CN101087439A - A method, device and display for detecting TV and film signals - Google Patents
A method, device and display for detecting TV and film signals Download PDFInfo
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Abstract
The invention discloses a method of detecting TV set film signal which comprises following steps: calculate separating filed absolute difference of filed signal, and obtain detecting sequence of 3:2 transformation based on separating filed absolute difference; at the same time calculate adjacent filed absolute difference of filed signal, obtain detecting sequence of 2:2 transformation based on adjacent filed absolute difference; if said detecting sequence of 3:2 transformation fulfills 3:2 transformation standard detecting sequence, switches to TV set film interleaving mode of 3:2 transformation, if said detecting sequence of 2:2 transformation fulfills 2:2 transformation standard detecting sequence, switches to TV set film interleaving mode of 2:2 transformation. The invention also puts forwards a device and display which detects TV set film signal. The invention can increase detecting precision of TV set film signal.
Description
Technical field
The present invention relates to image processing field, particularly a kind of method, device and display that detects TV set film signal.
Background technology
The telecine technology is a method of utilizing the field to duplicate, the movies signals of lining by line scan of 24 frame/seconds is converted to interleaved 60/second with (the NationalTelevision System Committee of NTSC, NTSC) Ming Ming colour television standard TV signal or 50 s'/second line-by-line inversion (Phase Alternation Line, PAL) colour television standard TV signal, thereby realized on normal interlaced scanning TV, watching the requirement of the movie program of lining by line scan, but the quality of picture also drops to the level of normal interlaced scanning TV signal.
Continual renovation along with TV tech, the HD digital TV of lining by line scan begins to popularize, when progressive-scan tv is watched interleaved non-TV set film signal, need at first interlaced video signal is converted to progressive-scan video signal, this is called as the release of an interleave technology.In order to make TV set film signal on progressive-scan tv, obtain best visual effect, best method is to detect the TV set film signal that may comprise in the vision signal of television reception, and the film mode by release of an interleave is reduced to movies signal with TV set film signal again.Yet in actual applications, the video flowing of the scan video of normal interlaced often stream, telecine video flowing and other kinds of need handling interts the mixed video stream that forms mutually, needs to adopt corresponding release of an interleave pattern for the interlaced scanning video stream of each type wherein.Therefore need detect in real time mixed video stream, so that accurately detect the TV set film signal that may comprise in the vision signal of television reception, again video data is carried out the seamless spliced interlacing processing of going, this technology that detects TV set film signal in mixed video stream is called as the TV set film signal digital detecting technique.
The basic structure of the existing device that is used to detect TV set film signal as shown in Figure 1.This field data that absolute difference computation device 102 calculates by the outside input reaches the absolute difference sum (SAD) of the preceding field data same position of being imported by memory 101 or calculates so-called motion vector; Result of calculation is sent to comparison detector 103; Compare detector 103 according to absolute difference sum or motion vector calculation absolute change amount, and absolute change amount between continuous field is quantified as one group of field sequential value input film mode determining device 104; Film mode determining device 104 will compare from the field sequential value and the pattern field sequential value that compare detector 103, judge according to comparative result whether the picture signal of input is film mode.Fig. 2 is the calculating principle schematic of absolute difference computation device 102.The data value of the every pixel representative of coded representation in the diagram lattice.Absolute difference sum (SAD), be exactly resolution be absolute difference between the field of pixel on adjacent two same positions of m * n, promptly ask
Said method is the various schemes on basis, generally can judge the TV set film signal in the television video transmission signals, but deficiencies such as accuracy is not high, low-response, treatment of details difference are all being arranged in varying degrees.Reason mainly contains following two aspects:
One, shortage is to the statistics and the analysis of absolute difference.
Absolute difference is a most important basis for estimation in the film mode testing process, and can accurately gather, analyse in depth be one of key point of film mode detection accuracy.The prior art scheme is handled simple to absolute difference, to simple summation of absolute difference or absolute difference weighted sum, data source is not carried out more deep analysis, statistics as only, also just can't draw more accurate analysis result.
Two, do not have careful analysis 3:2 conversion (pulldown) and the characteristics that 2:2 changes, carry out differentiated treatment.
The 3:2 conversion is two kinds of different TV set film signal patterns with the 2:2 conversion, and difference is very big.Prior art is often adopted in a like fashion and is detected, and does not adopt the relevant detection mode at its characteristics, causes accuracy of detection not ideal enough.
Three, there is not careful analysis film mode standard sequence
3:2 pulldown and 2:2 pulldown television movie mode show that numercal notable feature is its standard sequence group, and it is the numeral flag of television movie mode, ignore or it is analyzed not carefully will directly have influence on the sensitivity that scene is switched.
Summary of the invention
The embodiment of the invention proposes a kind of method that detects TV set film signal, can improve the accuracy that detects TV set film signal.This method comprises the steps:
The calculated field signal every the field absolute difference, obtain the detection sequence of 3:2 conversion every the field absolute difference according to gained; An adjacent absolute difference of while calculated field signal obtains the detection sequence that 2:2 changes according to the adjacent absolute difference of gained;
Judge that gained detects sequence and whether meets corresponding standard detection sequence, if then switch to the release of an interleave pattern of corresponding TV set film signal.
The embodiment of the invention also proposes a kind of device that detects television movie mode, comprising:
Signal storage is used for the field signal of n field, n+1 field and the n+2 field of storage order input, and the field signal of being stored is sent to the absolute difference computation device; The line synchronizing signal of described field signal and row synchronizing signal are sent to ranks reach the absolute difference control unit synchronously;
Ranks reach the absolute difference control unit synchronously, are used for according to line synchronizing signal and the row synchronizing signal from the signal storage that are received, calculate the ranks value; According to the detection configuration parameter that sets in advance, send absolute difference computation control enable signal SAD_EN to the absolute difference computation device; Judge that according to the ranks value of being calculated whether the current pixel coordinate is the pixel coordinate that last needs detects in the image, sends statistical computation enable signal STA_EN according to judged result to the absolute difference computation device;
The absolute difference computation device, be used for calculating every a field absolute difference and an adjacent absolute difference, and gained is sent to sequential detector every a field absolute difference and an adjacent absolute difference according to absolute difference computation control enable signal SAD_EN, statistical computation enable signal STA_EN and the field signal received;
Sequential detector is used for being exported 3:2 transition detection sequence according to what receive every the field absolute difference, according to adjacent the absolute difference output 2:2 transition detection sequence of being received;
The film mode determining device is used for judging according to the 3:2 transition detection sequence of sequential detector output whether field signal is 3:2 conversion TV set film signal; Judge according to the 2:2 transition detection sequence of sequential detector output whether field signal is 2:2 conversion TV set film signal, and judged result is sent to the scene switch unit;
The scene switch unit is used for the judged result according to the output of film mode determining device, carries out the mutual switching between 3:2 conversion release of an interleave pattern, 2:2 conversion release of an interleave pattern and other release of an interleave patterns.
The embodiment of the invention also proposes a kind of display, comprises the TV set film signal detecting unit, release of an interleave unit and display unit;
Described TV set film signal detecting unit is used to receive interleaved signal, detects the television movie mode of described interleaved signal, exports corresponding release of an interleave mode indication signal according to testing result, specifically comprises:
Signal storage is used for the field signal of n field, n+1 field and the n+2 field of storage order input, and the field signal of being stored is sent to the absolute difference computation device; The line synchronizing signal of described field signal and row synchronizing signal are sent to ranks reach the absolute difference control unit synchronously;
Ranks reach the absolute difference control unit synchronously, are used for according to line synchronizing signal and the row synchronizing signal from the signal storage that are received, calculate the ranks value; According to the detection configuration parameter that sets in advance, send absolute difference computation control enable signal SAD_EN to the absolute difference computation device; Judge that according to the ranks value of being calculated whether the current pixel coordinate is the pixel coordinate that last needs detects in the image, sends statistical computation enable signal STA_EN according to judged result to the absolute difference computation device;
The absolute difference computation device, be used for calculating every a field absolute difference and an adjacent absolute difference, and gained is sent to sequential detector every a field absolute difference and an adjacent absolute difference according to absolute difference computation control enable signal SAD_EN, statistical computation enable signal STA_EN and the field signal received;
Sequential detector is used for being exported 3:2 transition detection sequence according to what receive every the field absolute difference, according to adjacent the absolute difference output 2:2 transition detection sequence of being received;
The film mode determining device is used for judging according to the 3:2 transition detection sequence of sequential detector output whether field signal is 3:2 conversion TV set film signal; Judge according to the 2:2 transition detection sequence of sequential detector output whether field signal is 2:2 conversion TV set film signal, and judged result is sent to the scene switch unit;
The scene switch unit is used for the judged result according to the output of film mode determining device, carries out the mutual switching between 3:2 conversion release of an interleave pattern, 2:2 conversion release of an interleave pattern and other release of an interleave patterns, and exports corresponding release of an interleave mode indication signal;
Described release of an interleave processing unit is used to receive interleaved field signal, and from the release of an interleave mode indication signal of scene switch unit, according to described release of an interleave mode indication signal, the field signal that receives is carried out the release of an interleave of corresponding modes and handle, the output progressive-scan signal;
Described display unit then is used to show described progressive-scan signal.
As can be seen from the above technical solutions, the embodiment of the invention has following technique effect:
One, adopt more careful absolute difference statistical and analytical method, because the n field is identical with n+2 field polarity, promptly be all odd field or even field, calculate the absolute difference of same coordinate pixel between the identical play of polarity, result calculated is more accurate like this;
Two, to the TV set film signal differentiating and processing of 3:2 conversion and 2:2 conversion, calculate the detection sequence of these two kinds of television movie modes respectively, the 3:2 transition detection sequence and the standard 3:2 transition detection sequence that calculate are compared, the 2:2 transition detection sequence and the standard 2:2 transition detection sequence that calculate are compared, computational methods are pointed like this, so accuracy rate is higher.
Description of drawings
Fig. 1 is the TV set film signal checkout gear block diagram of prior art;
Fig. 2 is the schematic diagram calculation of the absolute difference computation device in the TV set film signal checkout gear shown in Figure 1;
Fig. 3 is a 3:2 transfer principle schematic diagram;
Fig. 4 is a 2:2 transfer principle schematic diagram;
Fig. 5 is for detecting the schematic diagram of 3:2 conversion TV set film signal;
Fig. 6 is for detecting the schematic diagram of 2:2 conversion TV set film signal;
Fig. 7 is the device block diagram of the detection television movie mode of the embodiment of the invention;
Fig. 8 pays close attention to the schematic diagram of scope for human eye;
Fig. 9 judges state transition graphs for continuous 10 detection sequences in the detection of 3:2 conversion television movie mode;
Figure 10 detects the general flow chart of television movie mode for the present invention;
Figure 11 detects the flow chart of 3:2 conversion television movie mode for the present invention;
Figure 12 detects the flow chart of 2:2 conversion television movie mode for the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below the 3:2 conversion of telecine technology and the principle of 2:2 conversion are done simply to introduce.
Cinefilm is to play with the speed of per second 24 frames, and for interleaved television set, when using the TSC-system formula, television set is play with the speed of 60 of per seconds, in the pal mode color television standard that China adopts, television set is play with the speed of 50 of per seconds.Therefore the picture signal of former cinefilm must be converted into the signal format that television standard can transmit broadcast.
Movies signal is converted into the TSC-system formula TV set film signal 3:2 conversion schematic diagram as shown in Figure 3, the box indicating movies signal frame of band letter, the field signal of the TV that the box indicating of band letter and number is split into by the frame signal of film, white background is represented odd field, represents even field at the bottom of the oblique line.A, B, C, D, E are the moving-picture frame of playing continuously, during conversion, frame A are splitted into field A1 that comprises all odd-numbered line pixels of frame A and the field A2 that comprises all even number line pixels of frame A; Frame B is splitted into field B1 that comprises all odd-numbered line pixels of frame B and the field B2 that comprises all even number line pixels of frame B, and field B1 is copied as a B1 ' be placed on after the B2; Frame C is splitted into field C1 that comprises all even number line pixels of frame C and the field C2 that comprises all odd-numbered line pixels of frame C; Frame D is splitted into field D1 that comprises all even number line pixels of frame D and the field D2 that comprises all odd-numbered line pixels of frame D, and field D1 is copied as a D1 ' be placed on after the D2.Then adopt the processing of similar frame A for frame E, then the rest may be inferred afterwards, and the continuous movies signal of per 4 frames is converted to 10 continuous TV signal.
Movies signal is converted into pal mode TV set film signal 2:2 conversion schematic diagram as shown in Figure 4, wherein the implication of each symbol is consistent with Fig. 3.During conversion, frame A is splitted into field A1 that comprises all odd-numbered line pixels of frame A and the field A2 that comprises all even number line pixels of frame A,, all handle in such a manner for each frame thereafter.24 frames/second playback rate the frequency multiplication that is equivalent to like this film is 48 times/second, and when playing with 50/second speed with pal mode, the speed ratio cinema that televises is fast 1/24, but does not influence viewing effect.
The TV set film signal detection technique specifically, is exactly whether the data flow that detects TV signal in real time exists the rule that 3:2 changes or 2:2 changes.
The principle that the embodiment of the invention detects 3:2 conversion TV set film signal as shown in Figure 5, top line is the moving-picture frame signal with time-sequencing, represents with A, B, C, D respectively; Below with it same column be the field signal that comes from this moving-picture frame, numeral 1,2 wherein is used to distinguish different that come from same frame signal, B1 ' is the duplicate field of B1.To go up two correspondence position pixel adjacent and that parity is identical time and subtract each other, for example an A1 subtracts each other with a B1, and a B2 and a C1 subtract each other, and the absolute value of difference is the pixel absolute difference.Be the convenience on calculating and storing, (Threshold1 Th1) relatively, if more than or equal to threshold value Th1, then is expressed as 1 with this pixel absolute difference with the threshold value 1 that sets in advance with gained pixel absolute difference; If less than threshold value Th1, then this pixel absolute difference is expressed as 0.Owing to 3:2 conversion film mode feature is, the 3rd of strange field is identical with the 5th in continuous ten field data, and the 8th of idol field is identical with the 10th, so the obvious characteristic with 11110 circulations can appear in the expression value sequence of gained pixel absolute difference.If find to exist such feature, then decidable is a 3:2 conversion TV set film signal.
The principle that the present invention detects 2:2 conversion TV set film signal as shown in Figure 6.Different with 3:2 conversion regime detection principle, the film mode of 2:2 conversion does not have identical duplicate field.But because the parity field that splits into of same frame is in identical time point in time, its similitude is greater than the similitude of the parity field that non-same frame splits into.So the absolute difference that the odd even that splits out of same frame is two is less than the absolute difference of the parity field that non-same frame splits into, promptly the absolute difference of two of A1 and A2 is less than the absolute difference of two of A2 and B1.If calculate adjacent arbitrarily n field and the absolute difference between the n+1 field, gained absolute difference and benchmark thresholding are compared, if absolute difference then is expressed as 1 greater than the benchmark thresholding, otherwise be expressed as 0, obtain the expression value sequence of pixel absolute difference.If described expression value sequence presents small one and large one pattern that alternately occurs, promptly 01010101 shape can be judged to be the 2:2 film mode.
According to above-mentioned principle, the device of the detection television movie mode of the embodiment of the invention as shown in Figure 7, thick arrow is represented vision signal, thin arrow is represented the signal except that vision signal, this device comprises as the lower part:
Ranks reach absolute difference control unit 720 synchronously, are used for according to line synchronizing signal Hs and the row synchronizing signal Vs from the signal storage 710 that are received, calculate the ranks value; Regional selection function is provided, its specific practice can for: the surveyed area of different brackets is set, and is provided with and the corresponding detection density value of surveyed area of each grade; With described surveyed area with detect density value as detecting configuration parameter, according to described detection configuration parameter generate absolute difference computation control enable signal SAD_EN and statistical computation enable signal STA_EN and export in the absolute difference computation device 730 every field absolute difference analytic unit 731 and adjacent absolute difference analytic unit 732.Wherein, the assignment rule of SAD_EN is: according to described detection configuration parameter, judging whether the current pixel coordinate is the pixel coordinate that need detect, if then SAD_EN is 1, otherwise is 0.The assignment rule of STA_EN is: judging according to the coordinate of pixel whether current pixel is the pixel that last needs in the image detect, if STA_EN is 1, otherwise is 0.
Because the concern of human eye is limited in scope, the most concern scopes of human eye only concentrate near the zone of image golden section point for sign of w * h, showing that as Fig. 8 the zone of intermediate mesh pattern representative, this scope only account for the about 1/3 of entire image area, is the key area of video image.The present invention program around this principle promptly, image is divided into key area and non-key area, and be provided with than high detection density in the key area, so not only can save computational resource, also can reduce to influence the accuracy of detection greatly owing to the interference of non-key area.
Absolute difference computation device 730 comprises every the field absolute difference analytic unit 731 and the absolute difference analytic unit 732 of coming personally.Wherein,, be used to calculate ranks and reach the specified n field of the absolute difference computation control enable signal SAD_EN of absolute difference control unit 720 and the capable t row of the s pixel D of n+2 field synchronously at 3:2 conversion TV set film signal sequence every field absolute difference analytic unit 731
n(s, t) and D
N+2(s, absolute difference SAD t) (s, t)=| D
n(s, t)-D
N+2(s, t) |.In field absolute difference analytic unit 731, also comprise: the register, comparator, counter and the output control unit that are used to dispose noise gate.Described comparator is used for that (s t) compares with the noise gate that is provided with in the described register, and (s, t) greater than described noise gate, then the count value of counter is from adding 1, otherwise Counter Value is constant as SAD with gained pixel absolute difference SAD.Described output control unit is used for receiving and counting and calculates enable signal STA_EN, learn according to this signal and to handle two all pixel absolute differences every the field, the value of this hour counter be n field and n+2 field every the field absolute difference, then the count value in the output control unit output counter is to sequential detector 740, and this counter is made zero.
Adjacent absolute difference analytic unit 732 is at 2:2 conversion TV set film signal sequence, be used to calculate the pixel absolute difference SAD ' that ranks reach specified n field of the absolute difference computation control enable signal SAD_EN of absolute difference control unit 720 and n+1 field synchronously (s, t)=| D
n(s, t)-D
N+1(s, t) |.Also comprise in adjacent the absolute difference analytic unit 732: the register, comparator, counter and the output control unit that are used to dispose noise gate.Described comparator is used for described pixel absolute difference is compared with described noise gate, and (s, t) greater than described noise gate, then the count value of described counter is from adding 1, otherwise Counter Value is constant to work as SAD '.Described output control unit is used for receiving and counting calculating enable signal STA_EN and learns that according to this signal handling adjacent two places has the pixel absolute difference, the value of this hour counter is exactly the absolute difference of n field and n+1 field, then the count value in the output control unit output counter is to sequential detector 740, and this counter is made zero.Wherein, every field absolute difference analytic unit 731 can with adjacent absolute difference analytic unit 732 shared same comparator, register and/or output control units physically.
Specifically, 3:2 Sequence Detection unit 741 receives count results every field absolute difference analytic unit 731 promptly every the field absolute difference, the sequential value that output is corresponding, the rule of output sequence value is: for continuous 5 minimum in the absolute difference of field output sequence values is 0, for other count results then the output sequence value be 1.Every generation 10 bit sequence values, then described 10 bit sequence values are formed binary number, and add the parity field sign in the highest order of this binary number, 11 bits that constituted are defined as 3:2 conversion television movie mode and detect sequence SEQ32[10:0] an element.Binary 3:2 conversion television movie mode standard detection sequence SEQ32_STD[10:0] (1,2,3...10) be: 10111101111,01111011110,11110111101,01101111011,11011110111,00111101111,11111011110,01110111101,11101111011,01011110111, wherein a high position is fixed as parity field sign position; Being converted into 16 system data is 5EF, 3DE, 7BD, 3FB, 6F7,1EF, 7DE, 3BD, 77B, 2F7.In addition, erroneous judgement appears when preventing that still frame from appearring in TV set film signal, further comprise static thresholding judging unit in the 3:2 Sequence Detection unit 741, be used to judge current whether be in 3:2 conversion release of an interleave pattern and current every the field absolute difference less than static thresholding, if then equal 3:2 conversion television movie mode standard detection sequence SEQ32_STD[10:0 on the 3:2 Sequence Detection unit 741 output numerical value] the detection sequence.
2:2 Sequence Detection unit 742 receives the adjacent absolute difference that adjacent absolute difference analytic unit 732 calculates.This module is provided with gain coefficient M, and giving tacit consent to initial output sequence value is 0.If a last sequential value is 0, then this a neighbour absolute difference needs greater than last one adjacent absolute difference M times that just to put the current sequence value be 1 otherwise put 0; If a last sequential value is 1, then this a neighbour absolute difference needs less than last one adjacent absolute difference M times that just to put the current sequence value be 0 otherwise put 1.Write down nearest continuous 8 bit sequence values, and, generate 2:2 conversion television movie mode and detect sequence SEQ22[7:0 in highest order interpolation parity field sign], its standard generic sequence SEQ22_STD[7:0] (1,2) be 10101010,01010101, being converted into 16 system data is AA, 55.In addition, this unit comprises static thresholding judging unit, is used to judge currently whether be in 2; 2 conversion release of an interleave patterns and current adjacent absolute difference are less than static thresholding, if then equal 2:2 conversion television movie mode standard detection sequence SEQ22_STD[7:0 on the 2:2 Sequence Detection unit 742 output numerical value] the detection sequence.
Film mode determining device 750, comprise 3:2 film mode judging unit 751 and 2:2 film mode judging unit 752, be respectively applied for the detection sequence of being exported according to sequential detector 740, whether the interleaved signal of judging this device of input is 3:2 conversion TV set film signal or 2:2 conversion TV set film signal, generates the television movie mode index signal and is sent to scene switch unit 760 according to judged result.
Specifically, 3:2 film mode judging unit 751 will be from the detection sequence SEQ32[10:0 of 3:2 Sequence Detection unit 741] order and standard sequence SEQ32_STD[10:0] (1,2,3..10) relatively calculate one by one.Figure 9 shows that continuous 10 are detected sequence judgement state transition graph.Under initial condition S_0,3:2 conversion television movie mode index signal film_en32 is set to low (promptly this index signal film_en32 is invalid, shows that current interlacing scan field signal is not the TV set film signal of 3:2 conversion).With 3:2 transition detection sequence SEQ32[10:0] with the 3:2 transfer standard detect the sequence first number 5EF by turn with or after summation again, if summed result TM is less than 11, then still remain the S_0 state, and maintenance 3:2 conversion television movie mode index signal film_en32 is low; If summed result TM is 11 o'clock, show that the current detection sequence is identical with standard detection sequence initial value, 3:2 conversion television movie mode index signal film_en32 is set for high (promptly this index signal film_en32 is effective, shows that current interlacing scan field signal is the TV set film signal of 3:2 conversion) and enter the Sequence Detection process and play primary state S_5EF.After this order by the standard sequence array relatively detects sequence code SEQ32[10:0] and standard sequence SEQ32_STD[10:0] (1,2,3..10), with the standard sequence group carry out by turn with or after again the result of calculation TM that obtains of summation equal 11, think that input traffic still is 3:2 conversion television movie mode, and be converted to the next state of Sequence Detection process, put the film_en32 signal for high.In any one state of Sequence Detection process, if result of calculation TM less than 11 then to put the film_en32 signal be low, then returns initial condition S_0.When rest image occurring in the TV set film signal since in the 3:2 Sequence Detection unit 741 according to the judgment rule outputting standard sequence SEQ32_STD[10:0 of static thresholding], then the film_en32 signal still remains height.
If in the 3:2 Sequence Detection unit 741 static thresholding is not set, then when rest image occurring in the TV set film signal, 3:2 film mode judging unit 751 will receive to be 0 detection sequence continuously.In this case, be the correctness that guarantees to detect, can in 3:2 film mode judging unit 751, introduce auxiliary rest image detecting unit: be used for when the appearance of detection sequence is 0 situation continuously,, then still keep the film_en32 signal to be height if the film_en32 signal is high.
The principle of 2:2 film mode judging unit 752 and processing procedure and 3:2 film mode judging unit 751 are identical, and just standard sequence is different, and the television movie mode index signal of this unit output is film_en22.Its standard generic sequence SEQ22_STD[7:0] (1,2) be the array circulation of (AA, 55), data are got 8 significance bits.
3:2 index signal counting unit is used for the film_en32 signal is counted for high number continuously, obtains count results CNT_film32; Perhaps the film_eh32 signal is counted for low number continuously, obtained count results UCNT_film32.Wherein, count results CNT_film32 has shown the number of 3:2 conversion TV set film signal field continuous in the current interleaved signal; Count results UCNT_film32 shows the number of non-3:2 conversion TV set film signal field continuous in the current interleaved signal.
2:2 index signal counting unit is used for the film_en22 signal is counted for high number continuously, obtains count results CNT_film22; Perhaps the film_en22 signal is counted for low number continuously, obtained count results UCNT_film22.
Current when being non-TV set film signal release of an interleave pattern, if CNT_film32, then switches to 3:2 conversion release of an interleave pattern greater than the incision threshold value THR1_film that sets in advance; If CNT_film22, then switches to 2:2 conversion release of an interleave pattern greater than incision threshold value THR1_film.
When if current release of an interleave pattern is 3:2 conversion release of an interleave pattern, then, then switch to the release of an interleave pattern of non-TV set film signal if UCNT_film32 cuts out threshold value THR2_film greater than what set in advance; When if current release of an interleave pattern is 2:2 conversion release of an interleave pattern, then, then jump out the release of an interleave pattern of 2:2 conversion if UCNT_film22 cuts out threshold value THR2_film greater than what set in advance, switch to the release of an interleave pattern of non-TV set film signal.The reason that scene switch unit 760 carries out above-mentioned design is that TV set film signal may exist bad that does not meet standard sequence in editing process, if, may occur because bad existence causes unnecessary handoff procedure once finding that the detection sequence does not meet standard sequence and switches.Above-mentioned scene switch unit 760 switches to certain release of an interleave pattern, in fact is exactly the index signal of scene switch unit 760 these release of an interleave patterns of output.
The display of the embodiment of the invention also comprises release of an interleave processing unit and display unit except comprising above-mentioned TV set film signal detecting unit;
Described release of an interleave processing unit is used to receive interleaved field signal, and the field signal that this field signal and TV set film signal detecting unit receive is synchronous; The release of an interleave processing unit also receives the release of an interleave mode indication signal from the scene switch unit, according to described release of an interleave mode indication signal, the field signal that receives is carried out the release of an interleave of corresponding modes and handles, the output progressive-scan signal;
Described display unit then is used to show described progressive-scan signal.
In the embodiment of the invention, carry out the detection of the television movie mode and the television movie mode that 2:2 changes of 3:2 conversion simultaneously, its realization flow comprises the steps: as shown in figure 10
Step 1001: calculate input field signal every the field absolute difference, obtain the detection sequence SEQ32[10:0 of 3:2 conversion every the field absolute difference according to gained]; Calculate an adjacent absolute difference of the field signal of input simultaneously, obtain the detection sequence SEQ22[7:0 of 2:2 conversion according to the adjacent absolute difference of gained];
Step 1002: judge that gained detects sequence SEQ32[10:0] or SEQ22[7:0] whether meet corresponding standard detection sequence, if then switch to the release of an interleave pattern of corresponding TV set film signal, otherwise jump out the release of an interleave pattern of TV set film signal.
Wherein, the detection step of the television movie mode of 3:2 conversion comprises the steps: as shown in figure 11
Step 1101: the absolute difference of the same coordinate in the n field of calculating input and the field signal of n+2 field and the pixel of coincidence detection configuration parameter, judge that whether the gained absolute difference is greater than the noise gate that sets in advance, if then the pixel absolute difference count value of this coordinate is 1, otherwise is 0; With described two all pixel absolute difference count values summations, obtain described two every the field absolute difference; N is the sequence number of field signal;
Step 1102: obtain the detection sequence that 3:2 changes according to described every the field absolute difference, the rule of generation comprises:
Continuous 5 minimum in the absolute difference of field output sequence values are 0, for other every the field absolute difference then the output sequence value be 1;
Every generation 10 bit sequence values are then formed binary number with described 10 bit sequence values, add the parity field sign in the highest order of this binary number, and described binary data is converted to 16 system data as an element that detects in the sequence;
Resulting element is arranged in order the detection sequence SEQ32[10:0 that obtains the 3:2 conversion].
The rule that generate to detect sequence can further include: if current release of an interleave pattern is in 3:2 conversion release of an interleave pattern, and every the field absolute difference less than the static thresholding that sets in advance, then export and equal the detection sequence that the 3:2 transfer standard detects sequence on the numerical value.
Step 1103: relatively gained detects sequence set SEQ32[10:0] with standard detection sequence set SEQ32_STD[10:0], the sequential value in detecting sequence set is " 1F ", when promptly identical with first sequential value in the standard detection sequence set, enters detected state;
Step 1104: will detect sequence set SEQ32[10:0] sequential value and standard detection sequence set SEQ32_STD[10:0] sequential value compare successively, when the number of times CNT_film32 that meets mutually continuously reaches incision threshold value THR1_film, be judged to be 3:2 conversion television movie mode, switch to the release of an interleave pattern of 3:2 conversion;
Step 1105: will detect sequence set SEQ32[10:0] sequential value and standard detection sequence set SEQ32_STD[10:0] sequential value compare successively, when the number of times UCNT_film32 that is not inconsistent continuously reaches when cutting out threshold value THR2_film, jump out the release of an interleave pattern of 3:2 conversion.
The detection step of the television movie mode of 2:2 conversion comprises the steps: as shown in figure 12
Step 1201: calculating the absolute difference of the pixel of same coordinate in n field and the n+1 field and coincidence detection configuration parameter, whether judge the gained absolute difference greater than the noise gate that sets in advance, if then the pixel absolute difference count value of this coordinate is 1, otherwise is 0; All pixel absolute difference count value summations with described two obtain described two an adjacent absolute difference; N is the sequence number of field signal;
Step 1202: adopt dynamic threshold formation sequence value according to the gained absolute difference, the rule of generation comprises: setting in advance gain coefficient M and homing sequence value is 0;
If a last output valve is 0, then to need M greater than a last absolute difference doubly just put the current sequence value be 1 to this absolute difference otherwise put 0; If a last output valve is 1, then to need M less than a last absolute difference doubly just put the current sequence value be 0 to this absolute difference otherwise put 1;
Every generation 8 bit sequence values are then formed binary number with described 8 bit sequence values, add the parity field sign in the highest order of this binary number, and described binary number is converted to 16 system numbers as an element that detects sequence;
Resulting element is arranged in order the detection sequence SEQ22[7:0 that obtains the 2:2 conversion];
Step 1203: relatively gained detects sequence set SEQ22[7:0] with standard detection sequence set SEQ22_STD[7:0], the sequential value in detecting sequence set is " AA ", when promptly identical with first sequential value in the standard detection sequence set, enters detected state;
Step 1204: will detect sequence set SEQ22[7:0] sequential value and standard detection sequence set SEQ22_STD[7:0] sequential value compare successively, when the number of times CNT_film22 that meets mutually continuously reaches incision threshold value THR1_film, be judged to be 2:2 conversion television movie mode, switch to the release of an interleave pattern of 2:2 conversion;
Step 1205: will detect sequence set SEQ22[7:0] sequential value and standard detection sequence set SEQ22_STD[7:0] sequential value compare successively, when the number of times UCNT_film22 that is not inconsistent continuously reaches when cutting out threshold value THR2_film, jump out the release of an interleave pattern of 2:2 conversion.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (27)
1, a kind of method that detects TV set film signal is characterized in that, this method comprises the steps:
The calculated field signal every the field absolute difference, according to the described detection sequence that obtains 3:2 conversion every the field absolute difference; An adjacent absolute difference of calculated field signal obtains the detection sequence that 2:2 changes according to a described adjacent absolute difference;
Detect sequence if the detection sequence of described 3:2 conversion meets the 3:2 transfer standard, then switch to the telecine release of an interleave pattern of 3:2 conversion; Detect sequence if the detection sequence of described 2:2 conversion meets the 2:2 transfer standard, then switch to the telecine release of an interleave pattern of 2:2 conversion.
2, method according to claim 1, it is characterized in that, comprising of described calculated field signal: the absolute difference of the same coordinate in the n field of calculating input and the field signal of n+2 field and the pixel of coincidence detection configuration parameter every the field absolute difference, judge that whether the gained absolute difference is greater than the noise gate that sets in advance, if then the pixel absolute difference count value of this coordinate is 1, otherwise is 0; With described two all pixel absolute difference count values summations, obtain described two every the field absolute difference; N is the sequence number of field signal;
Adjacent absolute difference of described calculated field signal comprises: the absolute difference of calculating the pixel of same coordinate in n field and the n+1 field and coincidence detection configuration parameter, judge that whether the gained absolute difference is greater than the noise gate that sets in advance, if then the pixel absolute difference count value of this coordinate is 1, otherwise is 0; All pixel absolute difference count value summations with described two obtain described two an adjacent absolute difference.
3, method according to claim 2 is characterized in that, described detection configuration parameter comprises: surveyed area and the detection density value corresponding with described surveyed area.
4, method according to claim 1 is characterized in that, describedly comprises according to the described detection sequence that obtains 3:2 conversion every the field absolute difference:
Continuous 5 minimum in the absolute difference of field output sequence values are 0, for other every the field absolute difference then the output sequence value be 1;
Every generation 10 bit sequence values are then formed binary number with described 10 bit sequence values, add the parity field sign in the highest order of this binary number, and described binary data is converted to 16 system data as an element that detects in the sequence;
Resulting element is arranged in order the detection sequence that obtains the 3:2 conversion.
5, method according to claim 4 is characterized in that, describedly further comprises according to the described detection sequence that obtains 3:2 conversion every the field absolute difference:
If current release of an interleave pattern is in 3:2 conversion release of an interleave pattern, and every the field absolute difference less than the static thresholding that sets in advance, then export and equal the detection sequence that the 3:2 transfer standard detects sequence on the numerical value.
6, method according to claim 1 is characterized in that, sets in advance gain coefficient M and the homing sequence value is made as 0, and the then described detection sequence that obtains the 2:2 conversion according to adjacent absolute difference of gained comprises:
If a last sequential value is zero, a then current adjacent absolute difference needs that doubly just to put the current sequence value be 1 otherwise put 0 greater than last adjacent absolute difference M; If a last sequential value is 1, a then current adjacent absolute difference needs that doubly just to put the current sequence value be 0 otherwise put 1 less than last adjacent absolute difference M;
Every generation 8 bit sequence values are then formed binary number with described 8 bit sequence values, add the parity field sign in the highest order of this binary number, and described binary number is converted to 16 system numbers as an element that detects sequence;
Resulting element is arranged in order the detection sequence that obtains the 2:2 conversion.
7, method according to claim 6 is characterized in that, describedly further comprises according to the described detection sequence that obtains 2:2 conversion every the field absolute difference:
If current release of an interleave pattern is in 2:2 conversion release of an interleave pattern and an adjacent absolute difference less than the static thresholding that sets in advance, then exports and equal the detection sequence that the 2:2 transfer standard detects sequence on the numerical value.
According to each described method of claim 1 to 7, it is characterized in that 8, described if the detection sequence of described 3:2 conversion meets 3:2 transfer standard detection sequence, the telecine release of an interleave pattern that then switches to the 3:2 conversion comprises:
The number of times that the standard detection sequence that the detection sequence of described 3:2 conversion and 3:2 are changed meets is continuously counted, obtain count value CNT_film32, if described count value CNT_film32 reaches the 3:2 conversion incision threshold value that sets in advance, then switch to 3:2 conversion release of an interleave pattern.
9, method according to claim 8, it is characterized in that, described switching to after the 3:2 conversion release of an interleave pattern, further comprise: the detection sequence of described 3:2 conversion and the continuous incongruent number of times of standard detection sequence of 3:2 conversion are counted, obtain count value UCNT_film32, cut out threshold value if described count value UCNT_film32 reaches the 3:2 conversion that sets in advance, then switch and 3:2 conversion release of an interleave pattern.
According to each described method of claim 1 to 7, it is characterized in that 10, the detection sequence of described 2:2 conversion meets the 2:2 transfer standard and detects sequence, the telecine release of an interleave pattern that then switches to the 2:2 conversion comprises:
The number of times that the standard detection sequence that the detection sequence of described 2:2 conversion and 2:2 are changed meets continuously counts to get count value CNT_film22, if described count value CNT_film22 reaches the 2:2 conversion incision threshold value that sets in advance, then switch to 2:2 conversion release of an interleave pattern.
11, method according to claim 10, it is characterized in that, described switching to after the 2:2 conversion release of an interleave pattern, further comprise: the detection sequence of described 2:2 conversion and the continuous incongruent number of times of standard detection sequence of 2:2 conversion are counted to get count value UCNT_film22, cut out threshold value if described count value reaches the 2:2 conversion that sets in advance, then switch and 2:2 conversion release of an interleave pattern.
12, a kind of device that detects television movie mode is characterized in that, comprising:
Signal storage is used for the field signal and the transmission of n field, n+1 field and the n+2 field of storage order input, sends the line synchronizing signal and the row synchronizing signal of field signal, and wherein n is the sequence number of field signal;
Ranks reach the absolute difference control unit synchronously, are used for according to line synchronizing signal and the row synchronizing signal from the described signal storage that are received, calculate the ranks value; Judge that according to the ranks value of being calculated whether current pixel is the pixel that last needs detects in the image, obtains statistical computation enable signal STA_EN according to judged result;
The absolute difference computation device, be used to receive the field signal that described signal storage sends, calculate every a field absolute difference and an adjacent absolute difference according to described field signal, when receiving described statistical computation enable signal STA_EN, gained is sent to described sequential detector every a field absolute difference and an adjacent absolute difference;
Sequential detector is used for being exported 3:2 transition detection sequence according to what receive every the field absolute difference, according to adjacent the absolute difference output 2:2 transition detection sequence of being received;
The film mode determining device is used for judging according to the 3:2 transition detection sequence of described sequential detector output whether field signal is 3:2 conversion TV set film signal; Judge according to the 2:2 transition detection sequence of described sequential detector output whether field signal is that 2:2 changes TV set film signal, export the television movie mode index signal according to the result of above-mentioned judgement;
The scene switch unit is used for the television movie mode index signal according to described film mode determining device output, carries out the mutual switching between 3:2 conversion release of an interleave pattern, 2:2 conversion release of an interleave pattern and other release of an interleave patterns.
13, according to the described device of claim 12, it is characterized in that, described signal storage comprises first memory cell, second memory cell and the 3rd memory cell, be respectively applied for the field signal of n field, n+1 field and the n field of storage order input, and respectively the pixel value of the field signal of being stored separately be sent to the absolute difference computation device;
Described first memory cell is used for the line synchronizing signal of the field signal that will be stored and row synchronizing signal and is sent to ranks and reaches the absolute difference control unit synchronously.
14, device according to claim 13 is characterized in that,
Described ranks reach the absolute difference control unit synchronously and are further used for: judge whether described ranks value meets the detection configuration parameter that sets in advance, if then send absolute difference computation control enable signal SAD_EN to described absolute difference computation device;
Described absolute difference computation device comprises:
Every field absolute difference analytic unit, be used for calculating absolute value from the pixel difference of first memory cell and the 3rd memory cell according to absolute difference computation control enable signal SAD_EN, so according to statistical computation enable signal STA_EN obtain n field and n+2 field every the field absolute difference;
Adjacent absolute difference analytic unit, be used for according to the absolute value of absolute difference computation control enable signal SAD_EN calculating, and then obtain an adjacent absolute difference of n field and n+1 field according to statistical computation enable signal STA_EN from the pixel difference of first memory cell and second memory cell.
15, device according to claim 14 is characterized in that,, describedly comprise register, comparator, counter and output control unit every field absolute difference analytic unit;
Described register is used to store the noise gate that sets in advance;
Described comparator is used for the noise gate every field pixel difference absolute value and register from the absolute difference calculator is compared, and according to comparative result described counter is counted;
Described output control unit is used for exporting according to the statistical computation enable signal STA_EN that is received the value of described counter, and described counter is made zero.
16, device according to claim 14 is characterized in that, described adjacent absolute difference analytic unit comprises register, comparator, counter and output control unit;
Described register is used to store the noise gate that sets in advance;
Described comparator is used for described counter being counted according to comparative result comparing from an adjacent pixel difference absolute value of absolute difference calculator and the noise gate of described register;
Described output control unit is used for exporting according to the statistical computation enable signal STA_EN that is received the value of described counter, and described counter is made zero.
17, device according to claim 14 is characterized in that, described sequential detector comprises:
3:2 Sequence Detection unit, be used for according to from every field absolute difference analytic unit every the field absolute difference, generate also output 3:2 transition detection sequence;
2:2 Sequence Detection unit is used for according to the adjacent absolute difference from adjacent absolute difference analytic unit, generates and output 2:2 transition detection sequence.
18, device according to claim 17, it is characterized in that, described 3:2 Sequence Detection unit further comprises static thresholding judging unit, be used to judge current whether be in 3:2 conversion release of an interleave pattern and current every the field absolute difference less than static thresholding, if then equal the 3:2 transition detection sequence that the 3:2 transfer standard detects sequence on the 3:2 Sequence Detection unit output numerical value;
Described 2:2 Sequence Detection unit further comprises static thresholding judging unit, be used to judge current whether be in 2:2 conversion release of an interleave pattern and current every the field absolute difference less than static thresholding, if then equal the 2:2 transition detection sequence that the 2:2 transfer standard detects sequence on the 2:2 Sequence Detection unit output numerical value.
19, device according to claim 17 is characterized in that, described film mode determining device comprises:
3:2 film mode judging unit, be used for and compare from the 3:2 transition detection sequence and the 3:2 transfer standard detection sequence of 3:2 Sequence Detection unit, send 3:2 conversion television movie mode index signal film_en32 to the scene switch unit according to comparative result;
2:2 film mode judging unit, be used for and compare from the 2:2 transition detection sequence and the 2:2 transfer standard detection sequence of 2:2 Sequence Detection unit, send 2:2 conversion television movie mode index signal film_en22 to the scene switch unit according to comparative result.
20, device according to claim 19, it is characterized in that, described 3:2 film mode judging unit further comprises auxiliary rest image detecting unit, being used to work as the 3:2 transition detection sequence received occurs when being 0 situation continuously, if the film_en32 signal is effectively, then still keep the film_en32 signal for effective;
Described 2:2 film mode judging unit further comprises auxiliary rest image detecting unit, is used to work as the 2:2 transition detection sequence of being received and occurs if the film_en22 signal be effectively, then still keeping the film_en22 signal for effective when being 0 situation continuously.
According to claim 19 or 20 described devices, it is characterized in that 21, described scene switch unit comprises:
3:2 index signal counting unit is used for the film_en32 signal is counted for effective number continuously, obtains count results CNT_film32;
2:2 index signal counting unit is used for the film_en22 signal is counted for effective number continuously, obtains count results CNT_film22; Perhaps the film_en22 signal is counted for invalid number continuously, obtained count results UCNT_film22;
Described scene switch unit is used for current when being in non-TV set film signal release of an interleave pattern, CNT_film32 or 2:2 index signal counting unit CNT_film22 that obtains and the incision threshold value that sets in advance that described 3:2 index signal counting unit is obtained compare, if CNT_film32, then switches to 3:2 conversion release of an interleave pattern greater than described incision threshold value; If CNT_film22, then switches to 2:2 conversion release of an interleave pattern greater than described incision threshold value.
22, device according to claim 21 is characterized in that, described 3:2 index signal counting unit is further used for the film_en32 signal is counted for invalid number continuously, obtains count results UCNT_film32; When described scene switch unit is further used for the current 3:2 of being in conversion release of an interleave pattern, if UCNT_film32 greater than the threshold value that cuts out that sets in advance, then switches to the release of an interleave pattern of non-TV set film signal;
Described 2:2 index signal counting unit is further used for the film_en22 signal is counted for invalid number continuously, obtains count results UCNT_film22; When described scene switch unit is further used for the current 2:2 of being in conversion release of an interleave pattern, if UCNT_film22 greater than the threshold value that cuts out that sets in advance, then switches to the release of an interleave pattern of non-TV set film signal.
23, a kind of display is characterized in that, comprises the TV set film signal detecting unit, release of an interleave unit and display unit;
Described TV set film signal detecting unit is used to receive interleaved signal, detects the television movie mode of described interleaved signal, exports corresponding release of an interleave mode indication signal according to testing result, specifically comprises:
Signal storage is used for the field signal and the transmission of n field, n+1 field and the n+2 field of storage order input, sends the line synchronizing signal and the row synchronizing signal of field signal, and wherein n is the sequence number of field signal;
Ranks reach the absolute difference control unit synchronously, are used for according to line synchronizing signal and the row synchronizing signal from the described signal storage that are received, calculate the ranks value; Judge that according to the ranks value of being calculated whether current pixel is the pixel that last needs detects in the image, obtains statistical computation enable signal STA_EN according to judged result;
The absolute difference computation device, be used to receive the field signal that described signal storage sends, calculate every a field absolute difference and an adjacent absolute difference according to described field signal, when receiving described statistical computation enable signal STA_EN, gained is sent to described sequential detector every a field absolute difference and an adjacent absolute difference;
Sequential detector is used for being exported 3:2 transition detection sequence according to what receive every the field absolute difference, according to adjacent the absolute difference output 2:2 transition detection sequence of being received;
The film mode determining device is used for judging according to the 3:2 transition detection sequence of described sequential detector output whether field signal is 3:2 conversion TV set film signal; Judge according to the 2:2 transition detection sequence of described sequential detector output whether field signal is that 2:2 changes TV set film signal, export the television movie mode index signal according to the result of above-mentioned judgement;
The scene switch unit is used for the television movie mode index signal according to described film mode determining device output, carries out the mutual switching between 3:2 conversion release of an interleave pattern, 2:2 conversion release of an interleave pattern and other release of an interleave patterns;
Described release of an interleave processing unit is used to receive interleaved field signal, and from the release of an interleave mode indication signal of scene switch unit, according to described release of an interleave mode indication signal, the field signal that receives is carried out the release of an interleave of corresponding modes and handle, the output progressive-scan signal;
Described display unit then is used to show described progressive-scan signal.
24, display according to claim 23, it is characterized in that, described signal storage comprises first memory cell, second memory cell and the 3rd memory cell, be respectively applied for the field signal of n field, n+1 field and the n field of storage order input, and respectively the pixel value of the field signal of being stored separately be sent to the absolute difference computation device; Described first memory cell is used for the line synchronizing signal of the field signal that will be stored and row synchronizing signal and is sent to ranks and reaches the absolute difference control unit synchronously.
25, display according to claim 24, it is characterized in that, described ranks reach the absolute difference control unit synchronously and are further used for: judge whether described ranks value meets the detection configuration parameter that sets in advance, if then send absolute difference computation control enable signal SAD_EN to described absolute difference computation device;
Described absolute difference computation device comprises:
Every field absolute difference analytic unit, be used for calculating absolute value from the pixel difference of first memory cell and the 3rd memory cell according to absolute difference computation control enable signal SAD_EN, so according to statistical computation enable signal STA_EN obtain n field and n+2 field every the field absolute difference;
Adjacent absolute difference analytic unit, be used for according to the absolute value of absolute difference computation control enable signal SAD_EN calculating, and then obtain an adjacent absolute difference of n field and n+1 field according to statistical computation enable signal STA_EN from the pixel difference of first memory cell and second memory cell.
26, display according to claim 25 is characterized in that, described sequential detector comprises:
3:2 Sequence Detection unit, be used for according to from every field absolute difference analytic unit every the field absolute difference, generate also output 3:2 transition detection sequence; Described 3:2 Sequence Detection unit further comprises static thresholding judging unit, be used to judge current whether be in 3:2 conversion release of an interleave pattern and current every the field absolute difference less than static thresholding, if then equal the 3:2 transition detection sequence that the 3:2 transfer standard detects sequence on the 3:2 Sequence Detection unit output numerical value;
2:2 Sequence Detection unit is used for according to the adjacent absolute difference from adjacent absolute difference analytic unit, generates and output 2:2 transition detection sequence; Described 2:2 Sequence Detection unit further comprises static thresholding judging unit, be used to judge current whether be in 2:2 conversion release of an interleave pattern and current every the field absolute difference less than static thresholding, if then equal the 2:2 transition detection sequence that the 2:2 transfer standard detects sequence on the 2:2 Sequence Detection unit output numerical value.
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| CN101751880B (en) * | 2008-12-03 | 2012-11-21 | 群康科技(深圳)有限公司 | Liquid crystal display device and image compensation method thereof |
| CN103297740A (en) * | 2013-05-29 | 2013-09-11 | 四川长虹电器股份有限公司 | Method for eliminating pausing of display |
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| US5398071A (en) * | 1993-11-02 | 1995-03-14 | Texas Instruments Incorporated | Film-to-video format detection for digital television |
| KR20040054032A (en) * | 2002-12-16 | 2004-06-25 | 삼성전자주식회사 | Format detection apparatus and method of image signal |
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| KR20050011068A (en) * | 2003-07-21 | 2005-01-29 | 삼성전자주식회사 | Apparatus and a method for detecting film mode |
| KR20050011067A (en) * | 2003-07-21 | 2005-01-29 | 삼성전자주식회사 | Apparatus and a method for detecting 2:2 pull-down sequence |
| CN100502472C (en) * | 2006-11-13 | 2009-06-17 | 华为技术有限公司 | Method, device and display for detecting television movie mode |
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| CN101751880B (en) * | 2008-12-03 | 2012-11-21 | 群康科技(深圳)有限公司 | Liquid crystal display device and image compensation method thereof |
| CN103297740A (en) * | 2013-05-29 | 2013-09-11 | 四川长虹电器股份有限公司 | Method for eliminating pausing of display |
| CN105550923A (en) * | 2015-12-23 | 2016-05-04 | 阿里巴巴集团控股有限公司 | Method and apparatus for displaying network products on product shelf |
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