JPS61162878A - Disk player - Google Patents

Abstract

PURPOSE:To improve operability by starting reproduction from a designated reproduction starting address, and terminating reproduction at designated reproduction terminating address, and at the same time, making fade-in action at the reproduction starting address and making fade-out action at the reproduction terminating address. CONSTITUTION:When inputted from an operating means 8, reproduction starting address is stored in an operating means 5 and reproduction terminating address is stored in the operating means 8 respectively. When a reproduction start indication signal (d) is given, the address information read from a pickup means 1 is inputted to the operating means 5, 8 and the position of reproduction is watched at all times. When the reproduction starting address is detected, the operating means 5 shifts from searching operation to reproducing operation, and outputs a signal (b) of a signal processing circuit 3. At this time, a signal (c) outputted by the operating means 8 is changed from high level to low level, and applied to the base of a transistor 43 through a time constant circuit. Accordingly, the transistor 43 is made off slowly, and so-called fade-in action is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to disc players such as optical digital audio disc players and video disc players.

[Conventional technology]

In recent years, in addition to so-called analog audio disc players (record players) that record and reproduce audio signals in an analog manner, disc players such as video disc players and digital audio disc players have become popular in general households.

FIG. 3 shows a block diagram of a digital audio disc player among such disc players.

In the figure, reference numeral 1 denotes a pickup means for reproducing signals from a disk (not shown), the output of which is supplied to a signal detection circuit 2.

The output (RF signal) of the signal detection circuit 2 is supplied to the signal processing circuit 3, where it undergoes signal processing such as determining the logic of 1 or O, reading data, and deinterleaving.
The signal is supplied to an audio circuit 4 including an A conversion circuit, and is converted from a digital signal to an analog signal and output to an output circuit (not shown). An operating means 5 such as a microcomputer controls the driving of the disk, the reproduction state, etc. via a servo circuit 6. signal processing circuit 3,
Various circuits and means, including the audio circuit 4, the operating means 5, and the servo circuit 6, are supplied with power from a power supply circuit 7.

[Problem that the invention seeks to solve]

In such a conventional disc player, the operating means 5
By inputting a predetermined playback start address, playback can be started from that address.

Playback could not be ended at a predetermined address, nor could it be faded in or out, resulting in poor operability.

[Means for solving problems]

FIG. 1 shows a block diagram when the present invention is applied to a digital audio disc player, and parts corresponding to those in FIG. 3 are given the same reference numerals, and detailed description thereof will be omitted.

In this disc player, a pickup means 1, a signal detection circuit 2, a signal processing circuit 3. Audio circuit 4, operating means 5. Servo circuit 6, power supply circuit 7
In addition, an operating means 8 having a switch 8] is provided (of course, the operating means 8 can also be configured integrally with the operating means 5), and the audio circuit 4 is provided with a resistor 42.
．． 44.45.47, transistor 43, capacitor 4
It has a fade circuit consisting of 6. The other configurations are the same as in FIG. 3.

[Effect]

The operation will be explained with reference to FIG.

When the switch 81 is turned off, the operating means 8 outputs a low-level signal (C), the transistor 43 is turned off, and the same operation as in the conventional case is performed, and no fade-in or fade-out operation is performed. do not have.

When the switch 81 is turned on, the operating means 8 outputs a high-level signal (c) and turns on the transistor 43, so that the signal from the audio circuit 4 is faded and not output.

In this state, when a playback start address (for example, 0 minutes 10 seconds of the first track) and a playback end address (for example, 3 minutes and 30 seconds of the first track) are input from the operating means 8, the playback start address is input to the operating means 5, and the playback end address is input to the operating means 5. The end addresses are each stored in the operating means 8. Thereafter, at time A, when the operation means 8 issues a reproduction start instruction signal (d), the operation means 5 outputs a signal to the servo circuit 6 to drive the disk and search for the reproduction start address. The address information read from the reproduction signal output from the pickup means 1 is input to the operation means 5 and 8, and the reproduction position is constantly monitored. When the operating means 5 detects the reproduction start address at time B, it outputs an output therefrom, causes the search operation to shift to the reproduction operation, and causes the signal processing circuit 3 to output the signal (b). Also, at this time, the signal (c) output by the operating means 8 is converted from a high level to a low level. This signal (c) is
．． Since the voltage is applied to the base of the transistor 43 through a time constant circuit consisting of 45.47 and a capacitor 46, the transistor 43 is gradually turned off. Therefore, the level of the signal (a) output from the audio circuit 4 gradually increases for a predetermined period of time and the fade is canceled), so that a so-called fade-in operation is performed.

When the operating means 8 detects that the reproduction position becomes equal to the stored reproduction end address at time C, it inverts the signal (C) from a low level to a high level 6 Therefore, the transistor 43 is gradually turned on, and the audio circuit 4 signal (a)
The level gradually decreases for a predetermined time T1, and a so-called fade-out operation is performed. Further, the operating means 8 detects the playback end address for a predetermined time T, (T, <'rz
), outputs a signal (d) to the operating means 5. As a result, the operating means 5 prohibits the signal processing circuit 3 from outputting the signal (b), causes the servo circuit 6 to stop rotating the disk, and ends the reproduction operation. In this case, an address (for example, 10 seconds) earlier than the designated playback start address (1st track 0 minutes 10 seconds) by the predetermined time Tl (for example, 10 seconds) required for fade-in.
You can also store the playback start position at 0 minutes 0 seconds of the 1st track, or store the specified playback end address (3 minutes 30 seconds of the 1st track) as the playback start position.
It is also possible to store an address (3 minutes and 20 seconds of the first song) that is a predetermined time T1 (for example, 10 seconds) before the fade-out time (seconds) as the playback end position.

If a playback start instruction signal is issued when a playback end address is not input and only a playback start address is input, the playback start address is searched, playback is started from the playback start address, and the final position of the disc is reached. After playing up to that point, playback is stopped. Alternatively, the TOC signal at the beginning of the track in which address information including the start position and end position of each track is recorded is read prior to the start of playback, for example when the disc is loaded, and the input playback start address is read. The end position of the song corresponding to the playback end position may be automatically stored in the operating means 8 as the playback end position, and the playback may be ended when the song ends. In that case, the address (5 minutes 20 seconds) before the end position of the song (for example, 5 minutes 30 seconds) by the predetermined time Ti (10 seconds) required for fade-out.
can also be stored as the playback end position. It is also possible to input only the playback end address and use it in the same way.

When a reproduction start instruction signal is issued in a state where both a reproduction start address and a reproduction end address are not input, each of them is sequentially reproduced from the beginning to the final position of the disc.

In the above, reproduction between arbitrary two points has been described, but after the reproduction between arbitrary two points is completed, it is also possible to perform reproduction between the next two points. Further, these operations and the fade-in and fade-out operations may be performed independently. Furthermore, although the present invention has been described above as applied to a digital audio disc player, it is clear that it can also be applied to other disc players.

〔effect〕

As described above, in the present invention, when a playback start instruction signal is issued in a state where both a playback start address and a playback end address are specified, playback is started from the specified playback start address, and the playback is completed at the specified playback end address. Since the playback is ended at the address, the fade-in operation is performed at the playback start address, and the fade-out operation is performed at the playback end address, operability is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram when the present invention is applied to a digital audio disc player, FIG. 2 is a timing chart thereof, and FIG. 3 is a block diagram of a conventional digital audio disc player. 1...Pickup means 2...Signal detection circuit 3...Signal processing circuit 4...Audio circuit 5.8...Operating means 6...Servo circuit 7...
Power supply circuit 41...Fade circuit 81...Switch or more

Claims (1)

[Claims] (1) In a disc player equipped with operating means such as a microcomputer to control the operating state of the disc,
The operating means is capable of specifying and storing the playback start address and playback end address of the disc, receives address information corresponding to the playback position of the disc, and specifies both the playback start address and the playback end address. When a playback start instruction signal is issued in the specified state, playback starts from the specified playback start address, ends playback at the specified playback end address, and performs a fade-in operation at the playback start address. A disc player characterized in that a fade-out operation is performed at the playback end address.