JPH02116073A - Audio equipment - Google Patents

Abstract

PURPOSE:To prevent the disturbance of reception of a tuner and at the same time to reproduce a compact disk player in a short period of time by stopping the clocks which are oscillated by an optical disk player at application of the tuner and also storing the automatic control data into a memory. CONSTITUTION:When an operator switches an optical disk player to a tuner, a system controller 12 outputs the stand-by signals to a data processor 6 and a servo processor 13. Thus the processor 6 stops the system clocks oscillated internally by the stand-by signal. While the processor 13 switches an internal memory 15 to a stand-by state. Thus the reception of the tuner is never disturbed and an optical disk can be immediately reproduced in case the tuner is switched to an optical disk player.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an audio device in which a tuner for receiving radio broadcasts and the like and an optical disk player used for playing music etc. are integrated or combined.

"Prior Art" FIG. 2 is a block diagram showing an example of the configuration of a conventional vehicle-mounted compact disc player (hereinafter simply referred to as a CD player). In this figure, l is a compact disc (
CD), 2 is a spindle motor that rotationally drives the CDI,
3 is an optical pickup that uses a laser beam to read digital information recorded by pits on the signal recording surface of the CDI; 4 is a feed motor that moves this 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 also amplifies and outputs this read signal, and 6 is an RF amplifier that outputs the signal. A data processor performs processing such as signal demodulation, code error correction, and correction; 7 is a crystal oscillator used to oscillate a system clock in the data processor 6; 8 is a crystal oscillator used to store data processed in the data processor 6; 5-RAM.

Further, 9 is a DA converter that converts the digital signal output from the data processor 6 into an analog audio signal, 10 is an audio circuit that performs processing such as amplification and sound quality control on this audio signal, and the output of this audio circuit 10 The signal is output to an external speaker or the like via the audio output terminal 11. ! 2 is a system controller, which includes a CPU (central processing unit) and an RO in which programs used in this CPU are stored.
It consists of M and l10 (input/output) ports. 13, under the control of the system controller 12, the RF
Focus adjustment control (focus servo) and tracking adjustment control (tracking servo) of the optical pickup 3 and feed adjustment control (feed servo) of the feed motor 4 are performed using the focus error signal, tracking error signal, etc. output from the amplifier 5. These are servo processors that perform constant linear speed control (spindle servo) of the spindle motor 2. Further, in the servo processor 13, 14 is a gain offset controller used to automatically adjust the gain and offset of the transfer characteristics of the focus servo and tracking servo among the transfer characteristics of the four servo systems described above, and this automatic adjustment is performed every time the CDI is replaced. Reference numeral 15 denotes a gs-RAM in which data after automatically adjusting the gains and offsets 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 this CD player.

In such a configuration, when this CD player is installed in a car together with a tuner, a cassette deck, etc., the system clock is kept oscillating in the data processor 6 in this CD player while the passenger is using the tuner. Then, this system clock interferes with tuner reception via the power line, ground line, etc. Therefore, while the passenger is using the tuner,
The oscillation of the system clock oscillating in the data processor 6 is stopped by transmitting a control signal from the system controller 12 in the CD player to the power supply circuit 16 and turning off all power to the CD player.

``Problems to be Solved by the Invention'' By the way, in the conventional CD player mentioned above, the system clock oscillation stops while the tuner is operating, so there is no reception interference to the tuner, but the overall system of the CD player Since the power was turned off, there was a drawback that the automatic adjustment data for the gain and offset of the focus servo and tracking servo stored in the SRAM+5 in the servo processor I3 would be erased.

Therefore, when a passenger switches from a tuner to a CD player, the servo processor 13 automatically adjusts the focus servo and tracking servo before playing the CDI, so it takes time for audio to be output. There was a problem.

This invention was made in view of the above-mentioned circumstances, and does not interfere with reception of the tuner when using the tuner.
It is an object of the present invention to provide an audio device that can shift a D player from a stopped state to a playing state in a short time.

``Means for Solving the Problems'' The present invention includes a disk player and a tuner, each of which is equipped with a memory in which automatic adjustment data of the gain and offset of the transfer characteristics of a focus servo and a tracking servo are stored. An audio device used by switching between various electronic devices, characterized by comprising a control circuit that stops oscillation of a clock oscillated in an optical disc player when a tuner is used, and causes automatic adjustment data stored in the memory to be held in the memory. There is.

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

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a CD player used in audio equipment according to an embodiment of the present invention. In this diagram, parts corresponding to those in FIG. The explanation will be omitted. The difference between the CD player shown in this figure and the one in FIG. 2 is that instead of the control signal being output from the system controller 12 to the power supply circuit 16, a standby signal is sent from the system controller 12 to the data processor 6 and servo processor 13. This is the point that is being output. This standby signal is output from the system controller 12 to the data processor 6 and servo processor 13 when the operator switches from the CD player to the tuner, and the data processor 6 stops the oscillation of the internal system clock. At the same time, current consumption is switched to the minimum state. On the other hand, the servo processor 13 switches the internal 5-RAM 15 to a standby state based on this standby signal, and also switches the current consumption to a minimum state.

In order to use this CD player with such a configuration, first, the power lines of each of these devices are connected to the battery wire of the automobile, together with the tuner, etc., and each of these devices is attached to a dash board or the like.

Next, assume that the passenger attaches the CDI to 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 to automatically adjust 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 tracking servo, and then stores the data of this automatic adjustment in the 5-RAM 15.

The system controller 12 then plays CDl.

Next, assume that the passenger switches from the CD player to the tuner. As a result, the system controller 12 outputs a standby signal to the data processor 6 and servo processor 13. In response to this standby signal, the data processor 6 stops the oscillation of the internally oscillated system clock and switches the current consumption to the minimum state. On the other hand, in response to this standby signal, the servo processor 13 switches the internal 5-RAM 15 to a standby state, and switches the current consumption to a minimum state. Therefore, since the system clock is not oscillated within the CD player, tuner reception is not disturbed.

Then, assume 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 in the servo processor 13
Automatic adjustment data of the gain and offset of the transfer characteristics of the focus servo and tracking servo are already stored in I5. Therefore, the CDI is immediately played back and the audio is output from the speaker.

In this way, unless the CDI is replaced, there is no need for the servo processor 13 to automatically adjust the gain and offset of the transfer characteristics of the focus servo and tracking servo each time the operator switches from the tuner to the CD player. It can be activated immediately and the burden on the system controller 12 can be reduced.

The embodiment described above is a CD player for normal music playback, but the present invention also applies to CD-ROMs, CD-Vs (
The invention can also be applied to playback devices such as Compact Disc Video) and CD-1 (Compact Disc Interacitive Media).

Furthermore, the present invention is applicable not only to optical disc players but also to other audio equipment that oscillates a system clock and adversely affects the tuner.

Note that the audio equipment mentioned above is an example of being installed in a car.
This audio equipment may be a stationary type system component stereo or a portable type cassette recorder with a radio.

In addition, in the embodiment described above, the system clock in the CD player is stopped and the standby signal output is controlled by the CD player.
System controller inside the player! 2, an independent controller may perform this operation.

"Effects of the Invention" As explained 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 by the tuner is not interfered with. The effect is that the transition from the stop state to the play state can be made in a short time.

[Brief explanation of the drawing]

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

Claims (1)

[Claims] An audio device comprising an optical disc player having a memory in which automatic adjustment data for gain and offset of transfer characteristics of a focus servo and a tracking servo are stored, and a tuner, and using each of these electronic devices by switching, wherein the tuner is used. An audio device comprising a control circuit that sometimes stops oscillation of a clock oscillated in the optical disc player and causes the memory to hold the automatic adjustment data stored in the memory.