JPH0247033B2 - - Google Patents

Description

Detailed Description of the Invention Technical Field The present invention relates to an information reproducing system, and in particular to an apparatus that has a plurality of storage positions for storing recording media and sequentially reproduces recorded information on the recording media stored in these storage positions. The present invention relates to an information reproduction method.

Background Art For example, record discs or digital audio discs (hereinafter referred to as
Conventionally, information playback devices that can store multiple recording media called DAD (abbreviated as DAD) and can continuously play back the recorded information on these recording media play back only pre-specified songs in a specified order. method was adopted.

However, when an information reproducing device that reproduces information using the conventional information reproducing method is used in a game such as Ogura Hyakunin Isshu, the playback order of Hyakunin Isshu songs is known in advance, which reduces the fun by half. It was hot.

Summary of the Invention An object of the present invention is to provide an information reproduction method that can randomly set the reproduction order of recorded information on a plurality of recording media.

An information reproducing method according to the present invention is an information reproducing method for a reproducing apparatus having a plurality of storage positions for storing recording media and reproducing recorded information of the recording medium stored in the plurality of storage positions, wherein the information reproducing method uses a random number A recording medium selection process that continuously generates a plurality of recording media over time, and selects one of the plurality of recording media stored in each of the plurality of storage positions by the random number 1 in response to a random music selection command. Then, a group of song numbers assigned to a group of recording information recorded on one recording medium selected by the recording medium selection process is imported, and one of the random numbers from the group of song numbers is taken.
The present invention is characterized in that, after selecting and reproducing one of the recorded information groups corresponding to the song number that matches, the processing after the recording medium selection processing is performed again.

Embodiments 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 magazine that stores a plurality of disks in order at a predetermined pitch and is detachably mounted on a predetermined mounting portion. One of the disks D ₁ to D _N stored in a plurality of disk storage positions provided in the magazine 1 is supported by a turntable 4 which is fixed to the rotating shaft of a spindle motor 3 by a disk change mechanism 2. It is transported onto a surface and clamped. Recorded information on the disk Dx clamped on the disk supporting surface of the turntable 4 is read by a pick-up 5. The pick-up 5 includes a laser diode, an objective lens, a focus actuator, a tracking actuator, a photodetector, and the like. The focus actuator and tracking actuator of this pickup 5 are driven by an error signal generated from the output of the pickup 5 by a focus servo circuit and a tracking servo circuit (not shown).
The output of the pickup 5 is supplied to a decoder circuit 7 via an RF amplifier 6. The decoder circuit 7 is
For example, EFM (Eight to Fourteen Modulation)
It consists of a demodulation circuit. The data decoded by the decoder circuit 7 is supplied to the data extraction circuit 8 and is separated into control information data indicating during a song, between songs, song number, playing time, address, etc., and audio information data. . The audio information data becomes an audio output by a D/A converter (not shown) or the like. Further, control information data is supplied to the controller 9. The controller 9 includes output data of the random number generation circuit 10,
A random music selection mode command, etc. issued from an operation section (not shown) is supplied. Random number generation circuit 10
The counter includes, for example, a counter whose count value changes sequentially in an extremely short cycle, and is configured to output the output after latching it in response to a command from the controller 9. The controller 9 also includes a processor, ROM (Read Only Memory), RAM
(Random Access Memory), etc., and is configured to issue commands to a random number generation circuit 10, a motor drive circuit 11, a disk change drive circuit 12, and various servo circuits. The motor drive circuit 11 is configured to supply a drive current according to a command to a motor 13 that moves a slider (not shown) carrying the pickup 5 in the radial direction of the disk Dx. In addition, the disk change drive circuit 12
is a motor 14 that drives the disk change mechanism.
The drive current is configured to supply a drive current according to a command to the drive current.

In the controller 9 with the above configuration
The following processing is performed by a processor that operates according to a program stored in advance in the ROM. That is, in the main routine of a program stored in advance in the ROM, it is detected that the random music selection mode is specified, for example, by an instruction to detect the state of a flag that becomes 1 in response to a random music selection mode command from the operation unit. 2, the controller 9 reads the address information extracted by the data extraction circuit 8 (step S ₁ in FIG. 2) and compares it with the previously stored address information. Then, it is determined whether or not the song being played has ended (step _S2 in the figure). If the song being played has not finished, the controller 9 resumes processing by executing the main routine. When the song being played ends, the controller 9 generates a plurality of disk numbers each representing a plurality of disks that should be stored in storage positions of the magazine 1, excluding the disk that has already been stored as a non-existent disk. One of them is generated using data obtained by issuing a command to the random number generation circuit 10 (step S ₃ in the figure). Incidentally, the processing in step _S3 can be performed as follows.
That is, the controller 9 is configured to first count the number of disks that it remembers as being present (this value is set to n), and then to latch the output of a counter whose count value changes sequentially in an extremely short cycle. By repeatedly subtracting n from the output x of the random number generation circuit 10, the remaining number m (the remainder when x is divided by n) which can no longer be subtracted is obtained. Adding 1 to this gives m+1, which is a random number from 1 to n. Therefore, one random disk number is selected from among the existing disks by sequentially counting the disk numbers of the existing disks (m+1).

Next, the controller 9 determines whether the generated disc number is equal to the disc number of the disc currently being played (step _S4 in the figure), and if both disc numbers are equal, the controller 9 selects the song recorded on the disc currently being played. One of the plurality of song numbers shown is generated by the random number generation circuit 10 (step _S5 in the figure). Incidentally, the processing in step _S5 can be performed as follows. That is, first, the controller 9 calculates the number of recorded songs from the information of the start song number and the end song number in the TOC information (this value is set as P), and then the random number generation circuit 1
P is repeatedly subtracted from the output y of 0 to obtain the remaining number q (remainder when y is divided by P) which can no longer be subtracted. Add the start song number to this, q+
STNO (start track number) is a random disc number from the start track number to the end track number.

Next, the controller 9 issues a command to the motor drive circuit 11 and various servo circuits so that the song with the generated song number is played (step S ₆ in the figure).
Resume processing by executing the main routine.

In step _S4 , if the generated disk number is not equal to the disk number of the disk being played, the controller 9 issues a command to various servo circuits to stop the playback operation of the disk being played (step S4 in the figure). ₇ ). Next, the controller 9 instructs the disc change drive circuit 12 so that the disc that was being played is stored in the magasin 1 and the disc with the newly generated disc number is conveyed onto the disc support surface of the turntable 4 and clamped. A command is issued (step _S8 in the figure). Next, the controller 9 issues commands to various servo circuits to start the servos (step _S9 in the figure), and determines the presence or absence of a disk depending on whether the focus servo is in a locked state within a predetermined time ( Step _S10 in the same figure). If there is no disk, the controller 9 will use RAM.
It is stored in the area set as the disk presence/absence memory that the disk with the newly generated disk number does not exist (step _S11 in the figure). Next, in the same manner as in step _S3 , the controller 9 enters a plurality of disk numbers each representing the remaining disks excluding the disk that has already been stored as a non-existing disk among the plurality of disks to be stored in the storage positions of the magazine 1. one of them
(step _S12 in the same figure), and the processing from step _S7 onwards is performed again.

When the presence of the disk is confirmed by the determination in step _S10 , the controller 9
obtains the TOC information recorded on the innermost circumference of the disk, that is, the track number data indicating the number of recorded tracks and the recording position, from the data extraction circuit 8 (step 8 in the same figure).
_S13 ). Next, the controller 9 generates one of a plurality of song numbers each representing a recorded song (step _S14 in the figure) in the same manner as step _S5 , and performs the processing from step _S6 onwards.

As mentioned above, you can always store multiple DADs and these
Although the case of a multi-disc player that can play DAD continuously has been described, the present invention is a multi-disc player that can constantly store a plurality of video discs or cassette tapes and that can continuously play back information recorded on these video discs or cassette tapes. It can be applied to the equipment to obtain. In this case, if you do not know the number of recorded songs in advance, you can generate an appropriate random number and select a song, and if the selected song does not exist as a result of the search, you can generate random numbers again and select a song. .

Effects of the Invention As detailed above, the information reproducing method according to the present invention selects one of a plurality of disks using random numbers, detects the number of recorded songs on the selected disk, and then selects one of the recorded songs. Since the system uses a method in which the songs are selected and played using random numbers, the order in which the songs are played is set at random, which does not detract from the fun of games such as Ogura Hyakunin Isshu. . In addition, the information reproducing method according to the present invention memorizes the disc whose non-existence is detected and prevents it from being selected, and further imports the track number information of the track recorded on the selected disc and then uses the random number to match the track number. Since the music is selected based on the selection of music, there is no need to select a music that does not exist, and unnecessary operations can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a flow diagram showing the operation of the apparatus shown in FIG.

Claims (1)

[Claims] 1 Has multiple storage positions for storing recording media,
and an information reproducing method of a reproducing device that reproduces recorded information of recording media stored in the plurality of storage positions, wherein random numbers are continuously generated in time and the information is played back in the plurality of storage positions in response to a random music selection command. A recording medium selection process is performed in which one of the plurality of recording media stored in each position is selected by the random number 1, and then recording is performed on the one recording medium selected by the recording medium selection process. After importing a group of song numbers assigned to a group of recorded information, and selecting and reproducing 1 of the group of recorded information corresponding to a song number that matches the random number 1 from the group of song numbers, the group of recorded information An information reproducing method characterized in that the processing after the medium selection processing is performed again.