JPS62172586A - Digital audio disk reproducing device - Google Patents

Abstract

PURPOSE:To attain excellent re-recording by giving a command of setting a reverse music number when the cumulated playing time reaches >=1/2 of the recordable time and reversing the running direction of a tape just before the start of reproduction of the reverse music number. CONSTITUTION:When a re-recording start command is given, a controller 17 writes the cumulative playing time and a music number (i), reads the playing time ti recorded on a disk 2 and displays (20) the cumulated time added with the time ti and data of the music number (i). Then the presence of a music number sent command is detected, and when present, 1 is added to the music number (i), subsequent re-processings are applied, and when absent, the presence of the reverse music number setting commanded when the cumulated time reaches 1/2 of the recordable time is detected and when it is absent, subsequent re-processings are applied and when present, the music number (i) is displayed (20) as the data of the reverse music number ir. As soon as the reproducing operation of the disk is started, the recording start command is sent, and when the taken-in reproduced music number and the data of the music number (i) are coincident, a signal representing the end of the reproduction up to the music number (i-1) is sent to command the reversing.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a digital audio disc reproducing apparatus, and more particularly to an apparatus for reproducing recorded information on a digital audio disc called a compact disc.

A-1 of a conventional digital audio A1 disc playback device (hereinafter referred to as a player) is used to play back songs recorded on a digital audio disc called a non-bact disc and re-record it on a magnetic tape. If the audio output is supplied to, for example, an auto-reverse cassette deck, it will be loaded into the A-triverse cassette deck, and the
When the number of remaining parts on the side becomes zero, the running direction of the tape is reversed and recording is performed on the 8th side while the player continues to play. Then, the A that was played during the tape reversing operation
- Since the audio signal is not recorded, when a song recorded on a tape is played back by a re-recording operation, a portion of the song is erased, causing discomfort. For this reason, the user should check in advance the songs that can be recorded on side A based on the length of the tape and the performance time of the recorded songs, and when the playback of the songs that can be recorded on side Δ is completed, the user can manually control the running direction of the tape. The conventional device has a problem in that it requires complicated operations.

1. An object of the present invention is to provide a digital audio disc playback device that can perform good re-recording with simple operations.

The digital audio disc playback device according to the present invention sequentially accumulates the playback time of each of a plurality of information groups each time a command is issued, and at the same time, data indicating the accumulation result and data indicating the accumulated information group. is displayed, and a detection signal is generated by detecting the end of reproduction of the information group corresponding to the data displayed on the display means among the plurality of information groups.

衷-JLJL Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a player unit that reproduces recorded information on a digital audio disc. play 17
In section 1, recorded information on a digital audio disc 2 which is rotationally driven by a spindle motor 3 is read by an optical pickup 4. The pickup 4 includes a laser diode, an objective lens, a focus actuator, a tracking actuator, a photodetector, and the like. The output of the pickup 4 is sent to the focus servo circuit 5. Tracking servo circuit 6
and a phase comparison circuit 9 including an RF amplifier, a focus error is generated in the focus servo circuit 5, and a focus actuator in the pickup is driven in accordance with this error ffi. The tracking servo circuit 6 generates a tracking error, and this error component is sent to the tracking actuator in the pickup and the pickup feed servo circuit 7. The pickup 4 is sent in the radial direction of the disk 2 by the output of the pickup feed servo circuit 7.

The phase difference between the reproduced clock signal obtained by the phase comparison circuit 9 and the reference clock signal from the clock generation circuit 13 is detected in the spindle servo circuit 8, and the spindle is adjusted so that the track linear velocity of the recording disk 2 is constant. Motor 3 is driven.

The output of the phase comparison circuit 9 is an EFM including a frame synchronization circuit.
(Eight to, l”ourteen
Modulation) is supplied to the demodulation circuit 10, and the demodulated output is used for deinterleaving of the demodulated data signal 5 for error detection and correction.

The data is processed by a data processing circuit 11 that performs correction and the like.

Thereafter, the data is temporarily stored in the data memory 12, read out by a clock signal of a constant period from the clock generation port 2813, and sent to the D/A (digital/analog) converter 14 to become an analog signal.

The output of this D/A converter 14 is supplied to the deck section 21 via an LPF (low pass filter) 16 as left and right audio signals.

On the other hand, the control signal in the data from the demodulation circuit 10 is supplied to the system controller 17, and
Various information such as song number, audio mute, and playing time can be loaded. This system controller 17 is composed of one or more microcomputers, and the system controller 17 is composed of one or more microcomputers.
Data is supplied to the display 20 and the mechanism control circuit 23 according to the control signal output from the mechanism control circuit 23 of the pickup feed servo circuit 7.1. Spindle servo circuit 8. It supplies various commands to the D/A converter 14. Note that 18 is a RAM (random access memory) that stores information from the system controller 17.

In the deck section 21, the audio signal output from the player section 1 passes through a recording amplifier 24, is biased by an oscillation circuit 25, and is simultaneously supplied to a recording head within a mechanism section 22.

In the microcomputer constituting the system controller 17 in the above configuration, a processor that operates according to a program stored in advance in a ROM (read-only memory) performs the following processing.

In other words, when the user issues a re-recording start command by operating a key on the operation unit 19 during execution of the main routine, the processor stores 0.1 as data indicating the cumulative performance time T and the song rii, respectively, in a predetermined value in the RAM. (81 in FIG. 2).Next, the processor reads the performance time ti of the first song from among the various information recorded in the lead-in area of the disc 2 (82 in FIG. 2).Next, the processor reads Cumulative performance time T1 stored in a specified location in RAM: Add the read performance time ti (
Figure 2 33). Next, the processor supplies data indicating the cumulative ViPy4 playing time T and the song number i stored in a predetermined location in the RAM to the display 20 (FIG. 2, 84). Next, the processor detects whether or not a song number change command has been issued by the user's key operation on the operation unit 19. When it is detected that a song number change command has been issued, the processor 1 is added to the song number i stored in the predetermined location (86 in FIG. 2), and the processing from step S3 onwards is performed again. When it is detected in step S5 that a song number forwarding command has not been issued, the processor detects whether or not a reverse song number setting command has been issued by the user's key operation on the operation unit 19 (see FIG. 2, 87). ), when it is detected that the reverse song number setting command has not been issued, the processing from step S5 onwards is performed again. Step S
When it is detected in step 7 that a reverse song number setting command has been issued, the processor supplies data indicating the song number i stored in a predetermined location of the RAM to the display 20 as data indicating the reverse song number ir. Figure 2 88). Next, the processor starts the reproduction operation of the music recorded in the program area of the disc 2, and at the same time sends a recording start command to the control circuit 23 of the deck section 21 (FIG. 2, 89). Next, the processor takes in data indicating the song number of the song being played from among the information in the program area, and reads it.
Compared with the data indicating the song number i stored in the predetermined location of AM (810 in FIG. 2), the song number 1 (i-1) is reached because the song number obtained from the program area matches the song number 1. Detects the completion of the reproduction and sends a detection signal to the control circuit 23 of the deck section 21 as a reversal command.
11) Execute the main routine again.

In the above-mentioned apparatus, if a track number forwarding command is generated by operating the track number forwarding command switch SW1 on the operating section 19 as shown in FIG. The cumulative playing time T up to the song number i when played in sequence is displayed on the display 2.The cumulative playing time T displayed on the display 2 is part 2 of the recordable time of the tape. Operation section 1 by the above Togi user
If the reverse track number setting command is generated by operating the reverse track number setting switch SW2 at step 9, the running direction of the tape will be reversed immediately before the start of playback of the track number set as the reverse track number ir. Become. As a result, the head is prevented from reaching the end of one of the two recording surfaces of the tape in the middle of the song, resulting in good re-recording.

FIG. 4 is a flow diagram showing another example of the operation of the apparatus shown in FIG. In this example, in steps 81 to S10, the same processing as in the flow of FIG. 2 is performed, so step 8
11 onwards will be explained.

In step S10, when the song number obtained from the program program \7 matches the song number 1, the processor
After the unit 1 is put into the pause state, the control circuit 2 of the deck unit 21
Send a fast forward command to 3 (Fig. 4 811.Sl 2)
. Next, when the processor detects that the head has reached the starting edge of one of the two recording surfaces of the tape by the output of the control circuit 23 of the deck section 21, it sends a recording start command to the control circuit 23, and the player section 1 is released from the pause state (813.14 in Figure 4).

In the above embodiment, the reversal command is issued based on the comparison result of the song numbers, but the reversal command may be issued based on the comparison result of time information. Further, in the above embodiment, the display unit 20 was provided with a separate display section for displaying only the reverse song number, but the display section for the reverse song number can also be used in common with the display section for the song number i.

Effects of Bonmei As detailed above, the digital audio disc playback device U according to the present invention sequentially accumulates the playback time u1 of each of a plurality of information groups every time a command is issued, and at the same time collects data and information indicating the accumulation results. It is configured to display data indicating a cumulatively processed information group, and to generate a detection signal by detecting the end of reproduction of the information group corresponding to the displayed data among multiple information groups.・The user can easily detect the number of songs recorded on an audio disc that can be recorded on one of the two recording sections of the tape, and can easily determine the running direction of the tape after the detected number of songs has been played back. Since it can be reversed, good re-recording can be performed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flow diagram showing an example of the operation of the device shown in FIG. 1, and FIG. 3 shows the operating section 19 and FIG. 4, which shows the display 20, is a flowchart showing another example of the operation of the device shown in FIG. Explanation of symbols of main parts 17...System controller 20...
·display

Claims (1)

[Claims] A digital audio disc playback device that plays back information recorded on a digital audio disc in which a plurality of information groups and time information indicating a playback time required for playing each of the plurality of information groups are recorded, an accumulating means for sequentially accumulating the reproduction time of each of the plurality of information groups in a predetermined order every time a command is issued; and the reproduction time is accumulated by the output data of the accumulating means and the accumulating means. display means for displaying data indicating a group of information displayed on the display means; and detection means for detecting the end of reproduction of an information group corresponding to the data displayed on the display means among the plurality of information groups and generating a detection signal. A digital
Audio disc playback device.