JPH09231729A - Optical disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optical disk reproducer which continuously reproduces a plurality of tracks by linking the plurality tracks previously specified by a fade-out or fade-in processing from those recorded in an optical disk. SOLUTION: In reproducing operation, a signal recorded in a track of an optical disk (MD) 1 is read out by an optical pickup 4 to be outputted to a specified processing circuit. A fade-out/-in operation is assigned for continuous reproduction form an operating section 22 to direct that a track N is reproduced next to a track M. As a result, the track N to be linked during the reproduction of the track M among tracks recorded in the MD1 is searched to read a data at a head part thereof and the data obtained is stored by a fade-in data processing. The fade-in data are overlapped from the start to end of the fading out of the track M and an outputting is started to obtain a reproduction output of the track N being linked to the track M. Contents specified by the operating section 22 are shown on a display section 19.

Description

Detailed Description of the Invention

[0001]

[0001] The present invention relates to an optical disk reproducing apparatus.

[0002]

2. Description of the Related Art When reproducing data recorded at a high density on an optical disc or the like, when the track numbers such as tracks M and N are designated for continuous reproduction, the next track N is searched and reproduced after the reproduction of the track M is completed. I used to do it.

[0003]

In the conventional apparatus, when the reproduction of a track is completed, the tracks are reproduced to the next designated track in order by following the control procedure. Therefore, a plurality of tracks recorded on the optical disk are recorded. Since it takes a long time to complete the search of the designated track, there has been a problem in removing the waiting time for creating a silent portion which is preset between the search time and the track when performing continuous reproduction. Therefore, an object of the present invention is to provide an apparatus capable of reproducing the next track in an overlapping manner when the reproduction of a certain track is completed.

[0004]

According to the present invention, there is provided a means for reproducing a first track recorded on an optical disk, a means for designating reproduction of a second track to be reproduced next, and a first track for reproducing the first track. Means for starting and ending fade-out before the end of reproduction, means for reading the head of the second track from the optical disc during reproduction of the first track, performing fade-in data processing and storing, and starting fade-out It is an optical disk device having means for overlapping and outputting the fade-in data from the end to the end.

Further, according to the present invention, the means for reproducing the first track recorded on the optical disk, the means for designating the reproduction of the second track to be reproduced next, and the reproduction of the first track are completed. A means for starting and ending the fade-out before, and reading the head of the second track from the optical disc during the reproduction of the first track, temporarily storing it, and then performing the fade-in process to make the temporarily stored data the fade-in data. The optical disk device includes means for updating and means for outputting the fade-in data in a superimposed manner from the start to the end of the fade-out to start the reproduction of the second track.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described. FIG.
FIG. 3 is a block diagram of an optical disk device according to this embodiment.
An operation of reproducing a mini disc (MD) as an optical disc will be described. The MD 1 of the optical disc is rotatably accommodated in the cartridge 1A, and is loaded onto the turntable 2B of the player 2 by loading the cartridge 1A into the optical disc device. Cartridge 1
In A, MD1 is fixed on the turntable 2B at the center and is rotationally driven by the spindle motor 2A.

A shutter provided on the lower side of the cartridge 1A is opened, and the optical pickup 4 is slid in the axial direction of MD1 by a slide motor 18 to perform a recording / reproducing operation of a signal on a predetermined track of MD1.

When recording, the magnetic head drive circuit 17 switches the magnetic head 16 so as to generate a magnetic field of the NS pole corresponding to the recording signal, and the signal is recorded.

A recording input signal is input from the input terminal 14 or a digital audio tape recorder (DAT) or a compact disc (CD) player 21 and converted into a digital signal by an analog-digital converter (ADC) 11.
An ATRAC (Adaptive Transform Acoustic Coding) modulation / demodulation circuit 10 compresses a digital signal on a time axis and temporarily stores it in a storage circuit 9 as a buffer memory via an anti-vibration memory controller 8, and an EFM (Eight to Fourteen).
Modulation) / ACIRC (Adaptive Cross Interleave)
A read-solomon code) modulation / demodulation circuit 7 modulates a recording signal suitable for the recording format, and the recording signal is sent to the magnetic head 16 via the magnetic head drive circuit 17 and is controlled by the system controller 15 to be controlled by the head amplifier 5
Playback or recording output is supplied to the optical pickup 4 via the. The magnetic head 10, the optical pickup 4, and the spindle motor 2A are controlled via the servo control circuit 3 to record on a predetermined track.

The reproducing operation will be described. A signal recorded on a predetermined track of the MD 1 is converted into an electric signal by the optical pickup 4 and amplified by the head amplifier 5. The rotation control of the MD 1 and the tracking servo control of the optical pickup 4 are performed by the system controller 15 via the servo control circuit 3.

The reproduced signal amplified by the head amplifier 5 is demodulated by the EFM / ACIRC modulation / demodulation circuit 7 through the address recorder 6 and temporarily stored in the storage circuit 9 of the buffer memory through the vibration-proof memory controller 8.

The signal temporarily stored in the storage circuit 9 is sent by the system controller 15 to the ATRAC modulation / demodulation circuit 10 via the anti-vibration memory controller 8 and is demodulated by the demodulation circuit into a time-axis expanded signal, which is digital analog. It is converted into an analog signal by the converter (DAC) 12 and output from the output terminal 13.

Display unit 1 provided on the panel unit of the MD device
On the screen 9, the contents for operating the system controller 15 by operating the key switches of the operation unit 22 are displayed. The reproduction operation when the fade-out / fade-in operation is designated from the operation unit 22 will be described with reference to the level characteristic diagram of FIG. 2 and the flowchart of FIG.

In the MD, time-axis-compressed data is recorded for each track. When the track N is designated next to the normal track M from the operation unit 22 and reproduced, the signal of each track is recorded on the disc of the MD 1 as shown in FIG. The conditions are recorded without change.

From the operation unit 22, M tracks (M songs), then N
If you instruct to continuously play a track (N songs),
As shown in (b), after the track M is reproduced, the search time S is required, and then the reproduction of the track N is started. M songs and N
Normal reproduction is performed with a certain time interval so as to provide an inter-musical portion where the music is not connected and reproduced.

Next, when a fade-out / fade-in operation is designated from the operation section 22 for continuous reproduction and an instruction is given to reproduce the track N after the track M, the system controller instructs the display section 19 from the operation section 22. When the confirmation operation is performed, it is checked whether or not the continuous reproduction is performed, and the reproduction operation is started (S1).

If continuous playback is not specified (S
The normal reproduction of 20) is performed and the reproduction is performed until the end of the reproduction track (S21). When the continuous playback is designated and the next playback track is designated from the operation unit 22, the system controller 15 displays the designated track on the display unit 19 and displays the continuous playback by a character display or the like. indicate
(S3). If the next reproduction track is not designated, reproduction is performed until the end of the reproduction track (S21).

While the reproduction track M is being reproduced, the TOC of the next specified reproduction track N is reproduced, and reproduction preparation is started in advance (S4). A predetermined amount of data from the reproduction start point P1 of the track N to P2 is temporarily stored in a part 9'of the storage circuit 9 of the buffer memory (S).
5). The data from P1 to P2 stored in the storage circuit is multiplied by the fade-in coefficient based on the coefficient table stored in the storage unit 15 ′ as control information designated by the operation unit 22 in the system controller 15 and then the result is shown in FIG. The data of the heads of the N tracks is processed through the vibration-proof memory controller 8 so that the level shown in (1) is increased, and the data from P1 to P2 previously stored in the storage circuit 9'is updated (S
6).

The system controller 15 detects near the end of reproduction of the track M with a time code and determines whether it is the fade-out start point P3 (S7). From the fade-out start point P3 to the end point P4 of the track M, the system controller 15 pre-specifies the fade-out characteristic as shown in FIG. It is stored in the storage circuit 9 after being multiplied by the fade-out coefficient that has been applied, and is time-axis expanded by the ATRAC modulation / demodulation circuit 10 via the anti-vibration memory controller 8, converted into an analog signal by the DAC 12, and a reproduction signal is output from the output short 13. (S8).

The operation unit 2 is provided between the fade-out start point P3 and the end point P4 according to the time information during reproduction of the track M.
A predetermined time (from P3 to P1) from 2 is counted by the system controller 15, and the information P1 to P2 at the head of the track N is ATRAC-modulated / demodulated from the memory circuit 9'through the vibration-proof memory controller 8. Circuit 10
2D, the rising portions P1 and P2 of the head of the track N and the falling portions P3 and P4 of the end of the track M are alternately read from the memory circuits 9'and 9 and mixed as shown in FIG. (S10). ATRAC modulation / demodulation circuit 1
The digital signal whose time axis is expanded at 0 is converted into an analog signal by the digital-analog converter (DAC) 12 and output from the output terminal 13.

The system controller 15 can continuously reproduce the tracks by designating the operation from a plurality of tracks on which continuous signals such as audio signals time-compressed by digital signal processing are recorded. During playback, the head of the next playback track is fade-in data processed and stored, so that a linked playback output can be obtained (S11). Further, the connected reproduction output can be recorded on a new track of the MD being reproduced.

[0022]

According to the present invention, it is possible to obtain an optical disk reproducing apparatus for connecting a plurality of tracks designated in advance and continuously reproducing the tracks.

[Brief description of drawings]

FIG. 1 is a block diagram of an optical disk device according to the present invention.

FIG. 2 is a diagram for explaining data connection.

FIG. 3 is a flowchart of an optical disk device according to the present invention.

[Explanation of reference symbols] 1 MD 1A cartridge 2 player 2A spindle motor 2B turntable 3 servo control circuit 4 optical pickup 5 head amplifier 6 address recorder 7 EFM / ACIRC modulation / demodulation circuit 8 anti-vibration memory controller 9 storage circuit 10 ATRAC modulation / Demodulation circuit 11 ADC 12 DAC 13 output end 14 input end 15 system controller 15 'storage unit 16 magnetic head 17 magnetic head drive circuit 18 slide motor 19 display unit 20 DAT 21 CD player 22 operation unit

Claims (2)

[Claims] 1. A means for reproducing a first track recorded on an optical disk, a means for designating a reproduction of a second track to be reproduced next, and a fade-out before reproduction of the first track is completed. Means for starting and ending, means for reading the head of the second track from the optical disk during reproduction of the first track, performing fade-in data processing and storing the head, and storing means for starting and ending the fade-out. An optical disk device comprising means for overlapping and outputting fade-in data. 2. A means for reproducing a first track recorded on an optical disk, a means for specifying reproduction of a second track to be reproduced next, and a fade-out before reproduction of the first track is completed. Means for starting and ending, and reading the head of the second track from the optical disk during reproduction of the first track, temporarily storing it, and then performing fade-in processing to update the temporarily stored data as fade-in data. An optical disk device comprising: a means for performing the fade-out and a means for outputting the fade-in data in a superimposed manner from the start to the end of the fade-out to start the reproduction of the second track.