JPH0689547A - Device for reproducing disk having random music selection function - Google Patents

Abstract

PURPOSE:To prevent the same music is reproduced continuously, etc., when the same disk is listened repeatedly by making a corresponding music number be a reproducing music number when a random number value is unmatched with the random number value stored in an exception music memory and updating the oldest random number in the memory by that value. CONSTITUTION:Random number from a random number generation part 9 is selected, and prescribed numbers of the random number corresponding to an exception music are stored in an exception music memory 11 in order of a new number. Then, when the random number from the generation part 9 are unmatched with the random numbers stored in the memory 11, a selection corresponding to the random number is decided as a next reproducing selection through a memory control part 12, a music selection control part 8. At this time, the oldest random number stored in the memory 11 is updated by the random numbers, even when the same disk is listened repeatedly, the same music is prevented from being reproduced continuously or in a short period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus with a random music selection function for automatically and randomly selecting a song from a plurality of songs stored on a disc, and more particularly to the same. The present invention relates to a random music selection function suitable for so-called random repeat reproduction in which a disc is randomly reproduced many times.

[0002]

2. Description of the Related Art Generally, in a disc reproducing apparatus, when repeat reproduction is performed, a plurality of songs recorded on a disc are repeatedly reproduced in the same order. I got tired of it, and it was unattractive.

Therefore, as a means for solving such a problem, conventionally, a random number generating means is provided, and the random number generating means is operated at the end of a music piece being reproduced, and the random number value generated from this is dealt with. A disk reproducing device with a random music selection function has been proposed, which is configured to select and reproduce a music piece of a music number from a disk, but in this one, a music piece listened to immediately before or a few music pieces before is reproduced again. There was concern, and it could not be called as a very preferable random music selection function.

In order to improve this, a combination of a random number generating means and a music order memory for storing the music order has been proposed, and a flow chart for determining the random reproduction program is shown in FIG. .

In the flowchart of FIG. 4, Nr is a random number value generated by the random number generating means, Tmax is the number of songs recorded on the disc, and when the random reproduction mode is selected, the random number generating means is operated. Random number N
r is generated, it is confirmed that the random number value Nr is not stored in the song order memory, and it is stored in the song order memory. If the issued random number value Nr is already stored in the song order memory, The random number value Nr is invalidated, and the generation of a new random number value is waited for. By repeating this process, the playback order of all the songs recorded on the disc is stored in the song order memory, and songs are selected from the disc and played according to the order. Was there.

[0006]

In the above-mentioned conventional disc reproducing apparatus with a random music selection function, when reproducing all the songs recorded on the disc, the same song is not duplicated, but the same. Disc twice. In a so-called random repeat reproduction mode in which random reproduction is performed three times in succession, for example, the last song of the first time may overlap with the first song of the second time, and a problem remains in this point.

[0007]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above problems, and in a disc reproducing apparatus with a random music selection function according to claim 1, from a disc on which a plurality of songs are recorded, In a disc reproducing apparatus with a random music selection function for sequentially selecting and reproducing music corresponding to a random number value generated by a random number generating means, a memory means for storing a predetermined number of random number values generated by the random number generating means,
Inquiring the random number value newly generated from the random number generating means as a predetermined number of random number values stored in the memory means,
When there is a matching random number value, the random number value is invalidated, the random number generating means is operated again, and a random number selecting means for selecting a random number value not in the memory means, and the random number value selected by the random number selecting means are stored in the memory. The memory means is stored in place of the oldest random number value among the random number values stored in the means, and the memory means is provided with a memory control means for controlling so as to always store a predetermined number of random number values from the newest one. The tune corresponding to the random number value selected by the random number selecting means is selected from the disc and reproduced.

According to a second aspect of the present invention, in the disc reproducing apparatus with a random music selection function, the number of random values stored in the memory control means and the memory means is recorded on the disc. It is configured to be automatically determined based on the number of songs.

[0009]

With the above-described structure, the music being reproduced is reproduced at least as many times as the number of random number values stored in the memory means until the next reproduction,
By setting the number of random numbers stored in the memory means to an appropriate number, it is possible to avoid the situation where the song played immediately before or a few songs before is played again, and a random song selection function suitable especially in the random repeat playback mode. Is obtained.

Further, by determining the number of random numbers stored in the memory means based on the number of songs recorded on the disc, any disc can be irrespective of the number of songs recorded on the disc. However, the number can be set to a well-balanced value, and there is no concern that a disc may cause a problem.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 to 3 will be described in detail below. FIG. 1 is a flow chart at the time of random music selection reproduction of a disc reproducing apparatus with a random music selection function in one embodiment of the present invention, FIG. 2 is a block diagram showing a main part of the same device, and FIG. Indicates.

First, in FIG. 3, reference numeral 1 denotes a command signal issued from a key switch of the operation unit 2 and the optical pickup 3.
The arithmetic control circuit 4 for controlling the reproduction of the disc in response to the feedback signal from the control circuit 4 operates by receiving the control signal a1 from the arithmetic control circuit 1, and receives the pickup information e1 from the pickup 3 to the position control signal b3 of the pickup 3. And a pickup servo circuit for separating the disc motor 5 into a speed control signal b1 and disc read information b3 (including a control signal and an audio signal), and 6 receives disc read information b3 from the pickup servo circuit 4 and picks up its contents. A signal processing circuit that separates the position signal c1 and the audio signal c3 of 3 and feeds back the position signal c1 to the arithmetic and control circuit 1 as a control signal;
3 is a voice reproduction circuit for reproducing processing, and in the present embodiment,
The arithmetic control circuit 1 has a random music selection function.

Before describing the random music selection function, which is a feature of the present invention, in detail, the basic operation of this type of disk reproducing apparatus will be described with reference to the block diagram of FIG.

When the arithmetic control circuit 1 receives a reproduction command signal by designating a tune by a key switch, the pickup 3 immediately outputs from the pickup 3 which track on the disc the pickup 3 corresponds to. The information e1 is detected, the output information e1 is analyzed by the pickup servo circuit 4, and the disc read information b3
To the signal processing circuit 6. The signal processing circuit 6 first electrically recognizes the current state of the pickup 3 by feeding back the position signal c1 separated from the disc read information b3 to the arithmetic control circuit 1, and then the arithmetic control circuit 1 A servo control signal a1 including the head address signal of the previously designated music is sent to the pickup servo circuit 4. Then, the pickup servo circuit 4 receives the signal and sends the control signal b1 to the dismotor 5 and at the same time, sends the position control signal b2 to the pickup 3 to start the reproduction of the designated music.

During reproduction, the pickup 3 constantly transmits pickup information e1 including a signal indicating the speed of the disc motor 5, a signal indicating the position of the pickup 3 and an audio signal read from the disc to the pickup servo circuit 4. Then, the disc read information b3 consisting of the position signal and the audio signal is separated in the signal processing circuit, the position signal c1 is fed back to the arithmetic control circuit 1, and the audio signal c2 is sent to the audio reproduction circuit 7 and finally the speaker. Is emitted more.

When the music is finished in this way, the pickup 3 outputs pickup information e1 (or disc read information b3) containing a signal indicating the end of the song and a signal indicating the position of the pickup 3 to the signal processing circuit 6. Sent
Further, the signal processing circuit 6 feeds back to the arithmetic control circuit 1 as a position signal c1, and the arithmetic control circuit 1 which recognizes the end of the music by the position signal c1 recognizes the next specified music if there is a music. The servo control signal a1 including the head address signal is sent to the pickup servo circuit 4, and the pickup servo circuit 4 outputs the control signals b1 and b.
By outputting 2 to the disc motor 5 and the pickup 3 and controlling them, the pickup 3 is moved to a position corresponding to a predetermined address on the disc, and when the preparation is completed, the reproduction of the music is immediately started.

Next, the random music selection function, which is a feature of the present invention, is provided in the arithmetic control circuit 1 as described above, and the configuration for executing this music selection function is shown in the block diagram of FIG. explain. 8 is a music selection control unit, 9 is a random number generation unit (random number generation means) which operates in response to a command signal from the music selection control unit 8 and generates a random number value, and 10 is an exclusion for storing a predetermined number of random number values. The song memory (memory means) 11 inquires the random number value generated by the random number generator 9 with the random number value stored in the excluded song memory 10, and if there is a matching random number value, invalidates the input random number value. If there is no matching random number value, a random number selecting section (random number selecting means) that validates the random number value, and 12 stores the random number value output as valid from the random number selecting section 11 in the excluded song memory 10 and is stored. When the number of random number values being stored exceeds a predetermined number, the number of random number values to be stored instead of the oldest random number value and stored in the excluded song memory 10 is recorded on the disc to be reproduced. Calculated based on the number A memory control unit which determines the (predetermined number) (memory control means), a random music selection operation is executed in the flowchart shown in FIG. In FIG. 1, Nr is a random number value generated from the random number generator 9, Tmax is the number of songs recorded on the disc to be reproduced, and P is a pointer for designating an address of the excluded song memory 10. .

When the automatic random music selection reproduction is set by operating the key switch of the operation unit 2, the music selection control unit 8 receives a command signal corresponding thereto and sends a control signal to the memory control unit 12 so that the exclusion music memory is set. The stored contents of 10 are cleared and initialized (step S1), and then the value of the pointer is initialized (P = 1) (step S2). next,
The random number generator 9 is operated to generate a random number value Nr (step S3). This random number value Nr is 1 ≦ Nr ≦ Tmax
That is, it is set within the range of 1 to the number of songs recorded on the disc, and Tmax is obtained from the information of the lead-in area read when the disc is loaded.

The random number value Nr obtained from the random number generating section 9 is sent to the random number selecting section 11, and whether or not the random number value Nr in the random number selecting section 11 matches the random number value already stored in the excluded music memory 10. It is judged (step S4), and if there is a matching random number value, the process returns to step 3 again to operate the random number generating section 9 to obtain a new random number value Nr. If there is no matching random number value, the obtained random number value is obtained. Nr is determined as the music number to be reproduced next, the process proceeds to the next step S5, and the random number value Nr is stored as the exclusion music in the address designated by the pointer P of the exclusion music memory 10 by the memory control unit 12, The value of the pointer P is incremented by 1 (step S
6). In step S5, if there is a random number value already stored in the address designated by the pointer P, the value is updated to a new random number value Nr.

Next, the value of the pointer P advanced by one and the number of random number values stored in the excluded music memory 10 (in the present embodiment, 1 of the number Tmax of music recorded on the disc).
(Number of / 2) is compared (step S7), and if they match,
In the next step S8, the pointer P is initialized.

On the other hand, the random number value Nr determined as the music number to be reproduced next in the random number selection unit 11 is the music selection control unit 8
As a result, as described above, the arithmetic control circuit 1 sends the servo control signal a1 including the start address signal of the music piece to the pickup servo circuit 4, and the pickup servo circuit 4 outputs the control signal b1, By outputting b2 to the disc motor 5 and the pickup 3 and controlling them, the pickup 3 is moved to a position corresponding to a predetermined address on the disc, and when the preparation is completed, the music is reproduced immediately (step S9).

When the end of the music is recognized in step S10 as described above, the music selection control section 8
Returns to step S3 again to operate the random number generator 9 to generate a new random number value Nr, and repeats the same processing as described above to select / determine the song to be reproduced next. It will be played.

In the present embodiment, a song that has been played once cannot be selected unless at least half the number of songs recorded on the disc has been played. Therefore, even if the same disc is repeatedly reproduced twice or three times, there is no problem that the previous or a few songs before are selected again, and it is very suitable as a disc reproducing device with a random music selection function of this kind. It is something.

In the above embodiment, the excluded music memory 10 serving as a memory means stores a random number value which is ½ of the number of songs recorded on the disc. It may be ⅓ or ⅔ of the number of tracks recorded on the disc, or may be a fixed number regardless of the number of tracks on the disc. In particular, if the user can arbitrarily select the number of random number values stored in the excluded music memory 10, a more desirable one can be obtained. Besides, the present invention is not limited to the embodiments described above and shown in the drawings, and it goes without saying that the present invention can be appropriately modified and implemented without departing from the gist of the invention.

[0025]

According to the disc reproducing apparatus with the random music selection function of the present invention, even when listening to the same disc over and over again, the song reproduced immediately before or several songs before is selected and the same song is reproduced. It is possible to exert a suitable random music selection function without being reproduced continuously or in a short cycle, and to provide a useful and practical thing.

The number of random numbers stored in the memory means is automatically determined on the basis of the number of songs recorded on the disc, so that the number can be set regardless of the number of songs recorded on the disc. Instead, it can be set to a well-balanced value.

[Brief description of drawings]

FIG. 1 is a flowchart for random selection and reproduction of a disc reproduction apparatus with a random selection function according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main part of the device.

FIG. 3 is a block diagram showing a main part of the device.

FIG. 4 Flowchart of conventional random music selection

[Explanation of symbols]

 1 Calculation Control Circuit 3 Optical Pickup 4 Pickup Servo Circuit 5 Disk Motor 6 Signal Processing Circuit 8 Music Selection Control Section 9 Random Number Generation Section (Random Number Generation Means) 10 Excluded Music Memory (Memory Means) 11 Random Number Selection Section (Random Number Selection Means) 12 Memory control unit (memory control means)

Claims (2)

[Claims] 1. A disc reproducing apparatus with a random music selection function, which sequentially selects and reproduces a song corresponding to a random number value generated by a random number generating means from a disc on which a plurality of songs are recorded. And a memory means for storing a predetermined number of random number values, and a random number value newly generated by the random number generating means is inquired as a predetermined number of random number values stored in the memory means,
When there is a matching random number value, the random number value is invalidated, the random number generating means is operated again, and a random number selecting means for selecting a random number value not in the memory means, and the random number value selected by the random number selecting means are stored in the memory. The memory means is stored in place of the oldest random number value among the random number values stored in the means, and the memory means is provided with a memory control means for controlling so as to always store a predetermined number of random number values from the newest one. A disc reproducing apparatus with a random music selecting function, characterized in that a song corresponding to the random number value selected by the random number selecting means is selected from a disc and reproduced. 2. The random music selection according to claim 1, wherein the memory control means is configured to automatically determine the number of random number values stored in the memory means based on the number of music pieces recorded on the disc. Disc playback device with functions.