CN1324886C - Processing device and method of digital video frequeney data - Google Patents
Processing device and method of digital video frequeney data Download PDFInfo
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Abstract
The present invention relates to a video processing device and a method thereof, which is used for decoding data for digital videos. The present invention is used for the transformation of the proportion of the appearance of video pictures for digital video data so as to generate built-in video data. The video processing device comprises a unit decoding and color mixing device for subsidiary pictures, a video mixer, a buffer memory and a built-in processor, wherein the unit decoding and color mixing device for subsidiary pictures is used for decoding and mixing colors of unit data of subsidiary pictures and outputs the unit data of a decoded subsidiary picture; the video mixer is then used for mixing the data of a main picture with the unit data of the decoded subsidiary picture; moreover, the video mixer outputs mixed video data; the buffer memory is used for storing the mixed video data output by the video mixer; the built-in processor is used for receiving the mixed video data and reading at least one previous mixed video data from the buffer memory; moreover, the built-in processor carries out built-in calculation according to the proportion of the appearance, the mixed video data and the previous mixed video data so as to generate the built-in video data.
Description
Technical field
The present invention is relevant for the video process apparatus and the method for a kind of digital video (video) data, and particularly, can be used as the conversion of the aspect ratio of video pictures relevant for video process apparatus and method in a kind of decode procedure that can be applicable to digital audio/video disk.
Background technology
In order to satisfy the user to the demand of the recording medium of high power capacity more, with the better video image quality and the demand of usability more easily, many tame leading firms advocate and join together, in 1996, formulated recording medium-digital audio/video disk (DVD)-specification, to replace traditional discs (is compactdisc, CD).In the DVD specification, the size of DVD discs is identical with traditional C D discs, but the data capacity of DVD discs can be higher than the CD discs of identical size dimension more than at least 7 times.Therefore, the ordered discs of DVD specification just can write down more video data, with more sharp use.In the DVD specification, the form of video disc sheet, be called the DVD-video form, in order to satisfy the demand of user to the video image quality, DVD-Video can adopt the preferred video compression format of video quality, (moving picture experts group 2, MPEG-2) standard compression techniques as video data is applied in the making of video disc sheet dynamic image compression standard 2.Really, DVD not only is used for the recording medium of record tone as content, but a kind of multi-functional recording medium, its form has expanded to as the recording medium of recording voice signal, as writeable recording medium and as on the purposes such as recording medium that can repeatedly read and write; Should there be the specification and the product of digital audio/video disk voice signal (DVD-Audio) CD, digital audio-video read-only disc (DVD-ROM), digital audio-video random read-write formula CD (DVD-RAM) to occur relatively.
For the user, in the video process apparatus that employed vision signal is decoded when the vision signal of DVD playing back-Video form, in DVD player (DVD player), it is exactly can do suitable adjustment at the aspect ratio (aspect ratio) of different display modes to handle that Video Out characteristics are arranged.That is to say,, when decoding, do the Video processing operation, adjust the video of output, be used to play the picture aspect ratio of the display unit of output video with cooperation for the video signal source of the picture aspect ratio of 16: 9 or 4: 3.In brief, before display unit, decoded video council is through the processing of picture convergent-divergent at output video.Generally speaking, the DVD playing device has multiple picture scaling pattern to cooperate the specification of different display unit.
For the user, the characteristics of another DVD-video are sprite (sub-picture) function that system provided.Traditional sprite, captions in the film (subtitles) for example are to be that key frame (main picture) is inseparable with film.In the DVD specification, sprite allows and the distinguishing coded system of key frame, and is stored among the bit stream (bit stream) of different MPEG-2, therefore, sprite become one independently sub-picture unit (sub-picture unit, SPU).If in the process of making DVD-video, producer's planning and foundation and key frame be the words of sub-picture unit independently, just can utilize the characteristics of sub-picture unit, offer the function of the multiple relevant sprite of user, for example allow the user can select to show the function such as captions, out of Memory of different language, or provide and allow the operating environment of function selecting Lay list of user and Play System interaction.The DVD discs can have maximum 32 tracks (tracks) to be used for purposes such as captions, that is to say, maximum 32 kinds of different captions can be provided.In addition, whether the user can be by controlling sprite as the DVD projector demonstration, and the setting of color.Though utilize sprite to show that captions or command selection Lay list function are to set when making the DVD-video video, but in each sprite, the number of color that can show can only be selected 4 kinds at most from 16 kinds of colors, this is owing to the toning information field of distributing to a sub-picture unit is 2.
When DVD playing back-video, the key frame data of mpeg encoded are decoded into and are main screen video, show sprite if set, main screen video just must be done the Video processing operation with the sub-picture unit video of gained behind the different decoding processes of process, and key frame is overlapped with sprite.Generally speaking, can be earlier various different types of bit streams differences be wherein come from bit stream that digital audio/video disk read, and the decoder under exporting to is done the operation of decoding via an analyzer (parser).For example, analyzer output video bit stream, message bit stream, sub-picture unit bit stream, video signal decoder, audio signal decoder, sub-picture unit decoder under these streams respectively have carry out decode operation.Video bit stream produces main picture video signal after decoding by video signal decoder; The sub-picture unit bit stream produces the sub-picture unit vision signal by behind the sub-picture unit decoder decode.Then, main picture video signal overlaps with the sub-picture unit vision signal, and the coincidence signal that is produced as television encoder (television encoder), is converted to the analog signal that TV is suitable for by display encoder.At last, by television set vision signal is shown.
As mentioned above, the DVD playing device has multiple picture scaling pattern to cooperate the specification of different display unit, and before display unit, decoded vision signal can be through the processing of picture convergent-divergent at outputting video signal.For example the video signal source of DVD-video discs is the vision signal that aspect ratio is recorded at 16: 9, and display unit is a traditional aspect ratio when being 4: 3 the television set of NTSC (NationalTelevision Standards Committee) system, and the DVD playing device just need carry out the processing of picture convergent-divergent.It should be noted that the sub-picture unit vision signal also has same demand except main picture video signal need carry out the processing of picture convergent-divergent, with the effect that keeps the quality of sprite, in different scaling patterns, all have making the user satisfied.If the sub-picture unit vision signal is not carried out the processing of convergent-divergent, then can produce the captions of sprite or the phenomenon generation that the font in the command selection Lay list is distorted.
About the decoding of sub-picture unit, video signal scaling, key frame the traditional way that overlaps, please refer to processing system for video shown in Figure 1 with sprite.The processing system for video of Fig. 1 mainly is divided into three parts, is respectively: main picture video signal convergent-divergent processing unit 10, sub-picture unit decoding/convergent-divergent processing unit 20, and the vision mixer 190 of key frame/sub-picture unit.In traditional way, at first, main screen video data behind 10 pairs of mpeg decodes of main picture video signal convergent-divergent processing unit, setting according to the aspect ratio pattern, with the main screen video data of interpolation method to input, carry out the processing of aspect ratio convergent-divergent, and the main picture video signal after the output processing.In addition, sub-picture unit decoding/convergent-divergent processing unit 20 receives the sub-picture unit bit stream, carry out the sub-picture unit decoding, and according to the setting of aspect ratio pattern, with interpolation method decoded sub-picture unit video data is carried out the processing of aspect ratio convergent-divergent, and the sub-picture unit vision signal after the output processing.At last, the main picture video signal and the sub-picture unit vision signal of inciting somebody to action after treatment by the vision mixer 190 of key frame/sub-picture unit overlap, and obtain needed coincidence video data.
In this processing system for video, be that the line (horizontal line) with horizontal direction is the unit of processing, and the scalable manner of key frame and corresponding sprite all is to adopt interpolation method (interpolation).With the example that is enlarged into of key frame, for example calculate the color data of trying to achieve the line that insert as weighted sum with the color data of the two-lines of adjacency in the key frame.Suppose VD
K-1, VD
kEach represents the color data of the whole or line segment wherein of k-1 and k bar line in the key frame, and after calculating key frame and being exaggerated, the color data of the line that should insert then can VD
K-1* W1+VD
k* W2 tries to achieve, and wherein W1 and W2 are weight number (weight); For the needs that dwindle or amplify of different aspect ratios, the weight number can be done suitable adjustment.
Because the convergent-divergent that has used interpolation method to carry out vision signal is handled, therefore, main picture video signal convergent-divergent processing unit 10, sub-picture unit decoding/convergent-divergent processing unit 20 have all respectively comprised two buffer storage and an interpolation processor.These buffer storage can be first in first out (first-in first-out, sequence FIFO).
Main picture video signal convergent-divergent processing unit 10 comprises a main screen video buffer storage 110, a main screen video stand-by buffer memory 120 and a main screen video interpolation processor 130.Main screen video buffer storage 110 is used to receive the decoded main screen video data VD that is exported from the video signal decoder (not shown).This video data can be temporary in the memory after video signal decoder output, and then, the one piece of data in delegation or the delegation is read from memory in the main screen video buffer storage 110.Main screen video stand-by buffer memory 120 is used to store the video data of last line, i.e. the video data that read of main screen video buffer storage 110.Owing to use the purpose of main screen video stand-by buffer memory 120, be in order to read the data of a last line in the memory of removing again the video data of exporting to temporary video signal decoder from, so the data that its capacity will can be stored sliver, and its size is fixed.And main screen video buffer storage 110 not necessarily will be used for depositing in sliver, a line segmentation can be deposited in, when bar section to be imported is handled soon, reads the data of next line segment again the memory of the video data of exporting from temporary video signal decoder.
Therefore, if want the picture aspect ratio of amplification video signal, according to above-mentioned interpolation ratio juris, main screen video buffer storage 110 provides the color data VD of present line segment
k, and main screen video stand-by buffer memory 120 provides the color data VD of the line segment of the vicinity that the last time reads
K-1, VD
k, VD
K-1Output to main screen video interpolation processor 130 simultaneously.Like this, main screen video interpolation processor 130 just can carry out the processing of interpolation method, and according to the setting of aspect ratio pattern, after calculating key frame and being exaggerated, the color data of the line segment that should insert is, for example VD
K-1* W1+VD
k* W2.
Sub-picture unit decoding/convergent-divergent processing unit 20, then comprise sub-picture unit stream buffer memory 140, sub-picture unit decoder 150, sub-picture unit stand-by buffer memory 160, sub-picture unit video regulating device 170 (SPU palette), and sub-picture unit video data interpolation processor 180.Sub-picture unit is run length code (RLC) (run-length code) coding, in each sub-picture unit, has comprised the view data of the sprite of desire demonstration.Sub-picture unit decoder 150 can carry out decode operation to the sub-picture unit bit stream SB (SPU bit stream) of input.Decode operation at first can be by solving colour coding among the SB, and the view data of the sprite of output desire demonstration is among sub-picture unit stand-by buffer memory 160, and by the color data of finding out in the sub-picture unit video regulating device 170 corresponding to this colour coding, i.e. Y/Cr/Cb value.In addition, the view data of the last sprite line segment that sub-picture unit video regulating device 170 is also exported with regard to sub-picture unit stand-by buffer memory 160 simultaneously, find out color data corresponding to this, and export the color data of present sprite line segment and the color data of this last sprite line segment in the lump.In addition, in order to regulate the data volume of the sub-picture unit bit stream SB that inputs to sub-picture unit decoder 150, sub-picture unit decoding/convergent-divergent processing unit 20 utilizes sub-picture unit stream buffer memory 140, in the mode of one piece of data, will input among the sub-picture unit decoder 150 without the sub-picture unit of sub-picture unit decoding.According to above-mentioned interpolation ratio juris,, suppose that sub-picture unit video regulating device 170 provides the color data of present line segment and the color data of last sprite line segment to be respectively SD if sprite need be amplified
k, SD
K-1Sub-picture unit video data interpolation processor 180 receives SD
k, SD
K-1Like this, sub-picture unit video data interpolation processor 180 just can carry out the processing of interpolation method, and according to the setting of aspect ratio pattern, the color data of calculating the sprite line segment that should insert after key frame is exaggerated for example is SD
K-1* W1+SD
k* W2.
At last, the output of main screen video interpolation processor 130 and sub-picture unit video data interpolation processor 180 can be passed through the mixed processing of the vision mixer 190 of key frame/sub-picture unit, obtains conforming to the vision signal VS that needs.
Needs for the change of the aspect ratio of key frame and sprite among traditional processing system for video, have utilized above-mentioned interpolation method to realize., the way of above-mentioned processing system for video from the angle of circuit design, has following several shortcomings: the one, and each needs the buffer storage of a standby usefulness main picture video signal and sub-picture unit vision signal.The 2nd, the sub-picture unit regulating device need carry out conversion operations to two sub-picture unit colour codings, the change-over circuit of this sub-picture unit regulating device must carry out conversion operations with frequency multiplication, or overlap identical circuit with two and do parallel processing, could cooperate the processing of interpolation method; , any method all can increase circuit size and cost.The 3rd, for main picture video signal and sub-picture unit vision signal, each needs a cover interpolation circuit to do the processing of interpolation method.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of video process apparatus and method exactly, be applied in the decoding of digital of digital video data, digital audio/video disk (Digital Versatile Disc for example, DVD) in the decoding, be used for video pictures, the processing of the conversion of aspect ratio to main picture video signal and sub-picture unit vision signal.According to video process apparatus of the present invention and method, relative circuit design will greatly be simplified, and make the cost of integrated circuit reduce.
According to purpose of the present invention, propose a kind of video process apparatus, be applied in the decoding of digital of digital video data, for example in the decoding of digital audio/video disk, be used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data.This video process apparatus comprises sub-picture unit decoding ager, a vision mixer, a buffer storage, and an interpolation processor.Sub-picture unit decoding ager (a sub-picture-decoding color-palette device) is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data.Vision mixer, sub-picture unit decoding ager connects therewith, then is to be used to mix these key frame data and these decoded sub-picture unit data, and exports a video data that mixes.And buffer storage is connected with this vision mixer, is used to store the video data of the mixing that this vision mixer exports.The interpolation processor, then be to be used for receiving the video data of this mixing and reading the video data of at least one last mixing from the buffering memory from this vision mixer, and carry out the interpolation method computing according to the video data of the video data of described aspect ratio, mixing and this last mixing at least, produce the video data of described interpolation.
According to purpose of the present invention, a kind of method for processing video frequency is proposed, be applied to be used for a digital of digital video data is done the conversion of the aspect ratio of video pictures in the decoding of digital of digital video data, to produce a video data.Wherein this digital of digital video data comprises at least one sub-picture unit data and at least one key frame data.This method for processing video frequency may further comprise the steps: (a) these sub-picture unit data are carried out decode operation, to export decoded sub-picture unit data; (b) mix these key frame data and these decoded sub-picture unit data, and export a video data that mixes; (c) store the video data of this mixing; (d) be received in the video data of the mixing of output in the step (b) and read the video data of at least one last mixing, and carry out the interpolation method computing according to the video data of the video data of an aspect ratio, this mixing and this last mixing at least, to produce this video data.Wherein this step (a) comprises, the sub-picture unit data are carried out decode operation, to produce the colour coding of a sub-picture unit image and a correspondence at least, and to change this colour coding be one group of color data, and wherein these decoded sub-picture unit data comprise this sub-picture unit image and this group color data.This kind method for processing video frequency also can be applicable to be used for the data of a digital audio/video disk are done the conversion of the aspect ratio of video pictures in the decoding of digital audio/video disk, to produce a video data.
According to purpose of the present invention, a kind of method for processing video frequency is proposed, be applied in the decoding of digital of digital video data, for example in the decoding of digital audio/video disk, be used for a digital of digital video data, for example the data of digital audio/video disk are done the conversion of the aspect ratio of video pictures, and wherein this digital of digital video data comprises a plurality of key frame data and a plurality of sub-picture unit data.This method for processing video frequency may further comprise the steps: (a) one of these sub-picture unit data are carried out decode operation, to export decoded sub-picture unit data; (b) mix one of these key frame data and these decoded sub-picture unit data, and export a video data that mixes; (c) store the video data of this mixing; (d) be received in the video data of the mixing of output in the step (b) and read the video data of at least one last mixing, and carry out the interpolation method computing according to the video data of the video data of an aspect ratio, this mixing and this last mixing at least, to produce a video data; (e) repeating step (a) is to (d), sequentially finishes until the transformation energy of the aspect ratio of these sub-picture unit data and these key frame data.Wherein step (a) comprises, the sub-picture unit data are carried out decode operation, producing the colour coding of a sub-picture unit image and a correspondence at least, and to change this colour coding be one group of color data, and wherein these decoded sub-picture unit data comprise this sub-picture unit image and this group color data.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows.
Description of drawings
Fig. 1 represents that tradition is used for the processing system for video that overlaps of the decoding of sub-picture unit, video signal scaling, key frame and sprite.
Fig. 2 represents the flow chart according to the method for processing video frequency of a preferred embodiment of the present invention.
Fig. 3 represents the video process apparatus according to the preferred embodiments of the present invention.
Fig. 4 represents to use the structure calcspar according to the example 1 of video process apparatus of the present invention.
Fig. 5 represents to use the structure calcspar according to the example 2 of video process apparatus of the present invention.
Fig. 6 represents to use the structure calcspar according to the example 3 of video process apparatus of the present invention.
The drawing reference numeral explanation
10: main picture video signal convergent-divergent processing unit
20: sub-picture unit decoding/convergent-divergent processing unit
110: the main screen video buffer storage
120: main screen video stand-by buffer memory
130: main screen video interpolation processor
140: the sub-picture unit stream buffer memory
150: the sub-picture unit decoder
160: sub-picture unit stand-by buffer memory
170: sub-picture unit video regulating device
180: sub-picture unit video interpolation processor
190,320: the vision mixer of key frame/sub-picture unit
300,300a, 300b, 300c: video process apparatus
310,310a, 310b, 310c: sub-picture unit decoding ager
330b, 330c: sub-picture unit decoder
340a, 340b, 340c: regulating device
350: the stand-by buffer memory
370: the interpolation processor
Embodiment
Please refer to Fig. 2, its expression is according to the flow chart of a kind of method for processing video frequency of one embodiment of the present invention.This method for processing video frequency can be applicable in the decoding of digital of digital video data, and for example (Digital Versatile Disc in decoding DVD), is used for the conversion of the aspect ratio (aspectratio) of video pictures, to produce a video data to digital audio/video disk.This method for processing video frequency may further comprise the steps.
At first, method begins, and execution in step 210 is carried out decode operation to sub-picture unit data, to export a decoded sub-picture unit data SD
kThen, enter step 220.In step 220, a key frame data VD
kWith this decoded sub-picture unit data SD
kCan be mixed, to export a video data MD who mixes
kAfterwards, execution in step 230 is stored the video data MD of this vision mixer
kAt last, the method execution in step 240 is to receive the video data MD of this mixing
kWith read the video data of at least one last mixing, and according to the video data MD of an aspect ratio, this mixing
kAnd the video data of this last mixing at least carries out the interpolation method computing, obtaining a video data VS, and exports this video data VS.
Rapid with regard to above-mentioned method below, explain.In step 210, these sub-picture unit data for example from the data of sprite bit stream (sub-picture bit stream), are the sub-screen image without decoding.And after decode operation is finished, can produce the colour coding of an at least one sub-picture unit image and a correspondence, and this colour coding can be converted into one group of color data, wherein this decoded sub-picture unit data SD
kComprise this sub-picture unit image and this group color data.One of for example, in the specification of DVD-Video, this colour coding is one of to represent in the multiple color with 2, for example, in one group of color setting by the user in the DVD-Video player.And the form of this color can represent with a kind of component video signal form (component video signal format), i.e. the Y/Cr/Cb value.That is to say that in step 210,2 colour coding can be converted into this represented group color data of this kind component video signal form (being Y/Cr/Cb).
In this method for processing video frequency, the image processing unit of picture with the line (horizontal line) of the horizontal direction in the picture as the unit that handles, for example one piece of data in multirow, delegation or the delegation.Preferred way is to handle with one section in the delegation.Therefore, among step 220, these key frame data VD
k, be the main picture video signal of having decoded, as one section in the delegation in the key frame.If video signal source is encoded with MPEG-2, just comprised in this main picture video signal that main picture image reaches the color data corresponding to this image, i.e. Y/Cr/Cb value.In addition, the video data MD of this mixing
k, key frame data VD thus
kWith this decoded sub-picture unit data SD
kMix gained, for example can be expressed as:
MD
k=VD
k* MP_ratio+SD
k* SPU_ratio, (formula 1)
Wherein, MP_ratio and SPU_ratio respectively are adjustable coefficient.
In step 230, the video data MD of this vision mixer
kCan be stored, for the usefulness in the step 240.
In step 240, by the video data MD of the mixing that step 220 produced
kCan be received.In addition, the video data of at least one last mixing can be read.For example, last when once carrying out this method for processing video frequency, (be expressed as MD by the video data of the mixing that step 220 produced
K-1) can be read.The video data of this last mixing, is stored into by execution in step 230 when once carrying out this method for processing video frequency last.Moreover video data VS is according to the setting of aspect ratio, the video data MD of this mixing
kAnd the video data MD of this last mixing at least
K-1Carry out interpolation method computing gained.For example,, calculate with weighted sum with the color data of two lines of adjacency, as follows to obtain video data VS:
VS=MD
K-1* weight
0+ MD
k* weight
1, (formula 2)
Wherein W1 and W2 are weight number (weight); For the needs that dwindle or amplify of different aspect ratios, the weight number can be done suitable adjustment.
Suppose that in step 220 adopted the key frame of formula 1 representative and the hybrid mode of sub-picture unit vision signal, then formula 2 can be expressed as:
VS＝MD
k-1×weight
0+MD
k×weight
1
＝(VD
k-1×MP_ratio+SD
k-1×SPU_ratio)×weight
0+(VD
k×MP-ratio+SD
k×SPU_ratio)×weight
1
＝(VD
k-1×weight
0+VD
k×weight
1)×MP_ratio+(SD
k-1×weight
0+SD
k×weight
1)×SPU_ratio
=interpolated_MP * MP_ratio+interpolated_SPU * SPU_ratio, (formula 3)
Wherein, interpolated_MP represents the result of main picture video signal interpolation, and interpolated_SPU represents the result of sub-picture unit video data interpolation.Hence one can see that, according to method for processing video frequency of the present invention, in step 240, carry out after the interpolation method computing video data VS of gained, be equivalent to main screen video data and sub-picture unit video data after the computing of the interpolation method by separately respectively, again the result of mixing.
For the digital of digital video data of continuous input, as the DVD-Video video data, in the process of digital video data decoding, repeat this method for processing video frequency, just can be according to the mode initialization of different aspect ratios, do the conversion of the aspect ratio of video pictures, to obtain the output of video data.For example, during film in DVD playing back-Video discs, the resolution of each picture is 720 * 480 pixels, by method for processing video frequency of the present invention, decoded key frame and sprite, be converted to the vision signal that is applicable to wide screen (being that the display frame wide high proportion is 16: 9 a display screen) with output.As for the conversion of other various aspect ratio patterns,, all can realize the conversion of different aspect ratios by above-mentioned method for processing video frequency as pan mentioned in the DVD specification (panned) and letter frame (letterboxed) kenel.Moreover method of the present invention is not limited to these ratios, and the conversion of other any aspect ratio all can realize.
Among the embodiment of above-mentioned method for processing video frequency, though mentioning interpolation method is to utilize the color data of image of line segment of two vicinities as the basis of interpolation method operation result, but can push away from formula 3, above-mentioned method for processing video frequency can also utilize other interpolation method to realize purpose.For example, interpolation method based on the color data of the image of three contiguous line segments, or based on the interpolation method of the color data of the image of many contiguous line segments, all can be used among the method for processing video frequency of the present invention, with the effect of the aspect ratio change that reaches key frame and sprite.
Please refer to Fig. 3, its expression is according to a preferred embodiment of video process apparatus of the present invention.This video process apparatus 300 can be applicable in the decoding of digital of digital video data, is used for setting, key frame data and sub-picture unit data according to aspect ratio, and the video data of output interpolation is with the purpose of the aspect ratio conversion that realizes video pictures.For example, in the decoding of carrying out digital audio/video disk, this video process apparatus 300 can be used for setting, key frame data and the sub-picture unit data according to aspect ratio, and the video data of output interpolation is with the purpose of the aspect ratio conversion that realizes DVD-Video.And for example, this video process apparatus 300 at other comprises sub-picture unit decoding ager 310, a vision mixer, a buffer storage and an interpolation processor 370.
Sub-picture unit decoding ager 310 is used for these sub-picture unit data are decoded, to export decoded sub-picture unit data.
This vision mixer, for example the vision mixer 320 of one key frame/sub-picture unit is used to mix these key frame data and these decoded sub-picture unit data, and exports a video data that mixes.The vision mixer 320 of this key frame/sprite can be realized with multiplier.
As for buffer storage, a stand-by buffer memory 350 for example, then the vision mixer 320 of key frame/sub-picture unit connects therewith, is used to store the video data of this mixing that the vision mixer 320 of this key frame/sub-picture unit exported.This stand-by buffer memory 350 is used for the vision mixer 320 of standby this key frame/sub-picture unit and exports the video data that mixes in the past, to supply with the usefulness of interpolation processor 370.
Simultaneously with reference to figure 2, Fig. 3 and described method for processing video frequency, we can learn, this sub-picture unit decoding ager 310 can be used for execution in step 210.The vision mixer 320 of this key frame/sub-picture unit can be used for execution in step 220.Stand-by buffer memory 350 then is used for performing step 230.At last, 370 of interpolation processors can be used as execution in step 240.Hence one can see that, and this video process apparatus 300 can be applicable in the decoding of digital of digital video data, is used for setting, key frame data and sub-picture unit data according to aspect ratio, and the video data of output interpolation is with the conversion of the aspect ratio of realizing video pictures.Moreover, as above-mentioned method for processing video frequency of the present invention, this video process apparatus 300 can be done the conversion of any aspect ratio to key frame and sprite, the interpolation method that also can utilize other is in this video process apparatus 300, with the effect of the aspect ratio change that reaches key frame and sprite.
With respect to the known technology of Fig. 1, the circuit design of this video process apparatus 300 is more simplified.In the known technology of Fig. 1, respectively need a cover stand-by buffer memory for sprite and key frame, but 300 needs of this video process apparatus, one cover, promptly the stand-by buffer memory 350.In addition, as shown in Figure 1, each needs a cover interpolation processor Video processing of sub-picture unit and key frame, but 300 needs of this video process apparatus, one cover, promptly the interpolation processor 370.Moreover because component number has reduced, the wiring number of integrated circuit also reduces thereupon.Therefore, circuit design and layout will greatly simplify.So the cost of integrated circuit reduces.
In addition, it should be noted that the structure of relevant sub-picture unit decoding ager 310, wherein relate to regulating device (color palette).In this video process apparatus 300, after the data decode of 310 pairs of sub-picture unit of sub-picture unit decoding ager, produce decoded sub-picture unit data, for example SD
kAfterwards, the vision mixer 320 of key frame/sub-picture unit can receive sub-picture unit data SD
k, and make SD
kWith key frame data VD
kMix, with the video data of output mixing, as MD
kTherefore, handle sub-picture unit data SD at the vision mixer 320 of key frame/sub-picture unit
kIn, SD
kThe color data that must comprise the image of sprite.That is the colour coding in the sub-image data need be converted into corresponding color data, i.e. Y/Cr/Cb, and this color data is contained in decoded sub-picture unit data SD
kAmong.In the video process apparatus 300 of this preferred embodiment, sub-picture unit decoding ager 310 has been integrated the function of colour coding conversion, the i.e. function of regulating device; So after sub-picture unit data were through decoding, color data was contained in decoded sub-picture unit data SD
kAmong.And the function of regulating device is found out the pairing color data of colour coding in these sub-picture unit data, and is exported this color data mainly by from the question blank (look-up table) of one group of color data.
Except sub-picture unit cell data decoder design having the function of integrating regulating device as the sub-picture unit of Fig. 3 decoding ager 310, according to the present invention, sub-picture unit decoding ager can be handled the function that colour coding is converted to color data by regulating device independently.And this regulating device can have different annexations with other element among according to video process apparatus of the present invention.Therefore, with regard to the design of circuit, circuit design and layout are just more flexible.Because at synchronization, have only the colour coding of the view data of a collection of sub-picture unit need carry out the transcoding of colour coding.By comparison, known technology but needs to handle simultaneously the conversion of two colour codings.So video process apparatus of the present invention does not need making this regulating device in fact, needn't overlap the conversion that circuit come the parallel processing colour coding with two yet with the circuit of frequency multiplication.Moreover, if video process apparatus of the present invention is used other interpolation method, for example based on the interpolation method of the color data of the image of three contiguous line segments, to reach more accurate interpolation result's words, video process apparatus of the present invention also only need be at synchronization, and the colour coding conversion of handling a collection of sub-picture unit just can realize.So according to video process apparatus of the present invention, the complexity of circuit design just more reduces, and can more reduce cost.Below, illustrate with regard to several possible sub-picture unit decoding ager execution modes.
Please refer to Fig. 4, the structure calcspar according to the example 1 of video process apparatus of the present invention is used in its expression.Video process apparatus 300a has comprised sub-picture unit decoding ager 310a, the vision mixer 320 of key frame/sub-picture unit, stand-by buffer memory 350, and interpolation processor 370.As video process apparatus 300a such as the video process apparatus 300, be used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data.
Sub-picture unit decoding ager 310a has then comprised a regulating device 340a.Sub-picture unit decoding ager 310a is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data, for example a SD
kThis sub-picture unit decoding ager 310a from the sub-picture unit data, solves a colour coding C, and this decoded sub-picture unit data SD-
kComprise one group of color data, i.e. Y/Cr/Cb value, this group color data is corresponding to colour coding C.
In addition, data volume for the main screen video data VD behind the mpeg decode of regulating the vision mixer 320 that inputs to key frame/sub-picture unit, in the example 1 of this application, utilized main screen video buffer storage 110, and with the delegation of key frame or the mode of the one piece of data in the delegation, main screen video data VD behind the mpeg decode is read in the main screen video buffer storage 110, again by main screen video buffer storage 110 key frame data, for example VD
k, export among the vision mixer 320 of key frame/sub-picture unit.On the other hand, in order to regulate the data volume of the sub-picture unit bit stream SB that inputs to sub-picture unit decoding ager 310a, in the example 1 of this application, utilize sub-picture unit stream buffer memory 140, in the mode of one piece of data, will input to without the sub-picture unit data of sub-picture unit decoding among the sub-picture unit decoding ager 310a.
Thus, decoded sub-picture unit data SD-
kAnd the main screen video data VD behind the mpeg decode
k, together be input among the vision mixer 320 of key frame/sub-picture unit, with the processing that mixes.Then, the video data MD of the vision mixer 320 output mixing of key frame/sub-picture unit
kThe video data MD of stand-by buffer memory 350 these mixing of storage
k, for the usefulness of interpolation processor 370.Interpolation processor 370 then receives the video data MD of this mixing
k, and from stand-by buffer memory 350, read the video data of at least one last mixing, for example MD
K-1, and according to the video data MD of described aspect ratio, this mixing
kAnd the video data MD of this last mixing at least
K-1Carry out the interpolation method computing, produce the video data VS of this interpolation.In addition, if interpolation processor 370 utilizes the data of a last line in the same picture to do the interpolation method computing, the data that the capacity of stand-by buffer memory 350 will can be stored sliver, and also its size is fixed for example 720 * 8 * 2.
Please refer to Fig. 5, the structure calcspar according to the example 2 of video process apparatus of the present invention is used in its expression.Video process apparatus 300b has comprised sub-picture unit decoding ager 310b, the vision mixer 320 of key frame/sub-picture unit, stand-by buffer memory 350, and interpolation processor 370.For the data volume of the main screen video data of regulating input and sub-picture unit data so, in this application example 2, also used main screen video buffer storage 110 and sub-picture unit stream buffer memory 140.Video process apparatus 300b is used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data as video process apparatus 300.
Sub-picture unit decoding ager 310b is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data, for example a SD
kDifferent with sub-picture unit in the described application example 1 decoding ager 310a is that sub-picture unit decoding ager 310b comprises a sub-picture unit decoder 330b and a regulating device 340b.Sub-picture unit decoder 330b is connected with the vision mixer 320 of key frame/sub-picture unit, is used for these sub-picture unit data are carried out the sub-picture unit decode operation, to produce the colour coding of an at least one sub-picture unit image and a correspondence.The for example locations of pixels and 2 the corresponding colour coding of the sprite that shows of a desire.As for regulating device 340b, then sub-picture unit decoder 330b connects therewith, and being used to change this colour coding is one group of color data, Y/Cr/Cb value for example, wherein decoded sub-picture unit data SD
kComprise this group color data.As for other element and How It Works thereof, since identical with described application example 1, do not repeat them here.
Please refer to Fig. 6, the structure calcspar according to the example 3 of video process apparatus of the present invention is used in its expression.Video process apparatus 300c has comprised sub-picture unit decoding ager 310c, the vision mixer 320 of key frame/sub-picture unit, stand-by buffer memory 350, and interpolation processor 370.In this application example 3, also used main screen video buffer storage 110 and sub-picture unit stream buffer memory 140, with the main screen video data of regulating input and the data volume of sub-picture unit data.Video process apparatus 300c is used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data as video process apparatus 300.
Sub-picture unit decoding ager 310c is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data, for example a SD
kSub-picture unit decoding ager 310c comprises a sub-picture unit decoder 330c and a regulating device 340c.Different with sub-picture unit in the described application example 2 decoding ager 310b is, this regulating device 340c vision mixer 320 of sub-picture unit decoder 310c and this key frame/sub-picture unit therewith connects.This sub-picture unit decoder 310c is used for these sub-picture unit data are carried out the sub-picture unit decode operation, with the colour coding (as 2 colour coding) that produces an at least one sub-picture unit image and a correspondence.This regulating device 340c, being used to change this corresponding colour coding is one group of color data, wherein this decoded sub-picture unit data SD
kComprise this group color data, i.e. Y/Cr/Cb value, wherein decoded sub-picture unit data SD
kComprise this group color data.As for other element and How It Works thereof, since identical with described application example 1, do not repeat them here.
The invention effect
Disclosed video process apparatus of the above embodiment of the present invention and method, can be applicable among the decoding of digital video image, for example in the decoding of digital audio/video disk, be used for main screen video data and sub-picture unit data, carry out the aspect ratio conversion of video pictures, the processing that makes video pictures can amplify arbitrarily and dwindle.
Compare with known technology, owing to need fewer purpose interpolation processor and stand-by buffer memory according to video process apparatus of the present invention, the wiring number of integrated circuit also reduces thereupon.Therefore, circuit design and layout will simplify for it, and cost is reduced.Regulating device can have different connections or syntagmatic with other element among according to video process apparatus of the present invention.Therefore, circuit design and layout are just more flexible.In addition, according to video process apparatus of the present invention, do not need making this regulating device in fact, needn't come the conversion of two colour codings of parallel processing yet with the circuit of frequency multiplication with two cover circuit.So the complexity of its circuit design just more reduces, and can more reduce cost.In a word, according to method for processing video frequency of the present invention and device, circuit design will greatly be simplified, and make the cost of integrated circuit reduce.
In sum; though the present invention with a preferred embodiment openly as above; so it is not to be used to limit the present invention; any those skilled in the art; under the situation that does not break away from design of the present invention and scope; can carry out various changes and improvement, so protection scope of the present invention is as the criterion with the claim restricted portion that is proposed.
Claims (21)
1. a video process apparatus is applied in the decoding of digital of digital video data, is used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data, and this video process apparatus comprises:
One sub-picture unit decoding ager is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data;
One vision mixer is connected with this sub-picture unit decoding ager, is used to mix these key frame data and these decoded sub-picture unit data, and exports a video data that mixes;
One buffer storage is connected with this vision mixer, is used to store the video data of this mixing that this vision mixer exports; And
One interpolation processor, be used for receiving the video data of this mixing and reading the video data of at least one last mixing from the buffering memory from this vision mixer, and carry out the interpolation method computing according to the video data of the video data of this aspect ratio, this mixing and this last mixing at least, produce the video data of this interpolation.
2. video process apparatus as claimed in claim 1, wherein this sub-picture unit decoding ager solves a colour coding from these sub-picture unit data, and these decoded sub-picture unit data comprise one group of color data, wherein should group color data corresponding to this colour coding.
3. video process apparatus as claimed in claim 2, wherein this sub-picture unit decoding ager comprises a regulating device, this regulating device is used to produce this group color data.
4. video process apparatus as claimed in claim 2, wherein this color data is represented with a component video signal form.
5. video process apparatus as claimed in claim 4, wherein this component video signal form is Y/Cr/Cb.
6. video process apparatus as claimed in claim 1, wherein this sub-picture unit decoding ager comprises:
One sub-picture unit decoder is connected with this vision mixer, is used for these sub-picture unit data are carried out the sub-picture unit decode operation, to produce the colour coding of an at least one sub-picture unit image and a correspondence; And
One regulating device is connected with this sub-picture unit decoder, and being used to change this colour coding is one group of color data, and wherein these decoded sub-picture unit data comprise this group color data.
7. video process apparatus as claimed in claim 1, wherein this sub-picture unit decoding ager comprises:
One sub-picture unit decoder is used for these sub-picture unit data are carried out the sub-picture unit decode operation, to produce the colour coding of an at least one sub-picture unit image and a correspondence; And
One regulating device is connected with this sub-picture unit decoder and this vision mixer, and being used to change this corresponding colour coding is one group of color data, and wherein these decoded sub-picture unit data comprise this group color data.
8. a video process apparatus is applied in the decoding of digital audio/video disk, is used for producing the video data of an interpolation according to an aspect ratio, key frame data and sub-picture unit data, and this video process apparatus comprises:
One sub-picture unit decoding ager is used for the processing of decoding and mix colours of these sub-picture unit data, and exports decoded sub-picture unit data;
One vision mixer is connected with this sub-picture unit decoding ager, is used to mix these key frame data and these decoded sub-picture unit data, and exports a video data that mixes;
One buffer storage is connected with this vision mixer, is used to store the video data of this mixing that this vision mixer exports; And
One interpolation processor, be used for receiving the video data of this mixing and reading the video data of at least one last mixing from the buffering memory from this vision mixer, and carry out the interpolation method computing according to the video data of the video data of this aspect ratio, this mixing and this last mixing at least, produce the video data of this interpolation.
9. video process apparatus as claimed in claim 8, wherein this sub-picture unit decoding ager solves a colour coding from these sub-picture unit data, and these decoded sub-picture unit data comprise one group of color data, wherein should group color data corresponding to this colour coding.
10. video process apparatus as claimed in claim 9, wherein this sub-picture unit decoding ager comprises a regulating device, this regulating device is used to produce this group color data.
11. video process apparatus as claimed in claim 9, wherein this color data is represented with a component video signal form.
12. video process apparatus as claimed in claim 11, wherein this component video signal form is Y/Cr/Cb.
13. video process apparatus as claimed in claim 8, wherein this sub-picture unit decoding ager comprises:
One sub-picture unit decoder is connected with this vision mixer, is used for these sub-picture unit data are carried out the sub-picture unit decode operation, to produce the colour coding of an at least one sub-picture unit image and a correspondence; And
One regulating device is connected with this sub-picture unit decoder, and being used to change this colour coding is one group of color data, and wherein these decoded sub-picture unit data comprise this group color data.
14. video process apparatus as claimed in claim 8, wherein this sub-picture unit decoding ager comprises:
One sub-picture unit decoder is used for these sub-picture unit data are carried out the sub-picture unit decode operation, to produce the colour coding of an at least one sub-picture unit image and a correspondence; And
One regulating device is connected with this sub-picture unit decoder and this vision mixer, and being used to change this corresponding colour coding is one group of color data, and wherein these decoded sub-picture unit data comprise this group color data.
15. method for processing video frequency, be applied in the decoding of digital of digital video data, be used for a digital of digital video data is done the conversion of the aspect ratio of video pictures, to produce a video data, wherein this digital of digital video data comprises at least one key frame data and sub-picture unit data, and this method for processing video frequency may further comprise the steps:
(a) these sub-picture unit data are carried out decode operation, to export decoded sub-picture unit data;
(b) mix these key frame data and these decoded sub-picture unit data, and export a video data that mixes;
(c) store the video data of this mixing; And
(d) be received in the video data of the mixing of output in the step (b) and read the video data of at least one last mixing, and carry out the interpolation method computing according to the video data of the video data of an aspect ratio, this mixing and this last mixing at least, to produce this video data.
16. method for processing video frequency as claimed in claim 15, wherein this step (a) comprises, the sub-picture unit data are carried out decode operation, to produce the colour coding of a sub-picture unit image and a correspondence at least, and to change this colour coding be one group of color data, and wherein these decoded sub-picture unit data comprise this sub-picture unit image and this group color data.
17. method for processing video frequency, be applied in the decoding of digital audio/video disk, be used for the data of a digital audio/video disk are done the conversion of the aspect ratio of video pictures, to produce a video data, wherein the data of this digital audio/video disk comprise at least one sub-picture unit data and key frame data, and this method for processing video frequency may further comprise the steps:
(a) these sub-picture unit data are carried out decode operation, to export decoded sub-picture unit data;
(b) mix these key frame data and these decoded sub-picture unit data, and export a video data that mixes;
(c) store the video data of this mixing; And
(d) be received in the video data of the mixing of output in the step (b) and read the video data of at least one last mixing, and carry out the interpolation method computing according to the video data of the video data of an aspect ratio, this mixing and this last mixing at least, to produce this video data.
18. method for processing video frequency as claimed in claim 17, wherein this step (a) comprises, the sub-picture unit data are carried out decode operation, to produce the colour coding of a sub-picture unit image and a correspondence at least, and to change this colour coding be one group of color data, and wherein these decoded sub-picture unit data comprise this sub-picture unit image and this group color data.
19. method for processing video frequency, be applied in the decoding of digital of digital video data, be used for a digital of digital video data is done the conversion of the aspect ratio of video pictures, wherein this digital of digital video data comprises a plurality of key frame data and a plurality of sub-picture unit data, and this method for processing video frequency may further comprise the steps:
(a) one of described a plurality of sub-picture unit data are carried out decode operation, to export decoded sub-picture unit data;
(b) mix one of described key frame data and these decoded sub-picture unit data, and export a video data that mixes;
(c) store the video data of this mixing; And
(d) be received in the video data of the mixing of output in the step (b) and read the video data of at least one last mixing, and carry out the interpolation method computing according to the video data of the video data of an aspect ratio, this mixing and this last mixing at least, to produce a video data; And
(e) repeating step (a) is to (d), sequentially finishes until the transformation energy of the aspect ratio of described sub-picture unit data and described key frame data.
20. method for processing video frequency as claimed in claim 19, wherein this step (a) comprises, the sub-picture unit data are carried out decode operation, to produce the colour coding of a sub-picture unit image and a correspondence at least, and to change this colour coding be one group of color data, and wherein these decoded sub-picture unit data comprise this sub-picture unit image and this group color data.
21. method for processing video frequency as claimed in claim 19, the wherein decoding that is decoded as digital audio/video disk of this digital of digital video data, and this digital of digital video data is the data of digital audio/video disk.
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| CNB021414475A CN1324886C (en) | 2002-08-30 | 2002-08-30 | Processing device and method of digital video frequeney data |
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| CNB021414475A CN1324886C (en) | 2002-08-30 | 2002-08-30 | Processing device and method of digital video frequeney data |
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| US20100166056A1 (en) * | 2002-12-10 | 2010-07-01 | Steve Perlman | System and method for encoding video using a selected tile and tile rotation pattern |
| WO2012006786A1 (en) * | 2010-07-15 | 2012-01-19 | Mediatek Singapore Pte. Ltd. | Video processing apparatus and method for simultaneously displaying a plurality of video signals on display device |
| US9998749B2 (en) | 2010-10-19 | 2018-06-12 | Otoy, Inc. | Composite video streaming using stateless compression |
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| US5111297A (en) * | 1989-08-04 | 1992-05-05 | Matsushita Electric Industrial Co., Ltd. | Picture-in-picture double-scanning television receiver |
| JPH089281A (en) * | 1994-06-24 | 1996-01-12 | Hitachi Ltd | Television signal processor |
| JPH0951490A (en) * | 1995-06-02 | 1997-02-18 | Matsushita Electric Ind Co Ltd | Vertical compression circuit for sub image video signal |
| JPH11308550A (en) * | 1998-04-17 | 1999-11-05 | Matsushita Electric Ind Co Ltd | Television receiver |
| JP2001169199A (en) * | 1999-12-08 | 2001-06-22 | Nec Corp | Circuit and method for correcting subtitle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111297A (en) * | 1989-08-04 | 1992-05-05 | Matsushita Electric Industrial Co., Ltd. | Picture-in-picture double-scanning television receiver |
| JPH089281A (en) * | 1994-06-24 | 1996-01-12 | Hitachi Ltd | Television signal processor |
| JPH0951490A (en) * | 1995-06-02 | 1997-02-18 | Matsushita Electric Ind Co Ltd | Vertical compression circuit for sub image video signal |
| JPH11308550A (en) * | 1998-04-17 | 1999-11-05 | Matsushita Electric Ind Co Ltd | Television receiver |
| JP2001169199A (en) * | 1999-12-08 | 2001-06-22 | Nec Corp | Circuit and method for correcting subtitle |
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