KR20050060433A - Optical disc control apparatus - Google Patents

Abstract

Disclosed is an optical disc control apparatus mounted on a CD / Compact DVD / Digital Video Disc playback device. The apparatus includes an RF signal processor for amplifying a data signal from an optical pickup; A servo signal processor for controlling tracking and focusing of the motor and the optical pickup according to a control signal from the outside; A data signal processor from the RF signal processor; And an on-chip micom for controlling the servo signal processor and the data signal processor according to at least one basic command input from an external device, wherein the RF signal processor, the servo signal processor, the data signal processor, And the on-chip micom is formed on a single chip.

Description

Optical Disc Control Apparatus {Optical Disc Control Apparatus}

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc reproducing apparatus, and more particularly, to an optical disc control apparatus mounted on a reproducing apparatus for a CD (Compact Disc) / DVD (Digital Video Disc).

1 is a block diagram showing a conventional optical disc reproducing apparatus.

Referring to FIG. 1, the optical disk reproducing apparatus includes a motor driver 23, an optical pickup 22, a control IC 30, and a microcomputer 40 for driving a driving motor (not shown) of the optical disk 21. , And the external device 50.

The control IC 30 typically includes an RF amplifier 31, a servo signal processor 32, a data signal processor (DSP) 33, a user signal generator 34, and an interface 35. do. The RF amplifier 31 amplifies the signal detected by the optical pickup 22. The servo signal processor 32 controls the motor driver 23 according to a control signal from the microcomputer 40, and controls tracking and focusing of the optical pickup 22 under the control of the microcomputer 40. do. The digital signal processor (DSP) 33 processes the amplified signal from the RF amplifier 22 to perform EFM signal demodulation, phase locked loop (PLL), error check and error detection.

On the other hand, the continuous digital audio / video signal output from the DSP 33 is provided to the external device 50 and processed by the external device 50. The interface unit 35 provides a command signal from the microcomputer 40 to the processing unit.

The microcomputer 40 includes programs for controlling the servo, data control, and the external device 50 of the control IC 30, for example, a user interface control, a command scheduler, and the like. The control IC 30 is controlled according to a command input through 50).

In addition, the external device 50 includes an audio amplifier, a graphic equalizer, a keypad, an MP3 DSP, a USB driver, a compact flash driver, and the like. The external device 50 processes and outputs data from the control IC 30, and outputs a control state to the outside by the microcomputer 40.

However, in the conventional optical disc reproducing apparatus having the above-described configuration, in order for the developer to control the control IC 30, a detailed command is inputted to the microcomputer 40 to drive the inside of the IC under the control of the microcomputer 40, and Since the control elements must be directly controlled, a developer without much experience and knowledge about the control IC and the internal device of the device requires a lot of time and effort to directly control the device, and thus uses the conventional control IC 30 described above. There was a problem that the development period is delayed in developing the product. In addition, there is a problem in that the optical disc reproducing apparatus requires a microcomputer 40 of a certain performance or higher to increase the price of the product.

Accordingly, the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an optical disk control apparatus that can easily control an optical disk reproducing apparatus even for developers who do not have high knowledge in optical disk control. To provide.

Another object of the present invention is to provide a single-chip optical disc control apparatus that enables the use of less expensive micom in an optical disc reproducing apparatus.

An optical disk control apparatus according to the present invention for achieving the above object comprises an RF signal processor for amplifying a data signal from the optical pickup; A servo signal processor for controlling tracking and focusing of the motor and the optical pickup according to a control signal from the outside; A data signal processor from the RF signal processor; And an on-chip micom for controlling the servo signal processor and the data signal processor according to at least one basic command input from an external device, wherein the RF signal processor, the servo signal processor, the data signal processor, And the on-chip micom is formed on a single chip.

Preferably, the basic command includes an initialization command, and the on-chip micom initializes the servo signal processing unit and the data signal processing unit when the initialization command is input. In addition, the basic command includes a stop command, and the on-chip microcomputer stops the drive of the disc when the stop command is input, moves the pickup bundle around the periphery, and starts the start command as the basic command. When the start command is input, the on-chip microcomputer stops the drive of the moving disk around the pickup bundle, determines the type of the disk by moving the pickup bundle around the periphery, and automatically moves up / down the pickup lens. The servo signal processor controls the servo signal processor so as to read data by performing focus and track servo.

The basic command may include a search command, and when the search command is input, the on-chip microcomputer controls the data signal processor to prepare for reading of data in an externally required format. . When the read command is input, the basic command controls the data signal processor to read data in a format required by an external device. The basic command also includes a pause command. When the pause command is input, the on-chip micom checks the current control state, waits until another command is input, and when the status command is input, the on-chip micom is in the current disk state. Check and print it out. The basic command includes a speed setting command, and the on-chip microcomputer sets the speed according to the speed setting command when the speed setting command is input, and when the volume up / down command is input as the basic command. And controlling the output volume of the audio signal according to the command.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing an optical disk reproducing apparatus to which the optical disk control device 60 according to the embodiment of the present invention is applied.

In FIG. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In Fig. 2, reference numeral 60 denotes an optical disc control device 60 according to the present invention. A user signal output unit 64, an RF signal processor 61 for amplifying the data signal from the optical pickup 22, a motor in accordance with a control signal from the outside, a servo signal for controlling tracking and focusing of the optical pickup. On-chip microcomputer for controlling the servo signal processor and the data signal processor according to the processor 62, the data signal processor 63 from the RF signal processor, and at least one basic command input from the outside ( 67). In addition, preferably, the RF signal processor 61, the servo signal processor 62, the data signal processor 63, the user signal output unit 64, and the on-chip micom 67 are a single unit. It is formed on the chip.

The on-chip microcomputer 67 is the RF signal processor 61, the servo signal processor 62, the data signal processor 63, and the user signal according to a simple control command from an external microcomputer 70. Each of the output units 64 is controlled. When the on-chip microcomputer 67 receives a basic command from the external microcomputer 70 through an interface 66, the on-chip microcomputer 67 controls the processing units according to the basic command.

The on-chip micom 67 preferably processes at least one or more basic instructions and has program data for basic instruction processing and servo data control. Preferably, the basic command supported by the on-chip microcomputer 61 includes an initialization command, a stop command, a start command, a search command, a read command, a pause command, a status command, a speed setting command, and a volume up command. Include at least one of the / down commands.

When the on-chip micom 61 receives an initialization command from the external microcomputer 70, the on-chip micom 61 receives the RF signal processor 61, the servo signal processor 62, and the data signal processor 63 according to the initialization command. ), The user signal output unit 64 is initialized.

When the stop command is input from the microcomputer 70, the on-chip microcomputer 67 stops the drive of the disk according to the command, and moves the pickup bundle around the inner circumference.

When the start command is input from the microcomputer 70, the on-chip microcomputer 67 stops the drive of the moving disk around the pickup bundle according to the starting command, and moves the pickup bundle around the disk to move the inner space of the disk. The type is determined, the pick-up lens is moved up and down, automatic adjustment is performed, and the servo signal processor 62 is controlled so that data can be read by executing focus and track servo.

When the search command is input from the microcomputer 70, the on-chip microcomputer 67 controls the data signal processor 63 to prepare data for reading in a format externally required according to the search command. do.

When the read command is input from the microcomputer 70, the on-chip microcomputer 67 controls the data signal processor 63 to read data in a format required by an external device according to the read command.

When the pause command is input from the micom 70, the on-chip micom 67 checks the current control state according to the command and waits until another command is input.

When the status command is input from the microcomputer 70, the on-chip microcomputer 67 checks the current disk status according to the status command and outputs the result to the outside.

When the speed setting command is input from the microcomputer 70, the on-chip microcomputer 67 sets the speed according to the speed setting command.

When the volume up / down command is input from the micom 70, the on-chip microcomputer 67 controls the output volume of the audio signal according to the volume up / down command.

Therefore, according to the above configuration, by making on-chip the microcomputer for processing commands frequently used in the control IC, the microcomputer used for external mounting can be used as a cheap microcomputer, and the development period of the optical disk reproducing apparatus can be shortened. It becomes possible.

Although the present invention has been described in detail by the above embodiments, the present invention is not limited thereto, and variations and improvements can be made without departing from the ordinary knowledge of those skilled in the art. For example, the entire external microcomputer may be mounted on the control IC so that a certain portion of the code may be used in the same operation as the present invention.

1 is a block diagram showing a conventional optical disc reproducing apparatus.

2 is a block diagram showing an optical disk reproducing apparatus to which the optical disk control apparatus according to the embodiment of the present invention is applied.

Claims (10)

An RF signal processor for amplifying the data signal from the optical pickup; A servo signal processor for controlling tracking and focusing of the motor and the optical pickup according to a control signal from the outside; A data signal processor from the RF signal processor; And An on-chip micom for controlling the servo signal processor and the data signal processor according to at least one basic command input from the outside; And the RF signal processor, the servo signal processor, the data signal processor, and the on-chip microcomputer are formed on a single chip. The method of claim 1, wherein the basic command comprises an initialization command, And the on-chip microcomputer initializes the servo signal processor and the data signal processor when the initialization command is input. The method of claim 1, wherein the basic command includes a stop command, And the on-chip micom stops the drive of the disc when the stop command is input, and moves the pickup bundle around its inner circumference. The method of claim 1, wherein the basic command includes a start command, When the start command is input, the on-chip microcomputer stops driving of the moving disk around the pickup bundle, moves the pickup bundle around the inner disk to determine the type of the disk, and adjusts the pickup lens up / down for automatic adjustment. And controlling the servo signal processor to read data by executing focus and track servo. The method of claim 1, wherein the basic command comprises a search command, And the on-chip microcomputer controls the data signal processor to prepare for reading data in a format required from the outside when the search command is input. The method of claim 1, wherein the basic command includes a read command, And the on-chip microcomputer controls the data signal processor to read data in a format required by an external device when the read command is input. The method of claim 1, wherein the basic command includes a pause command, The on-chip micom checks the current control state when the pause command is input, and waits until another command is input. The method of claim 1, wherein the basic command includes a status command, And the on-chip micom outputs a confirmation of the current disk status when the status command is input. The method of claim 1, wherein the basic command includes a speed setting command. And the on-chip microcomputer sets the speed according to the speed setting command when the speed setting command is input. The method of claim 1, wherein the basic command includes a volume up / down command, And the on-chip microcomputer controls the output volume of the audio signal according to the command when the volume up / down command is input.