JPH0636529Y2 - AV system - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an AV system, particularly a CDV player and an AV system.
An AV that includes an amplifier and whose input selector circuit of the AV amplifier is automatically switched by the PLAY signal sent from the CDV player.
Regarding the system.

[Conventional technology]

In an AV system, connect multiple source devices related to video and audio such as VCR, CDV player, tuner, etc. to the AV amplifier, select one input source for audio and video with this AV amplifier, and amplify the audio signal. After that, the signal is output to an external speaker, and the video signal is directly output to the monitor television.

The AV amplifier is provided with an input source designation key, and when a user designates a certain source, switching control between the video selector circuit and the audio selector circuit is performed.

Further, since the input source is automatically switched in synchronization with the PLAY of the source device, when the source device is set to the PLAY state, the PLAY signal is transmitted from this source device to the AV amplifier.

When a PLAY signal is input from a certain source device, the AV amplifier side switches the video selector circuit and the audio selector circuit to the corresponding positions.

[Problems to be solved by the device]

However, in the above-mentioned conventional technology, the AV amplifier performs the synchronous switching of the video and the audio by being biased by the PLAY signal from the CDV player without distinguishing between the CD disc and the CDV disc.
Even when a CD disc is set, the video selector circuit
Since it was switched to the CDV position, I could not watch other images such as video while listening to the CD sound, and I had no choice but to see the noise screen unless the monitor TV was turned off.

The present invention has been made in view of the drawbacks of the prior art. A CDV player is a PLA with a CD disc set.
The purpose is an AV system that allows you to enjoy other video sources when asked.

[Means for Solving the Problems]

This invention has a CDV player that outputs a PLAY signal at the start of PLAY, and an AV amplifier that inputs a video signal and an audio signal from the outside including the CDV player and selectively outputs them. The amplifier selectively outputs one of the video signals of two or more systems by selectively selecting and outputting one of the video signals and one of the audio signals of two or more systems. In an AV system provided with audio switching means and switching control means for controlling switching of the video switching means and the audio switching means to corresponding positions based on an input designating signal from the input designating means or a PLAY signal from the outside, a CDV The player has a disc discriminating means for discriminating whether the disc is a CD or a CDV and outputting a discriminating signal to the AV amplifier. The switching control means of the AV amp receives the PLAY signal from the CDV player and disc discriminating means. When the separate signal is CD, only the audio switching means is switched to the CDV position, and when the disc discrimination signal is CDV, both the video switching means and the audio switching means are switched to the CDV position.

In another AV system according to the present invention, a CD is installed in the AV amplifier.
The video signal detection means for detecting the presence or absence of the video signal from the V player is provided, and the switching control means, when the PLAY signal is input from the CDV player, when the video signal detection means does not detect the video signal, only the audio switching means is the CDV position. When the video signal detection means detects the video signal, both the video switching means and the audio switching means are switched to the CDV position.

〔Example〕

 One embodiment of this invention will be described with reference to FIG.

FIG. 1 is a block diagram showing an AV system according to the present invention.

The AV amplifier 10 has four audio signal input terminals (AUX, video, CD
V, tuner) voice selector circuit 12 is connected,
According to the switching control, one audio signal is selectively selected and output.

An audio unit 14 is connected to the output side of the voice selector circuit 12, and performs volume control and power amplification on a voice signal according to the rotation of a volume knob (not shown).

The output side of the audio section 14 is connected to the speaker 16 via the speaker output terminal.

A video selector circuit 18 is connected to the three video signal input terminals (AUX, video, CDV), and selectively selects and outputs one video signal in accordance with switching control.

The output side of the video selector circuit 18 is connected to the monitor television 20 via the television output terminal.

A microcomputer 22 is connected to the control input sides of the audio selector circuit 12 and the video selector circuit 18.

An operation unit 24 and three control terminals are connected to the microcomputer 22.

The operation unit 24 is provided with four input source designation keys of AUX, video, CDV, and tuner in addition to the power key, and outputs a key signal according to the user's operation.

The microcomputer 22 includes a CPU, a ROM, and a RAM, which are connected to a bus, and controls power on / off and source switching control according to a user's key operation based on a predetermined program stored in the ROM.

The microcomputer 22 also performs source switching control according to a PLAY signal input from an external source device via the control terminal, and outputs a power on / off signal and a STOP signal to the source device.

The RAM of the microcomputer 22 is provided with a storage area for AS and VS data for managing the audio position and the video position.

The audio signal input terminal of the AV amplifier 10 has an AUX (not shown),
Audio signal output terminals of the video deck 26, the CDV player 30, and the tuner 34 are connected.

In addition, the video signal input terminal of the AV amplifier 10 is connected to the AUX (not shown), the video signal output terminals of the video deck 26 and the CDV player 30, and the video terminal is connected to the control terminal.
26, the control terminals of the CDV player 30 and the tuner 34 are connected.

The video deck 26 has a microcomputer 28, and performs PLAY control, STOP control, fast forward / fast rewind control, etc. according to key operations provided on the deck, based on a predetermined program stored in the ROM.

The microcomputer 28 is an AV amplifier through the control line.
It is connected to a microcomputer 22 of 10 and outputs a PLAY signal to the AV amplifier 10 side when PLAY starts.

Also, when the power on / off signal and the STOP signal are input from the AV amplifier 10 side, the power on / off control of the deck is performed, respectively.
Perform STOP control.

The CDV player 30 has a microcomputer 32 connected to the microcomputer 22 of the AV amplifier 10 via a control line, and performs the same control as a VCR according to a predetermined program stored in the ROM, and a disc. It discriminates whether the disc is a CD or a CDV by referring to the TOC read from, and at the start of PLAY, the disc discrimination signal is also output to the AV amplifier 10 side in association with the output of the PLAY signal.

The tuner 34 has a microcomputer 36, and performs variable control of the reception state according to the key operation provided on the tuner 34, and power on / off control according to the power on / off signal input from the AV amplifier 10. To do.

Next, the operation of the above embodiment will be described with reference to the flow charts of FIGS.

2 and 3 show a microcomputer 22, FIG. 4 shows a microcomputer 28, and FIG. 5 shows a microcomputer.
It is a flow chart concerning 32.

It is assumed that the power supplies of all the devices have been turned off in advance, and that neither the VCR 26 nor the CDV player 30 has a cassette or disc inserted therein.

When the power of the AV amplifier 10 is turned on, the microcomputer
22 supplies power to each part of the amplifier (step 4
0, 42), power on signal is output to each source device (step 44), AS = TUNER, VS = VIDEO, audio position control is performed based on AS, video position control is performed based on VS, and audio selector circuit 12 is the tuner position, and the video selector circuit 18 is the video position (steps 46-52).

VCR 26, CDV player 3 with power on signal input
0, the microcomputers 28, 32, 36 of the tuner 34 supply power to the respective parts of the set (steps 150, 152, fourth
See figure. (See steps 200 and 202, FIG. 5).

The tuner 24 reproduces the last receiving state when the power is turned on,
The received broadcast signal is output to the AV amplifier 10.

The received broadcast signal passes through the audio selector circuit 12 and is subjected to volume adjustment and power amplification in the audio section 14 and then the speaker 16
To be output as sound.

Since the VCR 26 is not in the PLAY state yet and is not outputting the video image signal, there is no signal output from the image selector circuit 18. Here, when the power of the monitor TV 20 is turned on, a noise screen is displayed.

When the user turns on the CDV key of the operation unit 24 of the AV amplifier 10 to enjoy the CDV player 30, the microcomputer 22
Sets both AS and VS to CDV, and controls the position of the audio and video based on these to set both the audio selector circuit 12 and the video selector circuit 18 to the CDV position (steps 54 to 7).
Four).

The CDV player 30 is not in the PLAY state yet, and neither the audio signal nor the video signal is output from the AV amplifier 10.

In this state, when the user inserts the CDV disc into the CDV player 30, the microcomputer 32 loads it and then temporarily puts it in the PLAY state, reads the TOC information and stores it in the RAM (steps 204 to 210).

Next, when the user turns on the PLAY key, the microcomputer 32 outputs a PLAY signal to the AV amplifier 10, and at this time also refers to the TOC information and also outputs a disc discriminating signal indicating whether the disc is a CD or a CDV (step 212). , 214).

In this case, the disc discrimination signal indicates CDV.

Then, each part of the player is controlled to start PLAY (step 216).

As a result, the CD audio signal is output, and the video signal of a fixed color and the PL
At AY, the video signal of the picture recorded on the disc is output.

On the AV amplifier 10 side, when the microcomputer 22 inputs the PLAY signal, the type of the source device is identified from the position of the input control terminal. In this case, since it is the CDV player 30, the content of the disc identification signal input together with the PLAY signal. It is determined whether the disc is a CD or a CDV (steps 76 to 80).

Since it is CDV here, it is determined whether AS and VS are CDV. In this case, since it is already CDV, only the STOP signal is output to the video deck 26 (steps 82, 88, 94).

However, the VCR 26 is in a stopped state in advance, and the state does not change.

The CD audio signal output from the CDV player 30 is output to the speaker 16 via the audio selector circuit 12 and the audio unit 14, and is acoustically output.

The video signal output from the CDV player 30 is sent to the monitor television 20 via the video selector circuit 18 and the image is reproduced.

This allows you to enjoy CD music and see the picture on the disc when PLAY enters the video area.

If the user turns on the tuner key of the operation unit 24 of the AV amplifier 10 in order to listen to the radio while playing the CDV player 30, the microcomputer 22 sets AS = TUNER, and this AS
Based on the above, the audio position switching control is performed to bring the audio selector circuit 12 to the tuner position (steps 54 to 60,
96-102).

Then, since the tuner 34 is already in operation, a radio broadcast can be heard from the speaker.

Since the video selector circuit 18 remains CDV, the CDV player 30
CDV player 30 on monitor TV 20 as long as is playing
The video screen related to is continuously displayed.

From this state, when the user inserts a video cassette to turn on the VCR 26 and turns on the PLAY key this time, the microcomputer 28 of the VCR 26 loads the video cassette and then outputs a PLAY signal to the AV amplifier 10 for PLAY.
Is started (steps 154-164).

As a result, the video audio signal and the video image signal are output from the video deck 26.

On the other hand, the microcomputer 22 of the AV amplifier 10 which has input the PLAY signal, after confirming that it is the PLAY of the video deck 26, switches both AS and VS to VIDEO and performs position switching control based on these data. , CD
Output a STOP signal to the V player 30 (steps 76, 78, 1
04-118).

Since both the audio selector circuit 12 and the video selector circuit 18 are in the video position, the audio of the video cassette is output from the speaker 16 and the video screen is displayed on the monitor TV 20.

However, in the CDV player 30, the microcomputer 32 that receives the STOP signal stops the PLAY operation (step 21
8, 220).

While watching the video screen while playing VCR 26
If you want to enjoy CD music, turn on the eject key of the CDV player 30 without turning on the CDV key of the AV amplifier 10.
Eject the disc (steps 222, 224) and replace it with the CD
Insert the disc and turn on the PLAY key.

Then, in the CDV player 26, after loading the disc in the same manner as described above, the CD disc is played and the CD audio signal is output (steps 206 to 212, 216).

At the start of PLAY, a PLAY signal is output, and at the same time, a disc identification signal indicating that the disc is a CD is output (step 214).

The microcomputer 22 of the AV amplifier 10 sends the CD from the PLAY signal.
It is confirmed that the V player 30 has started PLAY, and whether the disc is a CD or a CDV is discriminated from the disc discrimination signal (steps 76 to 80).

In this case, since it is a CD, it is judged whether or not only AS is CDV,
Since it is NO here, it is rewritten to CDV and then the audio position switching control is performed based on this AS (steps 120 to 1).
twenty four).

As a result, the audio selector circuit 12 is set to the CDV position, and the CDV
The CD audio signal input from the player 30 is output to the speaker 16 via the audio unit 14.

At this time, the video selector circuit 18 remains in the video position, and if the video deck 26 is not at the tape end but in PLAY, the video video signal is output to the monitor television 20.

Therefore, since the video screen is continuously displayed on the monitor TV 20, the user can enjoy the CD music and the video screen together.

On the contrary, when the PLAY key of the player is turned on again with the CDV disc set in the CDV player 30, the disc discrimination signal output together with the PLAY signal indicates CDV (step 212). , 214).

At this time, the microcomputer 22 of the AV amplifier 10
And VS are both switched to CDV, and the audio and video positions are switched and controlled by these data.
20 changes to a screen related to CDV (steps 76 to 92).

At this time, the microcomputer 22 to the VCR 26
However, since the STOP signal is output, the video PLAY operation is stopped on the VCR 26 side (steps 94, 166, 16).
8).

According to this embodiment, when the PLAY key of the CDV player 30 is turned on, the disc discrimination signal is output to the AV amplifier 10 together with the PLAY signal.
When the Y signal is input, when the disc is CDV, both audio and video are switched to the CDV position to output the audio and video related to the CDV disc, and when the disc is CD, only the audio CD
By switching to the V position and outputting the audio related to the CD, and continuously displaying the screen related to other sources such as the VCR 26, you can enjoy the images related to other sources while listening to the CD music. You can avoid seeing the noise screen.

In the above embodiment, the disc discrimination signal is output from the CDV player 30 together with the PLAY signal at the start of PLAY, and the audio disc and the video position are switched by referring to the disc discrimination signal on the AV amplifier side. However, the present invention is not limited to this, and a P
Only the LAY signal is output. Instead, a video signal detection circuit is provided at the CDV video signal input terminal in the AV amplifier (see 38 in Fig. 1), and the output side of this video signal detection circuit is connected to the microcomputer of the AV amplifier. Then, when the PLAY signal is input from the CDV player, the output of the video signal detection circuit is checked.When the video signal is detected, the CDV disc is set in the CDV player, and when it is not detected, the CDV disc is detected.
It may be determined that the disc is set and the position switching control similar to that described above may be performed.

According to this, since it is only necessary to change the configuration of the AV amplifier, and the conventional CDV player can be used, the burden on the user can be reduced.

[Effect of device]

In the AV system according to the present invention, the CDV player has a disc discriminating means for discriminating whether the disc is a CD or a CDV and outputting a discriminating signal to the AV amplifier, and the switching control means of the AV amp receives the PLAY signal from the CDV player. When input, when the disc discrimination signal is CD, only the audio switching means is switched to the CDV position, and when the disc discrimination signal is CDV, both the video switching means and the audio switching means are switched to the CDV position. While playing the CD disc and listening to the CD music, you can enjoy the screens of other video sources at the same time, and you can avoid seeing the noise screen while listening to the CD music.

Also, in other AV systems according to this invention,
The video signal detection means for detecting the presence or absence of the video signal from the CDV player is provided, and the switching control means receives the PLAY signal from the CDV player, and when the video signal detection means does not detect the video signal, only the audio switching means is the CDV position. , And when the video signal detection means detects a video signal, both the video switching means and the audio switching means are switched to the CDV position, so that
If you have a system, you don't have to replace the CDV player.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an AV system according to an embodiment of the present invention, and FIGS. 2 to 5 are flow charts showing the operation of the microcomputer of FIG. 10: AV amplifier, 12: Audio selector circuit, 16: Speaker, 18: Video selector circuit, 20: Monitor TV, 22,28, 32, 36: Microcomputer, 24: Control unit, 26: VCR, 30: CDV Player, 34: Tuner.

Claims (2)

[Scope of utility model registration request] 1. A CDV player that outputs a PLAY signal at the start of PLAY, and an AV amplifier that inputs a video signal and an audio signal from the outside including the CDV player, and selectively selects and outputs them. The AV amplifier is a video switching means for selectively selecting and outputting one of the video signals of two or more systems, and one of the audio signals of two or more systems being selectively selected and output. In the AV system, the audio switching means and the switching control means for controlling the switching of the video switching means and the audio switching means to the corresponding positions based on the input designating signal from the input designating means or the PLAY signal from the outside, The CDV player has a disc discriminating means for discriminating whether the disc is a CD or a CDV and outputting a discriminating signal to the AV amplifier. The AV amplifier switching control means discriminates the disc when the PLAY signal is inputted from the CDV player. When the signal is CD, only the audio switching means is switched to the CDV position, and when the disc discrimination signal is CDV, both the video switching means and the audio switching means are switched to the CDV position. 2. A CDV player for outputting a PLAY signal at the start of PLAY, and an AV amplifier for inputting a video signal and an audio signal from the outside including the CDV player, and selectively selecting and outputting them. The AV amplifier is a video switching means for selectively selecting and outputting one of the video signals of two or more systems, and one of the audio signals of two or more systems being selectively selected and output. In the AV system, the audio switching means and the switching control means for controlling the switching of the video switching means and the audio switching means to the corresponding positions based on the input designating signal from the input designating means or the PLAY signal from the outside, The AV amplifier is provided with video signal detection means for detecting the presence or absence of a video signal from the CDV player, and the switching control means does not detect the video signal when the PLAY signal is input from the CDV player. Huang switched to only CDV position audio switching means, AV system characterized by, that to switch to both CDV position video switching means and the audio switching means when the video signal detection unit detects a video signal.