CN2161035Y - Multifunctional video frequency switching controller - Google Patents
Multifunctional video frequency switching controller Download PDFInfo
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- CN2161035Y CN2161035Y CN 92241891 CN92241891U CN2161035Y CN 2161035 Y CN2161035 Y CN 2161035Y CN 92241891 CN92241891 CN 92241891 CN 92241891 U CN92241891 U CN 92241891U CN 2161035 Y CN2161035 Y CN 2161035Y
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- circuit
- video
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- switch controller
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Abstract
The utility model relates to a multifunctional video frequency switching controller, which has a grid signal generator (7), an audio monitoring amplifier (8), an address switching generator, a display circuit (3), an audio tuning combination circuit (9), etc. The two-way video switching circuit (1) of an equalizing amplifier is connected to the video input/output (IN/OUT) interface, a two-way audio switching circuit (2) with an amplifying head is connected with the audio input/output (IN/OUT) interface, and a separation circuit (4) of line and field sync pulses receives the composite sync signals coming from the two-way video switching circuit (1) with the equalizing amplifier, which are divided into the line and field sync pulses which are sent to a hand-operated automatic control circuit and the circuit (6) of the operation address generator (5) and the audio image conversion.
Description
The video switch controller is the device that is used for the multi-channel video signal of monitoring is carried out switching controls.Can be used for occasions such as security surveillance system.
Video switcher is the device of the automation control system of the domestic development equipment that just becoming, product with units such as Xiamen application television development companies is representative at present, (see Fig. 1, Fig. 2), this video switcher mostly (is seen Fig. 1 with relay, Fig. 2 A) and the solid state circuit (Fig. 2 B) of partly import form, such device is used as diverter switch with the keyboard switch interlocking, or with toggle switch as change action switch (Fig. 2 B), because it is asynchronous with the field frequency that is switched video to switch markers, can cause isolating and shake of picture, this class switching device shifter is pure in addition is unidirectional switching, and this is television teaching and TV with regard to having influenced enterprises and institutions with the equipment of TV monitor system, the requirement that videoconference is used; Moreover traditional switch, the split that as Xiamen application television development company number generator and switch is split (seeing Fig. 2 A), switch and display has caused and has produced and the inconvenience of using by dress; Secondly above-mentioned all kinds of switchs are not all aligned the test signal and the audio frequency monitor signal of image, do not satisfy the user demand of multiple occasion.
The purpose of this utility model will overcome above-mentioned shortcoming exactly, provides a kind of and acts on multiple occasion and multi-functional video switcher that cost is low.To satisfy domestic demand and import substitutes.
According to multi-functional video switch controller of the present utility model, it comprises two-way sound accompaniment commutation circuit (2), sound accompaniment image conversion circuit (6), grid signal generator (7), the audio select amplifier (8) of being with amplifying head, and it is characterized in that: it also comprises: the two-way video commutation circuit (1) of band equalizer amplifier, switching address generator and display circuit (3), row, field system chronizing impulse split circuit (4), manual automatic control circuit and operation address generator (5), audio frequency tuning combiner circuit (9) etc.; The two-way video commutation circuit (1) of equalizer amplifier is connected with video I/O (IN/OUT) interface; The two-way sound accompaniment commutation circuit (2) of band amplifying head is connected with audio frequency I/O (IN/OUT) interface; Row, field system chronizing impulse split circuit (4) receive the two-way video commutation circuit (1) carry equalizer amplifier composite synchronizing signal and with its separation embark on journey, field system chronizing impulse, and deliver to manual automatic control circuit and operation address generator (5) and sound accompaniment imageization circuit (6).
Multi-functional video switch controller of the present invention, it is further characterized in that and adopts the CMOS solid state circuit as diverter switch, two-way video commutation circuit (1) has the commutation circuit that multichannel is imported one tunnel output, and the commutation circuit of one tunnel input multichannel output, its further feature is that also it has the audio surveillance circuit of the visual hearing that audio frequency (sound accompaniment) signal can be shown with visible light ennuple formula on video pictures, and focuses on geometric grid signal generator for regulating monitor.
Below in conjunction with accompanying drawing specific embodiment of the utility model is elaborated.
Fig. 1 is the block diagram of existing video switcher.
Fig. 2 is the structure chart of existing video switcher.
Fig. 3 is the theory diagram of the multi-functional video switch controller of the utility model.
Fig. 4 is the line map of the two-way video commutation circuit of band equalizer amplifier in the utility model.
Fig. 5 is row, the field synchronization split circuit of the multi-functional video switch controller of the utility model.
Fig. 6 is the switching address generator of the multi-functional video switch controller of the utility model and the switching address generator of the sensitive switch in display circuit (3), manual automatic control circuit and the operation address generator (5).
Fig. 7 is the switching address generator of the multi-functional video switch controller of the utility model and the display circuit figure in the display circuit (3).
Fig. 8 is the block diagram of the grid signal generator of the multi-functional video switch controller of the utility model.
Fig. 9 is the theory diagram and the oscillogram of the audio signal imageization circuit of the multi-functional video switch controller of the utility model.
Figure 10 is the double-channel audio tuning combiner circuit figure of the multi-functional video switch controller of the utility model.
The front is described Fig. 1,2 prior art, has just no longer repeated here.
Referring to Fig. 3, from theory structure, multi-functional video switch controller of the present utility model has adopted the commutation circuit 1 of being with the two-way video of equalizer amplifier; And row, field system chronizing impulse split circuit 4 have been increased, sound accompaniment imageization circuit 6, grid signal generator 7 and audio select amplifier 8 than traditional switch; Different with traditional switch is that it has a manual automatic control circuit and operation address generator 5 is coordinated complete machine, to realize multi-function action.Its operation principle summary is as follows: by manual automatic control circuit and operation address generator 5, the switch address and the feature that are pressed into according to operating personnel, make the set of operation address generator, the feature level is delivered to and is switched address generator and each functional circuit, to control the operating state of this circuit, implement functions such as switching or distribution.
Fig. 4 is the two-way video commutation circuit of band equalizer amplifier, and it comprises that multichannel imports the commutation circuit of one tunnel output, and the commutation circuit of one tunnel input multichannel output.2IC among the figure
2, F
2And 2IC
6Form multichannel and imported one road output switching circuit, 2IC
5, TZ, F
1And 2IC
4Formed one tunnel input multichannel output switching circuit, wherein 2IC
4, 2IC
2Be the solid analog switch device circuit of CMOS4000 series, F
1Be that the multichannel of duplicating (distribution) usefulness is penetrated with output amplifier F
2It is the band equalizer amplifier circuit that switches usefulness.Operating principle is as follows: duplicate the operating state that (distribution), switching controls level determine the two-way switch of this video by what manual automatic control circuit of Fig. 3 and operation address generator 5 were brought: (1) is (the switching controls line is locked in low level at this moment) 2IC when distributing control line to be high level
413,5,6,12 and 2IC
5, 13,5 be high level, the vision signal that entered by single channel I/O bus this moment is by analog switch 2IC
5Be transferred to brightness regulating circuit TZ and through F
1Amplification, again by the 2IC of conducting
4Be sent on the multi-channel video I/O bus and export.Because output has multichannel emitter follower function, the output signal on bus does not influence the normal reception of other monitor signal on the bus even that route is short-circuited in other reason yet.Implemented the input of one road video, the distribution function of multi-channel video output.(2) when the switching controls line is high level, (distribute control line to be locked in low level at this moment) and make analog switch 2IC
56,12 pin also be high level, 2IC
58,11,9,10 be the low-resistance conducting state, at Q
0-Q
3Switch under the control of address, on the multi-channel video bus wherein one the tunnel (by Q
0-Q
3State and decide) be switched, vision signal is through F
2Equilibrium amplify, by the 2IC of conducting
5Export on the single channel I/O video line and export.Implemented multi-channel video is selected a function of switching.
The two-way switching of audio frequency bidirectional switch operating form and video does not roughly the same repeat here separately.
Fig. 5 is row, field system chronizing impulse split circuit.This is a pulse-separating circuit by means of the calculus principle, makes it to obtain respectively row, the field system chronizing impulse of 64us and 20ms spacing, and circuit letter knot is convenient.Mandatory declaration be, for make the row that obtains through separation, field system chronizing impulse well with the gate circuit level adapted, used buffering change-over gate circuit 2IC here
11, satisfied subordinate and used interface level demand capable, field system chronizing impulse.Fig. 6 switches address generator for sensitive switch.Function is corresponding to the some of (3) among Fig. 3, (5).
A1-A4 switches the address sensitive switch among the figure, and generator CC4000 series OR circuit and a BCD-to-decimal decoder have been formed the address generator that four stable states are arranged.Switch A
1To A
4The corresponding Q of difference
0～Q
3Address output enters 1IC
314,11,5,2 pin.If there are two above switches to press simultaneously, the state of so last locking depends on that switch of last relieving, ID among the figure
1-ID
4Effect, be to get the enabling signal that the sampled field lock-out pulse is made in the sensitive switch pulse, the principle that other operation address generator circuit in this machine is realized is with to switch address generator the same, different is not interlocking, does not also narrate separately.
Fig. 7 is the Handover Number display circuit.1IC
3Be that data are selected multiplexer, 1IC
9Be a double display driver of decoding, to promote the work of common cathode 7 hop count sign indicating number display tubes, LED
1～LED
4Be respectively the work address display tube, operation principle is as follows: as data selector 1IC
3 Selection control pin 1 pin when being low level, manual switchover address AQ
0～AQ
3Deliver to decoder through selector and show, when 1 pin is high level, automatic switchover address BQ
0～BQ
3, deliver to decoder through selector and show.Be noted that again 1. selector select the control level of control line 1 pin be manually, the automated characterization generator provides.2. selector 1IC
3Output allow 15 pin level controlled by the assigned characteristics generator.15 pin are in high level when distribution state, and output is the high-impedance state display and goes out entirely.3. manually, the automated characterization generator, and assigned characteristics generator principle introduce to some extent in the drawings, omit here and do not state.
Fig. 8 grid signal generator.The grid signal is driven by two clocks.One is horizontal drive, by 5IC
11/2 gate circuit is formed, and one is vertical drive, by 5IC
31/2 gate circuit is formed.Clock signal outputs to two groups of binary counters, two 5IC
31/2 produces row and field system chronizing impulse and their blanking interval, and through the corresponding compound production row of differential, field system chronizing impulse and vertical, horizontal signal through NAND gate (1) NAND gate (2) combination addition, passes through 5T
4Produce synthetic vision signal output.By the way be that the output of grid signal is subjected to 6IC
5The level state control of 6,12 pin, work as 6IC
56,12 pin when being high level, allow the output of grid signal, otherwise close, forbid output.6IC
56,12 pin be controlled by operation address generator given on panel.
Fig. 9 is audio signal image conversion circuit block diagram and waveform.As figure, vision signal is through space, field synchronization after separating, and monostable circuit is passed through in row, field pulse respectively, and its output just can obtain the light belt pulse of a light band through handling.6IC
2Monostable circuit has determined the start of line position length of light belt, 6IC
1Monostable circuit has determined the upper-lower position and the width of light belt.In physical circuit is used, with the triode (6T that has been modulated by audio voltage
1) voltage of EC bipod controls monostable discharging and recharging the cycle, makes that the width and the audio level of output pulse are proportional.The light belt pulse signal be subjected to 2IC
5Analog switch is brought penetrates the vision signal stack of device output, just makes in the vision signal image (cursor) information with sound.In addition, markers oscillogram and cursor TV display position figure from sound accompaniment image conversion circuit working also are not difficult to find out the design basic principle.
Figure 10 is a double-channel audio tuning combiner circuit.
The tuning circuit is by 4IC
3, 4IC
2And some discrete components are formed.4IC
3Be synthetic selector switch, 4IC
3The address generator operation principle is switched in the fine motion that the similar figure six of the course of work introduces, and no longer repeats; 4IC
2For audio frequency switches solid state circuit, operation principle is as follows: 4IC
22 groups of switches be subjected to 4IC
3Control is when pressing CH
1Or CH
2Behind the key, 4IC
39 pin or 6 pin be high level, by the audio signal of 13 pin or 2 pin input 4IC through conducting
2Respectively by 4C
10Lotus root is bonded to amplifier output; Indicate CH when pressing
1/ CH
2The sign compound keys the time 4IC
39 pin, 6 pin be high level, by 4IC
3The high-frequency signal of 13 pin, 2 pin input all be sent to 4C
10The synthetic subordinate's amplifier that is coupled to amplifies output; No matter mandatory declaration is operated in any state CH
1, CH
2The intensity of output signal is decided by adjustable 4W
1, 4W
2, this has also just satisfied the functional requirement of double-channel audio being carried out tuning.
Combination through above main circuit, the multi-functional video switch controller of the utility model, switch image and be better than traditional switch, not only also enhancement function slightly of video is opposed in not decay mutually, moreover also has one tunnel distribution and other function that is dispensed to multichannel, be one and have precedence over the multi-functional video switch controller of existing like product both at home and abroad, satisfied the needs of every field to video switcher, and switch controller to be keyboard portable, convenient for users.
Claims (6)
1, a kind of multi-functional video switch controller, it comprises two-way sound accompaniment commutation circuit (2), sound accompaniment image conversion circuit (6), grid signal generator (7), the audio select amplifier (8) of being with amplifying head, and it is characterized in that: it also comprises: the two-way video commutation circuit (1) of band equalizer amplifier, switching address generator and display circuit (3), row, field system chronizing impulse split circuit (4), manual automatic control circuit and operation address generator (5), audio frequency tuning combiner circuit (9) etc.; The two-way video commutation circuit (1) of equalizer amplifier is connected with video I/O (IN/OUT) interface; The two-way sound accompaniment commutation circuit (2) of band amplifying head is connected with audio frequency I/O (IN/OUT) interface; Row, field system chronizing impulse split circuit (4) receive the two-way video commutation circuit (1) carry equalizer amplifier composite synchronizing signal and with its separation embark on journey, field system chronizing impulse, and deliver to manual automatic control circuit and operation address generator (5) and sound accompaniment imageization circuit (6).
2, according to wanting profit to require 1 described multi-functional video switch controller, it is characterized in that adopting the CMOS solid state circuit as diverter switch.
3, according to the described multi-functional video switch controller of claim 1, it is characterized in that two-way video commutation circuit (1) has the commutation circuit that multichannel is imported one tunnel output, and the commutation circuit of one tunnel input multichannel output.
4,, it is characterized in that it has sensitive switch and switches address generator according to the described video switch controller of claim 1.
5,, it is characterized in that it has the audio surveillance circuit of the visual hearing that audio frequency (sound accompaniment) signal can be shown with visible light ennuple formula on video pictures according to the described video switch controller of claim 1.
6,, it is characterized in that it has for regulating monitor focusing and geometric grid signal generator according to the described video switch controller of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241891 CN2161035Y (en) | 1992-11-27 | 1992-11-27 | Multifunctional video frequency switching controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92241891 CN2161035Y (en) | 1992-11-27 | 1992-11-27 | Multifunctional video frequency switching controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2161035Y true CN2161035Y (en) | 1994-04-06 |
Family
ID=33781846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92241891 Expired - Fee Related CN2161035Y (en) | 1992-11-27 | 1992-11-27 | Multifunctional video frequency switching controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2161035Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052127C (en) * | 1995-05-31 | 2000-05-03 | 华邦电子股份有限公司 | Scanning sequence generator |
| CN100423558C (en) * | 2003-07-14 | 2008-10-01 | 松下电器产业株式会社 | Signal switching device, signal distribution device, display device, and signal transmission system |
| CN101146198B (en) * | 2006-09-12 | 2010-06-02 | 索尼株式会社 | Video switching apparatus and video input setting method |
| CN101873505A (en) * | 2010-05-17 | 2010-10-27 | 深圳市同洲电子股份有限公司 | Method and system for synchronously transmitting audio/video signal |
-
1992
- 1992-11-27 CN CN 92241891 patent/CN2161035Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052127C (en) * | 1995-05-31 | 2000-05-03 | 华邦电子股份有限公司 | Scanning sequence generator |
| CN100423558C (en) * | 2003-07-14 | 2008-10-01 | 松下电器产业株式会社 | Signal switching device, signal distribution device, display device, and signal transmission system |
| CN101146198B (en) * | 2006-09-12 | 2010-06-02 | 索尼株式会社 | Video switching apparatus and video input setting method |
| CN101873505A (en) * | 2010-05-17 | 2010-10-27 | 深圳市同洲电子股份有限公司 | Method and system for synchronously transmitting audio/video signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE ADDRESS; FROM: ROOM #, (JINGLI, GUANGBODIANSHIFUWU COMPANY, WUXI CITY, NO. 88, ZHONGSHAN DISTRICT ROAD, WUXI CITY, 214002 TO: NO. 113, ZHENXIN ROAD, WUXI CITY, 214021 |
|
| CP03 | Change of name, title or address |
Address after: 214021 Wuxi New Road No. 113 of Patentee after: Mao Jinsheng Patentee after: Mao Jiansheng Address before: 214002 Wuxi radio and Television Service Company (manager room), No. 88, Wuxi, Zhongshan Road Patentee before: Mao Jinsheng Patentee before: Mao Jiansheng |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |