JPH0743916B2 - Audio equipment - Google Patents

Description

The present invention relates to an audio device in which a tuner for receiving radio broadcasts and an optical disk flare used for music reproduction are integrated or combined.

"Prior Art" FIG. 2 is a block diagram showing a configuration sequence of a conventional compact disk player for vehicle (hereinafter, simply referred to as a CD player). In this figure, 1 is a compact disc (C
D), 2 is a spindle motor that drives CD1 to rotate, and 3 is a CD
An optical pickup 4 for reading digital information recorded by pits on the signal recording surface 1 by using a laser beak is a feed motor for moving the optical pickup 3.

Further, 5 is an RF amplifier that generates and outputs a focus error signal and a tracking error signal from the read signal output from the optical pickup 3, and amplifies and outputs the read signal, and 6 is output from the RF amplifier 5. A data processor for performing processing such as signal demodulation, code error correction and correction, 7 is a crystal oscillator used for oscillating a system clock in the data processor 6, and 8 is data stored in the data processor 6. It is an S-RAM.

Furthermore, 9 is a DA converter that converts the digital signal output from the data processor 6 into an analog audio signal, and 10 is an audio circuit that performs processing such as amplification and sound quality control on this audio signal. The signal is output to an external speaker or the like via the audio output terminal 11. A system controller 12 is composed of a CPU (central processing unit), a ROM in which a program used in this CPU is stored, and an I / O (input / output) port. Reference numeral 13 denotes a focus adjustment control (focus servo) and a tracking adjustment control (tracking servo) of the optical pickup 3 using the focus error signal and the tracking error signal output from the RF amplifier 5 under the control of the system controller 12. The servo processor performs feed adjustment control of the feed motor 4 (feed servo) and constant linear velocity control of the spindle motor 2 (spindle servo). Further, in the servo processor 13, reference numeral 14 is a gain-offset controller used for automatically adjusting the gain and offset of the transfer characteristics of the focus servo and the tracking servo among the transfer characteristics of the above-mentioned four servo systems. Is performed every time CD1 is replaced. Reference numeral 15 denotes an S-RAM in which the data after automatic adjustment of the gain and offset of the transfer characteristics of the focus servo and tracking servo described above are stored.

In addition, 16 is a power supply circuit that supplies power to each part of the CD player.

In such a configuration, when this CD player is mounted in a car together with a tuner and a cassette deck,
If the passenger keeps the system clock oscillating in the data processor 6 in the CD player while using the tuner, the system clock interferes with the reception of the tuner through the power supply line and the ground line. . So while the passenger is using the tuner,
From the system controller 12 in the CD player to the power supply circuit 16
By transmitting a controller signal to the CD player and turning off all the power supplies of the CD player, the oscillation of the system clock oscillating in the data processor 6 is stopped.

[Problems to be Solved by the Invention] In the above-described conventional CD player, since the system clock oscillation is stopped during the tuner operation, there is no reception interference to the tuner, but the entire system of the CD player does not interfere. Since the power is turned off, the automatic adjustment data of the gain and offset of the focus servo and tracking servo stored in the S-RAM 15 in the servo processor 13 is lost.

Therefore, when the passenger switches from the tuner to the CD player, CD1 is played after the servo processor 13 automatically adjusts the focus servo and the tracking servo, so it takes time until the sound is output. There was a problem.

The present invention has been made in view of the above circumstances, and does not interfere with the reception of the tuner when the tuner is used,
It is an object of the present invention to provide an audio device capable of shifting a player from a stopped state to a playback state in a short time.

"Means for Solving the Problems" The present invention includes an optical disk player having a memory in which automatic adjustment data of gain and offset of transfer characteristics of focus servo and tracking servo are stored, and a tuner. An audio device that switches between electronic devices is characterized by including a control circuit that stops oscillation of a clock oscillated in an optical disk player when a tuner is used and holds automatic adjustment data stored in the memory in the memory. .

[Operation] According to the present invention, when the operator switches from the optical disk player to the tuner, the clock oscillation of the optical disk player is stopped, so that the reception of the tuner is not disturbed by this clock. Further, when the operator switches from the tuner to the optical disc player, the optical disc can be immediately reproduced.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the structure of a CD player used in an audio device according to an embodiment of the present invention. In this figure, parts corresponding to the respective parts in FIG. The description is omitted. Shown in this figure
The CD player differs from that shown in FIG. 2 in that instead of the control signal output from the system controller 12 to the power supply circuit 16, a standby signal is output from the system controller 12 to the data processor 6 and the servo processor 13. It is a point. This standby signal is output from the system controller 12 to the data processor 6 and the servo processor 13 when the operator switches from the CD player to the tuner, and the data processor 6 stops the oscillation of the system clock internally oscillated. At the same time, the consumption current is switched to the minimum state.
On the other hand, the servo processor 13 switches the internal S-RAM 15 to the standby state by this standby signal and switches the consumption current to the minimum state.

In order to use the CD player with such a configuration, first, the power supply line of each of these devices is connected to the battery wire of the automobile together with the tuner and the like, and each of these devices is attached to the dashboard or the like.

Next, it is assumed that the passenger mounts CD1 in the CD player shown in FIG. 1 and turns on the power. As a result, the system controller 12 in the CD player outputs a command to the servo processor 13 for automatically adjusting the gain and offset of the transfer characteristics of the focus servo and tracking servo. Upon receiving this command, the servo processor 13 automatically adjusts the gain and offset of the transfer characteristics of the focus servo and the tracking servo, and then stores the data of this automatic adjustment in the S-RAM 15.

The system controller 12 then plays CD1.

Next, assume that the passenger switches from a CD player to a tuner. As a result, the system controller 12 outputs a standby signal to the data processor 6 and the servo processor 13. The data processor 6 stops the oscillation of the internally oscillated system clock by the standby signal and switches the consumption current to the minimum state. On the other hand, the servo processor 13 switches the internal S-RAM 15 to the standby state and switches the consumption current to the minimum state by the standby signal.
Therefore, since the system clock is not oscillated in the CD player, the reception of the tuner is not disturbed.

Then, it is assumed that the passenger switches from the tuner to the CD player again. As a result, the system controller 12 in the CD player stops outputting the standby signal. At this time, the S-RAM 15 in the servo processor 13 has already stored the automatic adjustment data of the gain and offset of the transfer characteristics of the focus servo and the tracking servo. Therefore, CD1 is immediately reproduced and the sound is output from the speaker.

Thus, every time the operator switches from the tuner to the CD player, the servo processor is replaced unless the CD1 is replaced.
Since 13 does not need to automatically adjust the gain and offset of the transfer characteristics of the focus servo and tracking servo, the CD player can be started immediately and the load on the system controller 12 can be reduced.

Although the above-described embodiment is a CD player for reproducing normal music, the present invention is applicable to CD-ROM, CD-V (compact disc video), and CD-1 (compact disc.
It can also be applied to a reproducing apparatus such as an interlaced media).

In addition, although the above-mentioned audio device is an example mounted on a vehicle,
The audio device may be a stationary system component stereo or a portable cassette recorder with a radio.

Further, in the above-described embodiment, the system controller 12 in the CD player stops the system clock in the CD player and outputs the standby signal, but an independent control device may perform this operation.

[Advantages of the Invention] As described above, according to the present invention, since the system clock is not oscillated in the optical disc player while the tuner is in use, there is an effect that reception of the tuner is not disturbed. There is an effect that it is possible to shift from the stopped state to the playback state in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted compact disc player used in an audio device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a configuration example of a conventional vehicle-mounted compact disc player. 12 ... System controller, 15 ... S-RAM.

Claims (1)

[Claims] 1. An audio device comprising an optical disk player having a memory for storing gain and offset automatic adjustment data of transfer characteristics of a focus servo and a tracking servo, and a tuner, and switching between these electronic devices. 2. An audio device, comprising: a control circuit for stopping the oscillation of a clock oscillated in the optical disc player when the tuner is used and for holding the automatic adjustment data stored in the memory in the memory.