JPH0456382B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for controlling a plurality of digital disk players.

BACKGROUND TECHNOLOGY AND PROBLEMS Conventionally, when controlling the operations of multiple CD players that play back so-called CDs (compact discs) on which digitized audio signals such as music are recorded, A control device is connected to each of the players so that each player can be controlled independently. As a result, the overall system configuration becomes complicated, operations become complicated and erroneous operations are likely to occur, and a large space is required.

OBJECTS OF THE INVENTION The present invention provides a control device that commonly controls a plurality of CD players.

Summary of the Invention The present invention is configured such that a plurality of digital disc players are connected, and includes a first selection means for selecting at least two players from among the plurality of players; a second selection means for further selecting one player from among the players selected by the first selection means; a cueing means for cuing up the one player selected by the first selection means; a reproduction means for putting the player into a reproduction mode; a monitor means for outputting a reproduction signal obtained by cue selection or a reproduction signal obtained by the reproduction mode according to the operation of the cueing means or the reproduction means; means for switching the monitoring means, and when the one player is in the playback mode, the second selection means can select the other player, and the other player is in a selected state. The control device for a digital disk player is characterized in that when the switching means is operated, the monitoring means monitors a reproduction signal of the player in the reproduction mode. This makes it possible to control the cueing and playback of a plurality of digital disc players and the monitors during cueing and playback using a common device.

Example In this example, n CD players are connected to the control device, any two of them are selected, one of them is set to playback operation, and the other is set to cue operation. I have to. Such a function is used, for example, in a music program at a broadcasting station, when two players are used and one of the players is being played while the other is being cued.

Furthermore, in this embodiment, it is possible to program in advance the beginning of the songs to be played on the discs set in each of the n CD players and the order in which each player plays them.

FIG. 1 shows the operation panel surface 2 of the control device 1. As shown in FIG.

The front side surface of the control device 1 is provided with a headphone connection section 3 for monitoring a reproduced signal, a monitor sound volume adjustment knob 4, a power switch 5, and the like. Further, a power cord 6 is connected to the connection side of the control device 1, and connection portions 7 ₁ , 7 ₂ . . . 7 _o-1 , 7n to which n CD players are connected are provided.

Next, with the players numbered 1 to n connected to the connection parts 7 ₁ to 7n, when selecting and controlling two of the players, various operations arranged on the operation panel surface 2 will be explained. Explain the button operation procedure.

First, the first player set button 9 is pressed to select two players numbered 1 to n, and then the player select button 8 is pressed. Next, select one of the desired player numbers using the numeric keypad 11. As a result, the player with that number is called and becomes controllable. At this time, the player number is displayed on the display section 12, and if a disc is set in the player, the display lamp 16 is lit. Next, after pressing the second player set button 10, the player select button 8 is pressed, and then another desired player number is selected using the numeric keypad 11. As a result, the player with that number is called and becomes connectable. At this time, the display section 13 displays the player number, and if a disc is set in the player, the display lamp 19 lights up.

As described above, two players are selected. These two players can be used at any time except during playback.
Select button 8, set buttons 9, 10 and numeric keypad 1
1 to change to another player. In the following explanation, a case will be described in which the first player and the second player are selected and they are not changed.

When the selection of the two players is completed, in order to cue up one of the players, the set button 9 or 10 is pressed to set the first or second player and bring it into a controllable state. Incidentally, when the above-mentioned selection of the two players is completed, the display section 13 and the display lamp 19 are lit, indicating that the second player has been set. Next, for example 2
With the player set, the user uses the numeric keypad 11 to specify the number of the song on the disc.
This brings the pick-up to the beginning of the specified song. At this time, the disk is rotating, and the beginning of the song that was cued is played repeatedly. Therefore, by listening to the reproduced sound through the headphone, it can be determined that the cue has been found.

If the cue position is to be more accurately determined, after the above-mentioned cue position is performed using the numeric keypad 11, the manual button 24 is pressed, and then the knob 25 is turned. This allows the cue position to be adjusted in units of one frame on the disk. Therefore, for example, it is possible to cue to the position immediately before the actual sound of a song. Incidentally, in a compact disc, a frame signal is recorded in which one second of the signal recorded on a track is made up of 75 frames.

If the user wants to cue a song in the middle of a song specified using the numeric keypad 11, the user presses the index button 26 and then uses the numeric keypad 11 to specify an index number corresponding to the desired cueing position of the specified song. On a compact disc, 99 index numbers are assigned from the beginning to the end of a song, and the content corresponding to each number is displayed on the jacket, so you can easily find the index at the desired cue position of the song. You can know the number. When an index number is specified, the pick-up moves to that position. In this case, the manual button 24 and the knob 25 can be used to perform more fine adjustment of the cue position. It should be noted that the push button 27 is a button for advancing the number of a song specified by the numeric keypad 11 by one, and the push button 28 is a button for returning the number of the song specified by the numeric keypad by one.

After confirming through the headphone that cueing has been completed as described above, by pressing the standby button 22, the second player enters the standby state with cueing completed, and this state is indicated by the indicator lamp 18. is displayed.

If you want to reconfirm the cue position in this standby state, press the monitor button 23 and the specified song will be played from the cued portion. When the user presses the standby button 22 again after confirming the reproduced sound sufficiently through the headphone, the reproduction is stopped and the pickup returns to the cue position and enters the standby state.

If the play button 21 is pressed from this state, the second player enters the playback mode, and the playback signal, if it is a broadcast program, is broadcast on the air and monitored by the headphone. At this time, the display lamp 18 goes out and the display lamp 17 lights up, indicating that the program is on air. Further, as the disc is played, the currently played track number, index number, time (minutes, seconds, frames), etc. are displayed on the display sections 29, 30, 31, 32, and 33, respectively. In addition, the display lamp 34 lights up to indicate that the displays on the display sections 29 to 33 are currently playing. Note that the displays on the display sections 29 to 33 are also performed during the above-mentioned cueing operation and pause, and in that case, the display lamp 36 or 37 is lit. If you want to know the remaining time during playback, by pressing the remaining time display button 38, the display lamp 35 lights up and the remaining time is displayed. Further, when the above-mentioned index search is being performed, the display lamp 40 lights up.
Note that by pressing the stop button 20, the above reproduction is stopped.

To cue the first player during playback of the second player, press the player set button 9. As a result, the No. 1 player becomes controllable, and the display section 12 and the display lamp 16 are turned on, and the display sections 29 to 33 are switched to display regarding the No. 1 player, and the display lamp 36 is turned on. Note that at this time, the second player is continuing to play, and the display lamp 17 is lit.

In this state, the first player is cued up in the same manner as described above. If the user wishes to know the status of the second player while performing this cueing, the temporary switching button 39 is pressed. This causes the headphone to become 2
The reproduced sound of the player No. 2 can be monitored, and the display sections 29 to 33 are switched to display regarding the player No. 2. Therefore, the playback status of the second player can be confirmed. Furthermore, by pressing the remaining time display button 38 in this state, it is also possible to know the remaining time of the second player. Next, by operating the temporary switching button 39 again, the
The player whose turn is now in a controllable state, and cueing continues. When cueing is completed, the standby state is established. After the playback of the second player or the announcement etc. is finished, press the play button 2.
Pressing 1 puts player number 1 into playback mode. At this time, the display lamp 15 goes out and the display lamp 14 lights up.

If you want to cue up the second player during this playback, press the player set button 10.
Player No. 2 can be put in a controllable state to cue the player.

The above describes the case where players No. 1 and 2 are used, but if you want to change the player to be used, for example when player No. 2 is in playback mode, press set button 9 and then press select button 8. When the desired player number is pressed using the numeric keypad 11, that player is called up and becomes controllable, and the No. 1 player is disconnected. Therefore, the control device 1 according to this embodiment has n
It is possible to call up several players one after another, cue each player, place them, and then play them one after another.

FIG. 2 shows a schematic circuit system for performing the above-described operations of the control device 1, and parts corresponding to those in FIG. 1 are given the same reference numerals.

The control device 1 is numbered #1 to #n.
CD players are connected via connection sections 7 ₁ to 7n. Each player connects the above connection parts 7 ₁ to 7n
A through the signal transmitting/receiving circuits 41 ₁ to 41n.
It is connected to a channel selector 42 and a B channel selector 43. Note that the A channel refers to the channel related to the player selected with the set button 9, and the B channel refers to the channel related to the player selected with the set button 10.
This refers to the channel related to the player selected in . These selectors 42 and 43 are switched through a control I/O 44. The command interface I/O 45 inputs and outputs various signals transmitted and received to and from the player selected by the selectors 42 and 43. The data for these signals is
It is processed by the CPU 46 and written to or read from the RAM 47. ROM48 has a CPU
Data necessary for 46 calculation processes is stored. The CPU 46 and the command interface I/O 45 are driven by a clock φ obtained from a clock oscillator 49.

The player select button 8, set buttons 9, 10
The signals are obtained from the signals obtained by operating the numeric keypad 11 and the matrix 50 regarding each push button. Signals based on the operations of the push buttons 20 to 24 in FIG. 1 are processed through the input I/O 51 of each push button to form various signals necessary for cueing, playback, display, etc. is sent to the circuit. Among these, signals for display are applied to the display sections 12 and 13 via the display I/O 52, and are also applied to the display circuit 53 for driving the other display sections and display lamps shown in FIG. Note that circuits 85 and 86 relate to programs, which will be described later.

FIG. 3 shows a flowchart based on the circuit configuration of FIG.

According to this flowchart, the player's selection operation described above with reference to FIG. 1 is executed. In FIG. 3, the loop from the step of communicating with the player and checking to ERROR is executed when the player is not connected or the player's state is not normal.

FIG. 4 shows a circuit system related to the above-mentioned temporary switching button 39, and parts corresponding to those in FIGS. 1 and 2 are given the same reference numerals.

As described above, the temporary switching button 39 temporarily switches the playback sound of the player currently playing when the player of one channel is playing and the player of the other channel is being cued. It has a function of monitoring the current status and temporarily switching the display sections 29 to 33 to a display related to the player currently playing.

For this purpose, in the circuit of FIG. 4, the monitor output of the A player (Ach player) and the monitor output of the B player (Bch player) are switched to select the headphone 57 (or speaker). These switches 55, 56 are controlled by transistors 58, 59.

Assume that, for example, the set button 10 has been pressed to cue player B, and player A is being played back. In this state, the signal selection circuit 6
1 sends a select signal for turning on the switch 56 to the transistor 59 through gates 62 and 63.
In addition to This results in this transistor 5
9 becomes conductive and the switch 56 is turned on, so that the monitor output of the B player is applied to the headphone 57. At the same time, the above signal is also applied to the display control circuit 66 from the gate 63, which closes the switch 67 to the B side, and the display data related to the B player supplied from the CPU 46 is added to the display circuit 53. It is being

In this state, when the temporary switching button 39 is operated to monitor the A player, the timing control circuit 60 outputs the drive signal S _D and the erase signal BLK. The signal S _D turns on the switch 55 by making the transistor 58 conductive through the gates 64 and 65. The signal BLK is passed through the gate 63 to the transistor 59.
By making the switch 56 non-conductive, the switch 56 is turned off. As a result of the above, the monitor output of the A player is added to the headphone 57. Also the above signal
S _D and BLK are also applied to the display control circuit 66, and the switch 67 is switched to the A side, thereby applying display data regarding player A to the display circuit 53.

If the remaining time display button 38 is further operated in this state, the switching circuit 68 is switched and the A player control signal is output, and based on this, the display data is switched to the content representing the remaining amount time. Note that the switching circuit 68 receives the signals S _D and BLK.
has been added to display the remaining time of the player in playback mode.

When temporary changeover switch 39 is released, transistors 58 and 59 are inverted, switch 55 is turned off, switch 56 is turned on, and headphone 57 is turned on.
is supplied with the monitor output of player B during cueing.

FIG. 5 shows a flowchart for carrying out the above-described operation regarding the temporary switching button 39 in the circuit configuration of FIG. 4.

Next, a case where the control device 1 performs program playback on the player will be described. By using the program function of the control device 1, any songs on the disks of players A and B can be played back in any order.

In FIG. 1, when programming, the program button 70 is first pressed. This puts the device in program mode, clears the previous program contents stored in the memory, and waits for data input for a new program. At this time, the indicator lamp 82 is lit and the first indicator lamp 74 blinks to indicate that the first song is being programmed. Incidentally, the display lamps 74 to 81 numbered 1 to 8 indicate the program order and performance order of the songs to be programmed, and in this embodiment, eight songs can be programmed.

Next, press set button 9 or 10 to select the player you want to program, then select the desired song on the disc set in that player and cue the beginning of it. This cueing is performed in the same manner as the operation described above. When the cueing is completed and the reconfirmation is completed, the set button 71 is pressed. As a result, the program data is loaded into the memory, and the display lamp 74 changes from blinking to lighting, and furthermore, the second display lamp 75 starts blinking. Next, if the second song to be programmed is on the same disk as the first song, the cue for the second song will be proceeded as is. When the second song is on the disk of the other player, after selecting the player using the set button 9 or 10, the desired song on that disk is selected and its cue is searched. When eight programs are set by repeating the above operations, the control device 1 automatically exits the program mode. If a program with fewer than eight songs is to be programmed, the program mode can be exited by pressing the program button 70 again. At this time, the display lamps 74 to 81 light up for the number of programmed songs, and the display lamp 82 lights up.
disappears.

Next, the operation when executing the program will be explained.

First, after confirming that one or more of the display lamps 74 to 81 is lit, press the start button 7.
Press 2. As a result, the player corresponding to the first song is automatically cued up and placed in a standby state. In addition, the display lamp 83 lights up. Next, set the switch 73 to the AUTO side for automatic performance, and set the switch 73 to the MANUAL side for manual operation. Next, by pressing the play button 21 or the monitor button 23, the player enters the playback mode. and 1
When the song ends, the player for the second song is automatically selected and the beginning of the second song is selected. At this time, if it is the automatic performance, the second song will automatically start, and if it is the manual operation, it will be in a standby state and will start after waiting for the play button 21 or monitor button 23 to be operated. Furthermore, if the user wishes to proceed to the next song during the performance of a song, the player can automatically proceed to the next song by pressing the stop button 20.
When all the steps of the program are completed as described above, the player enters the stop state.

In the circuit of FIG. 2, each of the push buttons 70 to 7 is
A signal resulting from the operation No. 3 is applied from the push button matrix 85 to the push button input I/O 51. The display circuit 86 also includes a display lamp 74 regarding the program.
-83 are displayed.

6 and 7 are flowcharts for executing the operations related to the program described above using the circuit shown in FIG. 2. FIG. 6 is a flowchart related to programming, and FIG. 7 is a flowchart related to program execution. It's a chat.

Effects of the Invention Since cueing and playback of a plurality of players and monitoring during cueing or playback can be performed by one control device, the system configuration is significantly simplified compared to the conventional system. This prevents erroneous operation and allows installation in very narrow spaces. The device of the present invention is particularly suitable and effective for use when, for example, two CD players are used to alternately reproduce music programs from a broadcasting station.

[Brief explanation of drawings]

Figures 1 to 7 show embodiments of the present invention. Figure 1 is a plan view of the operation panel, Figure 2 is a schematic block diagram of the entire circuit, and Figure 3 is a diagram for normal operation. 4 is a circuit block diagram regarding the temporary switching button, FIG. 5 is a flowchart regarding FIG. 4, and FIGS. 6 and 7 are flowcharts regarding program playback. In addition, in the symbols used in the drawings, 1...control device, 3...headphone connection section, ₇₁ to 7n...
...Player connection section, 8...Player selection button,
9, 10... Player set button, 11... Numeric keypad, 21... Play button, 25... Knob, 39...
Temporary switching button, 42...A channel selector,
43...B channel selector, 46...CPU,
47...RAM, 48...ROM.

Claims (1)

[Claims] 1. A first selection means configured to connect a plurality of digital disc players and select at least two players from the plurality of players, and a player selected by the first selection means. a second selection means for selecting one more player from among the players; a cueing means for cueing up the one player selected by the second selection means; and reproducing the cued player. a reproduction means for outputting a reproduction signal obtained by the cueing operation or a reproduction signal obtained by the reproduction mode according to the operation of the cueing means or the reproduction means; and means for switching the monitoring means. and when the one player is in the playback mode, the second selection means can select another player, and when the other player is selected, the switching means 2. A control device for a digital disk player, characterized in that, when operated, the monitor means monitors a reproduction signal of the player in the reproduction mode.