JPH07220377A - Disk changer device - Google Patents

Abstract

PURPOSE:To shorten waiting time for switching disks in a changer player for switching and reproducing plural disks. CONSTITUTION:This device is provided with a reproducing means for reproducing a disk reproducing part 1 at the speed higher than a target reproducing speed, the reproduced data is stored in a memory 3 and data stored therein is outputted from a reading output part 5 at a targetted rate. When the capacity of the memory 3 exceed the storage range, the reproducing part is controlled so as not to always exceed the storage range, and when target music reproduction is finished by the disk reproducing part, the disk is immediately switched. During this period, the output is continued by data stored in the memory, thereby the disk is exchanged before the output of the target music is finished and next music is reproduced immediately after the music is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a disc changer suitable for a karaoke machine or the like.

[0002]

2. Description of the Related Art In a device such as karaoke that randomly reproduces a target song from a plurality of discs such as CDs, it is desirable to shorten the time until the next song (track) starts to be played after the end of one song. It is rare. For this reason, efforts are being made to accelerate the mechanical replacement operation, but the operation noise increases,
In order to make it difficult to secure the reliability, a changer device is provided with reproducing means in parallel and two or more mechanisms are prepared, and a plurality of tracks are reserved in advance and the next disc is loaded into another reproducing portion during performance. It was solved by waiting.

[0003]

For this purpose, a plurality of reproducing sections are required, and the disk exchanging mechanism becomes complicated, resulting in deterioration of reliability, increase in cost, and increase in size of the apparatus.

[0004]

Memory means is provided between a reproducing means and an outputting means from a disc, a reproducing rate of the reproducing means is made larger than a predetermined output rate, and data is preliminarily stored in the memory means. When writing from the reproducing means to the memory means is completed up to a predetermined end point, disk exchange is started by the disk exchanging means, and the output means reads out the data stored in the memory to continue the output and the next disk to be reproduced. Search and complete the attachment to the playback means.

[0005]

As a result, since the next disc is already being exchanged while the target track of the music or video information to be reproduced from the disc is being reproduced, the next reserved song can be accessed and the next disc is immediately reproduced after the end. Can be viewed. It is possible to reproduce continuously as much as the system of two reproduction mechanisms.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A block diagram of one embodiment is shown in FIG. 1, an operation explanatory view is shown in FIG. 2, and a flow chart is shown in FIG. The disc is reproduced by a changer system in which a target disc can be exchanged and mounted by a disc exchanging unit 2 capable of exchanging the disc in a disc reproducing unit (disc drive) 1 capable of reproducing the disc at a predetermined speed. When the reproduction of the target music A is started, the reproduction is started. Here, the drive 1'is reproduced at a speed faster than the normal reproduction rate.

Generally, the disc exchange time is about 10 seconds, and one piece of music has a short reproduction time, and if it is 100 seconds, it can be reproduced about 10% faster. This reproduction data is written in the memory 3 having a FIFO function and read out at a predetermined constant rate, data processing of a video signal and an audio signal is performed, and the output section 5 is outputted.
Are processed, and the respective signals are output. Here, the entire operation is controlled and managed by the microprocessor (CPU) 4. Here, as shown in the flow chart of FIG. 3, the reproduction of the music starts and the drive is driven faster than a predetermined speed (S1).

The memory is written (S2), the data in this memory is read (S3), and since the data is higher than the rate, the data is sequentially stored in the memory 3. When the memory 3 approaches saturation, a pause command is given to the drive 1'of the disc reproducing unit (S4) so that the writing is temporarily stopped. When a predetermined space is available in the storage capacity of the memory 3, the drive restarts, the reproducing operation is continued, and this is repeated. The CPU 4 monitors the data written to the memory 3, that is, the reproduction state of the drive, and when the tune ends, the drive is stopped (S5) and the writing to the memory 3 is also stopped. The memory address at which the writing to the memory 3 is stopped is stored in the CPU 4.

On the other hand, a disc replacement is instructed to the exchanging unit to mount a new disc (S6), and a target music piece is cued (S7). During this time, the reading from the memory 3 is continued to the output section and the reproduction of the music A is continued. CPU
When the previous memory stop address is read by 4, the real-time reproduction A'of the song A is completed, and the next song B is continuously reproduced to output B'at a predetermined speed. Here, the amount of memory may be about 10 seconds, which is the amount of data corresponding to the exchange time of the disk. In the above embodiment, when the memory approaches saturation, the pause command was issued to the drive, but if the memory stores data for a predetermined time, the speed of the drive that maintains that state is changed to change the normal rate. You can set the playback speed. In this case, when the memory 3 approaches saturation, the CPU 4 may control the disk reproducing unit 1 to reduce the speed to the normal speed so that the writing / reading rate is matched and the reproduction is continued with the maximum amount of memory.

The necessary buffer amount is, for example, 1
If you want to finish 0 seconds earlier, you have about 11 seconds of RAM, which is slightly larger than 10 seconds, and you can finish 10 seconds early when playing a song for 3 minutes (180 seconds), so if you finish in 170 seconds about 6% The drive plays quickly and finishes in 170 seconds. In the case of a song longer than this, if the steady speed is the same as the reading speed after 170 seconds, it will always end 10 seconds earlier.

As a result, even if the data does not have an address like general audio data, it is not necessary to stop the reproduction once, so that there is no fear that the data connection will be broken. (If you stop ordinary audio data once, even if they are connected with the same subcode, they are not managed in the order of audio sample data, so noise may occur without being connected.)

Further, when it takes time to search a new disc, it is possible to detect this and delay the reading from the memory to extend the reproduction time of the previous disc. By doing so, it is not necessary to calculate the input / output address difference of the RAM or the like to obtain the amount accumulated in the RAM, and this can be realized only by temporal management.

[0013]

As described above, even when data such as a compact disc is reproduced and a plurality of discs are exchanged and reproduced, the waiting time of the exchange time can be reduced. Further, since the reproduction speed is increased, the influence of the disc scratches on the servo is reduced and the stability is increased.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram.

FIG. 3 shows a flowchart.

[Explanation of symbols]

 1 Disc playback unit 2 Disc replacement unit 3 Memory 4 CPU 5 Output unit

Claims (4)

[Claims] 1. In a changer device having a replacement part in which a plurality of discs are accommodated in the disc reproduction part and the discs can be exchanged and mounted, the reproduction speed of the disc reproduction part is reproduced faster than a speed corresponding to a predetermined reproduction output rate. Means, a memory means for temporarily storing the reproduced data, a reading means for reading from the memory means at a predetermined reproduction output rate, a means for detecting the end of the target reproducing section in the reproducing section, and a reproduction end And a control means for controlling to start the disk exchange upon detection.
A disc changer device in which while the disc is being exchanged, the output of the disc before the exchange is continued according to the data from the memory and the next disc to be reproduced is mounted in the reproducing section. 2. The method according to claim 1, wherein it is detected that predetermined data is stored in the memory, and the reproduction speed of the reproduction unit is controlled so as to match the memory read speed.
The described disc changer device. 3. The disc exchanging unit detects that the time required to search for a new reproduction disc is insufficient even if a predetermined amount of memory is read out, and the predetermined memory reading speed is slowed to extend the time. The disc changer device according to claim 1. 4. A method for detecting that the data from the reproducing disk has been turned off, stopping the erasing of the data stored in the memory, and repeatedly obtaining a reproduced output from the contents of the memory during the search time to prevent the output signal from becoming erratic. The disc changer device according to claim 1, wherein: