CN1479299A - Deivce and method for broading static image - Google Patents
Deivce and method for broading static image Download PDFInfo
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- CN1479299A CN1479299A CNA021418691A CN02141869A CN1479299A CN 1479299 A CN1479299 A CN 1479299A CN A021418691 A CNA021418691 A CN A021418691A CN 02141869 A CN02141869 A CN 02141869A CN 1479299 A CN1479299 A CN 1479299A
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Abstract
The device and method play back first image and second image as well as play back a virtual frame at period between times of playing first image and second image. First, the method receives bit stream, and then decodes the stream to obtain the first and second images. Then, based on special video effects needed, the method creates parameters for the virtual frame. Based on the parameters of the virtual frame, the virtual frame is generated by using motion compensation unit.
Description
Technical field
The present invention relates to a kind of device and method, and particularly relate to a kind of device and method that utilizes motion compensation units (motion compensator) to realize image special play-back still image with image special play-back still image.
Background technology
Along with multimedia development is day by day ripe, there are various video and audio products miscellaneous to satisfy the excelsior demand of people.For example, owing to better sampling frequency and resolution are arranged than present CD audio frequency specification, so DVD audio frequency specification (DVD audiospecification) comes into one's own gradually.
In DVD audio frequency specifications, stipulate, player is except the need audio plays, also need have the ability of playing still image, and the operable special exhibition method of several broadcast still images has also been proposed in the specifications, for example be to sweep (wipe) or the modes such as (dissolve) of repeatedly changing is taken next image out of between two images.These image stunts realize in the mode of firmware or with extra stunt processing hardware traditionally.Yet, carry out suitable big of the load of central processing unit of firmware, handle and will make the load of central processing unit too high if increase stunt again; On the other hand, the mode of use stunt processing hardware has also improved the cost of system.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of device and method that utilizes the motion compensation units realization image special play-back still image in the DVD player.
Because at the sheet period of the day from 11 p.m. to 1 a.m of DVD playing back audio frequency (DVD Audio) specification, still image is that the mode with coded picture in the MPEG (Intra-Picture) stores, and therefore when the decoding still image, can't use motion compensation units.Therefore, aim of the present invention is to utilize existing motion compensation units under the condition of load that need not increase central processing unit or extra stunt processing hardware, and the virtual screen function is provided, to realize playing the image stunt of still image, with the service efficiency that reduces cost and promote hardware.
According to purpose of the present invention, a kind of method of utilizing the motion compensation units realization with image special play-back still image is proposed, be used to play first image and second image, and, broadcast at least one virtual screen playing between first image and second image.Motion compensation units is arranged in DVD player.This method comprises: at first, produce the virtual screen parameter according to required image stunt; Then, according to this virtual screen of virtual screen parameter generating.
According to another object of the present invention, a kind of video-audio playing device is proposed, be used to play first image and second image, and produce a plurality of virtual screens according to the image stunt and between first image and second image, broadcast.Video-audio playing device comprises storer, video coding system and display control program.Storer is used to store the data of first image and second image.The video coding system is used for according to image stunt and first image and second image and utilizes the motion compensation units of video coding system to produce virtual screen in regular turn.Display control program is used to play first image, second image and these virtual screens.
Description of drawings
For allowing above-mentioned purpose of the present invention, feature and the advantage can be clearer, a preferred embodiment cited below particularly, and conjunction with figs. be described in detail below.
Figure 1 shows that the calcspar of existing DVD player.
Figure 2 shows that the calcspar of video coding system.
Figure 3 shows that the calcspar of motion compensation units.
Figure 4 shows that video coding system block diagrams according to one embodiment of the present invention.
Fig. 5 A and 5B are depicted as repeatedly to change effect and play the synoptic diagram of still image.
Fig. 6 figure is depicted as to sweep effect and plays the synoptic diagram of still image.
Fig. 7 figure is depicted as to move into effect and plays the synoptic diagram of still image.
Fig. 8 A figure is depicted as the calcspar of existing interpolater.
Fig. 8 B figure is depicted as the calcspar according to interpolater of the present invention.
Embodiment
(the Moving Picture Coding Experts Group of Motion Picture Experts Group, MPEG) video of specification includes interior coded picture (Intra-Picture, abbreviation I picture), prediction encoded picture (Predictive-Picture, be called for short the P picture) and bi-directional predictive coding picture (Bidirectionally Predictive-Picture is called for short the B picture).The I picture is a complete picture, and is independent with the picture maintenance of front and back; The P picture carries out forward predictive coded by the I picture and gets; The B picture carries out forward direction and backward-predicted coding respectively by the I picture in past and following P picture and forms, and after I and the decoding of P picture, can carry out B picture decoding therebetween.Intercalary B picture can use less data volume to finish, and can obtain the preferable picture of dynamic tracing ability to animated image.A picture comprises a plurality of (block), and a picture is the action that unit carries out coding and decoding with the piece.
With reference to Fig. 1, it is depicted as the calcspar of existing DVD player 100.DVD player 100 is broadcasted after being used for MPEG bit stream S is decoded into audio A and video V.Bit stream analysis system 110 is used to receive MPEG bit stream S and it is parsed into undecoded audio bitstream Ca and video bit stream Cv, and is stored to storer 180 via storage management system 140.Then, back output audio A and video V decipher with undecoded audio bitstream Ca and video bit stream Cv respectively in audio-frequency decoding system 160 and video coding system 150, and are stored to storer 180 via storage management system 140.Audio A and video V that display control program 130 is used for storer 180 has been deciphered broadcast, and for example broadcast to televisor.Central processing system 120 is used to control the workflow between each system.Bus 170 is used for Data transmission between each system.
With reference to Fig. 2, it is depicted as the calcspar of video coding system 150.Video coding system 150 comprises variable-length decoding unit (Variable length decoder, VLD) 210, inverse quantization unit (Inverse quantization unit, IQ) 220, inverse discrete cosine converting unit (Inverse discrete cosine transformer, IDCT) 230, piece reconstruction unit (Block reconstruction, BR) 240 and motion compensation units (motioncompensator) 250.Variable-length decoding unit 210 receiver, video bit stream Cv, and export the first decoding parameter to inverse quantization unit 220/ inverse discrete cosine converting unit 230 carrying out inverse discrete cosine conversion, and export the result to piece reconstruction unit 240; Variable-length decoding unit 210 also export the second decoding parameter to motion compensation units 250 to extract one and carry out motion compensation from storer 180, output movement blocks of data M is to piece reconstruction unit 240 then.Piece reconstruction unit 240 is used to rebuild output video V behind the piece of picture.
Traditional motion compensation units 250 is extracted one to carry out motion compensation according to the second decoding parameter from storer 180, and the second decoding parameter mainly comprises forms of motion (motion type) MT and motion vector (motion vector) MV.Motion compensation units 250 is extracted the memory of data address according to motion vector MV decision again according to each block size and the form of extracting of forms of motion MT decision.Motion compensation units 250 provides forward direction (forward) motion compensation and two-way (bi-directional) motion compensation function, for the usefulness of decoding P picture and B picture.With reference to Fig. 3, it is depicted as the calcspar of motion compensation units 250.Motion compensation units 250 comprises address generator 252, data buffer 254 and interpolater 256.Motion compensation units 250 receives the second decoding parameter, and address generator 252 produces the address A of the image of required extracting according to motion vector MV.254 of data buffers are used for the specified data D of receiver address A.If motion compensation units 250 is just being carried out forward motion compensation, then only according to data D output movement blocks of data M; If motion compensation units 250 is just being carried out bi directional motion compensation, the D1 of the last picture Fp that then will extract earlier is stored to data buffer 254, the D2 of a back picture Ff that will extract again reads in, then piece D1 and D2 are carried out interpolation by interpolater 256 after, output movement blocks of data M.
For the sheet period of the day from 11 p.m. to 1 a.m in DVD playing back audio frequency (DVD Audio) specification, can utilize existing motion compensation units to realize playing the purpose of still image image stunt, the present invention has increased the function of virtual screen newly for motion compensation units, motion compensation units can be provided be similar to the function of direct memory access (DMA) (direct memory access DMA), with Data transmission between storage buffer apace.Traditional motion compensation units can only receive the decoding parameter that the variable-length decoding unit is deciphered out according to video bit stream, and extracts last picture or back one of one picture according to this, with output movement blocks of data M.The present invention provides the parameter generating unit in addition, and the parameter generating unit produces the virtual screen parameter according to required image stunt, and the feed-in motion compensation units, to be implemented in the purpose of Data transmission between the storer.Because motion compensation parameters is from the decoding of real video bit stream, so motion compensation units is equivalent in decoding oneself generation " virtual screen ".This virtual screen can be distinguished into P virtual screen and B virtual screen again: the effect of P virtual screen is passed to another storage buffer with data from a storage buffer as the P picture; And the effect of B virtual screen is as the B picture, with data respectively from two storage buffers be delivered to motion compensation units after, through data processing, again the result is deposited back storer.
With reference to Fig. 4, it is depicted as video coding system 400 calcspars according to one embodiment of the present invention.Video coding system 400 comprises motion compensation units 410, parameter generating unit 420, variable-length decoding unit 210, inverse quantization unit 220, inverse discrete cosine converting unit 230 and piece reconstruction unit 240, wherein, variable-length decoding unit 210, inverse quantization unit 220, inverse discrete cosine converting unit 230 and piece reconstruction unit 240 are existing.Parameter generating unit 420 produces virtual screen parameter and encoding block pattern CBP according to required image stunt, and the virtual screen parameter comprises forms of motion MT and motion vector MV.Motion compensation units 410 is according to virtual screen parameter output movement blocks of data M, parameter generating unit 420 is to present to piece reconstruction unit 240 after zero with encoding block pattern CBP parameter setting simultaneously, make its output fully by the output M decision of motion compensation units 410, thereby can obtain an of virtual screen.
The image stunt for example is repeatedly change (dissolve), sweeps (wipe) and immigration (move in) etc. that only lifting these three image stunts at this is example.With reference to Fig. 5 A and 5B, it is depicted as repeatedly to change effect and plays the synoptic diagram of still image.This moment, the still image that will play was image Fd1 and image Fd2, broadcast complete image Fd1 after, will take image Fd2 out of repeatedly to change effect.Image Fd0 (1) and Fd0 (2) are the virtual screen of the image stunt that the present invention produces.Among the image Fd0 (1), the video intensity ASV1 of image Fd1 subtracts slightly, and the video intensity ASV2 of image Fd2 then begins to increase; Among the image Fd0 (2), the video intensity ASV1 of image F1 more subtracts, and the video intensity ASV2 of image F2 then more increases.Come, after repeatedly changing interval Td and finishing, the video intensity ASV1 of image Fd1 then is decremented to zero again, and the image that is broadcasted then is complete image Fd2.To describe in detail in the back about the practice of repeatedly changing effect of the present invention.
With reference to Fig. 6 figure, it is depicted as to sweep effect and plays the synoptic diagram of still image.Sweep effect and can be from last, from down, sweep from a left side or from modes such as the right sides, at this being example from sweeping.This moment, the still image that will play was image Fw1 and image Fw2, will take image Fw2 out of to sweep effect after broadcasting complete image Fw1.Image Fw0 (1) and Fw0 (2) are the virtual screen of the image stunt that the present invention produces.Among the image Fw0 (1), the top of image Fw2 can be seen; Among the image Fw0 (2), the top of image Fw2 and middle part can be seen; Come again, broadcast promptly be complete image Fw2.Realize playing the method detailed description as the back of still image to sweep effect according to the present invention: motion compensation units 410 uses P virtual screen function to realize sweeping effect.At first, parameter generating unit 420 output virtual screen parameter and encoding block pattern CBP, wherein, the virtual screen parameter comprises forms of motion MT, motion vector MV, encoding block pattern CBP is zero.Then, motion compensation units 410 is extracted size according to forms of motion MT decision, for example is 16 * 16 or 16 * 8 pixels; And extract the D1 of image Fw2 according to motion vector MV; Produce the moving mass data M according to piece D1 then.Piece reconstruction unit 240 produces of virtual screen according to encoding block pattern CBP and moving mass data M.In the process that produces a virtual screen, the motion vector MV that parameter generating unit 420 is exported makes motion compensation units 410 begin piece is passed to play buffer from the top of image Fw2, and in the time of at the beginning, that play buffer is stored is image Fw1.Then, the upper mass of image Fw2 being delivered to the corresponding position of play buffer, at this moment, is image Fw0 (1) in the play buffer.Then, motion compensation units 410 continues the middle part piece of image Fw2 is moved in the play buffer, and this moment, play buffer was image Fw0 (2).Then, motion compensation units continues the bottom piece of image Fw2 is moved in the play buffer, and this moment, play buffer was image Fw2, so just finished to sweep effect playing image Fw2.
With reference to Fig. 7 figure, it is depicted as to move into effect and plays the synoptic diagram of still image.Move into effect and can be from last, from down, sweep from a left side or from modes such as the right sides, at this being example from moving into.This moment, the still image that will play was image Fm1 and image Fm2, broadcast and will take image Fm2 out of with the immigration effect after finishing image Fm1.Image Fm0 (1) and Fm0 (2) are the virtual screen of the image stunt that the present invention produced.Among the image Fm0 (1), the bottom of image Fm2 can be seen; Among the image Fm0 (2), the bottom of image Fm2 and middle part can be seen; Come again, broadcast be complete image Fm2.Move into effect and use the P virtual screen function of motion compensation units 410, its method and the above-mentioned employed method of effect that sweeps are similar, are that the source of being transmitted is different with the block address of purpose.The piece that is transmitted is the bottom of image Fm2 at the beginning, and it is passed to the top of the image Fm1 in the play buffer, so along with the time removes the piece of more images Fm2 to play buffer, data in the buffer zone to be played have been the piece of image Fm2 all, then finish to move into the purpose that effect is play.
Produce and repeatedly change the B virtual screen function that effect then need be used motion compensation units 410, just image Fd1 and Fd2 are carried out interpolation to produce virtual screen, and the video intensity of image Fd1 is successively decreased along with the time, and the video intensity of image Fd2 increased progressively, be image Fd2 up to repeatedly changing the picture that interval Td finishes to be broadcasted the back.At this moment, parameter generating unit 420 produces forms of motion MT, forward motion vector MV1, reaches reverse motion vector MV2 to motion compensation units 410, and produces block encoding image C BP to the piece reconstruction unit, and wherein, the value of piece reconstruction unit CBP is zero.Then, motion compensation units 410 according to forward motion vector MV1 and reverse motion vector MV2 with a D1 extracting picture Fd1 and the D2 of picture Fd2, and will be after its interpolation produce the moving mass data M, produce of image Fd0 by piece reconstruction unit 250 then.Broadcast this virtual screen after so finishing all pieces of a virtual screen, finish the back and broadcast image Fd2 repeatedly changing interval Td then, thereby can reach the effect of repeatedly changing according to the above-mentioned practice.
Wherein, the method for the video intensity ASV1 of change image Fd1 and Fd2 and ASV2 is according to the value of transparency alpha.With the equation of repeatedly changing effect broadcast still image be:
Fd0(t)＝(1-alpha(t))*Fd1+alpha(t)*Fd2 (1)
Wherein, F0 is the image in playing at present, and t is the time.Repeatedly change effect and begun repeatedly to change by first image, alpha this moment (0) is 0, so F0 (0)=Fd1; The value of alpha is along with the time increases progressively then, and after repeatedly changing interval Td end, expression repeatedly change process finishes, and this moment, the value of alpha was 1, Fd0 (Td)=Fd2, just playing image Fd2.
Because two operators of multiplying all are variable in the equation (1), therefore need the multiplier of two general services (general purpose), quite expend hardware cost.In order to save cost, alpha (t) can be reduced to a fixed value alpha, for example, alpha=1/3 makes expensive general service multiplier can be reduced to the multiplier of multiplication by constants, and equation (1) is approximately following recursion:
Fd0(t)＝(1-alpha)*Fd0(t-1)+alpha*Fd2 (2)
Fd0 (0)=Fd1 wherein.In equation (1), need there be three buffer zones to come store images Fd0, Fd1 and Fd2, and in equation (2), can only need two buffer zones to come store images Fd0 and Fd2, wherein, virtual image Fd0 (t-1) is the last picture of virtual image Fd0 (t).Adopt equation (2), also can realize along with the time is successively decreased the video intensity of image Fd1, and the purpose that the video intensity of image Fd2 is increased progressively.For example,
t＝0，Fd0(0)＝Fd1
t＝1，Fd0(1)＝(2/3)*Fd1+(1/3)*Fd2
t＝2，Fd0(2)＝(2/3)*Fd0(1)+(1/3)*Fd2
＝(2/3){(2/3)*Fd1+(1/3)*Fd2}+(1/3)*Fd2
＝(4/9)*Fd1+(5/9)*Fd2
……
In order further to save hardware, alpha can be reduced to 1/2
nForm, so can use simple shift unit (shifter) to replace multiplier.So the alpha in the equation (2) is with 1/2
nResult after the replacement is as follows:
Fd0(t)＝Fd0(t-1)*(1-(1/2
n))+Fd2*(1/2
n)
＝(Fd0(t-1)*2
n-Fd0(t-1)+Fd2)/2
n(3)
Wherein, n is a positive integer.
For the computing function of repeatedly changing required equation (3) is provided, expand the function of interpolater 256 in the motion compensation units 410.
With reference to Fig. 8 A figure, it is depicted as the calcspar of existing interpolater 256.Interpolater 256 comprises totalizer 257, dextroposition device 258 and multiplexer 259.When motion compensation units 250 was carried out the forward motion compensation function, multiplexer 259 was directly according to first D1 output movement blocks of data M.When motion compensation units 250 was carried out bi directional motion compensation, interpolater 256 received first D1 and second D2, will add 1 again after its addition, with the output additive signal.Dextroposition device 258 moves to right additive signal one more then, produces the moving mass data M according to this, and by multiplexer 259 outputs.It is to make division that dextroposition device 258 carried out for rounding up that totalizer adds 1 purpose again.Yet the interpolater 256 in traditional motion compensation units 250 only comprises after the addition function divided by 2, is not enough to repeatedly change the required computing function of effect shown in provider's formula (3).
With reference to Fig. 8 B figure, it is depicted as the calcspar according to interpolater 500 of the present invention.Interpolater 500 is used for the function of realization shown in equation (3).Interpolater 500 comprises left shifter 510, phase inverter 530, multiplexer 540,560, totalizer 520 and dextroposition device 550.Left shifter 510 is used for move to left n position and the output signal that moves to left with first D1, and wherein, n is a positive integer.Phase inverter 530 is used for first D1 data changed into negative by positive number and export a negative signal.Multiplexer 540 is selected negative signal or constant signal 1 according to different operator schemes, and exports a multiplexing signal.
When motion compensation units 410 is carried out the bi directional motion compensation of general DVD movie, left shifter 510 zero bits that moves to left, and the output signal that moves to left, the multiplexing signal of multiplexer 540 is 1, dextroposition device 550 moves to right one with additive signal, produces the moving mass data M according to this.
When the B virtual screen of effect was repeatedly changed in motion compensation units 410 execution, multiplexing signal was the negative signal.Left shifter 510 is used for move to left n position and the output signal that moves to left with first D1, and totalizer 520 is used to receive the multiplexing signal of negative, move to left signal and second D2, will output one additive signal after its addition; Then, dextroposition device 550 moves to right n with additive signal, and produces the moving mass data M according to this, then via multiplexer 560 outputs.
When motion compensation units 410 was carried out the forward motion compensation function, multiplexer 560 is first D1 of foundation directly, output movement blocks of data M.
Utilizing aforesaid equation (3) when repeatedly changing interpolation, repeatedly changing interval Td whole, alpha can be fixed as always certain 1/2
nValue.Perhaps, the other practice is, will repeatedly change interval Td and be divided into several stages, and the alpha value in each stage is 1/2
nForm, for example be 1/2,1/4 or 1/8 etc., n is a positive integer.Or, give alpha one 1/2 at each virtual screen of repeatedly changing interval Td
nThe value of form, so when reaching the effect of repeatedly changing, can more effectively control and repeatedly change speed and the degree that effect produces.
Also have multiple trick-play modes all can utilize the motion compensation units characteristic of Data transmission and realizing between storer apace in addition, do not repeat them here.
The disclosed motion compensation units of utilizing of the above embodiment of the present invention make cost reduce, and the increase system carries out efficient to realize can utilizing motion compensation units to realize the image broadcast of image stunt with the device and method of image special play-back still image.
In sum; though the present invention with a preferred embodiment openly as above; yet it is not to be used to limit the present invention; any one of ordinary skilled in the art all can be without departing from the spirit and scope of the present invention; carry out various changes and improvement, so protection scope of the present invention is defined by the following claims.
Claims (36)
1. a video-audio playing device is used to play one first image and one second image, and produces a plurality of virtual screens and broadcast between this first image and this second image according to an image stunt, and this device comprises:
One storer is used to store this first image and this second image;
One video coding system is used for according to this image stunt and this first image and this second image and utilizes a motion compensation units of this video coding system, produces these virtual screens in regular turn; And
One display control program is used to play this first image, this second image and these virtual screens.
2. video-audio playing device as claimed in claim 1, wherein this device also comprises:
One bit stream analysis system is used to receive a bit stream, analyzes output one video bit stream after its content, and wherein, this bit stream comprises the data of this first image and this second image.
3. video-audio playing device as claimed in claim 2, wherein this video coding system comprises:
One variable-length decoding unit is used to receive this video bit stream, and exports a decoding parameter;
One inverse quantization unit is used to receive this decoding parameter, it is carried out re-quantization after, export a re-quantization parameter;
One inverse discrete cosine converting unit is used to receive this re-quantization parameter, it is carried out inverse discrete cosine conversion after, export a conversion parameter;
A virtual screen parameter and a block encoding image are exported according to this image stunt in one parameter generating unit, and wherein, this block encoding image is zero;
One motion compensation units has a forward motion compensation function and a two-way motion compensation function, is used to receive this virtual screen parameter, exports moving mass data according to this virtual screen parameter; And
A reconstruction unit receives this conversion parameter, this block encoding image and this moving mass data, and produces one of this virtual image according to this.
4. video-audio playing device as claimed in claim 3, wherein, when this motion compensation units is carried out this forward motion compensation function, this virtual screen parameter comprises a forms of motion and a motion vector, when this motion compensation units is carried out this bi directional motion compensation function, this virtual screen parameter comprises this forms of motion and a forward motion vector and a reverse motion vector, and this motion compensation units comprises:
One address generator, when this motion compensation units is carried out this forward motion compensation function, this address generator is used to receive this motion vector, and export one according to this and extract the address, when this motion compensation units is carried out this bi directional motion compensation function, this address generator is used to receive this forward motion vector and this reverse motion vector, and exports one first respectively according to this and extract address and one second extraction address;
One data buffer, when this motion compensation units is carried out this forward motion compensation function, this data buffer is according to one of this this first image of extraction address extraction, when this motion compensation units is carried out this bi directional motion compensation function, this data buffer is according to one first of this this first image of first extraction address extraction, and second extract one second of this second image of address extraction according to this, the size of this first, this second and this piece be according to this forms of motion specified one extract size; And
One interpolater, when this motion compensation units is carried out this forward motion compensation function, this interpolater is used to receive this piece and exports this moving mass data according to this, when this motion compensation units is carried out this bi directional motion compensation function, this interpolater is used to receive this first and this second, both are carried out exporting this moving mass data according to this after the interpolation, and this interpolater comprises:
One left shifter is used for these data of first n position that move to left, and exports the signal that moves to left, and wherein, n is a positive integer;
One phase inverter is used for these data of first are changed into negative, and exports a negative signal;
One first multiplexer is used to receive this negative signal and exports a multiplexing signal, and when this motion compensation units was carried out this bi directional motion compensation function, this multiplexing signal was this negative signal;
One totalizer, when this motion compensation units was carried out this bi directional motion compensation function, this totalizer was used to receive this second, this move to left signal and this multiplexing signal, with this additive signal of output after its addition;
One dextroposition device is used for this additive signal n position that move to right, and exports the signal that moves to right according to this; And
One second multiplexer, be used to receive this first and this signal that moves to right, when this motion compensation units is carried out this forward motion compensation function, this second multiplexer is selected this first to be output as this moving mass data, when this motion compensation units was carried out this bi directional motion compensation function, this second multiplexer selected this signal that moves to right to be output as this moving mass data.
5. video-audio playing device as claimed in claim 1, wherein this video-audio playing device is a DVD player.
6. one kind is utilized motion compensation units to realize method with image special play-back still image, be used to play one first image and one second image, and playing between this first image and this second image, broadcast at least one virtual screen, this motion compensation units is arranged in a DVD player, and this method comprises:
Receive this first image and this second image;
Produce a virtual screen parameter and a block encoding image according to this image stunt; And
According to this virtual screen parameter and utilize this motion compensation units, to produce this virtual screen.
7. method as claimed in claim 6, wherein, this virtual screen parameter comprises a forms of motion (motion type) and a motion vector (motion vector).
8. method as claimed in claim 7, the step that wherein produces this virtual screen comprises:
Determine one to extract size according to this forms of motion;
Determine one to extract the address according to this motion vector;
Extract the address according to this and extract one from this second image, the size of this piece equals this extraction size;
Produce a moving compensating data according to this piece; And
Produce this virtual screen according to this moving compensating data.
9. method as claimed in claim 6, wherein, this virtual screen parameter comprises a forms of motion, a forward motion vector and a reverse motion vector.
10. method as claimed in claim 9, wherein, the step that produces this virtual screen comprises:
Determine one to extract size according to this forms of motion;
Determine one first to extract address and one second extraction address respectively according to this forward motion vector and this reverse motion vector;
Extract one first according to this first extraction address from this first image, this size of first equals this extraction size;
Extract one second according to this second extraction address from this second image, this size of second equals this extraction size; And
Carry out an interpolation to this first and this second and handle, to produce this virtual screen;
Wherein, this virtual screen is stored in a play buffer.
11. method as claimed in claim 10, wherein, this interpolation is handled and is comprised:
Change this video intensity of first;
Change this video intensity of second; And
Foundation changes this first and this second after the video intensity, produces this virtual screen.
12. method as claimed in claim 11, wherein, changing this first method with this video intensity of second is distinctly to multiply by one first transparency and one second transparency with this first and this second.
13. method as claimed in claim 12, wherein this first transparency and this second transparency are worth between one second value between one first, and this first transparency and this second transparency and be this second value.
14. method as claimed in claim 12, wherein this first transparency is 1/2
nForm, wherein, n is a positive integer.
15. method as claimed in claim 12, wherein, this first transparency and this second transparency give a default value individually according to each virtual screen.
16. method as claimed in claim 9, wherein, the step that produces this virtual screen comprises:
Determine one to extract size according to this forms of motion;
Determine one first to extract address and one second extraction address respectively according to this forward motion vector and this reverse motion vector;
Extract one first according to this first extraction address from this play buffer, this size of first equals this extraction size;
Extract one second according to this second extraction address from this second image, this size of second equals this extraction size; And
Carry out an interpolation to this first and this second and handle, and produce this virtual screen according to this and be stored in this play buffer;
Wherein, when initial, this play buffer stores this first image.
17. method as claimed in claim 16, wherein, this interpolation is handled and is comprised:
Change this video intensity of first;
Change this video intensity of second; And
Foundation changes this first and this second after the video intensity, produces this virtual screen.
18. method as claimed in claim 17, wherein, changing this first method with this video intensity of second is distinctly to multiply by one first transparency and one second transparency with this first and this second.
19. method as claimed in claim 18, wherein this first transparency and this second transparency are worth between one second value between one first, and this first transparency and this second transparency and be this second value.
20. method as claimed in claim 18, wherein this first transparency is 1/2
nForm, wherein, n is a positive integer.
21. method as claimed in claim 18, wherein, this first transparency and this second transparency give a default value individually according to each virtual screen.
22. method as claimed in claim 6, wherein, this block encoding image is zero.
23. one kind is utilized motion compensation units to realize the method for repeatedly changing the special play-back still image with one, be used to play one first image and one second image, and playing between this first image and this second image, broadcast at least one virtual screen, this motion compensation units is arranged in a DVD player, and this method comprises:
Receive this first image and this second image;
Produce a virtual screen parameter and a block encoding image according to this image stunt, this virtual screen parameter comprises a forms of motion, a forward motion vector and a reverse motion vector; And
According to this virtual screen parameter and utilize this motion compensation units, to produce this virtual screen.
24. method as claimed in claim 23, wherein, the step that produces this virtual screen comprises:
Determine one to extract size according to this forms of motion;
Determine one first to extract address and one second extraction address respectively according to this forward motion vector and this reverse motion vector;
Extract one first according to this first extraction address from this first image, this size of first equals this extraction size;
Extract one second according to this second extraction address from this second image, this size of second equals this extraction size; And
Carry out an interpolation to this first and this second and handle, to produce this virtual screen;
Wherein, this virtual screen is stored in a play buffer.
25. method as claimed in claim 24, wherein, this interpolation is handled and is comprised:
Change this video intensity of first;
Change this video intensity of second; And
Foundation changes this first and this second after the video intensity, produces this virtual screen.
26. method as claimed in claim 25, wherein, changing this first method with this video intensity of second is distinctly to multiply by one first transparency and one second transparency with this first and this second.
27. method as claimed in claim 26, wherein this first transparency and this second transparency are worth between one second value between one first, and this first transparency and this second transparency and be this second value.
28. method as claimed in claim 27, wherein this first transparency is 1/2
nForm, wherein, n is a positive integer.
29. method as claimed in claim 26, wherein, this first transparency and this second transparency give a default value individually according to each virtual screen.
30. method as claimed in claim 23, wherein, the step that produces this virtual screen comprises:
Determine one to extract size according to this forms of motion;
Determine one first to extract address and one second extraction address respectively according to this forward motion vector and this reverse motion vector;
Extract one first according to this first extraction address from this play buffer, this size of first equals this extraction size;
Extract one second according to this second extraction address from this second image, this size of second equals this extraction size; And
Carry out an interpolation to this first and this second and handle, and produce this virtual screen according to this and be stored in this play buffer;
Wherein, when initial, this play buffer stores this first image.
31. method as claimed in claim 30, wherein, this interpolation is handled and is comprised:
Change this video intensity of first;
Change this video intensity of second; And
Produce this virtual screen according to this first after the change video intensity and this second.
32. method as claimed in claim 31, wherein, changing this first method with this video intensity of second is distinctly to multiply by one first transparency and one second transparency with this first and this second.
33. method as claimed in claim 32, wherein this first transparency and this second transparency are worth between one second value between one first, and this first transparency and this second transparency and be this second value.
34. method as claimed in claim 33, wherein this first transparency is 1/2
nForm, wherein, n is a positive integer.
35. method as claimed in claim 32, wherein, this first transparency and this second transparency give a default value individually according to each virtual screen.
36. method as claimed in claim 23, wherein, this block encoding image is zero.
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| JP2002199408A (en) * | 2000-12-27 | 2002-07-12 | Matsushita Electric Ind Co Ltd | Moving image coding method and moving image coder |
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