CN102761727A - MEMC (motion estimate and motion compensation) method for video processing - Google Patents
MEMC (motion estimate and motion compensation) method for video processing Download PDFInfo
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Abstract
The invention provides an MEMC (motion estimate and motion compensation) method for video processing. The method comprises the following steps: 10) receiving data in 60Hz frame format and 3:2pull down mode, detecting the induction points of the frame data and marking the induction points; and 20) inserting two frames of gray scale data at each marked induction point to form data in the 96Hz frame format or 20') inserting four frames of gray scale data at each marked induction point to form data in the 120Hz frame format.
Description
Technical field
The present invention relates to video processing technique, more specifically, the present invention relates to a kind of MEMC method that is used for Video processing.
Background technology
At present; Generally include two kinds of display unit; Be respectively impulse type display unit and maintenance display unit; The impulse type display unit is after image writes the screen of display unit, and at certain twilight sunset of fluorescent material luminescence generated by light between retention period, wherein cathode-ray tube display and electroluminescent show and all belong to the impulse type display unit.The maintenance display unit is writing the demonstration that keeps last picture frame before the new image frame, and wherein, LCD and electroluminescent display belong to the maintenance display unit.
A shortcoming of maintenance display unit is the blooming that in moving image, takes place, and in the image of moving object at a plurality of frames, occur, and spectators' eyes is during along with the motion of moving object, and stack and reflection appear in the image of these a plurality of frames in eye.Before the former frame that is shown image was replaced by back one frame, former frame remained, but human eye is anticipated the demonstration of the next frame of image, transfers to the direction of motion of the moving object on the former frame image through sight line and watches this moving object.In addition, eyes carry out image sampling in the time interval shorter than the interFrameGap of moving image, thereby observe blurred picture.
For based on 3:2 that carries out on the progressive scanning technology or 2:2 Pull down pattern, be with the cinefilm to being initial a kind of video signal regeneration technology of taking the ntsc video software of material media.Most DVD film all is earlier through the conversion of film image to vision signal with other broadcasts with the film of vision signal medium record.Shooting speed was 24 frame/seconds in the process that use cinefilm is originally taken.Put 2 times principle by every lattice when playing at the cinema and realize the speed of 48 frame/seconds, this just needs to realize 2:2Pull Down associative mode.
In addition; Along with the development of LCDs technology, it is 96 or the display screen of 120Hz that the manufacturer has released novel 1920*1080, refreshing frequency, but because the conventional screen-refresh frequency of LCD TV is 60Hz; Divide two according to first lattice in the time of DVD playing back; Second lattice divide three, and the 3rd lattice divide two, and the 4th lattice divide three order to convert the length of 60 (30 frames)/second to.Because what adopt is horizontal-interlace technique, these 60 all is the image of incomplete 262.5 lines, and per the 2nd, 3 frame all the situation that the doubling of the image is obscured can occur, and makes the details of image fuzzy even lose.
Tradition film film is to record with 24 of per seconds, is called 24p, is to project on the screen with 48 when playing at the cinema; But in the time will forwarding television signal to (NTSC/PAL), must change into 50/60, be to adopt 3:2/2:2 pull down technology; And when being recorded to DVD/VCD, in discs, only can store 24, and 3:2/2:2 pull down is accomplished among the DVD player; Through terminals such as AV/YPP, see the 60i signal off again.
When 3:2 pull down signal is sent to TV; De-interlacer can judge whether the film into 3:2 pull down (film mode), when confirming to be film mode, just inserts in not carrying out; Only need the image overlapping be opened in front and back gets final product; Therefore so long as the film of 3:2 pull down, when LVDS delivers to LCD TV, will form 1 second film of 60 of continuous state of AAABBCCCDD through the processing of video board.
But the film of AAABBCCCDD enters LCD, can produce usually and stop walking effect, and it is exactly the reason of shake that following table 1 illustrates.
Table 1
| A | A | A | B | B | C | C | C | D | D |
| Stop | Stop | Walk | Stop | Walk | Stop | Stop | Walk | Stop | Walk |
Above-mentioned film can run into bigger problem when being transformed into 120 through estimation and motion compensation (MEMC).If the film that does not have to be directed against 3:2 pull down especially processes, then can form new shake, be called 5131 shakes, as shown in table 2 below.
Table 2
It is thus clear that in this motor pattern, the frame period, human eye was seen the shake situation greater than 20ms, greatly image viewing quality.
Summary of the invention
For overcoming above-mentioned defective of the prior art, the present invention proposes a kind of MEMC method and apparatus that is used for Video processing.
According to an aspect of the present invention; A kind of MEMC device that is used for Video processing has been proposed; Comprise: 3:2 PULL DOWN detector, estimation and compensating unit and frame are arranged rate controller; It is characterized in that 3:2 PULL DOWN detector is used for receiving the frame change location of raw video signal and induction raw video image; 3:2 PULL DOWN detector is arranged rate controller with estimation with compensating unit and frame respectively and is linked to each other, and is used for that controller signals is sent to estimation and compensating unit and frame and arranges rate controller; Estimation and compensating unit receive the primitive frame image of 3:2 PULL DOWN detector transmission and know the position that frame changes; The primitive frame image is carried out interleave, and frame is arranged rate controller and estimation and compensating unit carry out the motion compensation of interleave formula to the primitive frame image after, picture frame is arranged according to the demonstration refreshing frequency and the image resolution ratio of display again.
According to a further aspect in the invention, proposed a kind of MEMC method that is used for Video processing, having comprised: step 10), received the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, the induction point mark; Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format.
According to another aspect of the invention, proposed a kind of MEMC method that is used for Video processing, having comprised: step 10), received the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, the induction point mark; Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format; Perhaps step 20 '), insert four frame gradation datas at the induction point place of each mark, form the data of 120Hz frame format.
The present invention uses the new frame data of MEMC technique for generating, and the system that gray scale or black frame data are used for 120Hz is reset and inserted to original frame data.
The present invention uses the new frame data of MEMC technique for generating, and original frame data are reset to be used for the system of 96Hz.
Through using the present invention, make that the frame period is 20.84ms, vision shake situation can not occur, and can reduce and eliminate the shake in the 3:2 pull down pattern, and the display effect that is appeared is also more level and smooth.
Description of drawings
Fig. 1 is the MEMC device that is used for Video processing according to the first embodiment of the present invention;
Fig. 2 is the MEMC method that is used for Video processing according to a second embodiment of the present invention;
Fig. 3 is the MEMC method that is used for Video processing of a third embodiment in accordance with the invention;
Fig. 4 is the frame period signal in the method shown in Figure 3.
As shown in the figure; In order clearly to realize the structure of embodiments of the invention, marked specific structure and device in the drawings, but this is merely the signal needs; Be not that intention is limited to the present invention in this ad hoc structure, device and the environment; According to concrete needs, those of ordinary skill in the art can adjust these devices and environment or revise, and adjustment of being carried out or modification still are included in the scope of accompanying Claim.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment a kind of MEMC method and apparatus that is used for Video processing provided by the invention is described in detail.
In the following description, with description a plurality of different aspects of the present invention, yet, for the one of ordinary skilled in the art, can only utilize perhaps entire infrastructure more of the present invention or flow process to come embodiment of the present invention.For the definition of explaining, specific number, configuration and order have been set forth, but clearly, in that do not have also can embodiment of the present invention under the situation of these specific detail.In other cases, in order not obscure the present invention, will set forth no longer in detail for some well-known characteristics.
Fig. 1 illustrates the MEMC processing unit that is used for Video processing according to the first embodiment of the present invention; As shown in Figure 1, this processing unit comprises 3:2 pull down detector (DTC) unit, estimation and compensating unit (MEMC) and frame arrangement rate controller (AFRC).Wherein, DTC is used to receive raw video signal, and this raw video signal is the picture frame of 60Hz, and DTC is used for responding to the frame change location of primitive frame image.
For example, for the picture frame shown in the table 1, DTC is used to respond to the position that frame changes; Two positions that B begins to locate when promptly three A finish, three positions that C begins to locate when two B finish, two positions that D begins to locate when three C finish; Three positions that E begins to locate when two D finish, or the like.Wherein, for the initial data of 3:2pull down pattern, at first be continuous three first the same frame data; Continuous then two second the same frame data; Being continuous three the 3rd the same frame data then, is continuous two the 4th the same frame data then, repeats so like this.During detection, be the position of knowing the change point between the different frame data.Particularly, detect the change point between the first frame data A and the second frame data B, the change point between the second frame data B and the 3rd frame data C, or the like.Afterwards, all change points are carried out mark according to time point.
Wherein, The DTC detector is arranged rate controller with estimation with compensating unit (MEMC) and frame respectively and is linked to each other; Be used for that controller signals is sent to estimation and compensating unit (MEMC) and frame and arrange rate controller; The DTC detector also links to each other with compensating unit (MEMC) data with estimation, is used for the two field picture behind the mark that is received is sent to the MEMC unit.
Behind the frame change location of DTC detector in knowing the primitive frame image, the frame change location that this is corresponding sends to the MEMC unit, so that the moment that interior interpolation is repaid is known in the MEMC unit.The MEMC unit receives the primitive frame image that the DTC detector sends, and knows the position that frame changes, and the primitive frame image is carried out interleave, realizes the compensation of moving image.
Particularly, insert two frame gradation datas, form the data of 96Hz frame format at the induction point place of each mark; After two continuous Frames of the data of 96Hz frame format, insert a gradation data or black data piece, form the data of 120Hz frame format.
Wherein, insert two frame gradation datas, form the data of 96Hz frame format for induction point place at each mark.For the induction point that carries out mark, when learning that this point is induction point, insert two frame gradation datas in this position.Wherein, constituting of this two frames gradation data: if this frame is the identical data of continuous three frames, then the 3rd frame data are changed into the data by 1/2 this frame and the combination of 1/2 next frame, insert the data that make up by 1/2 this frame and 1/2 next frame simultaneously thereafter; For this frame is the identical data of two continuous frames, directly inserts the data of two frames by 1/2 this frame and the combination of 1/2 next frame thereafter.Thereby, the data of formation 96Hz frame format.
Wherein, for after two continuous Frames of the data of 96Hz frame format, inserting a gradation data or black data piece.Wherein, these two continuous Frames are two continuous initial data frame.Perhaps, wherein, these two continuous Frames are the two frame gradation datas that inserted.Perhaps, after any Frame, insert a gradation data or black data piece.
Perhaps, insert four frame gradation datas, form the data of 120Hz frame format at the induction point place of each mark.For the induction point that carries out mark, when learning that this point is induction point, insert the gradation data that four frames are combined by the frame data before and after the gauge point in this position.Wherein, Constituting of this four frames gradation data: if this frame is the identical data of continuous three frames; Then the second and the 3rd frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame, new two frame data that insert are by the data of 1/3 this frame and the combination of 2/3 next frame.For this frame is the identical data of two continuous frames; Then second frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame; First frame is the data by 2/3 this frame and the combination of 1/3 next frame in new three frame data that insert, and back two frames in new three frame data that insert are the data by 1/3 this frame and the combination of 2/3 next frame.Thereby, directly constitute the data of 120Hz frame format.
The MECM unit is connected with the AFRC unit, after MEMC carries out the motion compensation of interleave formula to the primitive frame image, picture frame is arranged control again according to the demonstration refreshing frequency and the image resolution ratio of display, the duration and the frame length of adjustment frame.
This processing unit also comprises a plurality of frame memory cell (FMU), and these frame memory cell are connected to DTC unit, MEMC unit and AFRC unit respectively, is used to the two field picture that these three unit are stored temporarily needs processing.
Fig. 2 illustrates the MEMC method that is used for Video processing according to a second embodiment of the present invention, and as shown in Figure 2, this method comprises: step 10), receive the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, with the induction point mark; Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format.This method also comprises: step 30), after two continuous Frames of the data of 96Hz frame format, insert a gradation data or black data piece.
Particularly,, wherein, step 10), receive the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, the induction point mark further referring to Fig. 2.Wherein, for the initial data of 3:2pull down pattern, its form is as shown in table 2 below.
Table 2
As shown in table 2, continuous three first the same frame data, continuous then two second the same frame data are continuous three the 3rd the same frame data then, are continuous two the 4th the same frame data then, repeat so like this.During detection, be the change point position between the different frame data.Particularly, as above table 2 detects the change point between the first frame data A and the second frame data B, the change point between the second frame data B and the 3rd frame data C, or the like.Afterwards, all change points are carried out mark according to time point.
Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format.For the induction point that carries out mark, when learning that this point is induction point, insert two frame gradation datas in this position.Wherein, constituting of this two frames gradation data: if this frame is the identical data of continuous three frames, then the 3rd frame data are changed into the data by 1/2 this frame and the combination of 1/2 next frame, insert the data that make up by 1/2 this frame and 1/2 next frame simultaneously thereafter; For this frame is the identical data of two continuous frames, directly inserts the data of two frames by 1/2 this frame and the combination of 1/2 next frame thereafter.Thereby, the data of formation 96Hz frame format.
Step 30), after two continuous Frames of the data of 96Hz frame format, insert a gradation data or black data piece.Wherein, these two continuous Frames are two continuous initial data frame.Perhaps, wherein, these two continuous Frames are the two frame gradation datas that insert in the above-mentioned steps 20.Perhaps, after any Frame, insert a gradation data or black data piece.
Fig. 3 is the MEMC method that is used for Video processing of a third embodiment in accordance with the invention; As shown in Figure 3, this method comprises: step 10), receive the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, with the induction point mark; Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format; Perhaps step 20 '), insert four frame gradation datas at the induction point place of each mark, form the data of 120Hz frame format.
Particularly,, wherein, step 10), receive the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, the induction point mark further referring to Fig. 2.Wherein, for the initial data of 3:2pull down pattern, its form is as shown in table 3 below.
Table 3
As shown in table 3, continuous three first the same frame data, continuous then two second the same frame data are continuous three the 3rd the same frame data then, are continuous two the 4th the same frame data then, repeat so like this.During detection, be the change point position between the different frame data.Particularly, as above table 3 detects the change point between the first frame data A and the second frame data B, the change point between the second frame data B and the 3rd frame data C, or the like.Afterwards, all change points are carried out mark according to time point.
Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format.For the induction point that carries out mark, when learning that this point is induction point, insert two frame gradation datas in this position.Wherein, constituting of this two frames gradation data: if this frame is the identical data of continuous three frames, then the 3rd frame data are changed into the data by 1/2 this frame and the combination of 1/2 next frame, insert the data that make up by 1/2 this frame and 1/2 next frame simultaneously thereafter; For this frame is the identical data of two continuous frames, directly inserts the data of two frames by 1/2 this frame and the combination of 1/2 next frame thereafter.Thereby, the data of formation 96Hz frame format.
Step 20 '), insert four frame gradation datas at the induction point place of each mark, form the data of 120Hz frame format.For the induction point that carries out mark, when learning that this point is induction point, insert the gradation data that four frames are combined by the frame data before and after the gauge point in this position.Wherein, Constituting of this four frames gradation data: if this frame is the identical data of continuous three frames; Then the second and the 3rd frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame, new two frame data that insert are by the data of 1/3 this frame and the combination of 2/3 next frame.For this frame is the identical data of two continuous frames; Then second frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame; First frame is the data by 2/3 this frame and the combination of 1/3 next frame in new three frame data that insert, and back two frames in new three frame data that insert are the data by 1/3 this frame and the combination of 2/3 next frame.Thereby, the data of formation 120Hz frame format.
Fig. 4 describes in the cycle in the method shown in Figure 3, and is as shown in Figure 4, through the same number of frames of interleave processing; The duration of each frame is 10.42ms, and it is identical that two frames are only arranged, and then the Frame cycle of this 96Hz frame format is 20.84ms; Approach 20ms, satisfy the viewing demand of human eye.
Can find out that as above method is simpler than method shown in Figure 2 shown in 3, and method shown in Figure 3 is more saved the frame memory space than method shown in Figure 2.
In yet another embodiment; A kind of LCD TV is provided, and this LCD TV comprises LCDs, also comprises a video processor; This video processor comprises 3:2 pull down detector (DTC), estimation and compensating unit (MEMC) and frame arrangement rate controller (AFRC); DTC is used to receive raw video signal, and this raw video signal is the picture frame of 60Hz, and DTC is used for responding to the frame change location of primitive frame image.For example, for the picture frame shown in the table 1, DTC is used to respond to the position that frame changes.Wherein, for the initial data of 3:2pull down pattern, at first be continuous three first the same frame data; Continuous then two second the same frame data; Being continuous three the 3rd the same frame data then, is continuous two the 4th the same frame data then, repeats so like this.During detection, be the position of knowing the change point between the different frame data.Particularly, detect the change point between the first frame data A and the second frame data B, the change point between the second frame data B and the 3rd frame data C, or the like.Afterwards, all change points are carried out mark according to time point.
Wherein, The DTC detector is arranged rate controller with estimation with compensating unit (MEMC) and frame respectively and is linked to each other; Be used for controller signals send to estimation and compensating unit (MEMC), frame is arranged rate controller; The DTC detector links to each other with compensating unit (MEMC) data with estimation, is used for the two field picture that is received is sent to the MEMC unit.
Behind the frame change location of DTC detector in knowing the primitive frame image, the frame change location that this is corresponding sends to the MEMC unit, so that the moment that interior interpolation is repaid is known in the MEMC unit.The MEMC unit receives the primitive frame image that the DTC detector sends, and knows the position that frame changes, and the primitive frame image is carried out interleave, realizes the compensation of moving image.
Particularly, insert two frame gradation datas, form the data of 96Hz frame format at the induction point place of each mark; After two continuous Frames of the data of 96Hz frame format, insert a gradation data or black data piece.
Wherein, insert two frame gradation datas, form the data of 96Hz frame format for induction point place at each mark.For the induction point that carries out mark, when learning that this point is induction point, insert two frame gradation datas in this position.Wherein, constituting of this two frames gradation data: if this frame is the identical data of continuous three frames, then the 3rd frame data are changed into the data by 1/2 this frame and the combination of 1/2 next frame, insert the data that make up by 1/2 this frame and 1/2 next frame simultaneously thereafter; For this frame is the identical data of two continuous frames, directly inserts the data of two frames by 1/2 this frame and the combination of 1/2 next frame thereafter.Thereby, the data of formation 96Hz frame format.
Wherein, for after two continuous Frames of the data of 96Hz frame format, inserting a gradation data or black data piece.Wherein, these two continuous Frames are two continuous initial data frame.Perhaps, wherein, these two continuous Frames are above-mentioned two frame gradation datas that insert.Perhaps, after any Frame, insert a gradation data or black data piece.
Perhaps, insert four frame gradation datas, form the data of 120Hz frame format at the induction point place of each mark.For the induction point that carries out mark, when learning that this point is induction point, insert the gradation data that four frames are combined by the frame data before and after the gauge point in this position.Wherein, Constituting of this four frames gradation data: if this frame is the identical data of continuous three frames; Then the second and the 3rd frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame, new two frame data that insert are by the data of 1/3 this frame and the combination of 2/3 next frame.For this frame is the identical data of two continuous frames; Then second frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame; First frame is the data by 2/3 this frame and the combination of 1/3 next frame in new three frame data that insert, and back two frames in new three frame data that insert are the data by 1/3 this frame and the combination of 2/3 next frame.Thereby, the data of formation 120Hz frame format.
The MECM unit is connected with the AFRC unit, after MEMC carries out the motion compensation of interleave formula to the primitive frame image, picture frame is arranged control again according to the demonstration refreshing frequency and the image resolution ratio of display, the duration and the frame length of adjustment frame.
This processing unit also comprises a plurality of frame memory cell (FMU), and these frame memory cell are connected to DTC unit, MEMC unit and AFRC unit respectively, is used to the two field picture that these three unit are stored temporarily needs processing.
What should explain at last is; Above embodiment is only in order to describe technical scheme of the present invention rather than the present technique method is limited; The present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (8)
1. MEMC method that is used for Video processing comprises:
Step 10), receive the data of the 3:2pull down pattern of 60Hz frame format, detect the induction point of these frame data, the induction point mark;
Step 20), insert two frame gradation datas at the induction point place of each mark, the data of formation 96Hz frame format; Perhaps
Step 20 '), insert four frame gradation datas at the induction point place of each mark, form the data of 120Hz frame format.
2. the described method of claim 1 also comprises:
Step 30), after two continuous Frames of the data of 96Hz frame format, insert a gradation data or black data piece.
3. the described method of claim 1 wherein, in the step 10), detects the change point position between the different frame data, and all change points are carried out mark according to time point.
4. the described method of claim 1; Wherein, Step 20) in; The constituted mode of this two frames gradation data: when this frame is the identical data of continuous three frames, the 3rd frame data are changed into the data by 1/2 this frame and the combination of 1/2 next frame, insert the data that make up by 1/2 this frame and 1/2 next frame simultaneously thereafter.
5. the described method of claim 1, wherein, step 20) in, the constituted mode of this two frames gradation data: for this frame is the identical data of two continuous frames, directly inserts the data of two frames by 1/2 this frame and the combination of 1/2 next frame thereafter.
6. the described method of claim 1, wherein, step 20 ') in, for the induction point that carries out mark, when learning that this point is induction point, insert the gradation data that four frames are combined by the frame data before and after the gauge point in this position.
7. the described method of claim 6; Wherein, Step 20 ') in; Constituting of this four frames gradation data: when this frame is the identical data of continuous three frames, then the second and the 3rd frame data are changed into the data by 2/3 this frame and the combination of 1/3 next frame, new two frame data that insert are by the data of 1/3 this frame and the combination of 2/3 next frame.
8. the described method of claim 6; Wherein, Step 20 ') in, the constituting of this four frames gradation data: for this frame is the identical data of two continuous frames, then second frame data is changed into the data by 2/3 this frame and the combination of 1/3 next frame; First frame is the data by 2/3 this frame and the combination of 1/3 next frame in new three frame data that insert, and back two frames in new three frame data that insert are the data by 1/3 this frame and the combination of 2/3 next frame.
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Application publication date: 20121031 |