JPH082851Y2 - Audio signal playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is an audio system comprising two or more kinds of audio signal reproducing devices and an amplifier for selecting one of the audio signal reproducing devices and amplifying the reproduced audio signal. More specifically, the present invention relates to an audio signal reproducing device capable of randomly selecting an audio signal reproducing device connected to a reproducing song and an amplifier.

(Background of the Invention) In an audio signal reproducing apparatus, there was no such thing as randomly selecting an audio signal reproducing device connected to a reproducing song and an amplifier when the amplifier output is used as a background measic.

However, when the playback output is used as the background music, it is desirable that the randomly selected playback songs as described above be transmitted continuously.

(Object of the Invention) The present invention has been conceived in view of the above, and provides an audio signal reproducing device capable of reproducing an audio signal by randomly selecting a reproduction song and a audio signal reproducing device. The purpose is to provide.

(Structure and Operation of Device) As shown in FIG. 1, the present invention includes a plurality of audio signal reproducing devices 50, an amplifying means 60, a random selection instructing means 70, and a control means.
Equipped with 80 and 90. FIG. 1 shows a case where the plurality of audio signal reproducing devices 50 comprises a record player 51, a digital audio disc player 52, and a cassette tape deck 53. The amplifying means 60 includes an amplifier main body 61, an audio signal reproducing device 50, that is, a record player 51 and a digital audio disc player 52.
And a selection means 62 for selecting one of the audio signal output terminals of the cassette tape deck 53 and for guiding the reproduced audio signal from the selected audio signal output terminal to the amplifier main body 61. Therefore, the selection means 62
The reproduced audio signal from the audio signal output terminal selected by is amplified by the amplifier main body 61.

Upon receiving the random selection instruction from the random selection instruction means 70, the control means 80 controls the selection means 62 to randomly select one of the audio signal output terminals through the selection means 62, and to select the audio signal output terminal. The audio signal reproducing device for outputting the output to the audio signal output terminal selected by the means 62 is selected, and the selected audio signal reproducing device is driven to perform the reproducing operation.

Further, the control means 80 is a control means 90 composed of control means 91 to 93 corresponding to each of the audio signal reproducing devices 50.
In cooperation with the control means 80, under the control of the control means 90 based on the control of the control means 80, the reproduction music by the record player 51, the digital audio disc player 52 and the cassette tape deck 53 is randomly selected, and the control means 80 By driving the audio signal reproducing device selected by, the randomly selected song is reproduced, and the audio signal reproducing device selected by the control means 80 is selected immediately before during reproduction by the driving audio signal reproducing device. The selected audio signal reproducing device is randomly selected to wait until the audio signal reproducing device selected immediately before is selected.

Therefore, the control means 80 and 90 are functionally first to first.
It corresponds to the fourth control means.

As a result, one of the plurality of audio signal reproduction devices 50 is randomly selected by the random selection instruction by the random selection instruction means 70, and is randomly selected by the randomly selected audio signal reproduction device. The reproduced music piece thus reproduced is reproduced, and the reproduced audio signal of the reproduced music piece is guided to the amplifier main body 61 via the selecting means 62 and amplified.

Therefore, it is completely unknown what the audio signal reproducing device to be controlled in the reproducing state next and the music reproduced in the audio signal reproducing device in the reproducing state. Therefore, it is suitable when the reproduction output is used as the background music.

In addition, during playback of a playback song on a randomly selected audio signal playback device, the playback song selected by the previously selected audio signal playback device was randomly selected, and was selected immediately before. It is kept waiting until the audio signal reproducing device is selected. As a result, when the audio signal reproducing device selected immediately before is selected, the reproduced music is already randomly selected, and the reproduced sound is substantially continuously transmitted. .

(Embodiment of the Invention) Hereinafter, the present invention will be described with reference to an embodiment.

FIG. 2 is a block diagram showing a configuration of an embodiment of the present invention. The audio signal reproducing apparatus of this embodiment exemplifies a case where a record player, a digital audio disc player and a cassette tape deck are used as audio signal reproducing equipment. ing.

The amplifier 1 includes an amplifier body 2, an input selector switch 3 for switching the input signal source, a random selection instruction switch 4 for instructing to randomly select the input signal source via the input selector switch 3, and a random selection instruction stop. A random selection stop instruction switch 5 for instructing, a light emitting diode 6 _{-1 to} 6 _-9 corresponding to the input signal source and indicating the selected input signal source, and a microcomputer 7. Light emitting diode 6 _-1
~ 6 _-3 is for record player, light emitting diode 6 _-4 ~ 6 _-6
Corresponds to a digital audio disc player, and the light emitting diodes 6 _{-7 to} 6 _-9 correspond to a cassette tape deck. The input changeover switch 3 is configured so that the input signal source can be selected by the output of the microcomputer 7, and the selected contact position signal is the microcomputer 7
Has been entered. The microcomputer 7 is essentially a CP
U7 _-1, ROM 7 _-2, RAM 7 stores data such as _-3, the input ports _7-4, provided with an output port 7 _-5, random selection indication to the input port _7-4 switch programmed to store the 4, the output of the random selection stop instruction switch 5 and the contact position signal switched by the input selector switch 3 are input, and the output port 7 _-5 outputs the contact selector position signal to the input selector switch 3. In addition to the above configuration, the microcomputer 7 can communicate with the microcomputer 27 that controls the record player 21, the microcomputer 34 that controls the digital audio disc player 31, and the microcomputer 47 that controls the cassette tape deck 41. Configured.

The record player 21 includes a music interval detection sensor 22 built in a tone arm, a waveform shaping circuit 23 for waveform shaping the output of the music interval detection sensor 22, a playback instruction switch 24 for instructing start and stop of playback, and a tone. A tone arm position detection sensor 25 that generates a pulse corresponding to the arm movement distance, a waveform shaping circuit 26 that waveform-shapes the output of the tone arm position detection sensor 25, and a microcomputer 27 are provided. The output of the waveform-shaped inter-track detection sensor 22 and the output of the waveform-shaped tone arm position detection sensor 25 store the number of recorded music pieces in the record board, the start position and the end position of the recorded music pieces, and the reproduction instruction switch 24 In response to the output of the record reproduction, stop, and waveform-formed arm position detection sensor 25, the microcomputer 27 can reproduce and stop the music at the specified position, that is, the music of the specified number.
It is configured so that it can be automatically controlled by. Furthermore, it is configured so that the reproduction music can be selected at random by the control of the microcomputer 27.

The digital audio disc player 31 has a reproduction instruction switch 32 for instructing the start and stop of reproduction, a detection signal processing circuit 33 for picking up information from the digital audio disc, processing the signal, and outputting it as an analog reproduction signal, and a microcomputer 34. The number of songs recorded on the digital audio disc, the start position and the end position of each song are stored, and the playback of the designated song, that is, the song of the designated number, and the stop are automatically controlled by the microcomputer 34. It is configured to be possible. Furthermore, the reproduction music can be selected at random by the control of the microcomputer 34.

The cassette tape deck 41 includes a reproduction instruction switch 42 for instructing start and stop of reproduction and a recording / reproducing magnetic head 43.
A recording / playback amplifier 44 including an equalizer amplifier that receives the output of the recording / playback magnetic head 43; and a clipping amplifier 45 that receives the output of the equalizer amplifier.
A mechanism control circuit 46 and a microcomputer 47 are provided,
Select a song stored on the cassette tape and follow the instructions from the playback instruction switch 42 to the microcomputer 47.
By the control of 1, the reproduction and the stop of the selected song are automatically enabled. Furthermore, by the control of the microcomputer 47, it is possible to randomly select a reproduced music piece within a predetermined number of recorded music pieces before and after the traveling stop position of the cassette tape.

Here, the amplifier main body 2 corresponds to the amplification means 61, the input changeover switch 3 corresponds to the selection means 62, the random selection instruction switch 4 corresponds to the random selection instruction means 70, and the microcomputer 7
Corresponds to the control means 80, and the microcomputers 27, 34 and 47 correspond to the control means 91, 92 and 93.

The operation of the embodiment of the present invention constructed as above will be described with reference to the flow chart of FIG.

 First, the operation of the amplifier 1 will be described.

Program is started by power-on, RAM 7 initialization including clear of the contents of _-3 is performed, followed by RAM 7 storage area in the _-3 (R ₁₁₎ to set the counter at a fixed frequency of the pulse, for example, a microcomputer The frequency division pulse of the oscillator output which is the operation reference of 7 is added every time the pulse is generated, and counting is performed (step a). Following step a, in the amplifier 1, the output terminal of the audio reproducing device, in this example, the audio signal output terminal of the record player 21,
If a normal selection instruction for selecting one terminal from the audio signal output terminal of the digital audio disc player 31 or the reproduction output terminal of the cassette tape deck 41 is made, the selection according to the instruction is made and the reproduction output is amplified. Done. Since this is the same as the conventional case and is not directly related to the present invention, its explanation is omitted. When the above-mentioned normal selection instruction is not issued, it is checked whether the random selection instruction switch 4 is turned on, that is, whether the random selection instruction is issued (step b).

When the random selection instruction is given in step b, the microcomputer 7 outputs a random music selection instruction signal to the audio reproducing device (step c). The operation of the audio reproducing device which receives the random song selection instruction in step c will be described later. After step c, the count value of the counter provided in the storage area (R ₁₁ ) is read, and the code corresponding to the randomly selected audio reproducing device is calculated and stored in the storage area (R ₁₂ ) in RAM 7 _-3 . (Step d). The storage contents in the storage area (R ₁₂ ) in step d correspond to the selected audio reproducing device, and this selection is made at random.
Emitting diode 6 _-1 to 6 _-4 after step d positioned in the outermost periphery of the light emitting diode groups, 6 _-7 6 _-9, 6 _-6, for example to light the light emitting diode 6 _-1, then the light emitting diode 6 _-1 to turn on the light-emitting diodes _6-4 with turns off the, ... in the same manner, is displayed as the locus of light emitting diode that emits light by sequentially blinking constitutes the repeating pattern (step e) . FIG. 4 schematically shows the blinking pattern. The display of step e is continued for 10 seconds (step f). Therefore step e
At f and f during this time, it is visually displayed as if a random selection of audio reproduction equipment is being made.

When the display in step e continues for 10 seconds, the input selector switch is controlled to switch to the contact position corresponding to the stored contents of the storage area (R ₁₂ ) and the light emitting diode is turned on following step f (step g). . Then, the storage content of the storage area (R ₁₂ ) is output to the audio playback device (step h), and it is checked whether the random music selection of the audio playback device corresponding to the output in step h is completed (step i). . At step d, an audio reproducing device is randomly selected, but at this time, the audio reproducing device is not output yet, and at the position corresponding to the audio reproducing device selected at step h, a display by a light emitting diode is made and a storage area ( Sending the stored contents of R ₁₂ ) informs the audio reproducing device that it has been selected or not. Further, when there is an output in step h, a music selection end signal is sent from the selected audio reproduction device when the selected music reproduction device finishes or was performing the music selection, and in step i, this music selection end signal is output. In response to this, it will be determined that the random song selection has ended.

When it is determined in step i that the music selection has ended, a reproduction instruction signal is output to the audio device, the selected audio device starts reproduction, and the audio signal output from the selected audio device is input via the input changeover switch 3. It is input to the amplifier main body 2, amplified, and then output (step j). When the music selection is completed and the stored content of the storage area (R ₁₂ ) is its own code, the reproduction may be started immediately without outputting the music selection end signal. Step j
Then, it is checked whether or not the random selection stop instruction switch 5 is turned on, that is, whether the random selection stop instruction is issued (step k). When the random selection stop instruction is not given in step k, it is checked following step k whether or not the reproduction stop instruction is given in the selected audio device (step l). When the reproduction stop instruction is not given in step l, it is checked whether or not the reproduction of the selected song is completed (step m). When the reproduction is not completed in step m, step j is followed by step j.
Is executed. Therefore, the random selection stop instruction is not given, and the playback stop instruction is not given on the selected audio device.
When the reproduction of the selected song is not completed, the reproduction is continued as it is.

When the random selection stop instruction is given in step k, a reproduction stop signal is output to the audio reproducing device following step k (step n). The audio playback device that receives the playback stop signal stops the song selection and playback. Following step n, the step following step a is executed. Further, when the stop instruction is given from the audio reproducing device selected in step l, the step next to step a is executed following step l. Therefore, when there is a random selection stop instruction or when there is a stop instruction from the audio playback device, the random selection loop is exited.

When it is detected in step m that the reproduction of the selected reproduction music has ended, the counter, that is, the count value of the storage area (R ₁₁ ) is read again following step m, and similarly to step d. A code corresponding to the audio player is calculated and stored in the storage area (R ₁₃ ) in RAM _{7 -3} (step p). Following step p in the memory area storing the contents of the (R ₁₂₎ and a storage area (R ₁₃₎
It is checked whether or not the stored contents match with the stored contents (step q), and if they match at step q, step p is executed again. When the two stored contents do not match in step q, the stored contents of the storage area (R ₁₃ ) are copied to the storage area (R ₁₂ ) (step r), and then, following step r, random selection is being performed as in step e. Is displayed (step s). The display in step s is 3
It is performed for 2 seconds (step t), and step g is executed after step t. As a result, steps p and q prevent the random selection in this case from subsequently selecting the same audio reproduction device as the audio reproduction device that was randomly selected immediately before. In step t, the period of the random selection display is set to 3 seconds, instead of 10 seconds in step f, because the random music selection instruction of the audio reproducing device has already been given in step c, and at this point, a new selection is made. This is because it is normal for audio playback devices that have already completed song selection.

By executing steps g, h, i, and j following step t, the audio signal output from the audio reproducing device selected in step r is input changeover switch 3
It is input to the amplifier main body 2 via the, and is amplified and output.

Next, a case (step d) of selecting an audio reproducing device corresponding to the stored contents of the storage area (R ₁₂ ) will be described with reference to FIG.

First, in the following description of FIG. 5, T is the storage content of the storage area (R ₁₄ ) provided in the RAM 7 _-3 , and R is the most significant bit (MSB) in the storage content of the storage area (R ₁₂ ). The stored contents are indicated by N, and N indicates the number of audio reproduction devices.

The count value of the storage area (R ₁₁₎ is copied to the storage area (R ₁₂₎ (Step d _1). Following step d ₁ , the MSB “0” or “1” of the storage area (R ₁₂ ) is determined (step d ₂ ).
If the MSB is "1" in step d ₂ added contents stored R in the stored content T of the storage area (R ₁₄₎ (step
d ₃ ), following step d ₃ , it is determined whether or not the stored content T of the storage area (R ₁₄ ) exceeds N (step
d ₄ ). Stored contents T in step d ₄ is subsequent to step d ₄ when exceeding the N arithmetical operations [T ← T-N] is made (step d _5). This calculation is continued until N ≧ T.

And if not, N <T Following step d ₄ in step d ₄ [(R ₁₂₎ ← T] is executed (Step d _6).
The stored content of the storage area (R ₁₂ ) when step d ₆ is executed shows the code of the selected audio reproducing device, which does not exceed the number N of audio reproducing devices.

When the MSB of the storage area (R ₁₂ ) is “0” in step d ₂ , the storage content T to the storage content R of the storage area (R ₁₄ ).
Is subtracted (step d ₇ ) and it is checked whether the result is negative or zero (step d ₈ ). Is negative or when zero after step d ₈ in step d ₈ [T ← N + T]
Is calculated (step d ₉ ). This calculation is repeated until T> 0. T> in step d ₈
When it is 0, the step d ₈ is followed by the step d ₆ [(R ₁₂ ).
← T] is executed. Therefore, the code of the selected audio reproducing device never becomes negative.

Also in step P, the same calculation is performed, and the code of the selected audio reproducing device is calculated.

Therefore, the stored contents of the storage area (R ₁₂ ) in steps d and r are related to the count value of the counter in the storage area (R ₁₁ ), and the audio reproduction device is selected at random.

Next, the operation of the audio reproducing device will be described by taking the cassette tape deck 41 as an example.

FIG. 6 is a flow chart for explaining the operation of the cassette tape deck 41.

When the power is turned on, the program starts and the computer
Initial settings are made including clearing the memory contents of the RAM that forms part of 47. Then, a counter set in a storage area (R ₄₁ ) in the RAM forming a part of the computer 47 counts pulses of a constant frequency every time a pulse is generated (step aa). Step aa is the same as step a. Next, it is checked whether or not a random song selection instruction is given from the microcomputer 7 (step a).
b). The random music selection instruction is performed by checking whether or not the random music selection instruction signal in step c is output. When the random song selection instruction is not given in step ab, it is checked whether or not the random selection stop instruction is given (step ac). The random selection stop instruction is given by checking whether or not the random selection stop signal is output in step n.

When the random selection stop instruction is given in step ac, the traveling of the cassette tape loaded in the cassette tape deck 41 is stopped (hereinafter referred to as the stop of the cassette tape deck 41) (step ad), and the next The step is executed. If no random selection stop instruction is given in step ac, the next step following step ad is executed.

When the random song selection instruction is given in step ab, the random song selection of the reproduced song is performed following step ab (step ae). Random selection of reproduced songs is performed in substantially the same manner as the flowchart shown in FIG. 5, and the stored contents of the storage area (R ₄₂ ) [corresponding to the storage area (R ₁₂ )] provided in the RAM of the microcomputer 47. In accordance with the above, the tune before or after the running stop position of the cassette tape is selected. In this case, recording / playback head 43, amplifier
This is done by detecting a non-recording portion from the output from the 44 and the clipping amplifier 45, and counting the number of the detected non-recording portion to run the cassette tape to the position of the selected reproduction music piece.

After step ae, it is checked whether or not the self, that is, the cassette tape deck 41 is selected, and it waits until the cassette tape deck 41 is selected (step af). The selection of the cassette tape deck 41 is checked by the stored contents of the storage area (R ₁₂ ) output in step h. That is, when the code signal is assigned to the cassette tape deck 41, the microcomputer 47 determines that the cassette tape deck 41 has been selected. When it is determined that the cassette tape deck 41 is selected in step af, if the selection of the reproduced song is completed, the process is continued from step af, and if the selection of the reproduced song is not completed, the selection is completed. An end signal is output (step ag). This music selection end signal is a signal for determining whether or not the music selection of the selected device is completed in step i.

Following step ag, it is checked whether or not a reproduction instruction signal for instructing reproduction is received (step ah). The reproduction instruction signal is output in step i. When the reproduction instruction signal is received, reproduction is performed following step ah. (Step ai). The reproduction in step ai is performed with the reproduction music randomly selected in step ae.
When the reproduction instruction signal has not yet arrived at step ah, the cassette tape deck 41 is stopped (step a
j), wait for the playback instruction signal to be input (step a
k). If it is determined in step ak that the reproduction instruction signal has been input, step ai is executed following step ak. After step ai, it is checked whether or not the reproduction stop switch 42 has been instructed to stop the reproduction (step al).

When the stop of the reproduction is not instructed in step al, it is checked whether or not the reproduction of the music being reproduced is finished (step am). When the reproduction is not finished at step am, step ai is executed after step am. Therefore, when the reproduction stop instruction is not issued in step al, the randomly selected reproduction music is reproduced until the end.

When the reproduction ends in step am, a reproduction end signal is output following step am (step an). The reproduction end signal is checked in step m. Following step an, the cassette tape deck 41 is stopped (step ao), and then step ab is executed.

Furthermore, when it is determined in step al that the reproduction stop instruction is issued, the deck stop signal is output following step al (step ap). The deck stop signal is checked in step al. Following step ap, the cassette tape deck 41 is stopped (step a
q), then step ab is executed.

Although the operation of the audio reproducing apparatus has been described above with the cassette tape deck 41 as a representative, the same applies to the case of the record player 21 and the digital audio disc player 31. The same is true if other audio playback equipment is provided.

Next, the light emitting diodes 6 _{-1 to} 6 _-9 will be described.

First, the light emitting diodes 6 _{-1 to} 6 _-3 are selected when the record player 21 is selected, and the light emitting diodes 6 _{-4 to} 6 _-6 are selected when the digital audio disc player 31 is selected.
Emitting diode 6 _-7 6 _-9 corresponds to the case where a cassette tape deck 41 is selected. Further, for example, when the cassette tape deck 41 is a double cassette tape deck capable of recording and reproducing respectively, the changeover switches 3 _-1 and 3 _-2 to which the input to the input changeover switch 3 is supplied are provided in the amplifier 1, for example. , The input selected by the change-over switch 3 _-1 and the change-over switch 3 _{-2 is} supplied to one cassette tape deck and the other cassette tape deck respectively to enable recording, and the amplified signal to be supplied to the amplification main body 2 In some cases, the recorded signal supplied to one cassette tape deck and the recorded signal supplied to the other cassette tape deck can be independently selected. In such a case, the light emitting diodes 6 _-1 , 6 _-4 and 6
_-7 indicates the selection input source by the input changeover switch 3, and the light emitting diodes 6 _-2 , 6 _-5 and 6 _-8 indicate the selection input source supplied to one cassette tape deck,
The light emitting diodes 6 _-3 , 6 _-6 and 6 _-9 are adapted to display the selected input source supplied to the other cassette tape deck. However, in the case of playback, the changeover switch 3
_-1 and 3 _-2 are unrelated, but the above is the reason why the number of light emitting diodes is large compared to the number of input sources.

The display of the light emitting diodes 6 _{-1 to} 6 _-9 in step e is as if the light emitting diodes randomly selected according to the stored contents of the RAM (R ₁₁ ) are turned on and off one by one. You may visually display that it is selecting at random. The display in step h is such that one row of light emitting diodes emit light corresponding to the selected input source to indicate the selected input source.

Further, a light emitting diode independent of the light emitting diodes 6 _{-1 to} 6 _-9 is provided, and the light emitting diode provided independently only in steps e and s is blinked so as to visually indicate that the random selection is being performed. You can also do it.

In the above-described embodiment of the present invention, one of the audio signal reproducing devices is randomly selected according to the count value of the counter for counting the pulses of the predetermined frequency, and the music reproduced by the audio signal reproducing device is selected. Although the case of randomly selecting one is illustrated, for example, a storage device such as a ROM in which the number code of the audio signal reproducing device selected in advance and the number code of the selected reproduction song are randomly stored is provided. It is also possible to read the stored contents from this storage device and select the audio signal reproducing device and reproducing music corresponding to the read number code.

(Effect of the Invention) As described above, according to the present invention, since the reproduced music is randomly selected and the audio signal reproducing device is selected at random, it is completely unknown what the next music is, and therefore the reproduced audio is reproduced. Very useful when the signal is used as background music.

In addition, during playback of a song played by the randomly selected audio signal playback device, the song selected by the previously selected audio signal playback device was randomly selected, and the song was selected immediately before. Since the audio signal reproducing device is on standby until it is next selected, when the previously selected audio signal reproducing device is selected, the reproduction music has already been selected, and the reproduction is substantially continuous. There is an effect that the reproduced sound is transmitted and the reproduction is continuously performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. FIG. 2 is a block diagram showing a configuration of one embodiment of the present invention. FIG. 3, FIG. 5 and FIG. 6 are flowcharts for explaining the operation of one embodiment of the present invention. FIG. 4 is a schematic diagram showing an example of light emission of a light emitting diode for visually indicating that selection is in progress. FIG. 7 is a block diagram showing an example of an input changeover switch. 50: plural audio signal reproducing devices, 60: amplification means, 61: amplifier body, 62 ... selection means, 70 ... random selection instruction means, 80 and 90 ... control means.

Claims (1)

[Scope of utility model registration request] 1. A plurality of audio signal reproducing devices, an amplifier main body and audio signal output terminals of the plurality of audio signal reproducing devices are connected to select one of them and output from the selected audio signal output terminal. The amplifier means having a selecting means for guiding the reproduced audio signal coming to the amplifier main body, the random selection instruction means, and the random selection instruction by the random selection instruction means, and one of the audio signal output terminals by the selection means. First control means for randomly selecting one, second control means for randomly selecting a music piece to be reproduced by the plurality of audio signal reproducing devices, and an audio signal output terminal selected by the first control means Select an audio signal playback device that outputs a playback signal from among multiple audio signal playback devices. A third control means for driving the audio signal reproduction device to reproduce the music selected by the second control means, and the audio signal reproduction device selected by the third control means, during reproduction. The second control means randomly selects a music piece to be reproduced in the audio signal reproducing device selected in (1), and waits until the audio signal reproducing device selected immediately before is selected by the third controlling means. 4. An audio signal reproducing apparatus comprising the control means of 4.