CN201156737Y - Audio and video switching control system - Google Patents
Audio and video switching control system Download PDFInfo
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- CN201156737Y CN201156737Y CNU200820078569XU CN200820078569U CN201156737Y CN 201156737 Y CN201156737 Y CN 201156737Y CN U200820078569X U CNU200820078569X U CN U200820078569XU CN 200820078569 U CN200820078569 U CN 200820078569U CN 201156737 Y CN201156737 Y CN 201156737Y
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Abstract
The utility model relates to an audio-video switching and controlling system, which comprises a front emitting panel and a back control panel. The front emitting panel comprises four keys and an encoder; the four keys are sued for regulating the volume or switching the channel; the back control panel comprises a decoder that is used for receiving the audio-video controlling signals from the encoder, a decoder that is used for selecting and controlling the counter, codes, a door, a first counter, a volume regulator, a second counter and an audio-video switcher; the first counter and the volume regulator are used for regulating and controlling the volume; the second counter and the audio-video switcher are used for switching and controlling the channel. The system completely adopts hardware to switch the channel of audio-video signals; and the hardware has a simple structure. Therefore, the system shortens the design and production period, reduces the costs of the products, and further improves the problem that the audio-video switching and controlling system has high costs and long production periods.
Description
Technical field
The utility model relates to a kind of audio frequency and video handover control system, relates in particular to a kind of system that the multichannel audio-video frequency signal is carried out switching controls and output.
Background technology
In the patent No. is 95204826.4 utility model patent, records and monitor the technical scheme that four road sources of sound are play.This patent specifically discloses by automated manner (555 produce pulse) or manual mode and has produced pulse control counter 4017 countings, make the technical scheme of a road in 4052 selections, four road sources of sound, this utility model has realized that by this mode input is selected to four road audio frequency.
Can realize the prior art of multichannel audio-video frequency input signal selection handoff functionality, multiclass is similar to the disclosed technical scheme of above-mentioned utility model, and it mainly cooperates special-purpose software to realize by hardware such as single-chip microcomputer and audio frequency and video switching matrix.The subject matter that this technical scheme exists has two aspects: on the one hand, must cooperate special-purpose software to use as hardware such as audio frequency and video switching matrix, so need certain software development time cycle; On the other hand, the cost of audio frequency and video switching matrix chip is higher, in commercial Application, makes the cost integral body of product improve.So existing audio frequency and video handover control system product often has cost height, long defective of construction cycle.
The utility model content
The purpose of this utility model provides a kind of simple in structure, and the design cycle is short, and audio frequency and video handover control system with low cost.
For achieving the above object, the utility model provides a kind of audio frequency and video handover control system, comprising: prime expelling plate and back level control board, and
This prime expelling plate comprises:
The channel that the volume that the volume that is used to increase volume increases progressively button, be used to reduce volume successively decreases button, be used to increase progressively switching channels increases progressively button and the channel of the switching channels that is used to successively decrease successively decreases button;
Increase progressively successively decrease button, channel of button, volume with volume and increase progressively button and the channel button that successively decreases and be connected respectively, be used to detect the operation of pressing of each button, and the encoder of output audio frequency and video control signal;
This back level control board comprises:
Be connected with this encoder, be used to receive the audio frequency and video control signal, and the decoder of output pulse triggering signal and counting controling signal;
Be connected with decoder, be used for the count pick up control signal, and export the decoder of first count signal, first decoded signal, second count signal and second decoded signal according to counting controling signal;
Be connected with decoder, be used to receive first count signal, first decoded signal, second count signal and second decoded signal, and according to first count signal and first decoded signal output, the first counting gating signal, and according to the decoding and door of second count signal and second decoded signal output, the second counting gating signal;
Be connected respectively with door with decoder, decoder and decoding, be used for received pulse triggering signal, first count signal and the first counting gating signal, and first counter of output volume control signal;
Be connected respectively with door with decoder, decoder and decoding, be used for received pulse triggering signal, second count signal and the second counting gating signal, and second counter of output audio frequency and video switching signal;
Be connected with second counter, be used to receive the audio frequency and video switching signal, the multipath audio signal and the vision signal of input are switched according to the audio frequency and video switching signal, and the audiovideo switcher of difference output audio signal and vision signal;
Be connected respectively with audiovideo switcher with first counter, be used for volume of reception control signal and audio signal, regulate the volume of audio signal according to volume control signal, and the volume adjuster play to amplifirer of the audio signal output after will regulating.
The utility model proposes a kind of audio frequency and video handover control system, the channel that this system uses hardware to finish audio-video signal fully switches, and hardware configuration simplicity of design, can shorten design and the cycle of producing, reduce product cost, thereby improve audio frequency and video handover control system cost height, long problem of production cycle.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the utility model audio frequency and video handover control system specific embodiment one;
Fig. 2 is the electrical block diagram of encoder in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 3 is the electrical block diagram of decoder in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 4 is the electrical block diagram of decoder in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 5 be in the utility model audio frequency and video handover control system specific embodiment one decoding with the door electrical block diagram;
Fig. 6 is the electrical block diagram of first counter in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 7 is the electrical block diagram of second counter in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 8 is the electrical block diagram of video switcher in the utility model audio frequency and video handover control system specific embodiment one;
Fig. 9 is the audio switch electrical block diagram in the utility model audio frequency and video handover control system specific embodiment one;
Figure 10 is the volume adjuster electrical block diagram in the utility model audio frequency and video handover control system specific embodiment one;
Figure 11 uses No. five distributor circuit structural representations that video switcher connects in the novel audio frequency and video handover control system specific embodiment one for this;
Figure 12 uses the structural representation of prime expelling plate in the novel audio frequency and video handover control system specific embodiment one and back level control board two line connected modes for this;
Figure 13 is the structural representation of the utility model audio frequency and video handover control system specific embodiment two;
Figure 14 is the electrical block diagram of radiofrequency launcher in the utility model audio frequency and video handover control system specific embodiment two;
Figure 15 is the electrical block diagram of radio frequency decoder and radio frequency and door in the utility model audio frequency and video handover control system specific embodiment two;
Figure 16 is the structural representation of the utility model audio frequency and video handover control system specific embodiment three;
Figure 17 is the structural representation of the utility model audio frequency and video handover control system specific embodiment four;
Figure 18 is in the utility model audio frequency and video handover control system specific embodiment four or the electrical block diagram of door.
Description of reference numerals:
10-prime expelling plate 11-volume increases progressively the button 12-volume button that successively decreases
The 13-channel increases progressively the button 14-channel button 15-encoder that successively decreases
16-radio frequency decoder 17-radio frequency and door 18-relay
Level control board 21-decoder behind the 19-silence switch 20-
22-decoder 23-decoding and door 24-first counter
The 25-second counter 26-video switcher 27-volume adjuster
28-audio switch 29-or the quiet control line of door 40-
50-amplifirer 60-power line 70-ground wire
80-triode 90-resistance 100-coupling capacitance
Embodiment
Embodiment one
Be illustrated in figure 1 as the structural representation of the utility model audio frequency and video handover control system specific embodiment one, this system mainly comprises two parts: prime expelling plate 10 and back level control board 20.
Wherein, the structure of prime expelling plate 10 specifically can comprise: a key panel, four buttons are set at least, the channel that be that the volume that is used to increase volume increases progressively button 11, the volume that is used to reduce volume is successively decreased button 12 respectively, is used to increase progressively channel increases progressively button 13 and the channel of the channel that is used to successively decrease successively decreases button 14 on it.
Prime expelling plate 10 also comprise with key panel on the encoder 15 that links to each other respectively of button.In the present embodiment, button is pressed from the mode of encoder 15 output signals and is specifically adopted dual-tone multifrequency (DualTone Multi Frequency, hereinafter to be referred as DTMF) form of code signal realizes, four buttons are the combination of each the kind frequency signal in corresponding encoder 15 medium-high frequency groups and the low frequency group signal respectively.After certain button is pressed, just chosen corresponding row and column, just chosen the combination of corresponding high/low frequency signal, be equivalent to high/low frequency composite signal of selected output.Encoder 15 is used to detect the operation of pressing of each button, and exports the audio frequency and video control signal behind this encoder 15, and this audio frequency and video control signal is a dtmf signal.In the present embodiment, editing machine 13 specifically can adopt the chip of UM9559 model, as shown in Figure 2, use [14] on the UM9559 chip respectively, [13], [4] and [3] number pin as receiving terminal, connect four buttons on the key panel, detect volume respectively and increase progressively button 11, the volume button 12 that successively decreases, channel increases progressively the successively decrease operation of pressing of button 14 of button 13 and channel, height through the UM9559 chip internal, low frequency group D/A separately converts the dextrorotation ripple to, mix addition through adder again, after the RAM unloading, from [16] number pin, i.e. the output of encoder 15 output audio frequency and video control signals (TONE).
The structure of back level control board 20 specifically can comprise: decoder 21, decoder 22, decoding and door 23, first counter 24, second counter 25, video switcher 26, volume adjuster 27, audio switch 28 and amplifirer 50.
This decoder 21 and encoder 15 link to each other by signal control line, are used for the audio frequency and video control signal of received code device 15 outputs, and according to this audio frequency and video control signal output pulse triggering signal and counting controling signal.12V general supply on the level control board of back links to each other with the ground end by power line and the ground wire 12V power supply corresponding with the prime expelling plate respectively with ground.In the present embodiment, can adopt the chip of MT8870 model as decoder 21, as shown in Figure 3.[2] number pin of MT8870 chip, the receiving terminal that is decoder 21 is used for receiving audio frequency and video control signals (TONE) by signal control line, [3] number pin is that pin is selected in gain, and after [15] number pin is exported pulse triggering signal (CP), when promptly pressing one-touch, just from decoder 21, it is [15] number variation edge of pin output of MT8870 chip, for example when detecting button and press, can not be low level, just export a high level when detecting button and pressing, form a rising edge.Simultaneously, warp [13], [12] and [11] number pin are exported three signals (C1, B1, A1) of " 8421 " sign indicating number form respectively, jointly as counting controling signal, in fact promptly the audio frequency and video control signal are decoded.
This decoder 22 links to each other with decoder 21, is used for the count pick up control signal, and exports first count signal, first decoded signal, second count signal and second decoded signal according to counting controling signal.In the present embodiment, decoder 22 specifically can adopt the chip of 74LS138 model, as shown in Figure 4, [3] of 74LS138 chip, [2] and [1] number pin link to each other with [13], [12] and [11] number pin of MT8810 chip respectively, count pick up control signal (C1, B1, A1), then export first count signal (Y1) from [14] number pin of 74LS138 chip, export first decoded signal (X1) from [13] number pin, export second decoded signal (X2) from [11] number pin, export second count signal (Y5) from [10] number pin.
This decoding is connected with decoder 22 with 23, be used to receive first count signal, first decoded signal, second count signal and second decoded signal, and according to first count signal and first decoded signal output, the first counting gating signal, and according to second count signal and second decoded signal generation, the second counting gating signal.In the present embodiment, can specifically adopt the chip of 74LS08 model as decoding and door 23, as shown in Figure 5.Then [9] number pin of 74LS08 chip links to each other with [14] number pin of 74LS138 chip, be used to receive first count signal (Y1), [10] number pin of 74LS08 chip links to each other with [13] number pin of 74LS138 chip, be used to receive first decoded signal (X1), [4] number pin of 74LS08 chip links to each other with [11] number pin of 74LS138 chip, be used to receive second decoded signal (X2), [5] number pin of 74LS08 chip links to each other with [10] number pin of 74LS138 chip, is used to receive second count signal (Y5).The first counting gating signal (CE1) of the warp of 74LS08 chip [8] number pin output then is through [6] number pin output second counting gating signal (CE2).Decoding is to cooperate with decoder 22 with the effect of door 23, counting controling signal to decoder 21 outputs carries out logical combination, usually the form of counting controling signal is the form of " 8421 " sign indicating number, " 8421 " sign indicating number is carried out logical combination control the work of first counter 24 and second counter 25 to produce signal.
This first counter 24 is used for the regulating and controlling volume, it is connected respectively with door 23 with decoder 21, decoder 22 and decoding, be used for from decoder 21 received pulse triggering signals, receive first count signal and receive the first counting gating signal from decoding and door 23 from decoder 22, and to output volume control signal after the above-mentioned signal processing.In the present embodiment, can adopt the chip of 74F190 model as first counter 24, as shown in Figure 6.Then [14] number pin of 74F190 chip links to each other with [15] number pin of MT8870 chip, is used for received pulse triggering signal (CP); [5] number pin of 74F190 chip links to each other with [14] number pin of 74LS138 chip, is used to receive first count signal (Y1); [4] number pin of 74F190 chip links to each other with [8] number pin of 74LS08 chip, is used to receive the first counting gating signal (CE1).First counter 24 then, promptly the 74F190 chip is exported three signals of low three respectively as volume control signal (R from [6], [2] and [3] number pin
2, R
1, R
0).
This second counter 25 is used to control switching channels, itself and first counter 24 are similar, be connected respectively with door 23 with decoder 21, decoder 22 and decoding, be used for from decoder 21 received pulse triggering signals, receive second count signal and receive the second counting gating signal from decoding and door 23 from decoder 22, and to output audio frequency and video switching signal after the above-mentioned signal processing.In the present embodiment, also can adopt the chip of 74F190 model as second counter 25, as shown in Figure 7.Then [14] number pin of 74F190 chip links to each other with [15] number pin of MT8870 chip, is used for received pulse triggering signal (CP); [5] number pin of 74F190 chip links to each other with [10] number pin of 74LS138 chip, is used to receive second count signal (Y5); [4] number pin of 74F190 chip links to each other with [6] number pin of 74LS08 chip, is used to receive the second counting gating signal (CE2).Second counter 25 then, promptly the 74F190 chip is exported three signals of low three respectively as audio frequency and video switching signal (Q from its [6], [2] and [3] number pin
2, Q
1, Q
0).
This video switcher 26 is connected with second counter 25, is used to receive low two signals of audio frequency and video switching signal, and according to this audio frequency and video switching signal the multi-channel video signal of importing is carried out the channel switching.In the present embodiment, specifically can adopt the chip of CD4052 model as video switcher 26, as shown in Figure 8.Then [9] of CD4052 chip and [10] number pin and second counter 25 are that [2], [3] number pin of 74F19 chip links to each other, and are used to receive this audio frequency and video switching signal (Q
2, Q
1, Q
0) low two (Q
1, Q
0), according to this audio frequency and video switching signal (Q
1, Q
0), the CD4052 chip to from its [4], [2], four tunnel vision signals (V1In, V2In, V3In and V4In) of [5] and [1] number pin input select to switch, and from [3] pin with the vision signal output of selecting.
Similar with video switcher 26, this audio switch 28 is connected with second counter 25, is used for receiving low two of audio frequency and video switching signal of second counter, 25 outputs, then according to the audio frequency and video switching signal multipath audio signal of input is carried out channel and switches.In the present embodiment, specifically can adopt the chip of CD4052 model as audio switch 28, as shown in Figure 9.Then audio switch 28 be CD4052 chip [9] with [10] number pin and first counter 24 is that [2], [3] number pin of 74F190 chip links to each other, and is used to receive this audio frequency and video switching signal (Q
2, Q
1, Q
0) low two (Q
1, Q
0), according to this audio frequency and video switching signal (Q
1, Q
0), the CD4052 chip to from its [11], [15], [14], four tunnel audio signals of [12], [4], [2], [5] and [1] number pin input select to switch (input of four tunnel audio signals is not shown in the figures), from [3] pin with audio signal (Wout) output of selecting.And [3] number pin by the CD4052 chip and volume adjuster 27 be that the resistance input of CD4051 chip is connected, and transmitting audio signal is regulated to finish volume.
This volume adjuster 27 is connected respectively with audio switch 28 with first counter 24, be used for from first counter, 24 volume of reception control signals, and from audio switch 28 received audio signals, regulate the volume of audio signal according to volume control signal, and the audio signal output after will regulating plays to amplifirer 50, and amplifirer 50 can be arranged on the level control board 20 of back and also can independently be provided with.In the present embodiment, specifically can adopt CD4051 model chip to connect the form of several resistance as volume adjuster 27, as shown in figure 10.Then [9] of CD4051 chip, [10] and [11] number pin and first counter 24, [6], [2] and [3] number pin of being the 74F190 chip link to each other, and above-mentioned three control ends of CD4051 chip are used to receive the low tribute signal of first counter, 24 outputs as volume control signal (R
2, R
1, R
0); CD4051 chip and audio switch 28 are [3] number pin received audio signal of CD4052 chip.The CD4051 chip is according to volume control signal (R
2, R
1, R
0) adjust the number of external resistor, change the resistance of circuit, thereby realize adjusting the audio signal volume, the audio signal after the adjusting exports amplifirer 50 to from [3] number pin of CD4051 chip and plays.
The concrete course of work of present embodiment audio control system comprises to the control of volume with to the switching of channel.At first, when this audio frequency and video handover control system power on start working after, the default setting channel is first channel, the wave volume rank is minimum.At this moment, the initial value of second counter is " 000 ", and promptly the level of [13] of second counter (74F190 chip), [12] and [11] number pin output is low level " LLL ", and wherein " L " represents low level.The initial value of first counter is identical with the initial value of second counter.Successively decrease button when being pressed when channel increases progressively button or channel, promptly control the switching channels increasing or decreasing, press one-touch, just switch channel one time.Successively decrease button when being pressed when volume increases progressively button or volume, promptly control the adjusting of volume, press one-touch, just volume is regulated one-level.
Increasing progressively with the control switching channels is example.After pressing channel and increasing progressively button, encoded device is handled back output audio frequency and video control signal; After the audio frequency and video control signal is input to decoder, be " HLH " by [13] of decoder (MT8870 chip), the level of [12] and [11] number pin output, wherein " H " represents high level, i.e. " 8421 " sign indicating number " 101 "; After " HLH " level inputs to decoder, the signal of [11] and [10] of decoder (74LS138 chip) number pin output is input to decoding to carry out and operation with door, because the level of decoder (74LS138 chip) [10] number pin output is a low level, thus with the operation back from decoding and door can output low level the second counting gating signal (CE2) to [4] number pin of second counter (74F190 chip); Simultaneously, second count signal of [10] of decoder (74LS138 chip) number pin output is low level " L ", and this low level is transferred to [5] number pin of second counter (74F190 chip) and controls upwards counting of second counter; Meanwhile, decoder (MT8870 chip) also can be given second counter (74F190 chip) [14] number pin by [15] number trigger impulse of pin output when each button, trigger its upwards operation of counting; Second counter (74F190 chip) can be started working under the low level second counting gating signal, under low level second count signal control, realize upwards counting, upwards the rising edge that operates in the counting triggering signal of counting is performed, so, low two of second counter at this moment, promptly [2] and [3] number pin can be exported " LH " level; Should be transferred to [9], [10] number pin of audio switch (CD4052 chip) and video switcher (CD4052 chip) simultaneously by " LH " level, thereby synchronously from input of four road audio frequency and the input of four road videos, select to switch to the Voice ﹠ Video of same road program.Present embodiment interferes with each other for preventing audio frequency and video, so selected for use two four to select a switch, be audio switch and video switcher, if together with sound, video signal mixture, also can only adopt one four and select a switch, receive the audio frequency and video switching signal, finish the switching of channel from second counter as audiovideo switcher, audio signal can output to volume adjuster, and vision signal can output to display unit.That is: this audiovideo switcher comprises two kinds of specific embodiment modes at least, a kind of for adopting multiselect one switch to realize the switching of audio-video mixed signal, another kind of for adopting two multiselect one switchs to realize that respectively audio signal is switched and vision signal is switched, preferably adopt a kind of execution mode in back.Further, output at video switcher can connect First Five-Year Plan road distributor circuit, be used to receive the road vision signal (Vout) after selecting, and it further is distributed into five tunnel vision signals (Lcd1, Lcd2, Lcd3, Lcd4 and Lcd5) exports demonstration, the specific implementation of this No. five distributor circuit can be as shown in figure 11.Channel successively decrease operation principle of switching and the similar process that increases progressively switching, channel successively decreases when switching, from the level of decoder (MT8870 chip) [13], [12] and [11] number pin output is " HLL ", promptly " 8421 " sign indicating number " 100 ", when second count signal is high level, control second counter counts downward, when the second counting gating signal is high level, second counter is not worked not by gating.
To regulate that volume increases is example, and when volume increased progressively button and pressed, encoder detected pressing of button, handles back output audio frequency and video control signal and gives decoder; Then the level of [13] of decoder (MT8870 chip), [12] and [11] number pin output is " LLH "; After decoder is handled, [14] of decoder (74LS138 chip) number pin output low level " L ", [13] and [14] number pin output level of decoder (74LS138 chip) is to decoding and door, because that decoder (74LS138 chip) [14] number pin output is low level " L ", so with output low level " L " [4] number pin, can start working after decoding is operated with Men Jingyu with gating first counter to first counter (74F190 chip); Simultaneously, [14] of decoder (74LS138 chip) number pin output low level " L " is to [5] number pin of first counter (74F190 chip), to control upwards counting of first counter; Meanwhile, first counter is carried out upwards counting operation from [15] number pin count pick up triggering signal of decoder (MT8870 chip) at the rising edge of counting triggering signal; Then export " LLH " level from [6], [2] and [3] number pin of first counter (74F190), promptly " 001 " of output " 8421 " sign indicating number is to [9], [10] and [11] number pin of volume adjuster (CD4051 chip), by changing the number that connects resistance audio-video signal is carried out dividing potential drop, make the wave volume of audio signal output can improve a rank.The control principle that successively decreases of volume is identical with increasing progressively control principle, when volume is successively decreased, from the level of decoder (MT8870 chip) [13], [12] and [11] number pin output is " LHL ", promptly " 8421 " sign indicating number " 010 ", when first count signal is high level, control first counter counts downward, when the first counting gating signal is high level, first counter is not worked not by gating.
In the process of volume control and audio frequency switching, because [4] of first counter and second counter (74F190 chip) decoding that number pin connect is different with the selecting side of door, so it is different to import the counting gating signal of first counter and second counter, can not count simultaneously.
In the counting scheme of present embodiment, realize the switching of audio frequency and video and the adjusting of volume with hardware configuration fully, therefore can avoid of the dependence of audio frequency and video handover control system to special-purpose software, cancelled the development time and the cost of software.On the other hand, the audio frequency and video handover control system hardware configuration of present embodiment is simple, and cost is lower, suits to promote the use of at numerous areas.At present, can according to the existing facility condition of train, can connect by three lines between prime expelling plate and the back level control board, be respectively: power line, ground wire and dtmf signal control line with aboard.
Aboard, these three lines all can have disconnected possibility, when at least two lines are good so, could use.The technical scheme of present embodiment can also realize by two lines between prime expelling plate and back level control board, promptly only link to each other with ground wire by power line, with the audio frequency and video control signal of required transmission,, be coupled in power line and the ground wire and transmit simultaneously by being used of electric capacity and resistance.Wherein a kind of concrete implementation as shown in figure 12.Wherein, be connected with power line 60 and ground wire 70 between encoder 15 and the decoder 21; One triode 80 also is set between encoder 15 and the decoder 21, and the output of encoder 15 output audio frequency and video control signals is connected with the base stage of triode 80, the collector electrode of triode 80 is connected on the power line 60, the emitter of triode 80 is connected on the ground wire 70 by resistance, and the receiving terminal that decoder receives the audio frequency and video control signal is connected on the power line 60 by coupling capacitance.In concrete the application, encoder 15 can adopt the chip of UM9559 model, and decoder 21 can adopt the chip of MT8870 model; [16] number pin of UM9559 chip is connected with the base stage of triode 80, and [2] of MT8870 chip number, [3] number pin are connected on the power line 60 by coupling capacitance 100.From circuit diagram as can be seen, the collector electrode of triode 80 connects [1] number pin of UM9559 chip, the emitter of triode 80 links to each other by [6] number pin of resistance and UM9559 chip, [6] number pin of UM9559 chip is connected to the earth terminal on the level control board of back, [1] number pin of UM9559 chip is by behind the pull-up resistor, and the audio frequency and video control signal is by the frontend amplifying circuit place that is capacitively coupled to the MT8870 chip.
Embodiment two
Be the structural representation of the utility model audio frequency and video handover control system specific embodiment two as shown in figure 13, the difference of this system and embodiment one is: button and encoder adopt the wired connection mode on the prime expelling plate among the embodiment one, and the audio frequency and video handover control system of present embodiment can adopt the wireless connections mode to realize being connected of button and encoder.In this system, the structure of encoder 15, decoder 21, decoder 22, decoding and door 23, first counter 24, second counter 25, volume adjuster 27, audio switch 28 and video switcher 26 and annexation and embodiment one are basic identical, and difference is:
Volume increases progressively successively decrease button, channel of button, volume and increases progressively button and the channel button that successively decreases pressed triggering on the prime expelling plate, and the control of volume and channel is realized with wireless radio frequency mode.Specific implementation is for further being provided with radio frequency decoder 16, radio frequency and 17 and four relays 18 of door, and wherein, radio frequency decoder 16 is used for by the radiofrequency signal that the radio-frequency (RF) receiving circuit volume of reception is regulated or channel switches, and exports corresponding radio frequency decoded signal; Radio frequency is connected with radio frequency decoder 16 with door 17, the received RF decoded signal, and control the disconnection and the closure of four coupled relays 18 respectively by exporting four road pulse signals, four relays 18 are connected on the encoder 15, are used for pressing of analogue-key.In fact pressing of button be exactly the disconnection and the closure of control circuit, so but the pressing of the break-make analogue-key of relay.
In the present embodiment, this audio frequency and video handover control system also comprises independently remote controller, and this remote controller is not arranged on the prime expelling plate, but by radiofrequency signal and the communication of radio frequency decoder.This remote controller is provided with four buttons, and promptly volume increases progressively successively decrease remote keying, channel of remote keying, volume and increases progressively the remote keying of successively decreasing of remote keying and channel; Also be provided with radiofrequency launcher on the remote controller, increasing progressively successively decrease remote keying, channel of remote keying, volume with volume increases progressively the remote keying of successively decreasing of remote keying and channel and links to each other respectively, be used to detect volume and increase progressively successively decrease remote keying, channel of remote keying, volume and increase progressively remote keying and the channel composite signal of remote keying selected output when pressing of successively decreasing, and convert emission of radio frequency signals to and give the radio frequency decoder.Volume increase progressively remote keying, volume successively decrease remote keying, channel increase progressively remote keying and channel successively decrease pressing of remote keying realize function and volume increase progressively button, volume successively decrease button, channel increase progressively button and channel successively decrease the realization function of button can be identical, also be for the adjusting of controlling volume and the switching of channel.Radiofrequency launcher is converted to the operation of pressing of button emission of radio frequency signals and goes out, and in the certain distance scope, the radio frequency decoder can receive this radiofrequency signal.
In the present embodiment, radiofrequency launcher can specifically adopt the chip of SC2262 model, and as shown in figure 14, four buttons are imported from [12], [10], [11] and [13] number pin of SC2262 chip respectively, after converting radiofrequency signal (RF) to, from [17] number pin output.
The radio frequency decoder specifically can adopt the chip of SC2272 model, and radio frequency and door specifically can adopt the chip of 74LS08 model, as shown in figure 15.[14] number pin received RF signal (RF) from the SC2272 chip, then from [12], [10], [11] and [13] number pin output radio frequency decoded signal is to radio frequency [1], [4], [9], [12], [2], [5], [10] and [13] number pin with door 74LS 08 chip, and from [3], [6], [8] and [11] number pin output control volume increase, the volume of 74LS08 chip reduce, four road pulse signals of channel increases progressively switching, channel successively decreases switching are to four relays.Pressing of button in fact also is to realize the break-make of circuit, so the disconnection of relay and closedly be equivalent to simulate button and press the connecting and disconnecting of the circuit of being realized.
In the present embodiment, can fully phase out four buttons on the prime expelling plate, realize audio frequency and video control with RF-wise, four buttons on also can the prime expelling plate are connected on the encoder, make the audio frequency and video handover control system have two kinds of wired and wireless modes of operation concurrently.
In the present embodiment, the radio frequency decoder by and radio frequency and door combination after, receive on the prime expelling plate by four relays, by the RF-wise switching channels, regulate volume.Make the user can manually contact the audio frequency and video handover control system, but by the radiofrequency launcher remote control, thereby make application more convenient.
Embodiment three
Be the structural representation of the utility model audio frequency and video handover control system specific embodiment three as shown in figure 16, present embodiment has increased mute function on the basis of the foregoing description.Its specific implementation is, on the key panel in embodiment one, silence switch 19 is set further, and silence switch 19 directly is connected with amplifirer 50 by quiet control line 40, can directly control amplifirer 50 and close, and realizes quiet.
Embodiment four
Be the structural representation (not shown miscellaneous part) of the utility model audio frequency and video handover control system specific embodiment four as shown in figure 17, be the another kind of concrete mode of audio frequency and video handover control system realization mute function: be specially setting or door 29 on the level control board 20 of back, or door 29 links to each other with first counter 24, be used to receive the volume control signal of first counter, 24 outputs, when volume was adjusted to minimum rank, this volume control signal was input to after combination or door is exportable quiet control signal after 29.Or door 29 and amplifirer 50 between can connect relay, by the disconnection and the closure of quiet control signal control relay, thereby the opening and closing that realize amplifirer 50 are to realize mute function.
In the present embodiment, or door 29 chip that specifically can adopt the 74LS32 model, as shown in figure 18.[1] of 74LS32 chip, [2], [4] and [5] number pin connect [6], [2] and [3] number pin that first counter is the 74F190 chip respectively, are used for volume of reception control signal (R
2, R
1, R
0) and combination R
2|| R
1Then realize its break-make, finish control the amplifirer opening and closing from [6] number quiet relay that controls signal to of pin output of 74LS32 chip.
It should be noted that regulate the volume rank to be transferred to minimumly, similar quiet by volume, but in fact amplifirer is not closed, and is not real mute state yet.
The foregoing description three and four has further been realized mute function with simple hardware construction, has enriched the function of audio frequency and video handover control systems.
On the basis of the foregoing description, decoder can be exported three pins of three pins, the first counter output volume control signal of counting controling signal and two pins of second counter output audio frequency and video switching signal and be connected an indicator light respectively, when high level, light, extinguish during low level.This technical scheme can make things convenient for the user to observe the operating state of audio frequency and video handover control system on the basis of normal execution audio frequency and video switching control function.Can both reach the purpose of being convenient to operate at production debugging with in using.
In the foregoing description of the present utility model, be not limited to adopt among the chip of above-mentioned model and the figure for the capacitance/resistance circuit that each chip disposed, as long as can realize the function of above-mentioned each device.In addition, all be input as example in the foregoing description, but be not limited to four tunnel inputs in the practical application, also can import, as long as select for use suitable chip to realize for multichannel with four tunnel of audio-video signal.
Audio frequency and video handover control system of the present utility model is in concrete the application, the hardware of prime expelling plate can be integrated on the panel, be called preposition platelet, and will a back level control board be integrated in same or another panel on, element on the two panels links to each other by power line, ground wire, signal control line and quiet control line, thereby realizes the channel of audio-video signal is switched and volume control.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1, a kind of audio frequency and video handover control system is characterized in that, comprising: prime expelling plate and back level control board, and
Described prime expelling plate comprises:
The channel that the volume that the volume that is used to increase volume increases progressively button, be used to reduce volume successively decreases button, be used to increase progressively switching channels increases progressively button and the channel of the switching channels that is used to successively decrease successively decreases button;
Increase progressively successively decrease button, channel of button, volume with described volume and increase progressively button and the channel button that successively decreases and be connected respectively, be used to detect the operation of pressing of each button, and the encoder of output audio frequency and video control signal;
Described back level control board comprises:
Be connected with described encoder, be used to receive described audio frequency and video control signal, and the decoder of output pulse triggering signal and counting controling signal;
Be connected with described decoder, be used to receive described counting controling signal, and export the decoder of first count signal, first decoded signal, second count signal and second decoded signal according to described counting controling signal;
Be connected with described decoder, be used to receive described first count signal, first decoded signal, second count signal and second decoded signal, and according to described first count signal and the first decoded signal output first counting gating signal, and according to the decoding and door of described second count signal and second decoded signal output, the second counting gating signal;
Be connected respectively with door with described decoder, decoder and decoding, be used to receive described pulse triggering signal, first count signal and the first counting gating signal, and first counter of output volume control signal;
Be connected respectively with door with described decoder, decoder and decoding, be used to receive described pulse triggering signal, second count signal and the second counting gating signal, and second counter of output audio frequency and video switching signal;
Be connected with described second counter, be used to receive the audio frequency and video switching signal, the multipath audio signal and the vision signal of input are switched according to described audio frequency and video switching signal, and the audiovideo switcher of difference output audio signal and vision signal;
Be connected respectively with audiovideo switcher with described first counter, be used to receive described volume control signal and described audio signal, regulate the volume of described audio signal according to described volume control signal, and the volume adjuster play to amplifirer of the audio signal output after will regulating.
2, audio frequency and video handover control system according to claim 1 is characterized in that, described audiovideo switcher comprises:
Be connected with described second counter, be used to receive described audio frequency and video switching signal, and according to the multipath audio signal audio switch switched of described audio frequency and video switching signal to input, described volume adjuster links to each other with described audio switch;
Be connected with described second counter, be used to receive described audio frequency and video switching signal, and according to the multi-channel video signal video switcher that switch of described audio frequency and video switching signal to input.
3, audio frequency and video handover control system according to claim 1 is characterized in that: also be provided with by quiet control line on the described prime expelling plate and be connected with described amplifirer, be used for exporting to described amplifirer the silence switch of quiet control signal.
4, audio frequency and video handover control system according to claim 1, it is characterized in that: also be provided with described first counter on the described back level control board and be connected, be used to receive described volume control signal, and to described amplifirer export quiet control signal or the door.
5, audio frequency and video handover control system according to claim 1 is characterized in that, also comprises on described prime expelling plate:
Be used for received RF signal, and the radio frequency decoder of output radio frequency decoded signal;
Be connected with the radio frequency decoder, be used for the received RF decoded signal, and control four relays disconnections or closed radio frequency and door respectively by exporting four road pulse signals, described four relays connect described encoder respectively.
6, audio frequency and video handover control system according to claim 5 is characterized in that: also comprise remote controller, described remote controller is provided with:
Volume increases progressively successively decrease remote keying, channel of remote keying, volume and increases progressively the remote keying of successively decreasing of remote keying and channel;
Increasing progressively successively decrease remote keying, channel of remote keying, volume with described volume increases progressively the remote keying of successively decreasing of remote keying and channel and links to each other respectively, selected composite signal when being used to detect described button and pressing, and convert the radiofrequency launcher that emission of radio frequency signals is given described radio frequency decoder to.
7, audio frequency and video handover control system according to claim 1 is characterized in that: described volume adjuster is hilted broadsword eight throw switches that are connected with a plurality of resistance.
8, audio frequency and video handover control system according to claim 1, it is characterized in that: be connected with power line, ground wire and signal control line between described prime expelling plate and the back level control board, described signal control line is connected and transmits described audio frequency and video control signal between the described encoder.
9, audio frequency and video handover control system according to claim 1 is characterized in that: be connected with power line and ground wire between described encoder and the described decoder; Between described encoder and the described decoder triode is set also, the output that described encoder is exported described audio frequency and video control signal is connected with the base stage of described triode, the collector electrode of described triode is connected on the described power line, the emitter of described triode is connected on the described ground wire by resistance, and the receiving terminal that described decoder receives described audio frequency and video control signal is connected on the described power line.
10, audio frequency and video handover control system according to claim 2, it is characterized in that: the output of described video switcher connects one and is used to receive described vision signal, and one tunnel vision signal is distributed into No. five distributor circuits that five tunnel vision signals are exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820078569XU CN201156737Y (en) | 2008-01-16 | 2008-01-16 | Audio and video switching control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820078569XU CN201156737Y (en) | 2008-01-16 | 2008-01-16 | Audio and video switching control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201156737Y true CN201156737Y (en) | 2008-11-26 |
Family
ID=40104513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820078569XU Expired - Fee Related CN201156737Y (en) | 2008-01-16 | 2008-01-16 | Audio and video switching control system |
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| Country | Link |
|---|---|
| CN (1) | CN201156737Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116787A (en) * | 2015-06-26 | 2015-12-02 | 宁波音王电声股份有限公司 | Controller of audio and video media center system |
| CN105450961A (en) * | 2014-08-18 | 2016-03-30 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN114579077A (en) * | 2022-02-23 | 2022-06-03 | 青岛海信宽带多媒体技术有限公司 | Volume control equipment |
-
2008
- 2008-01-16 CN CNU200820078569XU patent/CN201156737Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450961A (en) * | 2014-08-18 | 2016-03-30 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN105116787A (en) * | 2015-06-26 | 2015-12-02 | 宁波音王电声股份有限公司 | Controller of audio and video media center system |
| CN114579077A (en) * | 2022-02-23 | 2022-06-03 | 青岛海信宽带多媒体技术有限公司 | Volume control equipment |
| CN114579077B (en) * | 2022-02-23 | 2024-04-16 | 青岛海信宽带多媒体技术有限公司 | Volume control equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081126 Termination date: 20130116 |