JPH06282926A - Cd-g player controlling method - Google Patents

Abstract

PURPOSE:To prevent disturbance of a moving picture and infeasibility of reproducing even an output picture from a CD-G disk on a monitor screen by stopping operation of a superimposing function upon detection of a fact that a charged quantity of a battery becomes lower than a prescribed value. CONSTITUTION:The charged state of the battery or the input state of a video signal is detected by a detecting circuit 35a during the time of reproducing sound data and graphic data from the CD-G disk and operating the superimposing function. When it is detected that the charged state of the battery becomes lower than the prescribed value or the input of the video signal is stopped, a detected signal is sent to a CPU 29 to stop the superimposing function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for a CD-G player when the charged state of a battery or the input state of a video signal changes during the reproduction of recorded data from a CD-G disc. is there.

[0002]

2. Description of the Related Art In recent years, a compact disc (hereinafter abbreviated as a CD) which has been widely used as music software has a maximum of 21000 tracks. Each track is provided with 98 frames as an information recording unit, and each frame is provided with another recording area called a subcode in addition to the recording area of audio data. Subcodes are P, Q, R, S, T,
It is composed of a total of 8 channels of U, V and W. Of these, the P channel is allocated as a recording area for the cueing signal of the song, and the Q channel is the number of songs on the playback disc and the number of the song being played. It is allocated as a recording area for information on (index), performance time from the beginning of the music, and cumulative performance time.

On the other hand, the 6 channels of subcodes R to W are called user's bits, and it is defined that 6 subcodes are used together. The so-called recording of graphic data on these R to W channels is called. CD-graphics (hereinafter abbreviated as CD-G disc). CD-
The G disc is mainly used as a karaoke disc, and in the R to W channels of the subcode, graphic data of a still image or a video close to it, such as lyrics, commentary, and image to be displayed simultaneously with the reproduced sound, is recorded. There is.

The graphic data reproduced from the R to W channels of the sub-code is decoded into three primary color signals of R, G and B after the error in the reproduced signal is corrected by the graphic processing circuit, and further converted into an analog signal. After that, a color synchronizing signal and a horizontal synchronizing signal are added and color-encoded into a composite video signal. Therefore, by inputting this composite video signal to the CRT monitor, the video of the graphic data recorded in the subcode R to W channels can be displayed on the monitor screen.

In addition, a CD- that reproduces a CD-G disc
In addition to the playback function described above, the G player inputs a video signal from video software such as a video tape or a video disc, or an external device such as a normal TV receiver, and a CD player.
Some G-disks have a superimpose function that can be combined with graphic data read from a G disc and played back.

[0006]

However, in such a conventional CD-G player, when the portable type using a battery is used and the charged amount of the battery becomes small, the above-mentioned superimposing is performed. The following problems occur when the function is activated and playing. That is, when the amount of electricity stored in the battery becomes low, the "LOW BATT" display blinks and normal operation is performed for a while, but a video signal is input from an external device as compared with the output image reproduced from the CD-G disc. Then, the moving image on the monitor screen reproduced in this way is more likely to be disturbed, and the disturbed moving image gives a viewer a feeling of strangeness.

Further, if the connection terminal of the cord for inputting the video signal from the external device is pulled out from the jack portion of the CD-G player when the superimpose function is operated for reproduction, the CD -Since the graphic data from the G disc is output to the CRT monitor in synchronization with the video signal from the external device, it is not possible to do so, and the output image of the graphic data from the CD-G disc, such as karaoke lyrics However, there is a problem that even such a situation may not be reproduced on the monitor screen.

Therefore, according to the present invention, since the charged amount of the battery is reduced, the moving image synthesized by inputting the video signal by the superimpose function is disturbed, or the video signal input by the superimpose function is suddenly input. It is an object of the present invention to realize a control method for a CD-G player that prevents even an output image from a CD-G disc from being reproduced on the monitor screen due to the disappearance.

[0009]

In order to solve the above-mentioned problems, the present invention provides a CD-ROM having a recording area for audio data and a recording area for graphic data related to the audio data.
In a CD-G player driven by a battery, which has a superimpose function capable of inputting a video signal from an external device and synthesizing with the graphic data during reproduction of each data from the G disc, When the storage state of the battery or the input state of the video signal is detected during the reproduction of each data and the operation of the superimpose function, and it is detected that the storage amount of the battery is equal to or less than a predetermined value. Alternatively, when it is detected that the input of the video signal is stopped, the operation of the superimpose function is stopped.

[0010]

According to the control method of the CD-G player of the present invention, when it is detected that the charged amount of the battery becomes less than a predetermined value, the video signal from the external device is input and the CD is input.
-To prevent the viewer from feeling uncomfortable due to the distorted moving image on the screen of the CRT monitor by stopping the operation of the superimpose function that synthesizes and reproduces the graphic data from the G disc. You can In addition, when it is detected that the video signal input terminal is pulled out from the jack of the CD-G player and the video signal input is stopped from the external device, the superimpose function is activated again. By stopping the operation, only the output image of the graphic data from the CD-G disc can be reproduced on the monitor screen, and the graphic data from the CD-G disc is not reproduced together on the screen of the CRT monitor. Can be prevented.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing an embodiment of a control method of a CD-G player according to the present invention. Figure 1
It is a block diagram which shows the structure of the CD-G player to which the method of the present invention is applied.

The CD-G player of this embodiment shown in FIG. 1 reproduces and outputs audio data and graphic data from a CD-G disc (not shown). The operation key unit 1, the pickup 15, the pickup motor. 19, a disk rotation motor 21, a pickup mechanism / servo controller 23, a signal processing circuit 25, a graphic decoder IC 27, a CPU 29, a video signal input terminal 31, a superimposing circuit 33, a power supply block 35, and the like.

The operation key unit 1 includes keys for instructing basic operations such as a reproduction key 3, a stop key 5, a fast-forward key 7, a rewind key 9 and the like, and skips to the previous or next song (fast-forward) during playback of the song. Skip key 11, which is operated when rewinding
A direct music selection key 13 operated when designating and reproducing a desired music in a CD-G disc loaded in the device,
Provided with function keys such as a superimpose key 14 to be operated when superimposing the image of the graphic data reproduced from the CD-G disc on the image of the video signal input to the video signal input terminal 31. ing.

The pickup 15 reads the data recorded on the data recording surface of the CD-G disc.
It moves along a guide 17 extending in the radial direction of the D-G disc. The pickup motor 19 is the pickup 1
5 is moved along the guide 17, and the disc rotation motor 21 drives the CD-CD during reproduction, fast-forwarding and rewinding.
The G disk is rotated.

Pickup mechanism / servo controller 2
The reference numeral 3 indicates the time required to drive and control the pickup motor 19 according to the position of the reproduction track in the CD-G disc and to reproduce the recorded data of one track by the pickup 15 on the inner peripheral side of the CD-G disc. The servo speed is controlled by increasing / decreasing the number of rotations of the disk rotation motor 21 according to the position of the pickup 15 in the extending direction of the guide 17 so as to be equal on the outer peripheral side.

The signal processing circuit 25 separates the data read by the pickup 15 from the CD-G disc into audio data and subcodes, and further subcodes P and Q.
The channel and the R to W channels are separated. The graphic decoder IC 27 encodes the R to W channel graphic data of the subcodes separated by the signal processing circuit 25 into a composite video signal. The subcode P separated by the signal processing circuit 25,
The Q channel data is transmitted to the CPU 29 and stored in the memory.

The CPU 29 detects the operation of the play key 3, stop key 5, fast forward key 7, rewind key 9, skip key 11, direct music selection key 13, and superimpose key 14 of the operation key unit 1, and The drive command for the pickup motor 19 and the disk rotation motor 21 is output to the pickup mechanism / servo controller 23 according to the operation content, and the operation command is output to the graphic decoder IC 27 according to the operation content of each key. .

The video signal input terminal 31 is for inputting a video signal (video signal) for BGV (for background video) reproduced from a video tape, a video disc or the like, and the superimposing circuit 33 is The image of the video signal input to the video signal input terminal 31 is superimposed and combined with the image of the composite video signal encoded by the graphic decoder IC 27.

As shown in FIG. 2, the superimposing circuit 33 has a VIDEO input sensor 33a for detecting whether a VIDEO signal is input from the video signal input terminal 31.
Is provided, and the VIDEO input sensor 33a outputs the detection signal to the CPU 29. That is, as shown in FIG. 3, the VIDEO input sensor 33a outputs the detection signal L to the CPU 29 with a little delay from (a) when the video signal is input from the video signal input terminal 31.
(B), and when the video signal is no longer input (c), the non-detection signal H is immediately output to the CPU 29.

The power supply block 35 supplies electric power to the circuit of the CD-G player, and as shown in FIG. 2, the power supply block 35 has a LOW state for detecting the charged state.
A BATTERY detection circuit 35a is provided, and this LOW BATTERY detection circuit 35a is a LOW BA
When the TTERY state is detected, the detection signal is sent to the CPU2.
It is designed to output to 9. That is, as shown in FIG. 4, when the voltage from the power supply block 35 starts to drop and becomes lower than a predetermined value, the LOW BATTERY detection circuit 35.
a detects this and outputs a detection signal H to the CPU 29.

Next, the CD-G of this embodiment having the above-mentioned structure.
The operation of the player will be described. First, when a CD-G disc is loaded, the disc rotation motor 21 is driven to rotate the CD-G under the control of the pickup mechanism / servo controller 23 based on a command from the CPU 29, and the pickup motor 19 is driven to pick up the disc. 15 moves to the lead-in part of the CD-G disc. Then, by the pickup 15, the cue signal of the music recorded on the P channel of the subcode of the lead-in portion of the CD-G disc, the number of the music recorded on the Q channel of the subcode, the number of the music being reproduced. (Index), performance time from the beginning of the music, and accumulated performance time information are automatically reproduced, and the reproduction information is stored in a memory (not shown) in the CPU 29, and then a standby state is set.

When the reproduction key 3 of the operation key unit 1 is operated, the disc rotation motor 21 is driven by the control of the pickup mechanism / servo controller 23 based on the instruction of the CPU 29 to rotate the CD-G disc. .
In addition, the pickup motor 19 is driven to move the pickup 15 to a position past the lead-in portion of the CD-G disc, and the reproduction operation of the first recorded music by the pickup 15 from that position and an image accompanying the music. The playback operation of is performed.

When a BGV video signal is input to the superimpose circuit 33 via the video signal input terminal 31 while the superimpose key 14 is being operated, the graphic for the BGV image is displayed. A synthesis process is performed in which the images of the composite video signals encoded by the decoder IC 27 are superimposed, and the signals of the synthesized images are output to a CRT monitor (not shown).

One of the control methods for such a CD-G player will be described with reference to FIG.
When the LOW BATTERY detection circuit 35a detects the LOW BATTERY state of the power supply block 35 (YES in step S1 of FIG. 5, see FIG. 4), it is then determined whether the superimpose function is operating (S2). ). If it is determined that the superimpose function is operating, the superimposing function is stopped in response to a command from the CPU 29 (S
3). Next, it is determined whether the graphic data from the CD-G disc is being reproduced (PLAY) (S4). When the graphic data is being reproduced, it is next determined whether fast-forward or rewind (FF / REV) is being performed. (S5). If it is determined that fast-forwarding or rewinding is not in progress, the image output (subcode output) from the CD-G disc is set on the screen of the CRT monitor (S6). By implementing the control method of the CD-G player in this manner, it is possible to prevent the disturbance of a moving image due to a video signal from the outside from appearing on the screen of the CRT monitor, and give a feeling of strangeness to the person who views the screen of the CRT monitor. Can be prevented.

When it is determined in step S4 in FIG. 5 that the player is not in the PLAY state (NO), the subcode output does not come from the CD-G disc, so that only a single color such as BLUE (blue) is output from the monitor television. Set on screen (S
7). In this case, it goes without saying that any single color other than BLUE may be set. When it is determined in step S5 that FF / REV is being performed, the same processing is performed (S7).

Next, another control method of the CD-G player will be described with reference to FIG. First, it is determined whether the superimpose function is operating (step S in FIG. 6).
1), VID when it is determined that the function is operating
The EO input sensor 33a determines whether the video signal detection signal L is input to the CPU 29 (S2). If the connection terminal of the cord from the external device for inputting the video signal is pulled out from the jack of the CD-G player, the VIDEO input sensor 33a.
Outputs a non-detection signal H to the CPU 29, so NO is determined in S2. In this case, the operation of the superimpose function is stopped by a command from the CPU 29 (S3).

Next, it is judged whether or not the graphic data from the CD-G disc is being reproduced (PLAY) (S4). When it is during the PLAY, fast forward or rewind (FF / R) is performed next.
It is determined whether or not it is in EV) (S5). When it is determined that the FF / REV is not being performed, the subcode output from the CD-G disc is set on the screen of the CRT monitor (S6). By implementing the control method of the CD-G player in this way, only the output image from the CD-G disc can be reproduced on the screen of the monitor, and not only the moving image by the superimpose function but also the CD-G. It is possible to prevent a situation where the output image from the disc is not reproduced on the screen of the monitor together.

When it is determined in step S4 of FIG. 6 that the player is not in the PLAY state (NO), and when it is determined in step S5 that the FF / REV is being performed (YES).
Is processed in the same manner as in the case of the first control method (FIG. 5).
S7 of FIG. 6, S7 of FIG. 6).

[0029]

As described above, according to the present invention, since the amount of stored electricity in the battery is reduced, a moving image synthesized by inputting a video signal by the superimposing function is disturbed, or by the superimposing function. When the input video signal suddenly disappears, the CD-G
It is possible to realize a control method of a CD-G player that prevents even an output image from a disc from being reproduced on a monitor screen.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a CD-G player to which the method of the present invention is applied.

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

FIG. 3 is a time chart showing a relationship between a video signal input to a video signal input terminal 31 and a video detection signal for detecting the video signal.

FIG. 4 is a diagram showing the voltage supplied by the power supply block 35 and LOW
FIG. 7 is a correlation diagram showing a relationship with a detection signal output from the ATTERY detection circuit 35a.

FIG. 5 is a flowchart for explaining one of control methods for a CD-G player according to the present invention.

FIG. 6 is a flowchart for explaining another control method of the CD-G player according to the present invention.

[Explanation of symbols]

 1 Operation Key Section 3 Play Key 5 Stop Key 7 Fast Forward Key 9 Rewind Key 11 Skip Key 13 Direct Music Selection Key 15 Pickup 17 Guide 19 Pickup Motor 21 Disk Rotation Motor 23 Pickup Mechanical / Servo Controller 25 Signal Processing Circuit 27 Graphic Decoder IC 29 CPU 31 Video signal input terminal 33 Superimpose circuit 33a VIDEO input sensor 35 Power supply block 35a LOW BATTERY detection circuit

Claims (1)

[Claims] 1. A CD having a recording area for audio data and a recording area for graphic data related to the audio data.
In a CD-G player driven by a battery, which has a superimpose function capable of inputting a video signal from an external device and synthesizing with the graphic data during reproduction of each data from the G disc. During the reproduction of each data and the operation of the superimpose function, the storage state of the battery or the input state of the video signal is detected, and it is detected that the storage amount of the battery is equal to or less than a predetermined value. In this case, or when it is detected that the input of the video signal is stopped, the operation of the superimpose function is stopped, and the control method of the CD-G player.