JP2764220B2 - Audio disk / memory disk combined disk player - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disc player, and more particularly to an audio disc / memory disc disc player that can read both an audio disc and a memory disc.

BACKGROUND ART In-vehicle disc players that play digital audio discs (hereinafter simply referred to as audio discs) called CDs (compact discs) include:
When the loading operation of the disc is completed, the various servo systems are started up to enable the performance, and then, for example, it is determined whether or not the disc to be played this time is the same as the previous one. The performance is started from the last address, and if different, the performance is started from the first music.

By the way, in recent years, a display is mounted as one of the in-vehicle devices, while map data is stored in a so-called CD-ROM, and the necessary map data of the map is read from the CD-ROM and supplied to the display as a display information signal. By doing so, a so-called navigation system has been developed in which a map is displayed on a display so that the current position of the vehicle can be confirmed. CD-ROMs (hereinafter referred to as memory disks) used as storage media for this map data
It has the same signal format as CD. For this reason, it is conceivable to read recorded information from an audio disk and a memory disk by a single disk player.

When reading a memory disk, the player, when receiving a read command of map data of a required (that is, designated) map from a system controller that controls the entire navigation system, reads the map data of the designated address in response to the command. Need to move to operation. Therefore, if the dual-purpose disc player immediately starts reading from the first map data or the last address as in the case of the audio disc when the loading operation of the memory disc is completed, a read command is issued from the system controller. The pickup position may change during this time, and it may take a long time for the player to search for the start address of the necessary map data after receiving the read command. become.

SUMMARY OF THE INVENTION [Object of the Invention] Accordingly, the present invention provides an audio disk / memory disk combined disk player capable of quickly searching for a designated address when a disk to be played or read / played is a memory disk. The purpose is to:

[Constitution of the Invention] An audio disk / memory disk combined disk player according to the present invention is an audio disk / memory disk combined disk player capable of reading both an audio disk and a memory disk, and reads information from a mounted disk. Means, a discriminating means for discriminating whether the loaded disc is an audio disc or a memory disc based on the information from the reading means, and when the disc is discriminated as an audio disc, reading of music is started from a predetermined position. Control means for controlling the operation to shift to a pause mode when the memory disk is used.

[Operation of the Invention] In the audio / memory disk dual-purpose disk player according to the present invention, when reading / reproducing a disk, it is first determined whether the disk to be read is an audio disk or a memory disk. Transition.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, an audio disk / memory disk dual-purpose disk player 1 is inserted into a disk (hereinafter, referred to as a slot) (not shown) formed in a front surface of a housing, for example.
Audio disk and memory disk)
2 is a so-called slot-in type player. In the disc player 1, the disc 2 inserted from the slot is loaded by the loading mechanism 3, mounted on the turntable 4, and driven to rotate by the spindle motor 5. Information recorded on the disk 2 is read by the optical pickup 6. The pickup 6 is mounted on a slider (not shown) that moves in the radial direction of the disk 1 using the slider motor 7 as a drive source.

In the case of a CD format signal, the output signal of the pickup 6 is an EFM (Eight to Fourteen Modulation) signal, and the read EFM signal passes through an RF amplifier 8 and an EFM demodulation circuit 9.
After being subjected to EFM demodulation, the signal is supplied to the sub-code decoder 10, the error is corrected by the error correction circuit 11, and the D / A
The signal is converted into an analog signal by the converter 12 and output as a reproduced audio signal. The subcode decoder 10 decodes subcode information inserted in frame units, that is, code information such as a song number, an index, a time and a frame number in a song, and an absolute time and a frame number in a disc. Is performed, and the decoded data is supplied to the player controller 13. The lead-in area of the disc 2 has a TOC containing disc identification information indicating whether the disc is an audio disc (CD) or a memory disc (CD-ROM).
Index information called (Table Of Contents) is recorded, and this TOC information is also decoded by the subcode decoder 10.

The player controller 13 is constituted by a microcomputer, and controls the driving of the loading mechanism 3 by the control of the processor, the position control of the pickup 6 in the disk radial direction by the driving of the slider motor 7 via the slider driving circuit 14, the spindle driving. In addition to controlling the drive of the spindle motor 5 via the circuit 15 and mounting the disk based on the disk identification information in the TOC information obtained by reading from the lead-in area and decoding by the subcode decoder 10 when reading the disk. It also determines whether the read disk, that is, the disk currently being read is an audio disk or a memory disk.

The demodulated output of the EFM demodulation circuit 9 is also supplied to a CD-ROM decoder 16. The CD-ROM decoder 16 reads from the memory disk (CD-ROM) and
The map data obtained by demodulation is decoded and sent to a bus line BL composed of, for example, an optical fiber.

The system controller 17 is composed of a microcomputer and controls the entire navigation system. A player controller 13 and a CD-ROM decoder 16 are connected to the system controller 17 via a bus line BL, respectively, so that information can be exchanged with the controller 17. The bus line BL is further connected to an operation unit 18 for issuing various commands by a key input by the user and an image display controller 20 for controlling an image display such as a map on a display unit 19 such as a liquid crystal display. .

Next, a processing procedure at the time of reading a disc executed by the processor of the player controller 13 will be described with reference to the flowchart of FIG. When the user inserts the disk 2 into the slot on the front of the housing for reading the disk, a disk insertion detection switch (not shown) for detecting the insertion of the disk 2 is operated. It is called and executed when a disk insertion is detected by the disk insertion detection switch or when a start-up command from the system controller 17 is received.

The processor of the player controller 13 first determines whether a start-up command has been received from the system controller 17 or whether disk insertion has been detected by the disk insertion detection switch (steps S1 and S2). Of the loading mechanism 3 to load the data on the turntable 4 (step S
3) After that, it waits until a loading completion signal is issued from a loading completion detection switch (not shown) (step S4).

When the loading completion signal is issued, the processor performs the pull-in control of the focus servo (step
S5) If the pull-in is OK (step S6), the spindle motor 5 is accelerated to perform the pull-in control of the spindle servo (step S7), and further, the pull-in control of the tracking servo is performed (step S8). The pull-in control of these various servo systems is performed according to a well-known procedure. If it is determined in step S1 that a command has been received, the flow directly proceeds to step S5 to perform pull-in control of various servo systems. Steps S1 to S8 serve as a start-up means for issuing a read start command for the mounted disc when the series of processes is completed.

When the pull-in control of various servo systems is completed, the processor starts reading the TOC information recorded in the lead-in area (step S9), and subsequently determines whether or not the reading is OK (step S10). If the reading OK determination is not made even after the predetermined time has elapsed (step S11),
For example, the drive of the loading mechanism 3 is controlled to eject the disk assuming that the disk is abnormal (step S12). If it is determined in step S6 that the retraction of the focus servo is NG, the process directly proceeds to step S12 to eject the disk. Although the disc is ejected when the focus servo pull-in or the reading of the TOC information is NG, the operation of the player may be stopped instead of the ejection.

If it is determined in step S10 that the reading of the TOC information is OK, the processor determines whether the mounted disk is an audio disk or a memory disk based on the disk identification information in the TOC information (step S13). If it is determined that the disk is an audio disk (CD), it is determined whether the loaded disk is a newly loaded disk (step
S14) If the disc is a newly loaded disc, the slider drive circuit 14 is driven and controlled based on the address information obtained from the subcode decoder 10 to achieve 1
The head address of the tune is searched (step S15), and if the disc has already been read, the last address of the previously read end is searched (step S16). When the search operation is completed (step S17), play is continued. Transition to mode. When reading the disc,
The address information obtained from the sub-code decoder 10 is stored in the internal memory, and is sequentially updated as the reading progresses. The finally stored address information becomes the last address.

On the other hand, in step S13, the memory disk (CD-RO
If it is determined to be M), the mode is shifted to the pause mode as it is, and a standby state for a read command from the system controller 23 is set. In this pause mode, when a read command (search / playback command) for map data of a required or designated map is issued from the system controller 17, the processor of the player controller 13 sends map data corresponding to the designated map. Searches the specified address to read from the memory disk, reads the data from the memory disk and supplies the map data obtained by decoding with the CD-ROM decoder 16 to the image display controller 20 to display the specified map on the display 19 To control. Steps S9 to S11 and S13 serve as determination means, and steps S13 to S17 serve as mode switching means.

Effects of the Invention As described above, in the audio disk / memory disk dual-purpose disk player according to the present invention,
When reading a disk, it is first determined whether the disk to be read or reproduced is an audio disk or a memory disk. If the disk is a memory disk, the system immediately shifts to the pause mode and waits for a read command from the system controller, thereby reading the read command. Is issued, the search can be moved quickly to the specified address.
Desired data can be quickly read from the memory disk. Further, since the reading of the audio disc is performed immediately after disc discrimination without going through the pause mode, the sound of the disc mounted by the user for listening can be output immediately, which may impair the operability of the audio disc. Absent.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an audio disk / memory disk dual-purpose disk player according to the present invention, and FIG. 2 is a flowchart showing a processing procedure at the time of playing a disk executed by a processor of a player controller. Description of Signs of Main Parts 1... Disc player for audio disk and memory disk 3... Loading mechanism 6... Pickup 9... EFM demodulation circuit 10... Subcode decoder 13. 17 System controller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Sato 25-1, Nishimachi, Yamada-ji, Kawaji-shi, Saitama Prefecture Inside the Pioneer Corporation Kawagoe Plant (72) Inventor Kiyoshi Furukawa 25-1, Nishi-machi, Yamada-ji, Kawagoe-shi, Saitama Pioneer Inside the Kawagoe Plant Co., Ltd. (72) Inventor Kenji Kaneko 25-1 Nishimachi, Yamada-shi, Kawagoe City, Saitama Prefecture Pioneer Co., Ltd.Kawagoe Plant Joint Referee Mikio Kawana Referee Hiroshi Inukai Referee Yoshio Imai Referee JP Hei 3-91179 (JP, A)

Claims (3)

(57) [Claims] 1. An audio disk / memory disk dual-purpose disk player capable of reading both an audio disk and a memory disk, comprising: reading means for reading information from a mounted disk; and mounting based on information from the reading means. Discriminating means for discriminating whether the disc is an audio disc or a memory disc, and controlling to start reading music from a predetermined position when the disc is an audio disc,
An audio disk / memory disk dual-purpose disk player comprising control means for controlling a transition to a pause mode when the disk is a memory disk. 2. A disc player for both an audio disc and a memory disc according to claim 1, wherein discrimination of the loaded disc is performed based on read information of a lead-in area of the disc. 3. The audio / memory disk / disk player according to claim 1, wherein the recording information at a specified address is read in response to a search / reproduction command after the transition to the pause mode.