CN1056205A - A kind of trick scan conversion waveform generator for TV - Google Patents
A kind of trick scan conversion waveform generator for TV Download PDFInfo
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- CN1056205A CN1056205A CN 90105807 CN90105807A CN1056205A CN 1056205 A CN1056205 A CN 1056205A CN 90105807 CN90105807 CN 90105807 CN 90105807 A CN90105807 A CN 90105807A CN 1056205 A CN1056205 A CN 1056205A
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- scan conversion
- conversion waveform
- trick
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Abstract
The present invention changes pattern selector, microsystem by sweeping, scan conversion waveform forms circuit and TV synchronised clock source constitutes, and makes the generation software implementation of scan conversion waveform.Can realize that various sweeping such as rotary-type, mosaic type, shaped form, linear pattern and companding type change figure.Circuit of the present invention is simple, the modification of scan conversion waveform and expand very convenient, working stability is reliable, be easy to connect with other computer system, realize operation automation, and price is low, volume is little, can substitute existing equipment, equips a large amount of small television stations, audio-visual centre, closed-circuit television center and CATV center.
Description
The invention belongs to TV technology, it relates to trick scan conversion waveform generator used in a kind of television program designing.
As everyone knows, sweep change be use in the television program designing process very many a kind of stunt means, tool with (or many) curve inswept after, an images of television image carries out the transition to the process of another images gradually.It produces principle is by synthetic one tunnel TV signal of electronic switch with the two-way TV signal, when electronic switch connects that road TV signal, then be subjected to the control of scan conversion waveform, scan conversion waveform be with the row field synchronization the pulse form form, electronic switch is connected one road TV shape number during for low level at scan conversion waveform, and connects another road TV signal during for high level at scan conversion waveform.The method of the most frequently used generation scan conversion waveform is three first-harmonic methods both at home and abroad at present, and the waveform that this method produces triangular wave, sawtooth waveforms and three basic waveform generators of parabolic shape by control carries out various combination and cutting realizes.This method is except three basic waveform generators of needs, every generation is a kind of sweeps to change and broadcasts shape and all need the synthetic and clipper circuit of a cover waveform, cause Circuits System very complicated, need the components and parts of adjusting many especially, thereby make the system cost height, produce inconvenience, poor stability, the tired lock of operation is revised or the expansion scan conversion waveform need be revised circuit.On the other hand, also very difficult generation of this method as rotation class etc. are swept and are changed figure.
It is simple that the present invention is intended to design a kind of circuit, easy to operate, and working stability is reliable, and performance is good, and price is low, and volume is little, be convenient to produce, and the generation of scan conversion waveform, modification or expand scan conversion waveform generator very easily.
The present invention a kind ofly directly produces the animation equipment of scan conversion waveform with microcomputer, changes pattern selector (1), microsystem (2) by sweeping, scan conversion waveform forms circuit (3) and TV synchronised clock source (4) is formed, shown in figure one.Its principle be the user select to sweep change figure after, sweep and change pattern selector and produce corresponding code and deliver to microsystem, microsystem calculates the selected threshold value and the end point values of changing high level in the every row of the corresponding scan conversion waveform of figure of sweeping immediately line by line and also outputs to scan conversion waveform formation circuit line by line, by it these data is converted to required scan conversion waveform and removes to control electronic switch.TV synchronised clock source is by vision signal S
0Isolate line synchronizing signal S
1With field sync signal S
2, make clock φ and TV signal synchronous, these three signals deliver to microsystem respectively and scan conversion waveform forms device, and the present invention is satisfied and the synchronous requirement of television system.
Of the present invention sweeping changed pattern selector and figure selecting is changed in different sweeping different codes takes place delivered to microsystem.Can also control in case of necessity on this basis and sweep some parameter of changing figure, as sweep the throw-over degree, sweep center of changing in figure or the like.These parameters can be delivered to microsystem with its value by setting operation bar on guidance panel.
Microsystem of the present invention is by arithmetic and control unit CPU(5), memory (6), output interface (7), input interface (8), add A/D converter (9) in case of necessity and form, shown in figure two, be connected by data, address and control bus between the each several part.Input interface is swept in order to input and is changed the code that pattern selector produces, and the A/D converter is swept the value of changing each action bars on the figure selecting circuit in order to input, and output interface is then delivered to scan conversion waveform with result of calculation by microcomputer and formed device.In the selection of CPU, because TV signal delegation has only 64 μ s, in the so short time, finish computing again, go out by the number of finishing data, therefore should select the work clock height, the cpu chip that time for each instruction is short.In order to make microsystem synchronous with TV signal easily, require CPU preferably to have two and interrupt the input port, so that line of input synchronizing signal S
1With field sync signal S
2Single-chip microcomputer 51 series in the market, TM320 series can both satisfy above-mentioned requirements.Memory is used for storage system software and as the stochastic storing of running.The course of work of microsystem is: whether CPU receives and just goes to check to have by input interface after the field sync signal and sweep the code input of changing figure, if be provided with action bars, then gating is crossed the value on the A/D converter readback operation bar, start relevant data that corresponding software programs calculates scan conversion waveform thereupon and form circuit by output interface to scan conversion waveform, data computing and output are all carried out synchronously with line synchronizing signal.
Scan conversion waveform of the present invention forms circuit and is made of two set of counters and a trigger (12), and shown in figure three, in two set of counters, one group as starting point counter (10), and one group as terminal point counter (11).The scan conversion waveform that CPU calculates high level occurs in every row threshold value and end point values, sent into starting point counter and terminal point counter respectively, the starting point rolling counters forward is then exported a negative pulse and is given trigger, the trigger output low level becomes high level, the terminal point rolling counters forward then triggers output and then becomes low level by high level, forms required scan conversion waveform signal.The required clock φ of counter is produced by TV synchronised clock source.The selection of the frequency of clock φ is subjected to the restriction of TV resolution, also should be taken into account the choice error in the calculating simultaneously.
TV synchronised clock of the present invention source (4), by synchronizing separator circuit (13), synchronous signal processor (14), counter clock source (15) are formed, shown in figure four.Synchronizing separator circuit is from composite video signal S
0After middle separation synchronizing signal is sent into synchronous signal processor, produce three road signals, wherein two-way-field sync signal S
2With line synchronizing signal S
1As the synchronizing signal of CPU, the counter clock source is sent on another road, and clock φ and TV signal that this clock source vibration is produced are synchronous.
The present invention adopts microcomputer to produce trick scan conversion waveform first, makes the generation software implementation of scan conversion waveform, and dimension circuit of the present invention is simple, and is easy to operate, to the modification of scan conversion waveform with expand and only need modification and coding and needn't change circuit again.The present invention can produce that existing equipment can not produce or sweeping of being difficult to produce changed figure, waits sweeping of rotation class to change figure as windmill-shaped, can also change figure according to programmer's various the sweeping of imagination generation.The present invention itself is exactly a microsystem, and working stability is reliable, is easy to other computer system onlinely, realizes automation of operation.Price of the present invention is low, and volume is little, is convenient to produce, and can satisfy the requirement to common animation equipment of a large amount of cities, TV station at county level, audio-visual centre, CATV and CCTV center, can also use the function of video tape recorder, further simplifies the equipment of micro television platform.
The present invention has following accompanying drawing:
Figure one is a kind of trick scan conversion waveform generator for TV schematic diagram
Among the figure 1 for sweep change pattern selector, 2 for microsystem, 3 be TV synchronised clock source for scan conversion waveform forms circuit, 4.
Figure two is the microsystem structure chart
5 is that s operation control CPU, 6 is that memory, 7 is that output interface, 8 is that input interface, 9 is the A/D converter among the figure.
Figure three forms circuit structure diagram for scan conversion waveform
10 is that starting point calculator, 11 is that endpoint calculation device, 12 is trigger among the figure.
Figure four is a TV synchronised clock source schematic diagram
13 is that synchronizing separator circuit, 14 is that synchronous signal processor, 15 is the counter clock source among the figure.
Figure five is an embodiment of microsystem of the present invention.
An embodiment of the invention are to select for use a computer keyboard to change pattern selector as sweeping, and microsystem, scan conversion waveform formation circuit and TV synchronised clock source are shown in figure five, figure three and figure four.CPU is a single-chip microcomputer 8031 because single-chip microcomputer 8031 has 48 I/O mouths, serial ports and 128 byte RAM this to saving peripheral components, it is very favourable to reduce cost.Most importantly its clock 12MHZ that can work, the time of implementation of most of instruction has only a machine cycle, has the multiplication and division instruction.ROM27256 is used for storage system software.Input interface is one tunnel 16 parallel input port, and output interface is two tunnel 12 a parallel delivery outlet.Because 8031 least-significant byte address and data wire are public, so selected for use a slice latch 74LS373 to come latch address.Two set of counters are 12 counter.Counter clock φ elects 20MHZ as.The following describes when the running of sweeping systems soft ware of the present invention when changing figure and being horizontal draw curtain.A horizontal draw curtain i.e. width of cloth television image is from left to right substituted by another width of cloth television image.After the present invention start, microsystem is in wait state, receive field sync signal after, just go to read to sweep to change pattern selector, if no figure selecting continuation place wait state is then then read in keyboard decoding as if having.Since during horizontal draw curtain in every capable scan conversion waveform threshold value be 0, end point values is by increasing, every beginning-of-line value in, end point values are all the same, the increase factor of establishing every of end point values is X
0Then threshold value is 0 first the time, and end point values is X
0, microsystem outputs to the scan conversion waveform of scan conversion waveform when forming device and forming first line by line.Threshold value is constant in the time of second, and end point values increases X
0, the present invention stops to produce scan conversion waveform during value when promptly a width of cloth television image is replaced by another width of cloth picture fully greater than some values to straight end point values, gets back to wait state.
Claims (7)
1, the present invention is a kind of trick scan conversion waveform generator for TV, it is characterized in that changing pattern selector (1), microsystem (2) by sweeping, scan conversion waveform forms circuit (3) and TV synchronised clock source (4) is formed, after microsystem is received and is swept the figure code and parameter command that changes the pattern selector generation, calculate the relevant data of scan conversion waveform, deliver to scan conversion waveform formation circuit and form corresponding scan conversion waveform, TV synchronised clock source produces the corresponding synchronous signal, makes the present invention and television system synchronous.
2, by the described a kind of trick scan conversion waveform generator for TV of claim 1, it is characterized in that described microsystem is by arithmetic and control unit CPU(5), memory (6), output interface (7), input interface (8) and A/D converter (9) form, be connected by bus between CPU and the other parts.
3, by the described a kind of trick scan conversion waveform generator for TV of claim 1, it is characterized in that described scan conversion waveform generation circuit is made up of starting point counter (10), terminal point counter (12) and trigger (13), the trigger output then of starting point rolling counters forward is changed to high level, gets back to low level and work as the trigger output then of terminal point rolling counters forward.
4, by the described a kind of trick scan conversion waveform generator for TV of claim 1, it is characterized in that described TV synchronised clock source is made up of synchronizing separator circuit (13), synchronous signal processor (14) sum counter clock source (15), synchronizing separator circuit is isolated synchronizing signal by TV signal, deliver to synchronous signal processor and produce line synchronizing signal and field sync signal, and clock φ and TV signal that the counter clock source is produced are synchronous.
5, by the described a kind of trick scan conversion waveform generator for TV of claim 1, the relevant data that it is characterized in that described scan conversion waveform is the threshold value and the end point values of scan conversion waveform high level in every row.
6,, it is characterized in that storing in the described memory with sweeping and change the corresponding systems soft ware of figure by claim 1 or 2 described a kind of trick scan conversion waveform generator for TV.
7, by claim 1 or 2 described a kind of trick scan conversion waveform generator for TV, it is characterized in that described microsystem is by a slice single-chip microcomputer 8031, a slice 74LS373 latch, one tunnel 16 input interface, two tunnel 12 output interface and ROM27256 form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105807 CN1029278C (en) | 1990-04-27 | 1990-04-27 | Trick scan conversion waveform generator for TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90105807 CN1029278C (en) | 1990-04-27 | 1990-04-27 | Trick scan conversion waveform generator for TV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1056205A true CN1056205A (en) | 1991-11-13 |
| CN1029278C CN1029278C (en) | 1995-07-05 |
Family
ID=4879609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90105807 Expired - Fee Related CN1029278C (en) | 1990-04-27 | 1990-04-27 | Trick scan conversion waveform generator for TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029278C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299507A (en) * | 2010-06-28 | 2011-12-28 | 富士电机株式会社 | Driving device for semiconductor element |
-
1990
- 1990-04-27 CN CN 90105807 patent/CN1029278C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299507A (en) * | 2010-06-28 | 2011-12-28 | 富士电机株式会社 | Driving device for semiconductor element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029278C (en) | 1995-07-05 |
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