CN1096792C - Double picture producing apparatus for wide screen television - Google Patents
Double picture producing apparatus for wide screen television Download PDFInfo
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- CN1096792C CN1096792C CN96101375A CN96101375A CN1096792C CN 1096792 C CN1096792 C CN 1096792C CN 96101375 A CN96101375 A CN 96101375A CN 96101375 A CN96101375 A CN 96101375A CN 1096792 C CN1096792 C CN 1096792C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
- H04N7/012—Conversion between an interlaced and a progressive signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
Abstract
The present invention relates to a double image generating device used for a wide screen television, and comprises a clock generator used for receiving a horizontal synchronizing signal and outputting a writing clock signal, a reading clock signal and a pattern selection signal; a withdrawal device used for outputting a writing address and a reading address; a double image video signal generator used for receiving a first video signal and a second video signal which the picture length and breadth ratio is transformed, and used for outputting a double image video signal; a video signal selector used for receiving the first video signal, the second video signal and the double image video signal, and used for outputting the signal to a chromoscope according to the pattern selection signal.
Description
The digraph that the present invention relates to be used for wide screen television resembles generation device, and is particularly related to the improved digraph that is used for wide screen television that image zoom (zooming up) function that can use the aspect ratio of the picture conversion realizes that simultaneously aspect ratio of the picture conversion and digraph resemble demonstration and resembles generation device.
Know as those skilled in the art, digraph as shown in Figure 1 resembles TV and is included in the formed alphabetical frame in screen top and screen lower part, can show the image of 16: 9 aspect ratio of the picture and do not have anamorphose on the TV of 4: 3 aspect ratio of the picture with this.
And, according to the application of the increase of wide screen television, provide the composite program of 4: 3 aspect ratio of the picture and 16: 9 aspect ratio of the picture, so the screen television of the screen television of 4: 3 aspect ratio of the picture and 16: 9 aspect ratio of the picture can use simultaneously by the broadcasting station.TV programme spectators with screen television of the screen television of 4: 3 aspect ratio of the picture or 16: 9 aspect ratio of the picture can appreciate the program of 4: 3 aspect ratio of the picture on the screen television of 16: 9 aspect ratio of the picture.
Fig. 2 illustrates the digraph that is used for common wide screen television and resembles generation device, this device comprises that is used to receive a left panel vision signal, generation level and vertical synchronizing signal H and V and clock signal, and isolate the left panel video signal preprocessor 10 of luminance signal and carrier chrominance signal from left panel vision signal, one be used for according to horizontal-drive signal H read/write from left panel video signal preprocessor 10 exported red, green, and the left panel carrier chrominance signal selector 20 of blue (RGB) signal, one is used to receive right panel vision signal, generation level and vertical synchronizing signal H and V and clock signal, and isolate luminance signal and carrier chrominance signal from right panel vision signal, this signal of demodulation is also exported R, G, right panel video signal preprocessor 30 with the B signal, one be used for according to horizontal-drive signal H read/write from right panel video signal preprocessor 10 exported red, green, and the right panel carrier chrominance signal selector 40 of blue (RGB) signal, level that basis is exported from left panel image signal processor 10 and vertical signal H and V are used for to chromoscope (CPT) output control signal so that the deflector 50 of the size of expansion image left and to the right, be used to receive horizontal-drive signal H and the clock signal of being exported from left panel image signal processor 10 and be used to export one and select signal MSS so that produce the selection signal generator 60 of an a pair of image and a free hand drawing elephant according to mode select signal MSS, first multiplexer 70 that is used to receive left side image signal processor 10 and right side image signal processor 30 and is used to produce left side image and digraph elephant according to the selection signal of selecting signal generator 60 according to the selection signal of selecting signal generator 60, one be used to count the horizontal-drive signal of being exported from left side image signal processor 10 and be used for the out alphabet signal and the screen of letter output control signal on generator 80, one is used to receive first multiplexer 70 and screen and goes up the output of generator 80 and be used for being used for being output as an analog signal and being used for D/A converter 100 to chromoscope output according to selection conversion of signals second multiplexer 90 of selecting signal generator 60 according to second multiplexer 90 of the certain signal of letter output control signal output and one.
Left side image signal processor 10 comprises an amplifier 11 that is used to amplify the left hand view picture signals, a sync separator 12 that is used for isolating horizontal-drive signal H and vertical synchronizing signal V from the left hand view picture signals that has amplified, a clock generator 13 that is used for according to the synchronization output signal clocking of sync separator 12, one is used for according to clock signal conversion left hand view picture signals is the A/D converter 14 of digital image signal, a bandpass-amplifier circuit 15 that is used for the left hand view picture signals that amplified through digital translation by passband, the synchronous chrominance synchronization device 16 of carrier chrominance signal that is used for making the left hand view picture signals that amplified from passband, the output of output that is used for demodulation bandpass-amplifier circuit 15 and chrominance synchronization device 16 also is used to export the demodulator 17 of colour difference signal R-Y and B-Y, an and brightness signal Y that is used to receive colour difference signal R-Y and B-Y and is exported by A/D converter 14 and be used to export R, the array device 18 of G and B signal.
The visual carrier chrominance signal selector 20 in left side comprises that a cycle according to horizontal-drive signal H is alternately switched and is used to export the R that is exported from array device 18, G, switch 21 with the B signal, be used for the R that read/write is exported from switch 21, the line storage 22 and 23 of G and B signal, and one be used for alternately being switched according to the cycle of anti-phase horizontal-drive signal H and be used to export from line storage 22 and 23 R that exported, the second switch 24 of G and B signal.
In addition, right side image signal processor 30 and right side carrier chrominance signal selector 40 are similar with left side image signal processor 10 and left side carrier chrominance signal selector 20.
Select signal generator 60 to comprise that one is used for 2 times of multiplexers 61 of the frequency multiplication of the horizontal-drive signal H that is exported from sync separator 12, a D flip-flop 62 that is used for exporting for a horizontal scanning period clock signal with a high potential state and a low-potential state according to the output of 2 times of multiplexers 61,2 times of multiplexers 63 that are used for making the frequency multiplied clock signal exported from clock generator 13, and the switch 64 and 65 that carries out switch according to the mode select signal MSS that sets by the user.
Now resemble the operation of generation device for the digraph of common wide screen television referring to description of drawings.
Beginning, when the digraph that is input to wide screen television when left hand view picture signals and right part of flg picture signals from broadcasting station output resembled generation device, left hand view picture signals and right part of flg picture signals were handled by left side image signal processor 10 and right side image signal processor 20 respectively.For this reason, will the processing of left hand view picture signals only be described.
The left hand view picture signals is amplified by amplifier 11, carries out digital translation by A/D converter 14, and is amplified by passband and be imported into demodulator 17 by bandpass-amplifier circuit 15.After this, chrominance synchronization device 16 makes by the carrier chrominance signal of the left hand view picture signals of 15 passbands of bandpass-amplifier circuit synchronously and output to demodulator 17.
After this, the output of 17 pairs of bandpass-amplifier circuits 15 of demodulator and the output demodulation of chrominance synchronization device 16 are also exported colour difference signal R-Y and B-Y, and the brightness signal Y that array device 18 reception colour difference signal R-Y and B-Y and A/D converter 14 are exported is also exported R, G and B signal are to left side image carrier chrominance signal selector 20.
In addition, the output of sync separator 12 reception amplifiers 11 is also isolated horizontal-drive signal H and vertical synchronizing signal V from it, and clock generator 13 is according to the synchronizing signal separation clock signal of sync separator 12.
After this, the switch 21 of left side carrier chrominance signal selector 20 is transferred when the one-period of horizontal-drive signal H, and the R that exported by array device 18 of output, G and B signal, line storage 22 and 23 receives R from first switch 21, G and B signal, and repeat the write and read operation.
In addition, second switch 21 is transferred when the one-period of anti-phase horizontal-drive signal H, and the R that reads from line storage 22 and 23 of output, and G and B signal are to first multiplexer 70.
As the R from array device 18 outputs, when G and B signal were input to line storage 22 by switch 21, line storage 22 became the state of writing, and line storage 23 becomes read states.As the R that reads from line storage 23, when G and B signal output to first multiplexer 70 by switch 24, and as R, when G and B signal are input to line storage 23 by switch 21 from array device 18 outputs, line storage 23 becomes the state of writing, and line storage 22 becomes read states.From the R that line storage 22 is read, G and B signal output to first multiplexer 70 by switch 24.
In addition, right side image signal processor 30 receive the right part of flg picture signals and to the right carrier chrominance signal selector 40 by the process identical with left side image signal processor 10 to output R, G, with the B signal, and the visual carrier chrominance signal selector 20 identical modes in operation left side of right side image carrier chrominance signal selector 40 are operated.
That is, as the R from array device 38 outputs, when G and B signal were input to line storage 42 by switch 41, line storage 42 became the state of writing, and line storage 43 becomes read states.As the R from array device 38 outputs, when G and B signal were input to line storage 43 by switch 41, line storage 43 became the state of writing, and line storage 42 becomes read states.R, G and B signal are read out and write by the switch 41 and 42 of being transferred according to horizontal-drive signal H and anti-phase horizontal-drive signal H.
Simultaneously, the frequency multiplication of the horizontal-drive signal H that selects 2 times of multiplexers 61 of signal generator 60 to make to be exported from synchronizer 12, and D flip-flop 62 receives the horizontal-drive signal of its frequency multiplications and has a clock signal of a high level state and a low level state to switch 64 outputs for cycle of a horizontal-drive signal, and 2 times of multiplexers 63 make from the frequency multiplied clock signal of clock generator 13 outputs and output to switch 65.
At this moment, when the input digraph resembles selection signal MSS, import by switch 64 as the selection signal of first multiplexer 70 from the clock signal that D flip-flop 62 is exported, and be imported into D/A converter 100 from the clock signal of 2 times of multiplexers, 63 outputs.
So, for the R that is exported from left side image carrier chrominance signal selector 20 according to the first half period clock signal, first multiplexer, 70 outputs that are input to a clock signal wherein by switch 64, G, with the B signal, and for the half period output R that visual carrier chrominance signal selector 40 is exported from the right side under it, G, with the B signal, thereby for the doubled R of digraph elephant of a horizontal scanning period, G and B signal also output to second multiplexer 90.
In addition, the counter 81 of generator 80 counting is input to wherein horizontal-drive signal H by sync separator 12 on the screen, letter generator 82 is exported an alphabetic signal according to a count value to second multiplexer 90, comparator 83 receives the count value exported from counter 81 and relatively this count value is with the previous reference value of setting, and D flip-flop 84 is according to selecting signal to a comparison signal of its input to 90 outputs one of second multiplexer from comparator 83.
At this moment, when certain letter will be displayed on the screen, second multiplexer 90 received an alphabetic signal from alphabetical generator 82 and also exports to D/A converter 100 according to the selection signal of being exported from D flip-flop 84.When not having letter, the R of the digraph elephant that the output of second multiplexer 90 is exported from the D flip-flop 84 that shields generator 60, G, with the B signal to D/A converter 100, and an alphabetic signal of a pair of image that D/A converter 100 is exported from first multiplexer 70 according to 2 times of rate conversion of a clock signal of being exported from switch 65 and R, G and B signal are analog signal and output to CPT.
In addition, when the deflecting coil that is input to CPT from the vertical deflector 51 and the horizontal deflection device 52 of deflector 50 when vertical deflection signal and horizontal deflection signal is used for level and extends perpendicular dimension of picture, focusing coil receives the deflection angle control signal that puts on it from focalizer 53, and resemble R corresponding to the digraph that puts on it from D/A converter 100, G, focus on a fixed point with the electron beam Be Controlled of B signal, and high-pressure generator 54 is to the high pressure of the about 10kV of the two poles of the earth of CPT output.
So, CPT is according to vertical deflection signal and the horizontal deflection signal exported from vertical deflector 51 and horizontal deflection device 52, and the deflection angle signal of being exported from focalizer 53 is handled alphabetic signal and the digraph exported from D/A converter 100 respectively and is resembled R, G, with the B signal, make on screen to resemble to demonstrate left hand view picture signals and right part of flg picture signals as digraph.
Simultaneously, when importing certain selection signal MSS, according to selecting signal MSS one ground signalling to select signal to be input to first multiplexer 70 by switch 64 as one, the clock signal of being exported from clock generator 13 is input to D/A converter 100 by switch 65.
After this, first multiplexer 70 is the R that is exported by left side image carrier chrominance signal selector 20, G and B signal output to second multiplexer 90 according to an earthed voltage, and second multiplexer 90 receives an alphabetic signal and a selection signal from shielding generator 80.When certain alphabetic signal existed, second multiplexer 90 was according to selecting signal for R, and G and B signal and alphabetic signal carry out multiplexed and output to D/A converter 100.
Thereby, D/A converter 100 is according to the multiplexed R of clock signal conversion that is input to it from switch 65, G and B signal are an analog signal and output to CPT, and CPT shows left side image and right side image according to the control signal of being exported from deflector 50 at screen.
Yet, resemble generation device for common wide screen television digraph and make each visual size expand with vertical direction in the horizontal direction, and can not carry out the function of aspect ratio of the picture conversion owing to can not use deflecting coil.In addition, the structure of this system is complicated.
So, an object of the present invention is to provide a kind of digraph that is used for wide screen television and resemble generation device, this device has overcome the problem that resembles in the generation device to be run into for common wide screen television digraph.
Another object of the present invention provides the improved digraph that is used for wide screen television that a kind of image zoom function that can use aspect ratio of the picture conversion realizes that simultaneously aspect ratio of the picture conversion and digraph resemble demonstration and resembles generation device.
In order to achieve the above object, provide a kind of digraph that is used for wide screen television to resemble generation device, this device comprises: one first zoom controller is used for the first vision signal row and postpones, and is used for increasing the number of scanning lines by a kind of operation, and is used to carry out the function of aspect ratio of the picture conversion; One second zoom controller is used for the second vision signal row and postpones, and is used for increasing the number of scanning lines by a kind of operation, and is used to carry out the function of aspect ratio of the picture conversion; A sync separator is used to receive first vision signal, and is used for isolating horizontal-drive signal and vertical synchronizing signal from this first vision signal; One first field memory is used to receive second zoom controller to have an output of the aspect ratio of the picture that is converted and is used to make that this output and horizontal-drive signal and vertical synchronizing signal are synchronous; One clock generator is used to receive horizontal-drive signal and is used to export a write clock signal, a read clock signal and a mode select signal; Withdrawal device is used to count the write clock signal of exporting from clock generator and is used for according to the mode select signal write address output and reads the address; Digraph resembles video signal generator and is used to receive and has been changed first vision signal and second vision signal of aspect ratio of the picture by first and second zoom controllers and be used for exporting a pair of image video signal by dividing half-and-half except that the number of scanning lines of vision signal; Video signal selector is used to receive by first and second vision signals of first and second aspect ratio of the picture that zoom controller is changed and from the digraph that this digraph resembles video signal generator output and resembles vision signal, and is used for exporting this signal according to mode select signal to chromoscope.
Fig. 1 is the schematic front view that the digraph of common TV resembles screen.
Fig. 2 is used for the block diagram that common wide screen television digraph resembles generation device.
Fig. 3 is the block diagram that the digraph that is used for wide screen television according to the present invention resembles first embodiment of generation device.
Fig. 4 A and 4B are the views according to the scan line of Fig. 3 of the present invention.
Fig. 5 A is the simple front view that the digraph that is used for wide screen television according to the present invention resembles the configuration of generation device to 5D.
Fig. 6 is the block diagram that the digraph that is used for wide screen television according to the present invention resembles second embodiment of the withdrawal device of generation device and digraph picture signals generator.
Fig. 3 represents that the digraph that is used for wide screen television according to first embodiment of the invention resembles generation device, this device comprises: one first zoom controller 100 is used for postponing to carry out the function of aspect ratio of the picture conversion by increasing the number of scanning lines according to the first vision signal row, one second zoom controller 200 is used for postponing to carry out the function of aspect ratio of the picture conversion by increasing the number of scanning lines according to the second vision signal row, a sync separator 300 is used for isolating horizontal-drive signal H and vertical synchronizing signal V from first vision signal, a field memory 400 is used to receive the output of second zoom controller 200 and is used to make that this output and horizontal-drive signal H and vertical synchronizing signal V are synchronous, one clock generator 500 is used to receive horizontal-drive signal H and is used to produce a write clock signal WTC, one read clock signal RDC, with a mode select signal MSS, withdrawal device 600 is used to count the write clock signal WTC that is exported from clock generator 500 and is used for exporting a write address and according to mode select signal MSS reads the address, digraph resembles video signal generator 700 and is used to receive and has been changed first vision signal and second vision signal of aspect ratio of the picture by first and second zoom controllers 100 and 200 and be used for exporting a pair of image video signal by dividing half-and-half except that the number of scanning lines of vision signal, video signal selector 800 is used to receive by first and second vision signals of first and second zoom controllers 100 and 200 aspect ratio of the picture of changing and from the digraph that digraph resembles video signal generator 700 and resembles vision signal, and is used for exporting to the chromoscope (not shown) according to mode select signal MSS.
In addition, the structure of second zoom controller 200 is identical with first zoom controller 100.
Digraph resembles video signal generator 700 and comprises: line storage 701 and 702 is used for writing from first and second zoom controllers 100 and 200 outputs as 910f according to the read/write mode signal of being exported from toggle flip-flop 503
HWrite clock signal first and second vision signals and be used to read as 1820f
HOdd-numbered line first and second vision signals of read clock signal WTC, a divider 703 is used to receive the 1820f from 2 times of multiplexers 502
HLeading (leading) clock signal WTC and with it divided by 910f
HToggle flip-flop 704 is used for exporting a high level clock signal and a low level clock signal according to the output of divider 703 for a horizontal scanning period, the clock signal that basis is exported from the toggle flip-flop 704 and switch 705 of alternately being transferred is used to export first and second vision signals of being read from line storage 701 and 702, a scan line counter 706 is used for count level synchronizing signal H and is used for out alphabet frame control signal, and frame memory 707 is used for resembling a vision signal of vision signal output as digraph and being used for one reading the address and reading the digraph of being stored and resemble vision signal according to the alphabetical frame control signal of being exported from scan line counter 706 with from what 2 times of multiplexers 602 were exported from switch 705 according to the write address storage of address counter 601.
Refer now to the operation that description of drawings is used for wide screen television according to the present invention digraph resembles generation device.
Beginning, first vision signal that is input to first zoom controller 100 is converted to a digital signal by A/D converter 101 and is stored in the field memory 102, and field memory 102 output and synchronized stored first vision signals of horizontal-drive signal H, and line storage 103 and 104 is by showing sequentially that line by line first vision signal of being exported from field memory 102 exports this signal.
After this, first operator 105 receives by line storage 103 and postpones first vision signal of delegation and change capable position by numerical value being multiply by coefficient value 1-K, and 106 receptions of second operator be multiply by coefficient value K and changed capable position by first vision signal of line storage 104 delay delegation and with numerical value.Wherein coefficient value K is 1,1/4,1/2,3/4 range.
Thereby, addition according to the output of first operator 105 and second operator 106, adder 107 generates from one of upper and lower horizontal scan line new scan line, and insert this new scan line between the first and the 3rd scan line of original horizontal scan line, increased the horizontal sweep line number with this, so carried out the mapping function of aspect ratio of the picture.
That is, when first vision signal that postpones when the delegation that exported by line storage 103 shown in Fig. 4 A has scan line 26 to 29, because K is 1,1/4,1/2,3/4,, the coefficient value 1-K of first operator 105 has numerical value 0,3/4,1/2,1/4 ... the coefficient value K of second operator 106 has numerical value 1,1/4,1/2,3/4 ...
The result, as coefficient value 1-K and scan line 26-28 during by first and second operators 105 and 106 products and by adder 107 summations, generate new scan line 26a by the upper and lower scan line shown in Fig. 4 B, 26b and 26c, and new scan line 26a, 26b and 26c are inserted between first scan line 26 and the 3rd scan line 28.
Thereby, inserted delegation's scan line at per the 3rd scan line of being exported from line storage 103, and because four scan lines of adder 107 outputs, the sum of scan line is 525 * (4/3).Line storage 103 outputs the 3rd scan line, and the 4th scan line is deferred to four scan lines all from adder 107 outputs, and line storage 103 delay control four scan lines among whole scan lines reach delegation.
And second zoom controller 200 is carried out and first zoom controller, 100 identical operations, carries out the aspect ratio of the picture conversion for second vision signal, and stores it to field memory 400.According to the level of being exported from sync separator 300 and vertical synchronizing signal H and V, field memory 400 is by making second vision signal and first vision signal export this second vision signal synchronously to video signal selector 900.
Thereby video signal selector 900 receives the mode select signal MSS of single-images and selects to be exported from first zoom controller 100 or second zoom controller 200 when the user wants to watch broadcast program with single-image a vision signal, then first vision signal or second vision signal that have been transformed of aspect ratio of the picture is presented on the screen of chromoscope.
After this, when making that the user watches the digraph of digraph elephant to resemble mode select signal MSS from video signal selector 900 outputs, then the clock generator 501 of clock generating unit 500 is exported a 910f according to the horizontal-drive signal H that is exported from sync separator 300
HWrite clock signal WTC, and 2 times of multiplexers 502 are by multiplication 910f
HWrite clock signal WTC export a 1820f
HRead clock signal, and a toggle flip-flop 503 is exported a read/write mode signal according to a horizontal-drive signal H who is exported from sync separator 300.
At this moment, when WriteMode signal during from toggle flip-flop 503 output, according to a 910f who exports from clock generator
HWrite clock signal WTC line storage 701 and 702 first row of first and second vision signals of being exported from first zoom controller 100 and field memory 400 is write.
After this, when reading mode signal during from toggle flip-flop 503 output, line storage 701 and 702 is ignored the vision signal of second row and according to the 1820f that is exported from 2 times of multiplexers 502
HRead clock signal WTC reads first row of first and second vision signals with the speed that doubles WriteMode.
When WriteMode signal during from toggle flip-flop 503 input, the third line of first and second vision signals is written into, and when the reading mode signal is imported, a vision signal of the third line that is written into is repeated to read, thereby line storage 701 and 702 only writes the odd-numbered line of first and second vision signals.
Thereby, since line storage 701 and 702 only write and read from vision signal by the odd-numbered line with 525 * (4/3) scan lines shown in Fig. 5 A and 5C of zoom, so the capable sum of first and second vision signals of exporting from line storage 701 and 702 is the number of scanning lines 525 * (4/3) that is expanded half.That is, this number of scanning lines is 525 * (2/3).As a result, the number of scanning lines is converted with 2: 1 ratio.
At this moment, divider 703 is with 910f
HDivide and remove the 1820f that is exported from 2 times of multiplexers 502
HRead clock signal WTC, and toggle flip-flop 704 is exported for a horizontal scanning period according to one of divider 803 has a high level and a low level clock signal, and switch 705 exports one from line storage 701 and 702 vision signals exported at a horizontal scanning period to frame memory 806 according to a clock signal of being exported from toggle flip-flop 804.
In addition, address counter 601 countings of withdrawal device 600 are from the 910f that clock generator 501 is exported that writes of clock generator 500
HWrite clock signal WTC and export a write address, and 2 times of multiplexers 602 receive also multiplication from the write address of address counter 601, and switch 603 receives that a write address and of being exported from address counter 601 and 2 times of address generators 602 is read the address and according to the read/write mode signal of being exported from the toggle flip-flop 503 of clock generator 500 selectively to frame memory 806 outputs.
Thereby, frame memory 707 write address that basis is exported from address counter 601 under WriteMode writes by switch 805 and resembles vision signal to the digraph of its input, and under WriteMode, produce alphabetical frame in the upper and lower part of screens, and one read the address and read even number and the odd number pixel that the digraph of being stored resembles vision signal according to what export from 2 times of multiplexers 602 with 1.5 row according to the alphabetical frame control signal of being exported from scan counter 700.
At this moment, because frame memory 806 only reads even number and odd number pixel from resemble vision signal from the digraph of being stored, so because each is its number half, so the number of pixels of the horizontal scan line of first vision signal and second vision signal is 455., shown in Fig. 5 B, when an image became with the digraph pictograph, first picture intelligence and second picture intelligence were combined, and formed a common 915f
HHorizontal scan line.
Then, a digraph of being exported from frame memory 707 resembles the switch 801 of vision signal by video signal selector 800 and is output and is converted to an analog signal and outputs to chromoscope by D/A converter 802, so demonstrate a pair of image on the screen of chromoscope.
In addition, Fig. 6 illustrates a withdrawal device and a pair of picture intelligence generator that a digraph that is used for wide screen television according to a second embodiment of the present invention resembles generation device, this device comprises a withdrawal device 900, and this withdrawal device has: an address counter 901 is used to count the 910f that is exported from the clock generating device 501 of clock generator 500
HWrite clock signal WTC and be used to export a write address, 2 times of multiplexer 902 be used to double this write address and be used to export a 1820f
HRead the address, and multiplexer 903 and 904 is used to receive from the write address of address counter 901 and 2 times of multiplexers 902 and reads the address and be used for exporting this address according to a read/write signal.
Digraph picture signals generator 910 comprises: a toggle flip-flop 911 is used to receive horizontal-drive signal H and is used to export one selects signal, a toggle flip-flop 912 is used for selecting signal to export a read/write signal according to one of toggle flip-flop 911, switch 913 of selecting signal to replace switching according to toggle flip-flop 911 is used for capable first and second vision signals of inserting therebetween of output scanning, line storage 914 be used for line storage 914 be in according to by inverter INI under the state set of anti-phase read/write signal according to a read/write address of exporting from multiplexer 903 and read/write first and second vision signals, line storage 915 be used for line storage 915 be in according under the state of setting by a read/write signal of toggle flip-flop 912 according to a read/write address of exporting from multiplexer 904 and read/write first and second vision signals, 2 times of multiplexers 916 this horizontal-drive signal H that is used to double, a toggle flip-flop 917 is used to receive the output of 2 times of multiplexers 916 and is used for having a high level and a low level clock signal for a horizontal scanning period output, multiplexer 918 usefulness are selectively exported from first and second vision signals of line storage 914 and 915 outputs for a horizontal scanning period according to a clock signal of being exported from toggle flip-flop 917, a counter 919 is used for count level synchronizing signal H and is used to export an alphabetical frame control signal, and a frame memory 920 is used for according to write address of being exported from address counter 901 and the vision signal of exporting a pair of image from the alphabetical frame control signal that scan line counter 706 is exported.
Now resemble the operation of generation device referring to the description of drawings digraph that is used for wide screen television according to a second embodiment of the present invention.
Beginning, when first vision signal of having inserted the one scan row betwixt and second vision signal are input to video signal generator 910, switch 913 is alternately transferred according to a selection signal of being exported from toggle flip-flop 911, and is added to line storage 914 and 915 respectively in odd and even number first vision signal and second vision signal of each horizontal scanning period.
Under this situation, when first vision signal is added to line storage 914, and when line storage 914 is in when writing state according to the read/write signal of being exported from toggle flip-flop 912, line storage 915 becomes read states, and first row of first vision signal is according to the write address storage of being exported from multiplexer 903.
At this moment, multiplexer 904 is exported a write address according to a read/write signal of being exported from toggle flip-flop 912, and the address is read in multiplexer 905 outputs one.
Then, when second vision signal is added to line storage 915, and when line storage 914 becomes read states according to the read/write signal of being exported from toggle flip-flop 912, line storage 915 becomes the state of writing, and first row of first vision signal of writing line memory 914 is according to a 1820f who is exported from multiplexer 903
HThe address of reading be read out with 2 times of speed, and line storage 915 is according to a 910f who is exported from multiplexer 903
HWrite address write second vision signal second the row.At this moment, line storage 914 and 915 is according to a 910f
HWrite address carry out read and write.
The odd-numbered line 1,3,5 of first vision signal ... (n+1) read/write from line storage 914 to line storage 914, and even number line 2,4,6 ... (n+2) read/write from line storage 915 to line storage 915.
Thereby, shown in Fig. 5 A and 5C, line storage 914 and 915 odd and even numbers of writing scan line 525 * (4/3) that has vision signal in first and second vision signals are capable, and total number of scanning lines of first and second vision signals becomes half of the number of scanning lines 525 * (4/3) of the vision signal that is expanded, and the number of scanning lines becomes 525 * (2/3), so the number of scanning lines can be converted by its half.
In addition, since wherein second vision signal that is written into of first vision signal that is written into of odd-numbered line and even number line according to the 1820f of multiplication
HRead read-only odd number in address or even number pixel, so the number of pixels of the horizontal scan line of first vision signal and second vision signal becomes 455.
Then, multiplexer receives one for a horizontal scanning period from toggle flip-flop 917 and has a high level and a low level clock signal, and for the odd-numbered line 1 of a horizontal scanning period selection from first vision signal of line storage 914 outputs, 3,5 ... (n+1) and even number line 2,4,6 ... (n+2) and to frame memory 920 export.
Thereby frame memory 920 is according to a 910f who is exported from address counter 901
HWrite address write first and second vision signals exported from multiplexer 918 producing a pair of image, and each first vision signal and second vision signal with 455 pixels of horizontal scan line is combined shown in Fig. 5 D, and produces a 910f
HHorizontal scan line.
At this moment, first vision signal is meant odd-numbered line 1,3,5 ... (n+1) and second vision signal be meant even number line 2,4,6 ... (n+2).Here odd and even number is capable inserts by a horizontal line intersected with each otherly.
As mentioned above, the digraph that is used for wide screen television according to the present invention resembles the image zoom function that generation device is intended to use the aspect ratio of the picture conversion and realizes that simultaneously aspect ratio of the picture conversion and digraph resemble demonstration, can reduce thereby the structure of system is able to the manufacturing cost of simplified system.
Though revealed preferred embodiment of the present invention to be exemplified as purpose, those skilled in the art understands that the various modifications and the additions and deletions that do not deviate from the spirit and scope of the present invention described in the appended claim all belong to possibility.
Claims (9)
1. the digraph that is used for wide screen television resembles generation device, comprising:
One first zoom controller is used for the first vision signal row and postpones, and is used for increasing the number of scanning lines by a kind of operation, and is used to carry out the function of aspect ratio of the picture conversion;
One second zoom controller is used for the second vision signal row and postpones, and is used for increasing the number of scanning lines by a kind of operation, and is used to carry out the function of aspect ratio of the picture conversion;
A sync separator is used to receive first vision signal, and is used for isolating horizontal-drive signal and vertical synchronizing signal from this first vision signal;
One first field memory is used to receive second zoom controller to have an output of the aspect ratio of the picture that is converted and is used to make that this output and horizontal-drive signal and vertical synchronizing signal are synchronous;
One clock generator is used to receive horizontal-drive signal and is used to export a write clock signal, a read clock signal and a mode select signal;
Withdrawal device is used to count the write clock signal of exporting from this clock generator and is used for exporting a write address and according to a mode select signal reads the address;
Digraph resembles video signal generator and is used to receive and has been changed first vision signal and second vision signal of aspect ratio of the picture by first and second zoom controllers and be used for exporting a pair of image video signal by dividing half-and-half except that the number of scanning lines of vision signal; And
Video signal selector is used to receive by first and second vision signals of first and second aspect ratio of the picture that zoom controller is changed and from the digraph that this digraph resembles video signal generator output and resembles vision signal, and is used for exporting this signal according to a mode select signal to a chromoscope.
2. according to the device of claim 1, wherein said first and second zoom controllers comprise:
It is digital signal that an A/D converter is used to change first and second vision signals;
One second field memory is used to make the output and a horizontal-drive signal synchronization of this A/D converter;
One first line storage is used for postponing with delegation the output of this second field memory;
One second line storage is used for first vision signal that postponed to have been postponed by delegation with delegation;
First operator and second operator are used to operate the output of this first and second line storage and are used for line number value of conversion; And
An adder is used for suing for peace for the line number value of this first and second operator, and is used to insert a new scan line, and is used to export first and second vision signals of having changed aspect ratio of the picture.
3. according to the device of claim 2, the wherein said first and second zoom controller purposes are to insert three scan lines and be to produce four scan lines by a computing of upper and lower scan line between first scan line at per three scan line places and the 3rd scan line.
4. according to the device of claim 1, wherein said clock generator comprises: a clock generator spare is used for exporting a 910f according to a horizontal-drive signal of exporting from sync separator
HWrite clock signal;
The one 2 a times of multiplexer is used to the 910f that doubles
HWrite clock signal and be used to export a 1820f
HRead clock signal; And
One first toggle flip-flop is used for exporting a read/write mode signal according to a horizontal-drive signal of exporting from sync separator.
5. according to the device of claim 1, wherein said withdrawal device comprises:
One address counter is used to count the 910f that exports from clock generator
HWrite clock signal and be used to export a write address;
One the 22 times of multiplexer is used to the write address that doubles and export from this address counter; And
The read and write mode signal that basis is exported from this toggle flip-flop is used for selectively exporting the write address exported from address counter and reads the address from what the 22 times of multiplexer exported by first switch of switching.
6. according to the device of claim 1, wherein said digraph resembles video signal generator and comprises:
Third and fourth line storage is used for writing from the first and second zoom controller outputs as 910f according to the read/write mode signal of exporting from above-mentioned toggle flip-flop
HWrite clock signal first and second vision signals and be used to read as 1820f
HOdd number first and second vision signals of read clock signal;
One divider is used to receive the 1820f from the one 2 times of multiplexer
HLeading (leading) clock signal also is used for this signal divided by 910f
H
One second toggle flip-flop is used for having a high level and a low level clock signal according to an output of divider for a horizontal scanning period output;
The clock signal that basis is exported from described second toggle flip-flop and the second switch of alternately being transferred is used to export first and second vision signals of being read by described third and fourth line storage;
A scan line counter is used for the count level synchronizing signal and is used to export an alphabetical frame control signal; And
A frame memory is used for resembling as digraph from described second switch according to the write address storage of address counter a vision signal of vision signal output, and be used for one reading the address and reading the digraph of being stored and resemble vision signal, and be used to export a pair of image video signal according to the alphabetical frame control signal of being exported from the scan line counter with from what 2 times of multiplexers were exported.
7. according to the device of claim 1, wherein said video signal selector comprises:
One the 3rd switch is used to receive first and second vision signals exported from first and second zoom controllers and resembles digraph that video signal generator exports from digraph and resembles vision signal and be used for according to a mode select signal output signal;
And a D/A converter is used for the selected vision signal of described the 3rd switch is converted to an analog signal.
8. according to the device of claim 1, wherein said this withdrawal device comprises:
An address counter is used to count the 910f that is exported from the clock generating device of clock generator
HWrite clock signal and be used to export a write address;
2 times of multiplexer be used to double this write address and be used to export a 1820f
HRead the address; And
First and second multiplexers are used for receiving respectively from the write address of described address counter and 2 times of multiplexers and read the address, and are used for according to a read/write signal output signal.
9. according to the device of claim 1, wherein said digraph resembles video signal generator and comprises:
One the 3rd toggle flip-flop is used to receive horizontal-drive signal and is used to export one selects signal;
One the 4th toggle flip-flop is used for selecting signal to export a read/write signal according to one of described the 3rd toggle flip-flop;
The 4th switch of selecting signal to replace switching according to described the 3rd toggle flip-flop is used to export described scan line insertion first and second vision signals therebetween;
Fifth line memory is used for according to a read/write address of exporting from described first multiplexer and read/write first and second vision signals, wherein set by an inverter anti-phase read/write signal;
One the 6th line storage is used for according to a read/write address of exporting from described second multiplexer and read/write first and second vision signals, and this multiplexer is set according to a read/write signal of described the 4th toggle flip-flop;
The 32 a times of multiplexer this horizontal-drive signal that is used to double;
One the 4th toggle flip-flop is used to receive an output of described the 32 times of multiplexer and is used for having a high level and a low level clock signal for a horizontal scanning period output;
One the 3rd multiplexer is used for selectively exporting first and second vision signals of exporting from the described the 5th and the 6th line storage for a horizontal scanning period according to a clock signal of exporting from described the 5th toggle flip-flop;
A scanning and counting is used for the count level synchronizing signal and is used to export an alphabetical frame control signal; And
A frame memory is used for according to write address of exporting from address counter and the vision signal of exporting a pair of image from the alphabetical frame control signal that the scan line counter is exported.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2490/95 | 1995-02-10 | ||
| KR1019950002490A KR0174301B1 (en) | 1995-02-10 | 1995-02-10 | Double screen apparatus of wide tv |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1135695A CN1135695A (en) | 1996-11-13 |
| CN1096792C true CN1096792C (en) | 2002-12-18 |
Family
ID=19407963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96101375A Expired - Lifetime CN1096792C (en) | 1995-02-10 | 1996-02-08 | Double picture producing apparatus for wide screen television |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR0174301B1 (en) |
| CN (1) | CN1096792C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107454283B (en) * | 2016-06-01 | 2020-12-01 | 联发科技股份有限公司 | Video signal output system and method |
-
1995
- 1995-02-10 KR KR1019950002490A patent/KR0174301B1/en not_active IP Right Cessation
-
1996
- 1996-02-08 CN CN96101375A patent/CN1096792C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR0174301B1 (en) | 1999-03-20 |
| CN1135695A (en) | 1996-11-13 |
| KR960033097A (en) | 1996-09-17 |
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