CN2567732Y - AV signal source multiplex device - Google Patents

Abstract

The utility model a video-audio (AV) signal multiplex device, which is especially designed for KTV owners. The utility model has the technical proposal that televisions in KTV balconies are connected to a plurality of signal sources, such as a projector and video disk device in a multiplex mode to broadcast KTV tracks ordered by customers to each balcony. The video-audio (AV) signal multiplex device is composed of an interchange box and a video-audio signal source interface; the interchange box is connected between an interface and a receiving end point, and the interchange box comprises a video-audio signal source selection circuit and a playing failure detection die set; the video-audio signal source selection circuit is one of the signal sources used for predetermining standby of sequential selection; the playing failure detection die set is used for detecting whether the projector normally delivers a playing image or not. After the video-audio (AV) signal multiplex device is used, waiting time between the ending of a KTV song played at present and the starting of the next song played can be shortened to cause KTV consumers to continuously enjoy the convenience of singing KTV songs without interruption.

Description

Video-audio signal source multiplex's device

Technical field

The utility model relates to AV device, and particularly relevant for a kind of video-audio signal source multiplex's device, it is to be used for the receiving terminal station as televisor is connected to a plurality of audio-visual (AV) signal sources such as projector (VCR) or video disc player (LD) with rotating.

Background technology

KTV (KTV) is a rather well received entertainment way up to the present, wherein utilizes the music image and sound program of similar Music Television (MTV) (MTV) program of televising, precisely because in there is no the particular songs music of singing sound and vocal accompaniment only being arranged.The user is then by singing the vocal music partly (this audio-visual picture is caught up with lyrics progress with the lyrics captions of this song in order to the user) finish this head song to microphone, but and the accompaniment melody of the picture of this user's of KTV system song and this broadcast do the audio mixing processing.Its effect is then similar to mixing the MTV program of user's song.

Normally be recorded on video tape or the optic disk (LD) by the KTV program, it also can be recorded on the new media such as image compact disc (VIDEO CD).In family or private use occasion, the user only needs single KTV unit.Also have in addition the KTV dealer be provided with many between the KTV box, each box all is provided with and aims at the single KTV unit that one group of client uses.In this type of KTV place of business, just need a central broadcasting system to broadcast respectively to these boxes with the KTV song that client is specified.The setting that conventional central is broadcast the chamber is in Fig. 1, and wherein each box is to be connected to the place, video-audio signal source that can be projector, video disc player or image compact disc.If this video-audio signal source is projector, then need use video tape to record KTV song (claiming the vocal accompaniment band).A common volume video tape can be recorded the program of two hours length, only records independent one first KTV song yet be with each to roll up in the employed vocal accompaniment of KTV dealer.The KTV song that this measure allows client can at random select it to like.Client normally finishes the box registration in sales counter, and then client enters the box of appointment again and utilizes the computer selected songs, and is sent to central authorities broadcasting chamber.Take out this client in staff that central authorities play the chamber on then by frame and specify song vocal accompaniment band, be placed on again by the projector that is connected to this box, then again it is sent in the projector in regular turn and play.

The shortcoming of broadcasting mode with tradition be the staff must after repeatedly change these vocal accompaniments and be with.And each when changing vocal accompaniment band time charge about one minute and cause client to wait for down the broadcast of first KTV song impatiently.Therefore, the KTV industry is to need a kind of multiplex's device that connect two or more projectors.Finish its vocal accompaniment strip sowing when sending when a projector, then can make another projector play next KTV song immediately by this multiplex's device.

Use can be recorded the optic disk sheet that reaches 12 first KTV songs and can be addressed the above problem a little.Yet the song that is not all client's appointments all is recorded on on a slice optic disk, therefore still must change video disc often, and the shortcoming of waits for too long still exists.

Content of the present utility model

Fundamental purpose of the present utility model is for a kind of video-audio signal source multiplex's device of the KTV of being used in Play System is provided, and this device can shorten that existing play list finishes and next stand-by period between beginning.

Another purpose of the present utility model is video-audio signal source multiplex's device of realizing providing full automatic central KTV broadcasting system for a kind of.

Another purpose of the present utility model provide a kind of with a plurality of such as projector, video disc player and the KTV song is selected and broadcasting system is connected to video-audio signal source multiplex's device in same broadcasting terminal station.

According to preceding addressing other purpose of the present utility model, this creator is developed the multiplex's device that a kind of novelty, can be used for a plurality of video-audio signal sources that can be projector or video disc player are connected to a specific broadcasting terminal station with rotating.This multiplex's device is partly formed by two: an interchange box and one audio-visual (AV) signal source interface.

If connect projector, then this interface includes two modules: shadow bands detect a detecting module and a shadow bands detecting fault module.Whether these shadow bands detect the detecting module is to be used to detect projector prepare ready for broadcast.If it is ready for broadcast that shadow bands are prepared, then produce a standby (READY) signal.This shadow bands detecting fault module is whether to be used for detecting shadow bands in the projector normal operation.If with the video disc player is example, this standby signal is directly by wherein taking out.

This interchange box is to be connected in this interface and to broadcast the terminal station, and it includes the video-audio signal source and selects circuit and play the detecting fault module.It is to be received standby signal and selected one and play from the video-audio signal source of standby with predefined procedure by each place, video-audio signal source that circuit is selected in the video-audio signal source.And this broadcast detecting fault module is to be used to detect projector the image of not sending broadcast is arranged.

Whether this shadow bands detecting fault module is to occur in order to standby signal after being detected in a schedule time.If there is no behind this Preset Time and record standby signal, then this shadow bands detecting fault module is to produce fault (ERROR) signal, makes the warning horn signal that gives the alarm.Broadcast detecting fault module in the interchange box is whether normally to send video-audio signal in order to the video-audio signal source that detecting connects.

The utility model can cooperate the accompanying drawing with reference to usefulness to be obtained more fully understanding by the detailed description of reading preferred embodiment subsequently again, and wherein this accompanying drawing is:

Description of drawings

Fig. 1 is the synoptic diagram of the central broadcasting system of traditional KTV.

Fig. 2 is the synoptic diagram of utilization according to the KTV central authorities broadcasting system of multiplex's device of the present utility model.

Fig. 3 is that another utilization is according to the KTV central authorities' broadcasting system of the utility model multiplex (MUX) device and the synoptic diagram of the full-automatic optic disk cabinet Play System of combination.

How Fig. 4 connects (multiplex) synoptic diagram to three video-audio signal sources with TV in multiplex's mode according to this multiplex's device of the present utility model.

How Fig. 5 is connected in synoptic diagram between TV and the projector according to this multiplex's device of the present utility model.

Fig. 6 is the process flow diagram of the shadow bands detecting fault module running in multiplex's device interface part of the present utility model.

Fig. 7 be a video disc player how with the utility model multiplex (MUX) device in interchange box partly make the synoptic diagram that interface is connected.

Fig. 8 is a logical circuitry of being located at the video-audio signal source selection circuit in the utility model multiplex (MUX) device interchange box part.

Fig. 9 is a logical circuitry of being located at the interchange box broadcast detecting fault module partly in the utility model multiplex (MUX) device.

Figure 10 A and Figure 10 B are respectively partly actual according to the interchange box in the utility model multiplex (MUX) device

The front and back panel of embodiment.

Figure 11 is the interchange box 9 pin D type joints partly that apply to according to the utility model multiplex (MUX) device.

Figure 12-Figure 15 is a detailed circuit diagram of the present utility model.

Specific implementation of the present utility model

Fig. 2 shows the KTV broadcasting system of utilization according to the utility model video-audio signal multiplex (MUX) device 100.In this preferred embodiment, multiplex's device 10 is to be provided with the Port mouth of three indivedual marks with A, B and C.These three Ports mouths can be connected to multiple video-audio signal source, and such as projector or video disc player, it is to can be three projectors or is two projectors and a video disc player or is three video disc players or for full-automatic optic disk cabinet Play System.Fig. 3 is that the C with its Bu Kou is connected to a cover fully-automatic laser optic disk cabinet Play System 300 and shows extendibility according to the utility model video-audio signal source multiplex's device.In this broadcasting system, each box all is provided with one and is connected to the PC of an automatic optic disk cabinet via network system, this optic disk cabinet is prospecting for customers automatically by bent number of the optic disk of program request that PC is keyed in, and it is written into video disc player and is then play in proper order one by one by the specified program request of client.The image of playing then is sent to multiplex's device 100 via a main switch 310, gives directly delivering to the TV in client's box again.If when being connected to system 300, show that this system 300 is holding state and the signal (be called standby READY signal, hold the back narration) that can play is directly provided by system 300.

By the setting of multiplex's device 100, then the staff can select the vocal accompaniment band of client's program request and place by these projectors, and every projector all is written into a volume vocal accompaniment band.The then just selected in a predefined manner projector of multiplex's device 100 (holding the back statement), and put shadow when the projector of existing operation and finish is the projector that connecting moves is switched to next standby after finishing fast rotation and doing.In this way, the client in the box finishes the KTV song that can enjoy next program request after it puts the shadow action immediately in existing Video Recorder.

How Fig. 4 is connected to three video-audio signal sources with televisor 200 according to multiplex's device 100 of the present utility model, and three video-audio signal sources in this implements are respectively two projectors 11,12 and a video disc player 13.Each multiplex's device 100 is partly formed by two; Interchange box 110 and the interface 120/130 that is installed in each video-audio signal source (because of interface must cooperate different video-audio signals source on structure, with this for this interface mark of projector with 120, for video disc player then mark with 130).In this illustrated preferred embodiment, interchange box is that its A port, B port and C port are connected to first projector 11, second projector 12 and video disc player 13 respectively.

Projector interface 120 is one to be additional to the circuit card in this projector shell.As shown in Figure 5, projector interface 120 detects module 121, shadow bands detecting fault module 122 and alarm unit 123 by shadow bands and is formed.It is to be to be positioned at beginning at present in order to detect this vocal accompaniment band that shadow bands detect module 121, the middle or position of finishing.Beginning and finishing in the shadow bands partly is generally does not have a blank oolemma of magnetic.Be provided with a pair of photoelectric tube (figure does not show) to detect this shadow bands present position near shadow bands two rolling wheel places in the projector.Use photoelectric tube detecting shadow bands location status real as projector built-in function but not the utility model category in one's power, thereby only sketch in this.Suppose that photoelectric tube is output as two no signals of S and E, then the shadow bands location status can be determined by the value of following S and E:

SE represents meaning output

Centre position, 00 shadow bands position rewinds (REW)

01 shadow bands position is in reference position and can play standby (READY)

10 shadow bands have been broadcast and have been finished and be positioned at the final position and move back band (EJECT)

No shadow bands are removed (CLEAR) in 11 projectors

These REW, EJECT, READY and CLEAR output signal also are two bit signals, and CLEAR signal wherein is to be used for inside to reset circuit, and therefore figure does not show.And the generation that rewinds signal is to cause projector that shadow bands are returned back to reference position, and this measure can guarantee that all from the beginning every volume shadow bands play and avoid the shortcoming that begins to play from middle somewhere.On the other hand, the generation of standby signal is that this vocal accompaniment of expression band has been positioned at and starts the position as soon as receive the PLAY signal and just can play immediately.General dealer is used to that (EOS, End-of-song) being recorded on vocal accompaniment has signal least significant end partly with going up record, in order to the indication projector shadow bands is gone to the shadow bands final position forward soon, then produces the fast forward signal that changes this moment with the song end signal.When going to the shadow bands final position soon, photoelectric tube sends then that (S, signal E)=(1,0) and using produce and move back band (EJECT) signal and to impel projector shadow bands are withdrawed from.Below for ease of narration, the standby signal souvenir that people will be received by port mouth A is A-READY, and B, C port mouth receives is to analogize to be B-REAY and C-READY signal.

Projector interface 120 is provided with shadow bands detecting fault module 122 again, it is to be used in detecting vocal accompaniment band whether to reach the fast normal operation in (FF) state of changeing in revolution (REW), the running of relevant this module is to be illustrated among Fig. 6, in the revolution operating state, shadow bands should return back to starting point (only record old its reproduction time of first song because of every volume vocal accompaniment band and be no more than 5 minutes, belt length is no more than 45 seconds rewinding the time) in 45 seconds.This section period is to default in the shadow bands detecting fault module 122, and it is started the clock after projector begins to rewind.Under normal operation, when shadow bands are positioned at starting point, will send standby signal, and this shadow bands detecting fault module 122 be detected in this setting during 45 seconds later this standby signal whether occur.If occur, then promptly hypothesis has the fault thing such as runner slip or cassette tape to take place.Shadow bands detecting fault module 122 will be taked following three kinds of measures at this moment: (1) stops to rewind; (2) relieving circuit produces the function of standby signal; (3) start alarm unit 123 to produce alarm signal, this alarm signal can be flicker and song is taked necessary operation to notify the staff.On the other hand in fast commentaries on classics state, shadow bands detecting fault module 122 is that the detecting shadow bands are put shadow and finished, and goes to magnetic tape trailer automatically soon, and photoelectric tube detects SE and then moves back band immediately for (1,0).If do not withdraw from, then shadow bands detecting fault module 122 will be taked similar measure: (1) stops to rewind; (2) relieving circuit produces the function of standby signal; (3) start alarm unit 123 and inform that to produce alarm signal the staff takes necessary operation.

If with the video disc player is example, because its structure is different with projector, so video disc player interface 130 is also textural variant slightly with projector interface 120.Fig. 7 is the synoptic diagram of video disc player interface 130.Usually the optic disk unit is for once accepting two machines, one body unit of two optic disks.One of The built-in function person is for when video disc is inserted in place and can play, each player then produce as shown in the figure TOP-READY and the two bit signals of BOTTOM-READY.Therefore, video disc player interface 130 be use with this binary signal be input or lock (OR gate), the output of this or lock then is the C-READY signal.The broadcast of these video disc players, move back band and control signals such as selection are identical on function with the control signal of projector, therefore repeat no more.

If the shadow bands non-fault takes place, the interface that connects indivedual video-audio signals source will produce following standby signal: by the A-READY signal in the first video-audio signal source (projector) 11, by the B-READY in the second video-audio signal source (projector) 12 and by the C-READY in the 3rd audio-visual news source (video disc player) 13.As shown in Figure 5, selecting circuit 111 in interchange box 110 video-audio signal source partly is to receive and handle these three READY signals (A-READY, B-READY and C-READY) will be connected to A-PLAY, the B-PLAY of TV 200 and the output signal of C-PLAY to produce three those video- audio signal sources 11,12 or 13 of decision.If selected person is video-audio signal source 11 (first projector), then produces the signal of A-PLAY=0 and touch this projector 11 and begin to play the shadow bands that are placed in one.When being received in the A-PLAY signal, projector 11 is produce to select signal, and this selections signal is to cause switch 114 connections in the interchange box 110 and the audio-visual output of this projector 11 is connected to TV 200.

At the beginning, it is that TV 200 is connected to the video-audio signal source that first sends standby signal that circuit 111 is selected in the video-audio signal source, and selected thereafter video-audio signal source is then selected according to following predetermined recycle design:

A→C→B→C

It is represented for to have under the situation of standby signal, and the order of following table is selected in the video-audio signal source of selecting to be used to be connected to TV 200, that is:

The action that selected Bu Kou takes

A A-READY-1? if yes, A-PLAY=0 then; Otherwise select the C port

C C-READY-1? if yes, C-PLAY=0 then; Otherwise select the B port

B B-READY-1? if yes, B-PLAY=0 then; Otherwise select the C port

C C-READY-1? if yes, C-PLAY=0 then; Otherwise select the A port

Wherein merit attention in each circulation, the C port can be chosen twice and A port and B port all only for selected once.The reason of this design is in preferred embodiment, and the C port is the optic disk unit that is connected to two players, selects specific KTV song only to need button to finish in a player.When a selected port at that time if place, the video-audio signal source of this connection does not send any standby signal, then connecting moves will be along moving to next video-audio signal source.Fig. 8 is the designed logical circuitry of specific function of selecting circuit 111 to carry out according to above-mentioned video-audio signal source.

When causing changeing soon when running into the song end signal in the shadow bands, the shadow bands that its expression is arranged in projector 11 finish playback action and A-READY should give releasing.This action is by being coupled to that circuit 111 is selected in the video-audio signal source before the A-READY signal input and lock (AND gate) 115 and being accomplished.

Please also refer to Figure 12 to Figure 15, when a video-audio signal source was selected, 110 of interchange boxs use to be play fault monitoring circuits 112 and constantly inspects the video-audio signal of being play by selected video-audio signal source and whether normally be sent to TV 200.Play fault monitoring circuit 112 receptions three input signals are arranged; The standby and image switching signal and the comparison signal that are transmitted by existing video-audio signal source, wherein this image switching signal is to be sent by projector itself to inform that this multiplex's device switches to this projector system signal when projector receives the PLAY signal.This comparison signal is to select circuit 111 to be won out by video-audio signal source as shown in Figure 8, consult shown in Figure 9ly, play fault monitoring circuit 112 and include so that relatively to reach the standby binary signal be reaching lock 1121, will reach 6 seconds delay circuit of lock 1121 output delaies 1122 and will postponing 1122 output of output and image switching signal as another and lock 1123 of its input.The output of playing fault monitoring circuit 112 also is two bit signals and it is labeled as fault (ERROR) signal.If ERROR=1, it is illustrated on the playback action of existing projector has fault to produce.And this fault-signal is to touch the alarm unit 113 also be located in the interchange box 110 producing alarm signal, and this alarm signal can be the light emitting diode (LED) of flicker and tweeting sound so that notify the staff to take measures necessary.

Interchange box 110 is to be arranged to shown in Figure 10 A-10B in the use of reality, and wherein this Figure 10 A shows then that for its front control plate face and Figure 10 B it is the control panel face.Among Figure 10 A, the light emitting diode and the alarm 50 that are labeled as A, B and C are all the alarm device that alarm unit 113 is provided.When taking place to play fault, the staff then can learn the place, video-audio signal source of breaking down according to the light emitting diode of flicker.In the rear control plate face shown in Figure 10 B, these three Port A, B and C are the connector that uses 9 pin D types.Except that these connectors, the rear control plate face also provides an image delivery outlet 61 and two voice output holes 62 and 63 to be used to be connected to TV and loudspeaker.Other then is provided with in addition and monitors image change-over switch 70, monitors image delivery outlet 71, interrupts image input hole 72 and cuts song input hole 73, this cuts the song input hole can make client stop the broadcast of this song in playback of songs, and the capable jumping of Jing is toward playing next song via the box switch motion.The creation human desires emphasizes to being for how explanation the utility model is applied to the practice stage in this narration of being done with reference to Figure 10 A and 10B, and wherein said all elements also can be and cooperate different product function demands and add by different way modification and configuration.

As shown in figure 11, another characteristics of the present utility model are all signals transmission and control function that the 9 pin D type joints that are used in A, B and C Bu Kou wherein include single video-audio signal source.On this joint, " broadcast ", " moving back band ", " input " and " selection " etc. are to be the control line between between video-audio signal source and interchange box, " image ", " left side " reach " right side " then respectively representative reach image output, L channel output and the R channel output of TV in each box and loudspeaker.

Generally speaking, image and voice signal line are generally that branch is arranged and the puzzlement that easily causes cable to twine.Therefore all these control lines and signal wire box then can be handled multiplex's device more easily for being contained in the single cable.

The utility model so far is illustrated by illustrative preferred embodiment, and only scope of the present utility model is not limited to some extent because of the description of previous embodiment.On the contrary, the utility model is all similar designs of desiring to be encompassed in the utility model category that is defined in claim.

Claims (7)

1, a kind of video-audio signal source multiplex's device is characterized in that comprising:

(a) build on the interface in each video-audio signal source, whether it includes and is used to detect the video-audio signal source and has prepared readyly for the module of playing that detects, and ready for playing if this signal source has been prepared, then this detects module and will produce standby signal; And

(b) be connected in interchange box between this interface and receiving terminal station, it includes:

(i) circuit is selected in the video-audio signal source, and it is to receive and respond the standby signal that is transmitted by each video-audio signal source and be used for from these ready video-audio signal sources of playing with predefined procedure selecting one; And

(ii) play the detecting fault module, it is to respond this standby signal and be used to detect the image whether selected video-audio signal source sends broadcast.

2, video-audio signal as claimed in claim 1 source multiplex's device, it is characterized in that: be connected to projector, then this interface includes: whether be used for detecting shadow bands in the shadow bands detecting fault module of this projector normal operation.

3, video-audio signal as claimed in claim 1 source multiplex's device is characterized in that: if be connected to the optic disk unit with two broadcast units, then this interface includes: whether be used to detect arbitrary these broadcast units be standby can be for the device of playing.

4, video-audio signal as claimed in claim 1 source multiplex's device is characterized in that: play the detecting fault module and include:

(a) timing device, it is to be used to be detected in the appearance whether Preset Time has this image switching signal later, has recorded the appearance of image switching signal if there is no after this Preset Time, this timing device then produces fault-signal; And

(b) warning device, it is to respond this fault-signal and in order to produce caution signal.

5, video-audio signal as claimed in claim 1 source multiplex's device is characterized in that: this interchange box includes audio-visual broadcast detecting fault device and whether the video-audio signal source that is used to detect this connection is sent to receiving station with video-audio signal.

6, video-audio signal as claimed in claim 1 source multiplex's device, it is characterized in that: this interchange box includes: 9 pin D type joints, it is located on this interchange box and is used for each video-audio signal source is connected to and broadcasts the terminal station, and this 9 pin D type joint comprises all and is connected in control line and all signal wires between between audio-visual news source and broadcasting terminal end between video-audio signal source and this interchange box.

7, a kind of KTV of servo a plurality of boxes central authorities broadcasting system is characterized in that comprising:

(a) automatic K TV song is selected and broadcasting system, the network system that it has automatic optic disk cabinet and is connected to PC in each box, and the user utilizes this PC to select the KTV song of its desired broadcast;

(b) multiplex's device, it will include with being used to rotate at least, and this automatic K TV song is selected and a plurality of video-audio signals source of broadcasting system is connected to the playback terminal point, and this multiplex's device includes:

Be used to detect selection of this automatic K TV song and broadcasting system and whether be standby for the device of playing; And the interchange box that is connected in this automatic K TV song selection and broadcasting system and terminal box, it includes:

Circuit is selected in the video-audio signal source, its be used to detect this automatic K TV song is selected and broadcasting system standby can be for playing, if certainly, then this automatic K TV song is selected and broadcasting system be connected to this terminal box.

Images