of comparatively common processing mode, be that 2-2 glass tube down-drawing (2-2pull-down) is meant, utilize a reproduction technology, the even field that every frame signal is splitted into the odd field that comprises all frame odd-numbered line pixels and comprises all frame even number line pixels, and play the odd field and the even field of every frame successively, wherein, described odd field or even field all are drop-down of standard 2-2.
Yet, when adopting the 2-2 glass tube down-drawing, owing to adopt the technology of duplicate field the film video conversion of signals of per second 24 frames can only be become 48 of per seconds, and for Phase Alternation Line system, per second need be play 50 field picture.Be not difficult to find that only simple must duplicate and conversion can cause the quickening of movie speed caused the discomfort or the playback error of watching.Indemnifying measure at present comparatively commonly used is to adopt the 24-1 glass tube down-drawing, promptly after per 24 field picture, subsequently a two field picture is splitted into 3, and wherein the 3rd is the duplicate field of one of this frame signal corresponding fields, i.e. the drop-down duplicate field of 24-1.
At present, be devoted to drop-down of examination criteria 2-2 usually, do not consider the existence of 24-1 pulldown conditions wherein based on the film mode detection method of existing 2-2 glass tube down-drawing.For example, application number is 02813837.6, name is called in the Chinese invention patent application of " equipment and the method for judging vision signal " and has proposed the drop-down film mode detection method of a kind of 2-2, it is identical utilizing the color difference signal value of the same position of two fields that same frame constitutes, and whether does not belong to film mode even the parity field of image has correlation also can judge.The patent No. is that 200610138752.X, name are called that the Chinese invention patent of " a kind of method, device and display that detects television movie mode " and the patent No. are 02113843.5, name is called in the Chinese invention patent of " Digital Detecting Method of telecine scene " and has also respectively proposed the drop-down film mode detection method of a kind of 2-2, all is that the characteristics that strange of producing according to same frame and even field pattern like height correlation detect film mode.More than 3 patents all do not consider the 24-1 pulldown conditions.
Yet, if the 24-1 pulldown conditions is not detected and distinguishes, can when handling the wrong plug direction appear, produce the phenomenon of sprouting wings, and have influence on image quality, even can jump out film mode, and then reenter, badly influence the result of broadcast of video.
Summary of the invention
The technical problem that the present invention solves provides a kind of movie mode video signal processing method and device, based on 24-1 is drop-down movie mode video signal is detected and handles.
For solving the problems of the technologies described above, the invention provides a kind of movie mode video signal processing method, comprise:, judge describedly to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2 when the front court according to one of, heteropolarity field difference poor and four differences of same polarity or its combination when the same polarity field of front court correspondence; According to described type, signal is handled when the front court.
Optionally, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: it is poor to calculate described same polarity field of working as the front court correspondence, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, when described described same polarity field difference when the front court correspondence is minimum value, then described when the front court be the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
Optionally, described first to set number be natural number arbitrarily among the 9-24.
Optionally, described first to set number be 10.
Optionally, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: calculates described when the front court and described before the front court heteropolarity field of at least two place correspondences poor and compare, when described when front court and its previous field during continuously corresponding to two less heteropolarity fields differences, then described when the front court be the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
Optionally, described calculating when the front court and before the front court at least two place correspondences heteropolarity field difference and relatively comprise: it is poor to calculate described heteropolarity field of working as front court and preceding each correspondence thereof; Described heteropolarity field when front court and previous field thereof is poor, and corresponding with described each place before the previous field of front court respectively heteropolarity field difference compares.
Optionally, described calculating when the front court and before the front court heteropolarity field difference of at least two place correspondences also relatively comprises: calculate and comprise that at least the heteropolarity field of n field, n-1 field and n-2 field correspondence is poor, wherein, the n field is the described front court of working as; The absolute difference of the absolute difference of the heteropolarity field difference of comparison n field and n-1 field and the heteropolarity field difference of n field and n-2 field; When the absolute difference that the absolute difference of the heteropolarity field of n field and n-1 field difference differs from less than the heteropolarity field of n field and n-2 field, then the n field is the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
Optionally, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: calculates described when the front court and describedly work as front court four differences of same polarity and the comparison of at least two place correspondences before, when described when four differences of front court same polarity much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
Optionally, described calculating described when the front court and before the front court at least two place correspondences four differences of same polarity and comprise more further: four differences of same polarity of calculating a correspondence behind the front court, when described when four differences of same polarity of one behind the front court much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
Optionally, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: it is poor to calculate described same polarity field of working as the front court correspondence, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, be minimum value when described same polarity field when the front court correspondence is poor, proceed the detection of heteropolarity field difference, otherwise the described front court of working as is drop-down of standard 2-2; Calculate described when the front court and described before the front court heteropolarity field difference and relatively of at least two place correspondences, when described when front court and its previous field during continuously corresponding to two less heteropolarity fields differences, proceed the detection of four differences of same polarity, otherwise the described front court of working as is drop-down of standard 2-2; Calculate described when front court and described when front court four differences of same polarity and the comparison of at least two place correspondences before, when described four differences of same polarity when the front court correspondence much larger than described when four of arbitrary pairing same polarities in two fields before the front court are poor, then described when the front court be the drop-down duplicate field of 24-1, otherwise described when the front court be that standard 2-2 is drop-down.
Optionally, described when four differences of front court same polarity much larger than described before the front court in two fields four differences of arbitrary pairing same polarity comprise, described when four differences of front court same polarity be described before the front court in two fields three times of four differences of arbitrary pairing same polarity, or surpass described in two fields before the front court more than three times of four differences of arbitrary pairing same polarity.
The present invention also provides a kind of movie mode video signal processing unit, at least comprise: detecting unit, be used for according to one of, heteropolarity field difference poor and four differences of same polarity or its combination, judge describedly to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2 when the front court when the same polarity field of front court correspondence; Signal processing unit is used for the testing result according to described detecting unit, and signal is handled.
Optionally, described detecting unit comprises at least: the detection mode selected cell is used to select that the same polarity field is poor, one of heteropolarity field difference and four differences of same polarity or its combination detect when the front court described, and send the detection mode indicator; Difference computational unit is used for according to described detection mode indicator, and the same polarity field of calculating correspondence is poor and/or the heteropolarity field is poor and/or four differences of same polarity; Memory cell is used to store the result of calculation of described difference computational unit; Comparing unit is used for according to described detection mode indicator the result of calculation in the described memory cell being compared.
Optionally, described detection mode selected cell also can comprise assembled unit, is used for the difference detection of same polarity field, heteropolarity field difference are detected and four poor one or more that detect of same polarity, is provided with predefined procedure, to form described detection mode.
Optionally, described predefined procedure comprise that the same polarity field is poor, one or more the putting in order arbitrarily of combination in any in heteropolarity field difference and four differences of same polarity.
Compared with prior art, the present invention has the following advantages:
The respective embodiments described above of the present invention, make full use of between frame and the frame and split by frame data the field that obtains with between the rule of pixel variation, poor according to the same polarity field corresponding with the drop-down duplicate field of 24-1, and/or heteropolarity field difference and and/or four differences of same polarity, compared to be adjacent or the pairing same polarity of dependent field field poor, and/or heteropolarity field difference and and/or four differences of same polarity between the size variation relation, by simple calculating and comparison, obtain reliable result, realized effectively from standard 2-2 is drop-down and the differentiation of the duplicate field that 24-1 is drop-down, thereby avoided faulty operation and the emergence that brings thus that wrong identification brings or jumped out the phenomenon that film mode etc. makes the movie quality deterioration, improved the play quality of movie mode video signal greatly.
Description of drawings
By the more specifically explanation of the preferred embodiments of the present invention shown in the accompanying drawing, above-mentioned and other purpose, feature and advantage of the present invention will be more clear.Reference numeral identical in whole accompanying drawings is indicated identical part.Painstakingly do not draw accompanying drawing, focus on illustrating purport of the present invention by actual size equal proportion convergent-divergent.
Fig. 1 is the schematic flow sheet of movie mode video signal processing method of the present invention;
Fig. 2 is the schematic diagram data of movie mode video signal processing method embodiment of the present invention;
Fig. 3 is the schematic diagram data of a kind of embodiment of movie mode video signal processing method of the present invention;
Fig. 4 is the schematic diagram data of the another kind of embodiment of movie mode video signal processing method of the present invention;
Fig. 5 is the schematic flow sheet of the another kind of concrete example of movie mode video signal processing method of the present invention;
Fig. 6 is the schematic diagram data of another embodiment of movie mode video signal processing method of the present invention;
Fig. 7 is the schematic flow sheet of another embodiment of movie mode video signal processing method of the present invention;
Fig. 8 is the structural representation of movie mode video signal processing unit execution mode of the present invention;
Fig. 9 is the structural representation of a kind of embodiment of detecting unit shown in Figure 8;
Figure 10 is the structural representation of the another kind of embodiment of detecting unit shown in Figure 8.
Embodiment
The inventor puts into practice by long term studies, sum up the method that the drop-down duplicate field of existing 24-1 in the movie mode video signal is detected and distinguishes, poor by calculating the same polarity field of working as the front court correspondence, heteropolarity field difference and four differences of same polarity, and it is respectively that result of calculation is poor with other same polarity field successively, heteropolarity field difference and four differences of same polarity compare, when described same polarity field when the front court poor, when heteropolarity field difference and four differences of same polarity conform to a predetermined condition, judge that working as the front court is the drop-down duplicate field of 24-1, thereby effectively that 24-1 is drop-down duplicate field distinguishes from standard 2-2 is drop-down, has avoided the mistake duplicate field that 24-1 is drop-down to be used as drop-down of standard 2-2 and the faulty operation and the emergence that brings thus that bring or jump out the phenomenon that film mode etc. makes the movie quality deterioration.
Below in conjunction with the drawings and specific embodiments, embodiment of the present invention is further specified.
A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement much to be different from alternate manner described here, and those skilled in the art can do similar popularization under the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public concrete enforcement.
With reference to figure 1, the invention provides a kind of movie mode video signal processing method, comprise: step S1, according to one of, heteropolarity field difference poor when the same polarity field of front court correspondence and four differences of same polarity or its combination, judge when the front court to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2; Step S2 according to the type when the front court, handles signal.
When adopting the 2-2 glass tube down-drawing, the even field that every frame movie mode video signal has been splitted into the odd field that comprises all frame odd-numbered line pixels successively and comprised all frame even number line pixels.Wherein, be the same polarity field between the odd field of each frame correspondence or between the even field of each frame correspondence, and the polarity of different frame correspondence different the field between, promptly the odd field of the frame correspondence even field corresponding with another frame is the heteropolarity field.Between two odd fields of adjacent two frame correspondences or be adjacent same polarity field between two even fields, and the odd field of a frame correspondence is adjacent between the even field of frame correspondence and is adjacent heteropolarity field.The difference of the pixel of adjacent same polarity field correspondence position is same polarity field difference or two differences of same polarity, and the difference of the pixel of adjacent heteropolarity field correspondence position is poor for the heteropolarity field, and the difference between two differences of two same polarities then is called four differences of same polarity.
How the drop-down duplicate field E3 of 24-1 to be detected below by a kind of concrete example detailed description by movie mode video signal processing method of the present invention.Wherein, with reference to figure 2, frame A, B, C, D and E are respectively each frame movie mode video signal, and its midfield A1 and A2, a B1 and B2, a C1 and C2, a D1 and D2, an E1 and E2 are respectively frame A, frame B, frame C, frame D, split odd field and the even field of frame E; Field E3 is the duplicate field of an E1; Between field A1, B1, C1, D1, E1 and the E3 is the same polarity field in twos, between field A2, B2, C2, D2 and the E2 is the same polarity field in twos, and among A1, B1, C1, D1, E1 and the E3 arbitrary, with heteropolarity field each other, arbitrary field among field A2, B2, C2, D2 and the E2.
In a kind of embodiment, step S1 can comprise at least: it is poor that the same polarity field of front court correspondence is worked as in calculating, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, when being minimum value when the described same polarity field of front court correspondence difference, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
The same polarity field of calculating each at first, successively is poor.With reference to figure 3, the pixel value difference of calculated field A1 and B1 correspondence position, obtain the same polarity field and differ from 301, similarly, the same polarity field that obtains an A2 and B2 differs from 302, the same polarity field of a B1 and C1 differs from 303, the same polarity field of a B2 and C2 differs from 304, the same polarity field of a C1 and D1 differs from 305, the same polarity field of field C2 and D2 differs from 306, the same polarity field of field D1 and E1 differs from 307, the same polarity field of field D2 and E2 differ from 308 and the same polarity field of field E1 and E3 differ from 309.
Wherein, two fields of same polarity field difference 301-308 correspondence come from different frame signals respectively, and the same polarity field differs from the field E1 and the E3 of 309 correspondences and comes from same frame E, therefore, the same polarity field differ from 309 will be in the difference 301-308 of same polarity field any.That is to say, obtain each same polarity field when difference by step S201, when the same polarity field when the front court correspondence poor, poor compared to the same polarity field of first a setting number place correspondence before this, during for minimum value, then working as the front court probably is the drop-down duplicate field of 24-1.
Because the drop-down duplicate field of this 24-1 is inserted after 24 fields, and the same polarity field difference of this duplicate field correspondence same polarity field of arbitrary place correspondence in preceding 24 fields of this duplicate field is poor, therefore, the described first setting number can be and is no more than 24 natural number.Yet set number and set when too small when described first, cause erroneous judgement easily, the inventor is through discovering, for obtaining testing result comparatively accurately, first sets number needs greater than 8, and for example, described first sets number can be made as 10.
In another kind of embodiment, step S1 can comprise at least: calculate when the front court and described before the front court heteropolarity field difference and relatively of at least two place correspondences, when when front court and its previous field during continuously corresponding to two less heteropolarity fields differences, then when the front court be the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
Specifically, it is poor to calculate the heteropolarity field of each correspondence respectively.With reference to figure 4, the pixel value difference of calculated field A1 and A2 correspondence position, obtain the heteropolarity field and differ from 401, similarly, the heteropolarity field that obtains an A2 and B1 differs from 402, the heteropolarity field of a B1 and B2 differs from 403, the heteropolarity field of a B2 and C1 differs from 404, the heteropolarity field of a C1 and C2 differs from 405, the heteropolarity field of a C2 and D1 differs from 406, the heteropolarity field of field D1 and D2 differs from 407, the same polarity field of field D2 and E1 differs from 408, the heteropolarity field of field E1 and E2 differ from 409 and the heteropolarity field of field E2 and E3 differ from 410.
Because A1 and A2 belong to same frame signal, and an A2 is derived from different frame signals with B1, and the heteropolarity field between field A2 and the B1 differs from 402 and differs from 401 greater than the heteropolarity field between field A1 and the A2; Similarly, the heteropolarity field between B1 and the B2 differs from 403 and differs from 402 less than the heteropolarity field between field A2 and the B1.Be not difficult to find that for 24 that do not contain the drop-down duplicate field E3 of 24-1, from first to the 24, heteropolarity field difference is " little " " greatly " repetition rule at interval.But owing to inserted duplicate field E3 after 24, an E3 and E1, an E2 are derived from same frame signal, therefore, the heteropolarity field between an E1 and the E2 differ from 409 or an E2 and E3 between the heteropolarity field differ from 410, the heteropolarity field that all is less than between a D2 and the E1 differs from 408.
That is to say that when the drop-down duplicate field E3 of 24-1 occurring, can break the repetition rule at original " little " " greatly " of heteropolarity field difference interval, this duplicate field E3 and its previous field E2 are poor corresponding to two less heteropolarity fields continuously.In a kind of specific embodiment, the step S1 that adopts heteropolarity field difference to detect can comprise: it is poor to calculate described heteropolarity field of working as front court and preceding each correspondence thereof; Described heteropolarity field when front court and previous field thereof is poor, and corresponding with described each place before the previous field of front court respectively heteropolarity field difference compares.
In another kind of specific embodiment,, can calculate the absolute difference of heteropolarity field difference for the accuracy of further testing result.Specifically, with reference to figure 5, step S1 can comprise: step T1, and calculating comprises that at least the heteropolarity field of n field, n-1 field and n-2 field correspondence is poor; Step T2, the relatively absolute difference of the heteropolarity field difference of the absolute difference of the heteropolarity field of n field and n-1 field difference and n field and n-2 field; When the absolute difference that the absolute difference of the heteropolarity field of n field and n-1 field difference differs from less than the heteropolarity field of n field and n-2 field, then the n field is the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.Wherein, described when the front court be the n field.
In conjunction with Fig. 4, at first, the same polarity field of calculated field D2 and E1 differs from 408, the heteropolarity field of an E1 and E2 differ from 409 and the heteropolarity field of field E2 and E3 differ from 410.Then, relatively the heteropolarity field differs from 410 and 409 absolute difference, and the heteropolarity field differs from 410 and 408 absolute difference.Because E1, E2 and E3 are derived from same frame signal, the frame signal that belongs to field C2 is different, so the difference that the heteropolarity field differs between 410 and 409 differs from difference between 410 and 408 less than the heteropolarity field; On the contrary, when the heteropolarity field differs from 410 and 409 absolute difference when differing from 410 and 408 absolute difference less than the heteropolarity field, at this moment, " little " " greatly " that heteropolarity field difference is followed in the drop-down place of standard 2-2 repetition rule at interval, therefore, differ from 410 pairing E3 with the heteropolarity field and probably be the drop-down duplicate field of 24-1.
In another embodiment, step S1 can comprise at least: calculate when front court and described when front court four differences of same polarity and the comparison of at least two place correspondences before, when described when four differences of front court same polarity much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
In embodiment, also can comprise further, calculate four differences of same polarity of a place correspondence behind the front court, and with described corresponding four differences of same polarity at least two places are relatively before the front court, when described when four differences of same polarity of one behind the front court much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
Four differences of same polarity are poor for the same polarity field, i.e. two differences of same polarity, between difference.Specifically, it is poor to calculate the same polarity field earlier, calculates corresponding four differences of same polarity again.With reference to figure 6, a F1 is a split field of frame F.
At first, the pixel value difference of calculated field A1 and B1 correspondence position obtains the same polarity field and differs from 600; Similarly, the same polarity field that obtains an A2 and B2 differs from 601, the same polarity field of a B1 and C1 differs from 602, the same polarity field of a B2 and C2 differs from 603, the same polarity field of a C1 and D1 differs from 604, the same polarity field of a C2 and D2 differs from 605, the same polarity field of field D1 and E1 differs from 606, the same polarity field of field D2 and E2 differs from 607, the same polarity field of field E1 and E3 differ from 608 and the same polarity field of field E3 and F1 differ from 609.
Secondly, according to above-mentioned checkout result, calculate four differences of same polarity.Calculate the same polarity field and differ from 605 and differ from 606 absolute difference, obtain four of same polarities and differ from 616 with the same polarity field; Similarly, obtaining to differ from 606 and 607 four of same polarities corresponding to the same polarity field differs from 617, differs from 607 and 608 four of same polarities corresponding to the same polarity field and differ from 618 and differ from 608 and 609 four of same polarities corresponding to the same polarity field and differ from 619.
Differ from 618 and 616 for four of same polarities, because four differences of same polarity are the difference between two differences of same polarity, the same polarity field of E3 correspondence differs from 608 and differs from 607 much smaller than the same polarity field, and the same polarity field differs from 605 and 606 and all relates to two frame data, and the same polarity field differs from that difference between 605 and 606 is inevitable to differ from 618 much smaller than four of same polarities.Similarly, four of same polarities differ from 619 and also differ from 616 much larger than four of same polarities.In addition, because that four of same polarities differ from is 616 relevant with E1 with field D2, a C1, C2, relate to three frame data, and four of same polarities differ from 617 and only relate to two frame data, in general, four of same polarities differ from 617 and differ from 616 less than four of same polarities.That is to say, when when four differences of same polarity of front court correspondence and behind the front court four differences of same polarity of a correspondence much larger than four differences of same polarity of first or second before the front court, then when the front court be the drop-down duplicate field of 24-1.Above-mentioned mentioned much larger than, can be meant a bigger side three times specifically for a less side, perhaps surpass more than three times of a less side, be convenient to identification and judge.
In concrete practice process, according to inventive concept of the present invention, often only the same polarity field is poor by finishing, in heteropolarity field difference and four differences of same polarity after one or two the verification step, whether can infer this largely is the drop-down duplicate field of 24-1.Yet, it should be appreciated by those skilled in the art that selection and combination that this verification step is suitable, be that sacrifice with certain accuracy is a prerequisite.When the accuracy that is realized in allowed band, in the time of perhaps can directly knowing the testing result of bringing according to described omission step by other known conditioned disjunction prior art, the selection of this verification step and combination are not tackled inventive concept of the present invention and are impacted.
That the present invention also comprises is poor according to the same polarity field, three all parameters detect in heteropolarity field difference and four differences of same polarity.
In a kind of specific embodiment, with reference to figure 7, step S1 can comprise: step S101, it is poor to calculate the same polarity field of working as the front court correspondence, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, when being minimum value, enter step S102, otherwise enter step S104 when the described same polarity field of front court correspondence difference; Step S102, calculate when the front court and described before the front court heteropolarity field difference and relatively of at least two place correspondences,, enter step S103, otherwise enter step S104 when front court and its previous field during when described continuously corresponding to two less heteropolarity fields differences; Step S103, calculate when front court and described when front court four differences of same polarity and the comparison of at least two place correspondences before, when described when four differences of front court same polarity much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Step S104 is when the front court is drop-down of standard 2-2.
Because the computational process of four differences of same polarity is often learnt by calculating further again calculating of same polarity field difference earlier, in general, by verifying when same polarity field, front court difference, is then carried out the checking of four differences of same polarity more earlier.In different specific implementations, the verification step poor to the heteropolarity field can also can be later than the verification step of four differences of same polarity prior to the verification step when same polarity field, front court difference.
In the foregoing description, in a certain order, each parameter is verified and is detected in poor according to the same polarity field respectively successively, heteropolarity field difference and four differences of same polarity, in this case, can make testing result reach higher accuracy, avoid erroneous judgement as much as possible.
When having judged after whether the front court belongs to drop-down duplicate field of 24-1 or the drop-down field of standard 2-2, execution in step S2 is drop-down of drop-down duplicate field of 24-1 or standard 2-2 according to the described front court of working as, and respectively signal is handled.
With reference to figure 8, the present invention also provides a kind of movie mode video signal processing unit 800, at least comprise: detecting unit 810, be used for judging when the front court to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2 according to one of, heteropolarity field difference poor and four differences of same polarity or its combination when the same polarity field of front court correspondence; Signal processing unit 820 is used for the testing result according to detecting unit 810, and signal is handled.
With reference to figure 9, above-mentioned detecting unit 810 comprises at least: detection mode selected cell 801 is used to select that the same polarity field is poor, one of heteropolarity field difference and four differences of same polarity or its combination detect when the front court described, and send the detection mode indicator; Difference computational unit 802 is used for according to the detection mode indicator that comes from detection mode selected cell 801, and the same polarity field of calculating correspondence is poor and/or the heteropolarity field is poor and/or four differences of same polarity; Memory cell 803 is used for the described result of calculation of saved differences computing unit 802; Comparing unit 804 is used for according to the detection mode indicator that comes from detection mode selected cell 801 the described result of calculation in the memory cell 803 being compared.
Wherein, described detection mode can comprise a kind of or its combination in the difference detection of same polarity field, the difference detection of heteropolarity field and four poor detections of same polarity at least.Specifically, described same polarity field difference detects that to be used to the same polarity field of calculating when the front court correspondence poor, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, when being minimum value when the described same polarity field of front court correspondence difference, then working as the front court is the drop-down duplicate field of 24-1, otherwise is drop-down of standard 2-2; Described heteropolarity field difference detect be used to calculate when the front court and described before the front court heteropolarity field of at least two place correspondences poor, when two less heteropolarity fields of continuous appearance are poor, then working as the front court is the drop-down duplicate field of 24-1, otherwise is drop-down of standard 2-2; Four differences of described same polarity detect and are used to calculate when front court and described front court four differences of same polarity of at least two place correspondences before of working as, when described when four differences of front court same polarity all much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1, otherwise is drop-down of standard 2-2.
In a kind of embodiment, when detection mode selected cell 801 selected same polarity field difference to detect, detection mode selected cell 801 sent the instruction that same polarity field difference detects to difference computational unit 802 and comparing unit 804; Then, difference computational unit 802 is obtained corresponding pixel, and at least the first same polarity field difference of setting the place correspondence of number before the front court is calculated; And difference computational unit 802 is stored in the same polarity field difference of each correspondence in the memory cell 803; Then, the instruction that the same polarity field difference that comparing unit 804 is sent according to detection mode selected cell 801 detects, the same polarity field difference that will work as the front court correspondence respectively with described when the front court before each same polarity field difference compare.When poor, when first to set in the number field each pairing same polarity field poor before the front court, during for minimum value, when the front court is the drop-down duplicate field of 24-1, otherwise be the drop-down field of standard 2-2 compared to described when the described same polarity field of front court correspondence.
In another kind of embodiment, when detection mode selected cell 801 selected heteropolarity field difference to detect, detection mode selected cell 801 sent the instruction that heteropolarity field difference detects to difference computational unit 802 and comparing unit 804; Then, difference computational unit 802 is obtained corresponding pixel, and to when the front court and described before the front court heteropolarity field difference of at least two place correspondences calculate; And difference computational unit 802 is stored in the heteropolarity field difference that is obtained in the memory cell 803; Then, the instruction that the heteropolarity field difference that comparing unit 804 is sent according to detection mode selected cell 801 detects, the heteropolarity field that will work as front court and its previous field correspondence respectively is poor, respectively with described work as the front court before each same polarity field difference compare.When front court and its previous field during, when the front court is the drop-down duplicate field of 24-1, otherwise be the drop-down field of standard 2-2 continuously corresponding to two less heteropolarity fields differences.
In another embodiment, when detection mode selected cell 801 selected four differences of same polarity to detect, detection mode selected cell 801 sent the instruction that four differences of same polarity detect to difference computational unit 802 and comparing unit 804; Then, difference computational unit 802 is obtained corresponding pixel, and to when the front court and described before the front court four differences of same polarity of at least two place correspondences calculate; And difference computational unit 802 is stored in four differences of same polarity that obtained in the memory cell 803; Then, the instructions that four differences of the same polarity that comparing unit 804 is sent according to detection mode selected cell 801 detect, the same polarity field difference that will work as the front court correspondence respectively with described when the front court before each same polarity field difference compare.When described when four differences of front court same polarity all much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, when the front court is the drop-down duplicate field of 24-1, otherwise be the drop-down field of standard 2-2.
In addition, with reference to Figure 10, in other execution mode of the processing unit of movie mode video signal of the present invention, detection mode selected cell 801 also can comprise assembled unit 901, be used for the difference detection of same polarity field, heteropolarity field difference are detected and four poor one or more that detect of same polarity, be provided with predefined procedure, to form described detection mode.
Wherein, described predefined procedure comprise that the same polarity field is poor, one or more the putting in order arbitrarily of combination in any in heteropolarity field difference and four differences of same polarity.Specifically, comprise when simultaneously that the same polarity field is poor, when heteropolarity field difference and four of same polarities differ from three kinds of detecting units, that described predefined procedure can comprise is poor according to the same polarity field, the heteropolarity field differs from and the order of four differences of same polarity detects successively.In other embodiments, the detection of described heteropolarity field difference can detect prior to described same polarity field difference, also can be later than the order of four differences of described same polarity; Four differences of described same polarity also can detect prior to same polarity field difference.
The respective embodiments described above of the present invention, make full use of between frame and the frame and split by frame data the field that obtains with between the rule of pixel variation, poor according to the same polarity field corresponding with the drop-down duplicate field of 24-1, and/or heteropolarity field difference and and/or four differences of same polarity, compared to be adjacent or the pairing same polarity of dependent field field poor, and/or heteropolarity field difference and and/or four differences of same polarity between the size variation relation, by simple calculating and comparison, obtain reliable result, realized effectively from standard 2-2 is drop-down and the differentiation of the duplicate field that 24-1 is drop-down, thereby avoided faulty operation and the emergence that brings thus that wrong identification brings or jumped out the phenomenon that film mode etc. makes the movie quality deterioration, improved the play quality of movie mode video signal greatly.
Though the present invention by the preferred embodiment explanation as above, these preferred embodiments are not in order to limit the present invention.Those skilled in the art without departing from the spirit and scope of the present invention, should have the ability various corrections and additional are made in this preferred embodiment, and therefore, protection scope of the present invention is as the criterion with the scope of claims.
Claims (15)
1. a movie mode video signal processing method is characterized in that, comprises at least:
According to one of, heteropolarity field difference poor and four differences of same polarity or its combination, judge describedly to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2 when the front court when the same polarity field of front court correspondence;
According to described type, signal is handled when the front court.
2. movie mode video signal processing method as claimed in claim 1, it is characterized in that, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: it is poor to calculate described same polarity field of working as the front court correspondence, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, when described described same polarity field difference when the front court correspondence is minimum value, then described when the front court be the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
3. movie mode video signal processing method as claimed in claim 2 is characterized in that, the described first setting number is any natural number among the 9-24.
4. movie mode video signal processing method as claimed in claim 3 is characterized in that, the described first setting number is 10.
5. movie mode video signal processing method as claimed in claim 1, it is characterized in that, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: calculates described when the front court and described before the front court heteropolarity field of at least two place correspondences poor and compare, when described when front court and its previous field during continuously corresponding to two less heteropolarity fields differences, then described when the front court be the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
6. movie mode video signal processing method as claimed in claim 5 is characterized in that, the heteropolarity field difference of described calculating at least two place correspondences when the front court and before working as the front court also relatively comprises:
It is poor to calculate described heteropolarity field when front court and preceding each correspondence thereof;
Described heteropolarity field when front court and previous field thereof is poor, and corresponding with described each place before the previous field of front court respectively heteropolarity field difference compares.
7. movie mode video signal processing method as claimed in claim 5 is characterized in that, the heteropolarity field difference of described calculating at least two place correspondences when the front court and before working as the front court also relatively comprises:
Calculating comprises that at least the heteropolarity field of n field, n-1 field and n-2 field correspondence is poor, and wherein, the n field is the described front court of working as;
The absolute difference of the absolute difference of the heteropolarity field difference of comparison n field and n-1 field and the heteropolarity field difference of n field and n-2 field; When the absolute difference that the absolute difference of the heteropolarity field of n field and n-1 field difference differs from less than the heteropolarity field of n field and n-2 field, then the n field is the drop-down duplicate field of 24-1; Otherwise be drop-down of standard 2-2.
8. movie mode video signal processing method as claimed in claim 1, it is characterized in that, described basis is poor when the same polarity field of front court correspondence, one of heteropolarity field difference and four differences of same polarity or its combination are judged and comprised: calculates described when the front court and describedly work as front court four differences of same polarity and the comparison of at least two place correspondences before, when described when four differences of front court same polarity much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
9. movie mode video signal processing method as claimed in claim 8, it is characterized in that, described calculating described when the front court and before the front court at least two place correspondences four differences of same polarity and comprise more further: four differences of same polarity of calculating a correspondence behind the front court, when described when four differences of same polarity of one behind the front court much larger than described when four of arbitrary pairing same polarities are poor in two fields before the front court, then working as the front court is the drop-down duplicate field of 24-1; Otherwise, when the front court is drop-down of standard 2-2.
10. movie mode video signal processing method as claimed in claim 1 is characterized in that, described basis is poor when the same polarity field of front court correspondence, the heteropolarity field differs from and one of four differences of same polarity or its combination are judged and comprised:
It is poor to calculate described same polarity field when the front court correspondence, it first is set a number same polarity field difference that the field is corresponding and compare before the front court with described, be minimum value when described same polarity field when the front court correspondence is poor, proceed the detection of heteropolarity field difference, otherwise the described front court of working as is drop-down of standard 2-2;
Calculate described when the front court and described before the front court heteropolarity field difference and relatively of at least two place correspondences, when described when front court and its previous field during continuously corresponding to two less heteropolarity fields differences, proceed the detection of four differences of same polarity, otherwise the described front court of working as is drop-down of standard 2-2;
Calculate described when front court and described when front court four differences of same polarity and the comparison of at least two place correspondences before, when described four differences of same polarity when the front court correspondence much larger than described when four of arbitrary pairing same polarities in two fields before the front court are poor, then described when the front court be the drop-down duplicate field of 24-1, otherwise described when the front court be that standard 2-2 is drop-down.
11. as each described movie mode video signal processing method among the claim 8-10, it is characterized in that, described when four differences of front court same polarity much larger than described before the front court in two fields four differences of arbitrary pairing same polarity comprise, described when four differences of front court same polarity be described before the front court in two fields three times of four differences of arbitrary pairing same polarity, or surpass described in two fields before the front court more than three times of four differences of arbitrary pairing same polarity.
12. a movie mode video signal processing unit is characterized in that, comprises at least:
Detecting unit is used for according to one of, heteropolarity field difference poor when the same polarity field of front court correspondence and four differences of same polarity or its combination, judges describedly to be the drop-down duplicate field of 24-1 or to be the drop-down field of standard 2-2 when the front court;
Signal processing unit is used for the testing result according to described detecting unit, and signal is handled.
13. movie mode video signal processing unit as claimed in claim 12 is characterized in that, described detecting unit comprises at least:
The detection mode selected cell is used to select that the same polarity field is poor, one of heteropolarity field difference and four differences of same polarity or its combination detect when the front court described, and send the detection mode indicator;
Difference computational unit is used for according to described detection mode indicator, and the same polarity field of calculating correspondence is poor and/or the heteropolarity field is poor and/or four differences of same polarity;
Memory cell is used to store the result of calculation of described difference computational unit;
Comparing unit is used for according to described detection mode indicator the result of calculation in the described memory cell being compared.
14. movie mode video signal processing unit as claimed in claim 12, it is characterized in that, described detection mode selected cell also can comprise assembled unit, be used for the difference detection of same polarity field, heteropolarity field difference are detected and four poor one or more that detect of same polarity, be provided with predefined procedure, to form described detection mode.
15. movie mode video signal processing unit as claimed in claim 14 is characterized in that, described predefined procedure comprises that the same polarity field is poor, one or more the putting in order arbitrarily of combination in any in heteropolarity field difference and four differences of same polarity.
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