JPH0753188Y2 - Disk player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a disc player.

[Prior art and its problems]

A conventional CD player (hereinafter simply referred to as "player") that reproduces the signal by mounting a disc (hereinafter referred to as "CD") in which an audio signal converted into a digital signal is stored.
The control microcomputer (hereinafter referred to as "microcomputer") is installed in the disc mounting section (turntable) of the player and detects the disc and detects the disc. Is configured (programmed) to automatically read and store the TOC information recorded at a predetermined position (the innermost portion of the recording band). Here, TOC information is
It is information data such as the number of songs stored on the disc, the total playing time, and the playing start time of each song.
This is used when you want to listen to only the desired songs in the desired order from the stored songs, that is, when you want to reserve a performance, and when the reserved songs are selected, the playing time is added and displayed. Used for services such as doing. Specifically, it operates according to the flowchart of FIG.
The memory contents stored in M are data such as the order of the recorded songs and the playing start time of each song. When recording the playing start time of one song, a 6-byte RAM area is used. Therefore, if the number of songs stored on the disc is large, it requires a large area, and as an extreme example, a disc containing 99 songs requires an area of 594 bytes, which requires a microcomputer with a large RAM capacity. However, there was a drawback that the cost of the microcomputer increased and the price of the CD player also increased.

[Means for solving problems]

The present invention is a disc player having a performance reservation setting means and having a RAM for reading and storing TOC information recorded at a predetermined position of a disc in a control microcomputer, to which a signal is supplied from the performance reservation setting means. Only when the signal detection unit that outputs a detection signal according to the content of the signal and the detection signal from the signal detection unit are input, and only the data specified from the TOC information is read according to the content of the detection signal. And a control unit that stores the performance time of a reserved song specified from the stored data, a calculation result of the calculation unit, and a performance start time of each song stored in the control unit By including a display unit for displaying the information data of
This is a cost reduction.

〔Example〕

An embodiment of the disc player of the present invention will be described with reference to FIG. Figure 1 shows the CD player of the present invention.
It is a system block diagram of 10. In the figure, M ₁ is a disc motor for rotating the turntable, M ₂ is a feed motor for pick-up transfer, A ₁ is a focus actuator, A ₂ is a tracking actuator, A ₃ and A ₄ are motor drive amplifiers, and 11 is a disc. Laser pickup for reading recorded signals, 12 head amplifier, 13 servo processor LSI, 14 data processor L
SI, 15 is a D / A converter, 16 is an LPF (low-pass filter) that removes signal components above the audible frequency band, 17 is an audio output amplifier, 18 is an audio output terminal, and at least the above configuration is conventional. Since the configuration is similar to that of the CD player, detailed description thereof will be omitted. 21 is a RAM that can store TOC information
It is a microcomputer with a built-in
A control unit, a calculation unit, and the like are provided. The signal detection section outputs a detection signal according to the content of the signal only when the signal is supplied from the operation key 19 or the optical remote controller 20 which is the performance reservation setting means, and the control section detects the signal from the signal detection section. The signal is input and the TO is stored in the CD according to the content.
Only specified data is read out from the C information and stored in the RAM built in the microcomputer 21. Also,
The arithmetic unit supplies a signal to the servo processor LSI13 based on the data stored in the RAM, calculates the total playing time of the reserved music and supplies the signal to the display unit 22 (which is composed of an LCD or the like), It has a function of supplying a mute signal to the audio output amplifier 17 in accordance with the output signal from the servo processor LSI13.

The characteristic operation of the disc player of the present invention having such a configuration will be described with reference to the flowchart of FIG. As can be seen from a comparison with FIG. 3, the work of the processes 'to' in the conventional CD player is not performed, and when the disc is loaded, it is detected to enter the performance reservation acceptance state (process). Here, operation keys 19 and optical remote controller 20
When the play button (not shown) is pressed without performing the reserved music selection in step 1, normal reproduction (playing) is performed in the order recorded on the disc. If the user operates the operation keys 19 or the optical remote controller 20 to make a performance reservation, the microcomputer
The signal detection unit in 21 detects the signal and activates the control unit, and based on the detection signal, the control unit only the various information related to the reserved and selected song among all the TOC information recorded on the disc. Is read and stored in the built-in RAM (processing), and the servo processor LSI13 is operated according to a preset program to play and play the reserved music in the reservation order, and at the same time, it is reserved by the performance section in the microcomputer 21. The total playing time of each song is calculated (processing), and the calculation result and information data such as the performance start time of each song are displayed on the display unit 22
To be displayed. Generally, the number of songs reserved by the user is much smaller than the total number of songs recorded on the CD, so the RAM memory capacity is small.
Therefore, the microcomputer 21 itself is relatively small and inexpensive.

In the above description, a CD (Compact Disc) is used as an example of the disc, but any disc other than a CD may be used as long as the disc has TOC information recorded. It goes without saying that the present invention can also be applied to an apparatus for reproducing a disc satisfying the above conditions.

〔effect〕

Since the disk player of the present invention is configured as described above, it has a practical effect that a microcomputer with a small RAM capacity can be used, and the cost of the microcomputer can be reduced, and the cost of the disk player can be reduced.

[Brief description of drawings]

FIG. 1 is a system block diagram of the disc player of the present invention, FIG. 2 is a flow chart for explaining the main operation of the present invention,
FIG. 3 is a flowchart for explaining the main operation of the conventional example. 10 ... CD player, 13 ... Servo processor LSI, 14 ...
… Data processor LSI, 19 …… Operation keys, 20 …… Optical remote controller, 21 …… Microcomputer, 22 …… Display section.

Claims (1)

[Scope of utility model registration request] 1. A RAM provided with performance reservation setting means for reading and storing TOC information recorded at a predetermined position on a disc.
In a disc player having a control microcomputer in the control microcomputer, a signal detection section for outputting a detection signal according to the content of the signal only when the signal is supplied from the performance reservation setting means,
A control unit for inputting a detection signal from the signal detection unit and for reading only specified data from the TOC information according to the content of the detection signal and storing the data in the RAM.
An arithmetic unit that calculates the total playing time of a designated reserved song from the data stored in the RAM, and the calculation result of the arithmetic unit and information such as the performance start time of each song stored in the control unit. A disc player comprising at least a display unit for displaying data.