JPH0425626B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to an apparatus for forcibly canceling a reproduction operation of an information reproducing apparatus, and more particularly to an apparatus for forcibly canceling a reproduction operation of an information reproducing apparatus having a plurality of reproduction modes. BACKGROUND ART An information reproducing device such as a video disc player has a plurality of playback modes, including a paid playback mode, that is, a mode in which when money is inserted, the amount of information (number of songs) is played back according to the amount of money put in. has already been devised. Such conventional devices are mainly used as karaoke devices in restaurants, etc., and have a simple configuration in which, in paid playback mode, the power is turned on for a period of time corresponding to the amount of money input. . The following electronic devices have been developed to enable more advanced control than such conventional devices. In other words, this device includes an information reading and reproducing section that reads information from a recording medium and reproduces it, and an information reading and reproducing section that detects the amount of money inserted and reproduces the amount of information (number of songs) according to the detected amount. It consists of an amount detection section that supplies a control signal to the reading and reproducing section. In the paid playback mode, the information reading and playback section is enabled to perform a playback operation by a playback enable signal supplied from the amount detection section, and prohibited from playback by a playback prohibition signal supplied from the amount detection section. , and each time the reproduction of a series of information, ie, one song, is completed, an end signal is supplied to the amount detection unit, and in playback modes other than paid playback mode, the playback device is configured to operate independently of the amount detection unit. In addition, the amount detecting section stores a count value obtained by counting the number of coins inserted as a value representing the inserted amount, and supplies a reproducible signal to the information reading and reproducing section, and the information reading and reproducing section supplies the signal to the information reading and reproducing section. The count value is decreased by a predetermined value in response to the end signal, and when the count value reaches "O", a reproduction prohibition signal is supplied to the information reading and reproduction section. On the other hand, playback modes other than paid playback mode include normal playback mode, which is a mode for playing back movie software, etc., in which the entire recorded information on the disc is played back only once from beginning to end, and environmental video software, etc., are played back endlessly. There is a repeat play mode that keeps playing. For example, the user can specify a desired playback mode by operating a changeover switch such as a rotary switch provided in the information reading and playback section.
Therefore, in a restaurant or the like, movie software or environmental video software can be played back during times when there are few customers or when customers do not wish to enjoy karaoke. As described above, in a device having multiple playback modes including a paid playback mode, when money is inserted when the pay playback mode is specified, a playback operation enable signal is sent from the amount detection section and playback of the first song is started. If the changeover switch for specifying the playback mode is then switched intentionally or by mistake and the normal playback mode or repeat playback mode is specified, the end signal will no longer be sent from the information reading and playback section. In this case, the count representing the input amount would not decrease in the amount detection section, and the amount invested would not match the number of songs played, which would cause a disadvantage to restaurants and the like. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to forcibly stop the playback operation when the designated playback mode changes after the playback operation has started in an information playback device that has a plurality of playback modes including a paid playback mode. To provide a device for forcibly canceling a reproduction operation of an information reproducing device, which can prevent the inconvenience that the input amount and the number of reproduced songs do not match. A device for forcibly canceling a playback operation of an information playback device according to the present invention constantly generates mode data corresponding to a specified playback mode, stores this mode data at predetermined intervals, and stores it together with the constantly generated mode data. The system is configured to compare the mode data that has been set and issue a reproduction operation stop command when these two data do not match. Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, the movable contact of a mode setting switch 1 consisting of a rotary switch is grounded. The movable contacts of the mode setting switch 1 can be switched only by using a key, and cannot be operated at all times. The signals led to the fixed contacts a to g of the mode setting switch 1 are supplied to each part of an information reading and reproducing section (not shown), and at the same time become inputs Da to Dg of the encoder 2 as mode data generating means. The encoder 2 is configured to output, when one of the inputs Da to Dg becomes low level, binary encoded 3-bit data corresponding to the input that has become low level. Bits A, B, and C forming the data output from this encoder 2 are applied to each input terminal of a 3-bit latch circuit 3, and simultaneously applied to one input terminal of exclusive OR gates _G1 to _G3 . applied. A clock φ ₁ from a clock generator 4 is applied to the clock input terminal of the latch circuit 3 . The output data of the encoder ₂ is stored and held in the latch circuit 3 by the rising edge of the clock φ1. Outputs Q A , Q _B , respectively derived to the three output terminals of the latch circuit 3 and corresponding to each bit _A , B, C in the output data of the encoder 2
Q _C is applied to the other input terminal of each of exclusive OR gates G ₁ to _{G 3} . Each output of the exclusive OR gates _G1 to _G3 becomes three inputs to a gate _G4 having a NOR (Negative OR) function. this gate
The output of _G4 is applied to the D input terminal of the D-type flip-flop 5. A clock input terminal of the D-type flip-flop 5 is supplied with a clock _φ2 having a phase opposite to that of the clock _φ1 from the clock generator 4.
A low level reproduction operation stop command signal is output from the Q output terminal of the D-type flip-flop 5. In the above configuration, it is assumed that the output data of the encoder 2 changes as shown in a truth table such as the table on the next page in response to changes in the input signal.

【table】

[Table] Now, when clocks φ ₁ and φ ₂ as shown in FIGS. 2A and 2B are being output from the clock generator 4, the movable contact of the rotary switch 1 switches and the input state of the encoder 2 changes. When the reproduction mode changes from M ₁ to M ₂ , the output data of the encoder 2 changes as shown in C in the figure (time t ₁ ).
Then, the output data of the latch circuit 3, which stores and holds the output data of the encoder 2 at the rising edge of the clock _φ1 , is stored and held at the first rising edge of the clock _φ1 after the output data of the encoder 2 changes, as shown in FIG. (time t ₃ ), data corresponding to M ₁ changes to data corresponding to M ₂ .
Therefore, the values of corresponding bits between the output data of the encoder 2 and the output data of the latch circuit 3 do not match from the time the output data of the encoder ₂ changes until the first rise of the clock φ1. Therefore, the output of at least one of the exclusive OR gates _G1 to _G3 becomes high level. Then, the output of the gate _G4 becomes low level from time _t1 to time _t3 as shown in E of the figure. Here, when the output of gate _G4 is at a low level, the D-type flip-flop ₅ enters the reset state at the rise of the clock φ2, and when the output of the gate _G4 is at the high level, the D-type flip-flop 5 enters the reset state at the rise of the clock _φ2 . 5 is in the set state, then D
The Q output of the flip-flop 5 is as shown in FIG. That is, from the first rise of clock φ ₂ after the output of gate G ₄ goes low (time t ₂ ) to the first rise of clock φ ₂ after the output of gate G ₄ goes high. (time _t4 )
A low level signal is output from the Q output terminal of the D-type flip-flop 5 throughout the period. This low level signal is supplied to the control circuit of the information reproducing device as a reproduction operation stop command signal, and the reproduction operation is stopped. Therefore, for example, in paid playback mode, a playback enable signal enables a playback operation, a playback prohibition signal inhibits a playback operation, and an end signal is sent every time the playback of one song is completed. The information reading and reproducing section is configured to count the number of coins inserted, hold the obtained count value, send out a replayable signal, and decrease the count value by a predetermined value in response to an end signal. and the count value is “O”
In an information playback device comprising an amount detection section configured to send a playback prohibition signal when the amount of money is inserted, a playback operation enable signal is sent from the amount detection section when money is inserted when the paid playback mode is specified. is transmitted and playback of the first song is started, if the rotary switch is switched intentionally or erroneously and the normal playback mode or repeat playback mode is designated, the end signal is no longer sent out from the information reading and playback section. However, if the rotary switch is switched intentionally or by mistake after the first song has started playing, the playback operation stop command signal is output as described above and the playback operation is stopped, so the end signal is not sent and the amount is not detected. Even if the count value representing the input amount no longer decreases in the section, the input amount and the number of played songs will continue to match. Furthermore, since the data stored in the latch circuit 3 is undefined from immediately after the power is turned on until the first clock _φ1 is output, the output data of the latch circuit 3 and the output data of the encoder 2 do not match immediately after the power is turned on, and playback is interrupted. An operation stop command signal is output. However, information reproducing devices usually generate a reset signal for a predetermined period of time immediately after the power is turned on to prevent abnormal operations that may occur immediately after the power is turned on. There is no problem even if the operation stop command signal is output. Further, in the above embodiment, the encoder 2 with 8 inputs and 3 bits output was used as the mode data generating means, but the mode data generating means may have 4 inputs and 2 bits output, or 16 inputs and 4 bits output, depending on the type of playback mode. A bit output encoder may also be used. Furthermore, in the above embodiment, both the latch circuit 3 and the D-type flip-flop 5 are of the positive edge trigger type, and each operates in synchronization with two clocks having opposite phases.
These latch circuits 3 and D-type flip-flops 5
If one of them is a negative edge trigger type, a similar operation can be obtained with a single clock. Effects of the Invention As detailed above, the device for forcibly canceling the playback operation of the information playback device according to the present invention constantly generates mode data corresponding to the designated playback mode, stores this mode data at predetermined intervals, and constantly The system is configured to compare the generated mode data with the stored mode data and issue a playback operation stop command when these two data do not match, so the playback operation stop command is issued immediately after the specified playback mode changes. When the mode data that is constantly generated and the stored mode data no longer match, a reproduction operation stop command is issued and the reproduction operation can be stopped. Therefore, in the paid playback mode, the playback enable signal enables the playback operation, the playback prohibition signal prohibits the playback operation, and the end signal is sent every time the playback of one song is completed. The configured information reading and reproducing unit holds a count value representing the amount of money put in and sends out a replayable signal, and in response to the end signal, the count value is decreased by a predetermined value until the count value becomes "0". In an information reproducing device comprising an amount detection unit configured to send a reproduction prohibition signal when the amount of money is exceeded, when money is inserted and the amount detection unit outputs a reproduction operation enable signal when paid reproduction mode is specified. After the playback of the first song is started, the changeover switch for specifying the playback mode is switched intentionally or by mistake, and if the normal playback mode or repeat playback mode is specified, an end signal is sent from the information reading and playback section. It disappears. however,
After the playback of the first song has started, the changeover switch is switched intentionally or by mistake, and a playback operation stop command signal is output, and the playback operation is stopped.
Even if the end signal is not sent and the count representing the input amount does not decrease in the amount detection section, the input amount and the number of songs played will remain consistent, and the amount of input and the number of songs played will continue to match. It is possible to prevent the inconvenience that restaurants, etc. would be at a disadvantage if they were to disappear.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention, and FIG. 2 is a waveform diagram showing the operation of the device shown in FIG. Explanation of codes of main parts, 2...Encoder, 3
... Latch circuit, 5 ... D-type flip-flop,
G ₁ to _{G 3} ... exclusive OR gates.

Claims (1)

[Claims] 1 Mode data generation means 2 that constantly generates mode data corresponding to the specified playback mode
and storage means 3 for storing the mode data at predetermined intervals, and generating a mismatch detection signal when the mode data and the storage data of the storage means 3 are compared and the mode data and the storage data do not match. A playback operation forced stop device for an information playback device, which comprises comparing means G ₁ , G ₂ , G ₃ , G ₄ for detecting a discrepancy, and a command generation means 5 for issuing a playback stop command in response to the discrepancy detection signal.