CN1323376C - Moving self adaption sequencely scanning device and method using code information as base - Google Patents
Moving self adaption sequencely scanning device and method using code information as base Download PDFInfo
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- CN1323376C CN1323376C CNB021421293A CN02142129A CN1323376C CN 1323376 C CN1323376 C CN 1323376C CN B021421293 A CNB021421293 A CN B021421293A CN 02142129 A CN02142129 A CN 02142129A CN 1323376 C CN1323376 C CN 1323376C
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Abstract
The present invention puts forward a motion self-adaptive sequential scanning device using coded information as the basis. The sequential scanning device comprises an MPEG2 decoder, a frame buffer, a motion information processing unit and a playing unit, wherein the MPEG2 decoder is used for receiving data coded by MPEG2 and generating coded information and image data after the MPEG2 decoder decodes the coded data; the frame buffer is used for provisionally storing the image data; the motion information processing unit is used for receiving the coded information and generating the motion information of images according to the coded information; the playing unit is used for playing the image data of the frame buffer in different conversion modes according to the motion information. Therefore, the sequential scanning device can judge the motion degree of the macro blocks of the images only by using the coded information generated by the MPEG2 decoder.
Description
Technical field
The present invention relates to about Motion Adaptive P-SCAN device and method based on coded message.
Background technology
In the video coding technique of MPEG2 (moving picture expert group 2), the coding method of image is mainly divided into three kinds: I image (in-frame encoding picture), P image (predictive-coded picture) and B image (bidirectionally predictive coded picture).The I image is the coding method in the frame, when decoding and the frame of front and back do not have correlativity.P image and B image then are the coding methods with motion compensation.In when coding, the P image can be to analysiss of taking exercises of last reference picture, and the B image is respectively reference picture analysis of taking exercises forwards, backwards then.Figure 1 shows that an example of image output in the MPEG2 specification.As shown in the drawing, each opens the P image is by last reference picture, and for example the motion compensation of I image or P image and coding are formed.Motion compensation unit in the MPEG2 specification is the macro block (macro-block) of the matrix of 16 * 16 picture element sizes.May accompany several B images between P image and last reference picture.Scrambler can be found out suitable motion vector at image and its reference picture comparative analysis when coding.
In order to improve the resolution of MPEG2 video pictures, playing device can convert the video pictures of interlacing to the video pictures of P-SCAN.And when converting the video pictures of interlacing the video pictures of P-SCAN to, method commonly used has method of interweaving (weave method) and figure interpolation field method (fieldinterpolation method).The what is called method that interweaves is with the demonstration that interweaves mutually of last figure field (top field) and figure below field (bottom field).Method can be because of the mobile pectination (comb) that causes that exists between the figure field but this interweaves.And so-called figure interpolation field rule is to utilize single figure field, calculates the image values of another figure field, but because of the basic restriction of signal theory, is difficult to reach high-resolution image quality.
In order to solve the shortcoming of above-mentioned interweave method and figure interpolation field method, the conversion of a kind of Motion Adaptive (motionadaptive method) P-SCAN is proposed.Figure 2 shows that the block diagram of general motion self-adaptation P-SCAN conversion equipment.As shown in the drawing, this Motion Adaptive P-SCAN conversion equipment comprises one frame buffer 22, a Motion Adaptive processing unit 23 and a display unit 24.Frame buffer 22 is used to store the frame data that MPEG2 demoder 21 is exported.This Motion Adaptive P-SCAN conversion equipment utilizes Motion Adaptive processing unit 23 that several pictures of front and back in the frame buffer 22 are done universe computing comparison, and determining each pixel thus is to belong to motion or static.For example, static if pixel belongs to, then use the method conversion that interweaves, do not move so can not produce pectination and resolution is higher because of not existing between figure; If pixel belong to motion then use figure interpolation field method change.Though this Motion Adaptive P-SCAN conversion method can solve above-mentioned shortcoming,, be the very high method of a kind of cost because must do universe computing comparison at several pictures of the front and back in the frame buffer.
Summary of the invention
In view of the above problems, the objective of the invention is to propose a kind of the needs several pictures before and after in the frame are done universe computing comparison, but based on the Motion Adaptive P-SCAN device and method of coded message.
The invention provides a kind of Motion Adaptive P-SCAN device based on coded message, this device comprises: a MPEG2 demoder is used to receive the MPEG2 coded data and this coded data decoding back is produced coded message and view data; One frame buffer is used for keeping in described view data; One movement degree information process unit is used to receive described coded message, and produces the movement degree information of each image according to this coded message; And a broadcast unit, be used for playing in the different switching mode the described view data of described frame buffer according to described movement degree information.
The present invention also provides a kind of Motion Adaptive P-SCAN method based on coded message, this method comprises the following step: the decoding step, utilize the MPEG2 demoder to receive the MPEG2 coded data, and will produce coded message and view data after this coded data decoding, and view data is stored in frame buffer; Movement degree information produces step, is used to receive described coded message, and produces the movement degree information of each piece in each image according to this coded message; And the broadcast step, be used for playing in the different switching mode the described view data of described frame buffer according to the movement degree information of described each piece.
Therefore, this P-SCAN device coded message that only need utilize the MPEG2 demoder to be produced can be judged the movement degree of the macro block of each image.
Description of drawings
Figure 1 shows that an example of image output in the MPEG2 specification.
Figure 2 shows that the block diagram of general motion self-adaptation P-SCAN conversion equipment.
Fig. 3 has shown the example of each regional type of sports in the image.
Fig. 4 is the block diagram of the present invention based on the Motion Adaptive P-SCAN device of coded message.
Fig. 5 has shown the block diagram of movement degree information process unit among the present invention.
Fig. 6 has shown that the flow process control module produces the judgement flow process of movement degree information according to I, P, three kinds of images of B.
Graphic numbering
41 MPEG2 demoders
42 frame buffers
43 movement degree information process units
431 flow process control modules
432 MV (motion vector) processing unit
433 DCT processing units
434 motion decision unit
435 movement degree record cells
44 play display unit
Embodiment
By below with reference to accompanying drawing in detail, the Motion Adaptive P-SCAN device and method of the present invention based on coded message will be described.
According to the video coding technique of MPEG2, the macro block of every type image all has several classification, and for example the macro block of P image has following several classification:
One, intra-macroblock (Intra macro-block): represent the degree of variation of this macro block and last reference picture too big, be not suitable for removing coding with the mode of motion compensation.
Two, motion compensation and coded macroblocks (MC﹠amp; Coded Macro-block): represent this macro block can add coding compensation reduction by some macro blocks of last reference picture, this corresponding macro block position is with the mode record of motion vector, and compensate component is with DCT (discrete cosine transform) coded system record.
Three, coded macroblocks (Coded Macro-block): macro block adds the coding compensation by the macro block of last reference picture same position and forms.
Four, motion compensation macro block (MC Macro-block): the macro block of macro block and last reference picture another location is identical.
Five, omit formula macro block (Skip macroblock): the macro block of macro block and last reference picture same position is identical.
By above classification as can be seen, judged according to the information in the decode procedure whether can distinguish each macro block is motion, as shown in Figure 3, wherein S represents static block, and M represents moving mass.Therefore, the present invention promptly judges that according to the pattern of each macro block of each image this macro block is motion or static, and needn't do universe computing comparison at several pictures before and after in the frame, and then saves the computing cost.
Fig. 4 is the block diagram of the present invention based on the Motion Adaptive P-SCAN device of coded message.As shown in the drawing, Motion Adaptive P-SCAN device of the present invention comprises: a MPEG2 demoder 41, one frame buffer 42, a movement degree information process unit 43 and are play display unit 44.Generally speaking, in 41 pairs of video data streams of MPEG2 demoder (data stream) decoding, also the kinematic relation of each position of image can be noted.And when video output unit broadcasts corresponding image, do the broadcast of different modes according to the movement degree information of record.Therefore, movement degree information process unit 43 of the present invention is promptly accepted the coded message that MPEG2 demoder 41 is provided, and needed information when broadcasting the unit broadcast is provided after the treated judgement, that is the state table as Fig. 3 is provided.Because the present invention is the characteristic that each macro block (or other block unit) analyzed on the basis with the coded message, and needn't do universe computing comparison, and then save the computing cost at several pictures of front and back in the frame.
Movement degree information process unit 43 is comprised by MPEG2 demoder 41 resulting information: picture coding type (picture coding type), picture structure (picture structure), macro block (mb) type (Macro-block type), motion vector (motion vectors), DCT frequency coefficient or conversion back time domain numerical value and macroblock address (Macro-Block address).Movement degree information process unit 43 is promptly according to the characteristic of above-mentioned all each macro blocks of information analysis, and writes down the movement degree of each macro block at plane of movement (motion plane), allows the information show image of display unit according to this plane of movement.
So-called picture coding type is the definition present image I of deciphering, B or a P image, and movement degree information process unit 43 can be analyzed by different way according to different image types.And picture structure is divided into two field picture (frame picture), upper strata figure field picture (top field picture) and lower map field picture (bottomfield picture).Because the movement degree recording of information is to be unit with the macro block in the frame, therefore identical with the knot attitude structure of two field picture, but figure field picture (field picture) then needs to adjust.Macro block (mb) type then is whether be used for defining handled macro block be home block (intra block), or whether this macro block has motion compensation or coding.Motion vector then is used for defining the motion vector value among P image and the B image, and movement degree information process unit 43 can come the movement degree of analysis and judgement macro block according to different motion vector value.DCT frequency coefficient or conversion back time domain numerical value also determine the size of movement degree, and movement degree information process unit 43 can come the movement degree of analysis and judgement macro block according to different numerical value.Macroblock address then is the address of the handled macro block of record in image, and movement degree information process unit 43 these macro blocks of meeting combining image Structure Calculation are in the position of plane of movement.
Fig. 5 shows the block diagram of movement degree information process unit among the present invention.As shown in the drawing, movement degree information process unit 43 comprises: flow process control module 431, MV (motion vector) processing unit 432, DCT processing unit 433, motion decision unit 434 and movement degree record cell 435.After flow process control module 431 receives movement degree information, motion vector information is passed to MV processing unit 432, coded message is passed to DCT processing unit 433 and frame in-line coding information is passed to motion decision unit 434 according to different macro block (mb) types.The movement degree of each macro block is then judged in motion decision unit 434 according to output, DCT processing unit 433 and the frame in-line coding information of MV processing unit 432, and movement degree is recorded in movement degree record cell 435.
Flow process control module 431 decides the action of MV processing unit 432 and DCT processing unit 433 according to macro block (mb) type.If show when having motion compensation in the macro block (mb) type, then start MV processing unit 432, and motion vector information is passed to MV processing unit 432.If show when having coding in the macro block (mb) type, then start DCT processing unit 433, and coded message is passed to DCT processing unit 433.If when being shown as intra-macroblock in the macro block (mb) type, then frame in-line coding information signal is enabled (enable).
MV processing unit 432 calculates the movement degree size of this macro block according to motion vector, and exports first reference value.Owing to have more than one motion vector in a macro block, MV processing unit 432 can be chosen all motion vectors and comprehensively judges, or only chooses representational motion vector as first reference value.When comprehensively judging, can obtain the length of each motion vector earlier, weighted calculation goes out a total length as first reference value again, and outputs to motion decision unit 434.The definition of length can be the Ka Shi space length used always (| v|=(vx^2+vy^2) ^0.5), also can be reduced to component size and, for example | v|=|vx|+|vy|.During a plurality of motion vector, can only choose representational motion vector, as motion vector prediction operator (motion vector predictor); And the weighted calculation mode can with the longest be representative, also can average.
DCT processing unit 433 decides according to DCT frequency coefficient or IDCT conversion back time domain numerical value whether this macro block is second reference value of moving region.If be set at the frequency coefficient analysis, DCT processing unit 433 has all added up frequency coefficient and has been used as second reference value, and outputs to motion decision unit 434.Because the characteristic of IDCT, the tendency that the oriented low frequency of frequency coefficient is concentrated, so the step that adds up also can be reduced to calculate low frequency term and, the first three items of for example reverse scan (inverse scan) and.If be set at the time domain numerical analysis of IDCT conversion back, this element is with the output that adds up of all pixel values.This step is also replaceable to be that each pixel compares with a critical value of adjusting according to brightness respectively, and output surpasses counting as second reference value of critical value, and outputs to motion decision unit 434.
The function of motion decision unit 434 is to integrate first reference value, second reference value and frame in-line coding information signal, and output represents the numerical value of movement degree to the movement degree record cell.It is the n rank scorer of top/bottom latitude, wherein n＞=2 that an embodiment of motion decision unit 434 is one 0 to n-1.When flow process control module 431 enabled frame in-line coding information signal, representing this macro block was intra-macroblock, and this moment, the movement degree signal of motion decision unit 434 was n-1.When flow process control module 431 was forbidden (disable) with frame in-line coding information signal, representing this macro block was not intra-macroblock, and this moment, motion decision unit 434 determined foundation with first reference value and second reference value as motion.This motion decision unit 434 deciding means when frame in-line coding information signal is forbidden is as follows: set n-1 motion vector length critical value and n-1 DCT coding numerical value critical value; First reference value and length critical value are compared, produce one first fiducial value, and second reference value and DCT coding numerical value critical value are compared, produce one second fiducial value.Average or the greater of getting first fiducial value and second fiducial value is as the movement degree signal.When n is second order, then set a motion vector length critical value L and DCT coding numerical value critical value T, and if first reference value and second reference value during greater than this critical value L or T, fiducial value promptly is set at 1.Therefore, MV processing unit 432 and DCT processing unit 433 one of them fiducial value are 1 o'clock, and the decision unit 434 that moves just exports 1, representative motion this moment 1, and 0 represents static state.And whole image is divided into two kinds of zones according to following rule at this moment.
1. intra-macroblock is set at the moving region
2. motion vector length is the moving region greater than critical value L
3. the coding component size is the moving region above critical value T
4. other is a static region
Movement degree record cell 435 in the movement degree information process unit 43 is memory zones of record movement degree.This movement degree record cell 435 has the identical plane of movement of at least three block sizes, two movement degree information of placing reference picture, and all the other place the movement degree information of B image.The movement degree recording of information, the needs that can comply with different costs be designed to the framework of different resolution.Its framework has determined the size that movement degree information is taken up space in internal memory.Mainly be divided into Motion Adaptive resolution and Motion Resolution degree.
The resolution of Motion Adaptive determines the least unit of a motion or static region.Motion vector is unit with the macro block, and coding is a unit with the piece.Decide the movement degree of whole macro block with motion vector after, can determine the movement degree of each piece again with the coefficient magnitude of coding, the offset behind the use IDCT more can be promoted to pixel to resolution.And the Motion Resolution degree is moved and static two rank by the exponent number decision of motion decision unit 434 minimum being divided into, and also can be divided into multistage according to need.Fig. 3 shows that promptly Motion Adaptive resolution is unit with the macro block, and movement degree is divided into the movement degree information record of motion (M) and static (S) two kinds.
When broadcast unit 44 will be play certain image, pixel data is taken out on the one hand from frame buffer 42, read its movement degree information simultaneously corresponding to the plane of movement of movement degree record cell 435.When the position of broadcasting unit 44 broadcasts belongs to the macro block of static state, broadcast with static mode (method for example interweaves); And when broadcasting the position at the motion macro block, broadcast with mode of motion (for example figure interpolation field method).
Because the image decoding of MPEG2 order is different with the broadcast order, the appearance order of I, P, three kinds of images of B is unfixing yet.So when an image began to decipher, flow process control module 431 can carry out the judgement control of movement degree information record according to different images.Fig. 6 has promptly shown the judgement flow process of this flow process control module 43 1 according to I, P, three kinds of images of B, promptly uses the movement degree information of which kind of image according to different playing image type, background image type and reference picture type decided.
Step S602: the image type of differentiating decoding at present is P image, B image or I image, if then skip to step S604 during record P image motion degree information, if then skip to step S606 during record B image motion degree information, if then skip to step S610 when playing the I image;
Step S604: the movement degree information of the image of record own is in the plane of movement of movement degree record cell 435, also the image type of decoding is the P image even at present, then write down the movement degree information of this P image, if the image type of decoding is the B image at present, then write down the movement degree information of this B image;
Step S606: whether analysis (backward) reference picture backward is the P image, if the P image then skips to step S608, otherwise skips to step S604;
Step S608: utilize the movement degree information of this B image and P reference picture to write down this movement degree information in the plane of movement of movement degree record cell 435 simultaneously, the method for utilization is that the movement degree of co-located is average or get its large one;
Step S610: whether have with this I image B image as reference image, then skip to step S612 if having, otherwise skip to step S614 if analyzing;
Step S612: use the movement degree information of the movement degree information of B image as this I image, the movement degree information that for example can write down this B image is in the plane of movement of movement degree record cell 435, or when broadcasting the unit broadcast, direct movement degree information with reference to this B image;
Step S614: analyze backward whether reference picture is the P image and has solved movement degree information,, then skip to step S618 if not if then skip to step S616;
Step S616: use the movement degree information of the movement degree information of P reference picture backward as this I image, for example can be recorded in the plane of movement of movement degree record cell 43 5, or when broadcasting the unit and broadcasting, directly with reference to the movement degree information of this P reference picture;
Step S618: the self-adaptive processing of not taking exercises, or be considered as the moving region entirely and be recorded in the plane of movement of movement degree record cell 435.
Flow process control module 431 simultaneously according to picture structure and macroblock address (Macro-Block Address MBA) produces the plane of movement address, determines movement degree recording of information position after this macroblock analysis, and its producing method is as follows:
1. when picture structure was frame structure, the plane of movement address was a macroblock address.
2. when picture structure was the figure field structure, the movement degree information that each macro block produced can influence the data of two plane of movement addresses, was respectively
(MBA/mb_w)*2*mb_w+(MBA％mb_w)
((MBA/mb_w)*2+1)*mb_w+(MBA％mb_w)
Wherein, mb_w is the width of plane of movement, equals picture traverse divided by 16, and the % symbol is the round numbers division arithmetic.
Therefore, the present invention only need analyze the movement degree information that the coded message that is produced by the MPEG2 demoder can produce each macro block based on the Motion Adaptive P-SCAN device and method of coded message, and by broadcast unit according to this movement degree information playing video, save the computing cost.
Though be the Motion Adaptive P-SCAN device and method of the present invention based on coded message to be described with reference to embodiment, but therefore do not limit scope of the present invention, only otherwise break away from main idea of the present invention, those skilled in the art can be to its various distortion of row or change.
Claims (17)
1. Motion Adaptive P-SCAN device based on coded message comprises:
One MPEG2 demoder is used to receive the MPEG2 coded data and this coded data decoding back is produced coded message and view data;
One frame buffer is used for keeping in described view data;
One movement degree information process unit is used to receive described coded message, and produces the movement degree information of each piece in each image according to this coded message; And
One broadcast unit is used for playing in the different switching mode according to the movement degree information of described each piece the described view data of described frame buffer.
2. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 1, the unit of each piece is the defined macro block of MPEG2 demoder in the wherein said image.
3. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 1, wherein said movement degree information process unit comprises:
The flow process control module is used to receive described coded message, and controls the action of this movement degree information process unit according to the picture coding type in the coded message, picture structure, macro block (mb) type, motion vector, DCT frequency coefficient and macroblock address;
The motion vector processing unit is used to receive described motion vector, and with the length of this motion vector as one first reference value;
The DCT processing unit is used to receive described DCT frequency coefficient, and produces one second reference value with the DCT frequency coefficient;
Motion decision unit is used for producing movement degree information according to described first reference value, second reference value and described macro block (mb) type; And
The movement degree information recording unit is used for writing down described movement degree information according to described macroblock address.
4. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 3, wherein said motion decision unit are to be the n rank scorer of top/bottom latitude with 0 to n-1.
5. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 4, wherein said motion decision unit has n-1 length critical value and n-1 DCT critical value.
6. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 5, wherein said flow process control module shows when having motion compensation if detect in the described macro block (mb) type, then start described motion vector processing unit, and motion vector information is passed to the motion vector processing unit.
7. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 6, wherein said flow process control module is if detect when having coding in the described macro block (mb) type, then start described DCT processing unit, and coded message is passed to the DCT processing unit.
8. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 7, wherein said flow process control module then enables a frame in-line coding information signal if detect when being shown as intra-macroblock in the described macro block (mb) type.
9. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 8, wherein when described frame in-line coding information signal was enabled, the movement degree information of described motion decision unit output was n-1.
10. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 9, wherein when described frame in-line coding information signal is under an embargo, with described first reference value and second reference value as standards of grading, and selecting one of them described length critical value of approaching described first reference value is first fiducial value, and selection is second fiducial value near one of them described DCT critical value of described second reference value.
11. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 10, the mean value of first fiducial value and second fiducial value is exported as described movement degree information in wherein said motion decision unit.
12. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 10, wherein said motion decision unit are exported higher value in first fiducial value and second fiducial value as described movement degree information.
13. as claim 11 or 12 described Motion Adaptive P-SCAN devices based on coded message, wherein said n is 2.
14. the Motion Adaptive P-SCAN device based on coded message as claimed in claim 13, wherein when movement degree information was 1, this macro block was motion, and play with the frame interpolation method, and when movement degree information was 0, this macro block was static, and play with the method that interweaves.
15. the Motion Adaptive P-SCAN method based on coded message comprises the following step:
The decoding step is used to utilize the MPEG2 demoder to receive the MPEG2 coded data, and this coded data decoding back is produced coded message and view data, and view data is stored in frame buffer;
Movement degree information produces step, is used to receive described coded message, and produces the movement degree information of each piece in each image according to this coded message; And
Play step, be used for playing in the different switching mode the described view data of described frame buffer according to the movement degree information of described each piece.
16. the Motion Adaptive P-SCAN method based on coded message as claimed in claim 15, wherein said movement degree information produce step and comprise the following step:
If the image type in the described coded message is the P image, then produce the movement degree information of this P image according to described coded message, and with the movement degree information of this P image as the movement degree information of playing;
If the image type in the described coded message be the B image and backward reference picture be not the P image, then produce the movement degree information of this B image according to described coded message, and with the movement degree information of this B image as the movement degree information of playing;
If the image type in the described coded message be the B image and backward reference picture be the P image, then produce the movement degree information of this B image, and with the movement degree information that merges this B image and P image movement degree information as broadcast according to described coded message;
If the image type in the described coded message is the I image, and have with this I image as the B image of reference image and solved movement degree information, then with the movement degree information of this B image movement degree information as broadcast;
If the image type in the described coded message is the I image, and reference picture is the P image and has solved movement degree information backward, then with the movement degree information of this P image movement degree information as broadcast;
If the image type in the described coded message is the I image, and does not have described various situation, the self-adaptive processing of then not taking exercises, or be considered as the moving region broadcast entirely.
17. the Motion Adaptive P-SCAN method based on coded message as claimed in claim 16, the movement degree information of wherein said this image of generation comprises the following step:
When if the macro block (mb) type in the described coded message is intra-macroblock, then the movement degree information of this macro block is motion;
When if the macro block (mb) type in the described coded message is the motion vector compensation piece, then calculate the length of the motion vector of this macro block, when the length of this motion vector greater than a length critical value, then the movement degree information of this macro block is motion, otherwise be static state;
When if the macro block (mb) type in the described coded message is the DCT encoding block, then calculate the amount of the DCT coding of this macro block, when the amount of this DCT coding greater than a DCT critical value, then the movement degree information of this macro block is motion, otherwise be static state; And
When if the macro block (mb) type in the described coded message is motion vector compensation and DCT encoding block, then calculate the length of motion vector of this macro block and the amount of DCT coding, when the length of this motion vector greater than the amount of a length critical value or this DCT coding greater than a DCT critical value, then the movement degree information of this macro block is motion, otherwise is static.
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| CN101568030A (en) * | 2009-06-05 | 2009-10-28 | 湖南工程学院 | Method and system for decoding self-adaptive multi-standard reconfigurable video |
| WO2011065859A1 (en) * | 2009-11-24 | 2011-06-03 | Intel Corporation | Displaying decompressed pictures on liquid crystal dispays in macroblock raster scan order |
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| JPH03204289A (en) * | 1989-12-29 | 1991-09-05 | Sony Corp | Receiver |
| US5386248A (en) * | 1990-08-28 | 1995-01-31 | U.S. Philips Corporation | Method and apparatus for reducing motion estimator hardware and data transmission capacity requirements in video systems |
| JPH09172621A (en) * | 1995-12-20 | 1997-06-30 | Sony Corp | Interpolation device and interpolation method for compressed high resolution video signal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03204289A (en) * | 1989-12-29 | 1991-09-05 | Sony Corp | Receiver |
| US5386248A (en) * | 1990-08-28 | 1995-01-31 | U.S. Philips Corporation | Method and apparatus for reducing motion estimator hardware and data transmission capacity requirements in video systems |
| JPH09172621A (en) * | 1995-12-20 | 1997-06-30 | Sony Corp | Interpolation device and interpolation method for compressed high resolution video signal |
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