JPH01102771A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To offer convenience to a user by inputting and setting the reproducing speed information of data set at the time of setting input for the reproducing function of a program simultaneously, and switching the reproducing speed of each of data based on the speed information automatically. CONSTITUTION:In a reproducing function part 11 where plural data recorded on a disk 12 are reproduced in sequence of inputting and setting, the reproducing speed information of the data inputted and set at the time of setting the input for the reproducing function of the program is inputted and set simultaneously, and the reproducing speed of each of data is switched automatically based on the speed information. Therefore, for example, when a disk reproducing signal is recorded on a tape, etc., it is possible to reproduce music desired to listen at reference speed and to record the music other than that as switching automatically so as to reproduce it at double speed. In such a way, it is possible to offer the convenience to the user by promoting the multifunction of a device.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a disc playback device capable of switching the playback speed, and particularly relates to a program playback function for convenient handling. related to what was done.

(Prior Art) As is well known, in a disc playback device such as a compact disc player, recording is performed in consideration of recording the played analog audio signal on another recording medium such as a tape. In order to shorten the time, some devices have been added with a function that allows playback to be performed at twice the standard speed.

However, this type of disc playback device is still in the development stage, and it is difficult to perform optimal playback operations when playing at standard speed and when playing at twice the standard speed. Also, the standard 2
There is still a lot of room for improvement in terms of configuration and performance, such as making it easier to handle by making active use of the ability to play at twice the speed.

(Problems to be Solved by the Invention) As described above, conventional disc playback devices with only a small playback function that plays at twice the standard speed are not yet fully capable of meeting the needs of users. The problem is that there is no.

Therefore, the present invention has been made in consideration of the above-mentioned circumstances, and when setting input for a program playback function that sequentially plays back a plurality of data recorded on a disc in the input setting order, the input set data is By inputting and setting the playback speed information at the same time, and automatically switching the playback speed when playing each data based on this speed information,
For example, when recording a disc playback signal onto a tape, etc., the song you want to listen to can be played back at semi-speed II, while other songs can be played back at double speed while automatically switching while recording, promoting multi-functionality and usage. It is an object of the present invention to provide an extremely good disc playback device that can be conveniently handled by a person.

[Structure of the Invention] (Means for Solving the Problems) That is, the disc playback device according to the present invention has a program playback function for sequentially playing back a plurality of data recorded on a disc in an input and set order, and The target is a device in which the playback speed can be changed by changing the rotational speed of the disc. Then, when setting input for the program playback function, playback speed information of the input data is also input and set, and based on this speed information, the playback speed is automatically switched when playing each data. It is something.

(Function) According to the above configuration, when setting input for the program playback function, playback speed information of the input data is also input and set, and based on this speed information, when playing each data Since the playback speed is automatically switched, for example, when recording a disc playback signal onto a tape, etc.
It is possible to record while automatically switching to play back the desired song at standard speed and play back other songs at double speed, promoting multi-functionality and making handling convenient for the user.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 11 denotes a disk reproducing mechanism section, which drives the disk 12 by an ffff1L disk motor 13.
It is composed of a disk table 14 that is rotationally driven by the action of the disk table 14, an optical pickup 15 that reads digital data recorded on the disk 12, and a pickup feed motor 16 that moves the optical pickup 15 in the radial direction of the disk 12. has been done.

Then, the reproduction R output from the optical pickup 15
The F signal is transmitted to an analog amplifier circuit 21 consisting of a current-voltage conversion amplifier circuit 17, 18, a wideband RF amplifier circuit 19, and a feedback circuit 20 that determines the characteristics of the wideband RF amplifier circuit 19.
After being amplified, the signal is supplied to the servo control circuit 22.

This servo control circuit 22 receives input reproduction R.
, F signals are level-sliced at a predetermined slice level and converted into digital data, and a disk motor control signal and a pickup feed motor control signal are generated based on this digital data.

Of these, the disk motor control signal is supplied to the disk motor 13 via a drive circuit 25 consisting of an amplifier circuit 23 and a feedback circuit 24, and its rotational speed is controlled. Further, the pickup feed motor control signal is supplied to the pickup feed motor 16 via the drive circuit 26, and the optical pickup 1
5's movement speed is controlled.

Note that within the analog amplifier circuit 21, a tracking error signal and a focus error signal are generated. Of these, the tracking error signal is supplied to the optical pickup 15 via a drive circuit 29 comprising an amplifier circuit 27 and a feedback circuit 28, and performs tracking servo for an objective lens (not shown). Further, the focus error signal is supplied to the optical pickup 15 via a drive circuit 32 consisting of an amplifier circuit 30 and a feedback circuit 31, and focus servo for the objective lens is performed.

Here, the servo control circuit 22 uses a phase locked loop circuit (PLL) based on the generated digital data.
) 33 to generate a bit synchronization clock.

Then, the servo control circuit 22 generates a data extraction clock based on the bit synchronization clock and outputs it to the digital signal processing circuit 34 together with the digital data.

This digital signal processing circuit 34 synchronizes with a system clock outputted from a clock generation circuit 36 including a crystal oscillator 35, and a RAM (read only memory) 3.
7 is used to perform jitter component absorption, error correction, and correction processing on digital data. The digital data output from this digital signal processing circuit 34 is then transferred to a D/A (digital/analog) conversion circuit 38.
The signal is converted into an R channel analog signal and supplied to an audio reproduction system (not shown) via amplifier circuits 39 and 40 and output terminals 41 and 42, respectively.

Here, this compact disc player has:
A reproduction speed control circuit 43 is provided.

When the disc 12 is required to be played back at twice the standard playback speed, the playback speed control circuit 43 controls the crystal oscillator 35 and the phase-locked loop circuit 33 to use a system clock at twice the standard frequency. and control to generate a bit periodic clock, and each feedback circuit 2
Wideband RF amplifier circuit 19 for 0.24.28.31
．． This functions to switch the characteristics of the drive circuits 25, 29, and 32 so that they are optimal for reproduction at twice the standard speed.

The playback speed control circuit 43 also has the function of causing the display circuit 44 to display the operating status, time, etc. of the compact disc player.

Here, the system clock output from the clock generation circuit 36 is supplied to the cassette tape recorder 46 via the digital signal processing circuit 34 and the synchronization control circuit 45. This cassette tape recorder 46 is of a type in which the tape running speed during recording and reproduction changes in synchronization with the system clock, that is, the recording and reproduction speed changes.

Therefore, when the disc 12 is being played back at the standard speed, the system clock is also at the standard frequency, so when the cassette tape recorder 46 is set to the recording state, the recording speed is also standard, and the output terminals 41, 42 The sound signal output from the . Furthermore, when the disc 12 is being played back at twice the standard speed, the system clock is also at twice the standard frequency, so if the cassette tape recorder 46 is set to recording mode, the recording speed will also be twice the standard speed. Therefore, the acoustic signal output from the output terminals 41 and 42 is recorded on the tape as marked 2.
Records will be recorded at twice the speed.

In the above configuration, the features of the present invention will be explained below with reference to the flowchart shown in FIG. First, in step S1, input settings for program playback, that is, presets are performed. This presetting is performed, for example, by setting the song numbers of the songs desired to be recorded on the cassette tape by the cassette tape recorder 46 among the plurality of songs recorded on the disk 12 in the order in which they are to be recorded on the cassette tape.

At this time, in addition to setting each song number, designation as to whether the disc 12 is to be played back at standard speed or double speed is also made for each song at the same time. In this case, disk 12
A speed flag is set and stored in a memory (not shown) based on the designation of whether the playback is to be performed at standard speed or double speed.

In this way, the preset is completed and the disk 12
When the playback is executed, in step S2, the disc playback mechanism section 11 searches for the first song to be played on the disk 12, and enters a pause (-time stop) state at the beginning of that song.

Next, in step S3, the cassette tape recorder 46 is placed in a recording pause state, and then, in step S4, it is determined whether or not a speed flag corresponding to the standard speed mode is set. If it has been set (YES), the disc playback mechanism section 11 is set to the standard speed mode in step S5, and the cassette tape recorder 46 is also set to the standard speed mode in step S6.

Further, if the speed flag corresponding to the standard speed mode is not set in step S4 (No), step S7
Then, the disc playback mechanism section 11 is set to double speed mode,
In step S8, the cassette tape recorder 46 is also set to double speed mode.

After that, in step S9, the cassette tape recorder 46
The cassette tape is run in a recording state in the speed mode set in step S6 or step S8. However, at this time, since the disc 12 has not yet been played back, no signal is being recorded.

After this no-signal recording state is maintained for a waiting state period defined in step S10, step S1
At step 1, playback of the disc 12 is started, and the disc playback signal begins to be recorded on the cassette tape. In this case, disc playback continues until the interval between songs on the disc 12 is determined in step 812, that is, until the first song searched in step S2 ends.

Thereafter, in step 313, it is determined whether or not it is the last song, and if it is the last song (YES), step 814
Then, disc playback is stopped and step 31 is performed.
At step 5, the running of the cassette tape is stopped and the process ends (step 816).

Also, in step S13, if the song is not after R (No)
In step 317, the disc playback structure section 11 searches for the beginning of the song to be played next and enters a pause state. Then, in step 818, it is determined whether or not it is double speed mode. If it is not double speed mode (No), a 4-second timer is started operating in step 319, and if it is double speed mode (N
o) In step S20, a two second timer is started.

The 4-second timer and 2-second timer generate end signals when 4 seconds and 2 seconds have elapsed from the start of their operation, respectively.

Thereafter, in step S21, if it is determined that the timer operation has ended (YES), the process returns to step S3.

Here, the cassette tape continues to run in the standard speed mode or double speed mode after the recording is started in step S9 until the process returns to step S3 and the cassette tape recorder 46 enters the pause state. Therefore, in step S17, the disc playback mechanism section 11 enters a pause state,
By holding the standard speed mode for 4 seconds and the 0 speed mode for 2 seconds, unrecorded portions between songs are automatically generated on the cassette tape.

According to the configuration of the above embodiment, when inputting and setting a song number for the program playback function, the playback speed of the song with the inputted song number is also input and set, and based on this set speed, famous songs are For example, when recording a disc playback signal onto a tape, the playback speed can be automatically switched so that the song you want to listen to will be played at standard speed and the other songs will be played at double speed. This allows for multi-functionality and convenient handling for the user.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] Therefore, as described in detail above, according to the present invention, when setting an input for a program playback mode in which a plurality of data recorded on a disk are sequentially played back in the input setting order, the input By inputting and setting the playback speed information of the set data, and automatically switching the playback speed when playing each data based on this speed information, for example, when recording a disk playback signal on a tape, etc. We have created an extremely good disc playback device that can record while automatically switching between playing back the songs you want to listen to at standard speed and playing other songs at double speed, promoting multi-functionality and making handling convenient for the user. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of a disc reproducing apparatus according to the present invention, and FIG. 2 is a flowchart for explaining the operation of the embodiment. 11... Disk playback mechanism section, 12... Disk,
13... Disc motor, 14... Disc table, 15... Optical pickup, 16... Pickup feed motor, 17.18... Current-voltage conversion amplifier circuit, 19... Broadband RF amplification Circuit, 20... Feedback circuit, 21... Analog amplifier circuit, 22... Servo control circuit, 23... Amplifier circuit, 24...
Feedback circuit, 25.26 drive circuit, 27... amplifier circuit,
28...Feedback circuit, 29...Drive circuit, 30...
Amplifying circuit, 31... Feedback circuit, 32... Drive circuit,
33... Phase locked loop circuit, 34... Digital signal processing circuit, 35... Crystal oscillator, 36... Clock generation circuit, 37... RAM. 38...D/A conversion circuit, 39.40...Amplification circuit, 41.42...Output terminal, 43...Playback speed control circuit, 44...Display circuit, 45...Synchronization control circuit,
46...Cassette tape recorder. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] It has a program playback function that sequentially plays multiple pieces of data recorded on a disc in the input and set order.
In a disc playback device capable of switching the playback speed by switching the rotational speed of the disc, when setting input for the program playback function, playback speed information of the input data is also input and set, and this speed information is set. A disc reproducing apparatus characterized in that the disc reproducing apparatus is configured to automatically switch the reproducing speed when reproducing each of the data based on the following.