JPH056250B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has a plurality of mechanism parts, and a signal reproduced by a reproduction head placed on a first mechanism part is transferred to a second mechanism part. The present invention relates to a tape recorder that enables so-called dubbing operation in which recording is performed using a recording head.

Conventional Technology In recent years, this type of tape recorder has not only been used to simply dub from a recorded tape to another tape, but also to use an externally connected graphic equalizer to create the desired frequency characteristics during the dubbing process. More and more systems are being introduced that allow dubbing.

Problems to be Solved by the Invention However, in conventional tape recorders that allow dubbing via a graphic equalizer, if a tape recorded through a noise reduction means is dubbed via a graphic equalizer, noise will be generated when the tape is played back next time. Mismatching occurs with the reduction means.

To prevent this, when performing normal dubbing without going through a graphic equalizer,
Regardless of the state of the manual noise reduction command switch,
When the noise reduction command is canceled and dubbing is performed via a graphic equalizer, a graphic equalizer via selection switch is provided in addition to the dubbing operation selection switch, and the command from this switch The noise reduction means is set to a decode state, and the noise reduction means is operated in response to a command from a manual noise reduction command switch, so that a decoded output is output as a monitor output.

Furthermore, when performing normal dubbing that does not go through a graphic equalizer, the state before passing through the noise reduction means is added in case the tape recorded through the noise reduction means is played back on a tape recorder that does not have the noise reduction means. In order to restore the original state, it is necessary to configure the control means such as by providing a switch for canceling the noise reduction means operation during normal dubbing operation in addition to the graphic equalizer selection switch, and making sure that the noise reduction command is not forcibly canceled. Therefore, a large number of switches are required, which increases the cost and has many disadvantages such as a complicated configuration.

In view of the above problems, the present invention makes sure that the noise reduction means is in the decoding state during the dubbing operation, and allows the noise reduction means to be selected between the operating state and the non-operating state using a manual noise reduction command switch. During dubbing, by creating the same state as when dubbing via a conventional graphic equalizer, the recorded tape can be passed through a graphic equalizer through a noise reduction means without providing an equalizer selection switch. To provide a tape recorder which enables dubbing and also enables normal dubbing operation without going through a graphic equalizer.

Means for Solving the Problems In order to solve the above-mentioned problems, the tape recorder of the present invention includes a first mechanism section that enters a playback operation state during a dubbing operation, and a playback mechanism placed on the first mechanism section. a playback amplifier whose input is the output of the playback head; the output of the playback amplifier is used as the playback input, and the output of the input level adjustment means connected to the input terminal is used as the recording input to determine the playback operation state and the dubbing operation. The first command of the control means is used as an encode/decode command input, and the command from the manual noise reduction command switch is used to reduce noise. Noise reduction means receives a command input, and when the noise reduction command is applied to the noise reduction means and the encode command is applied, an encode output is output, and when a command to cancel the noise reduction command is applied, a through output is output. , when the decoding command is added, the recording output of the noise reduction means that outputs the through output is set as a first input, and the output of the input level adjustment means is set as a second input, regardless of the noise reduction command. and a first recording input switching means for switching the input in accordance with a second command of the control means that issues commands with different logic during dubbing operation and non-operation; the output from the noise reduction means as a third input;
a second recording input switch for switching the input according to a high-speed command of the control means that issues a constant-speed command or a high-speed command depending on whether the tape speed is constant speed or high speed during the dubbing operation, using the recording output of the fourth input; a recording amplifier which receives the output of the second recording input switching means; and a second mechanism part which receives the output of the recording amplifier and is placed in a recording operation state during the dubbing operation. When the noise reduction command is applied to the recording head and the noise reduction means, and when the decoding command is applied, a decode output is output, and a monitor output of the noise reduction means, which outputs a through output for commands other than the above, is outputted to a fifth monitor output. and the output of the input level adjusting means is the input of the sixth input level adjusting means.
A level display input switching means for switching the input according to the constant speed command of the control means, and a level display means receiving the output of the level display input switching means as an input.

Effects The present invention has the above-described structure, so that normal dubbing operations that do not go through a graphic equalizer can be performed only when the tape speed is higher than the normal speed (constant speed), and constant speed dubbing operations can be performed only when the tape speed is higher than the normal speed (constant speed). In other words, the dubbing operation is performed via the graphic equalizer.
When dubbing a tape recorded through a noise reduction means via a graphic equalizer, the noise reduction command is canceled regardless of the state of the manual noise reduction command switch. It is not necessary to provide a selection switch via the graphic equalizer, which allows the noise reduction means to be activated or deactivated based on commands from the switch, and it is possible to simplify the design of the control means. A function that allows dubbing operations can be added.

Embodiment A tape recorder according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a main part block diagram showing an embodiment of the tape recorder of the present invention.

In FIG. 1, reference numeral 7 denotes a control means that issues a command with the same logic during the playback operation state and the dubbing operation, and in other recording operation states, a first command that issues a command with a different logic from the above, and a first command that issues a command with a different logic from the above, and during the dubbing operation. A second command that issues a command with different logic when not in operation, and a constant speed command or high speed command output terminal that issues a constant speed command or a high speed command depending on whether the tape speed is constant or high during dubbing operation. have.

The noise reduction means 4 then controls the first noise reduction means 4 of the control means 7.
The command from the manual noise reduction command switch 8 is used as the encode and decode command input, and the noise reduction command is applied to the noise reduction means 4, and when the encode command is applied, an encode output is output, When a command to cancel the noise reduction command is added, a through output is output, and when a decoding command is added, the through output is output regardless of the noise reduction command. It has a monitor output terminal that outputs a decode output when a decode command is applied, and outputs a through output for commands other than the above.

Reference numeral 1 denotes a first mechanism section that enters a reproducing state during dubbing operation. A reproducing head 2 is mounted on this mechanism section 1, and the signal reproduced by the reproducing head 2 is transmitted via a reproducing amplifier 3 to a noise reduction means. The signal is inputted to the playback input terminal of the noise reduction means 4, and this signal is set as the playback input, and the signal inputted via the input level adjustment means 6 connected to the input terminal 5 is inputted to the recording input terminal of the noise reduction means 4. and use this as the recording input.

Further, the recording output of the noise reduction means 4 is used as a first input, and the output of the input level adjustment means 6 is used as a second input, and the control means 4 outputs different commands during dubbing operation and non-operation. A first recording input switching means 9 that switches the input according to the command of No. 2.
The output from the noise reduction means 4 is used as a third input, and the first recording output from the noise reduction means 4 is used as a fourth input to issue a constant speed command or a high speed command depending on whether the tape speed is constant or high during dubbing operation. The output of the second recording input switching means 10 for switching the input is input to the recording amplifier 11 in accordance with a high-speed command from the control means 4 issued.

Furthermore, the output of the recording amplifier 11 is applied to the recording head 13 mounted on the second mechanism section 12 which is in a recording state during a dubbing operation and is recorded.

Further, the monitor output is used as the fifth input, the output of the input level adjustment means 6 is used as the sixth input, and the output of the level display input switching means 14 which switches the input according to the constant speed command of the control means 4 is used as the input. The display means 15 is configured to display the recording level.

Note that 16 is an output terminal to which the monitor output of the noise reduction means 4 is connected.

According to the present embodiment configured as described above, in order to perform dubbing by creating an arbitrary frequency characteristic using the graphic equalizer 17 connected between the input terminal 5 and the output terminal 16, it is necessary to perform dubbing. A manual noise reduction command switch 8 is operated to determine whether or not to give a noise reduction command to the noise reduction means 4 depending on whether the recorded tape has been recorded through the noise reduction means or not.

In the following description, it is assumed that the recorded tape to be dubbed has been recorded through the noise reduction means 4. Therefore, the manual noise reduction command switch is set at a position that gives a command to the noise reduction means 4 to perform the noise reduction operation. In this state, when a decoding command is given to the noise reduction means 4 by the first command of the control means 7, the noise reduction means 4
is in the decoding state.

Therefore, the signal reproduced by the reproduction head 2 is applied as a reproduction input to the noise reduction means 4 via the reproduction amplifier 3, and is in the same signal state as when it does not pass through the noise reduction means 4, and is output as a monitor output to the output terminal 16. It comes out.

Then, it is applied to the input terminal 5 via the graphic equalizer 17, and after the level is adjusted by the input level adjustment means 6, the first recording input switching means 9
The signal selected and outputted by the second command of the control means 7 is applied as the second input of
is added as the third input of the recording input switching means 10, and is selected by the high speed command of the control means 7,
The signal is output and input to the recording amplifier 11.

Then, the signal amplified by the recording amplifier 11 is
Recording is performed on a tape by the recording head 13 placed on the second mechanism section 12 which is in a recording state during dubbing.

That is, dubbing is performed via a graphic equalizer.

Further, the level display input switching means 14 changes the input level adjusting means 6 according to the constant speed command from the control means 7.
The sixth input via is selected as an output and added as an input to the level display means 15, allowing the same signal as the signal input to the recording amplifier 11 to be displayed in level.

Next, a case will be described in which a dubbing operation is performed without going through the graphic equalizer 17.

At this time, the signal applied as the playback input to the noise reduction means 4 in the same manner as described above will be output as a recording output in the same state as the input state, regardless of the state of the manual noise reduction command switch 8. , is added as the fourth input of the second recording input switching means 10, selected by the high speed command of the control means 7, outputted and inputted to the recording amplifier 11.

Then, the dubbing operation is performed in the same manner as when dubbing is performed via the graphic equalizer described above.

According to this configuration, when dubbing via the graphic equalizer, the manual noise reduction command switch is operated and set to a position where no noise reduction command is given to the noise reduction means 4, and the graphic equalizer is 17 and put it in a flat or bypass state, dubbing can be performed in the same signal state as that of the reproduced signal input to the noise reduction means.

Next, FIG. 2 is a block diagram of the control means 7 in the main block diagram shown in FIG. 1.

In FIG. 2, 18 is a dubbing operation selection switch for selecting whether or not to perform a dubbing operation, and the +B power supply is connected to the common terminal C.
The terminal 18a is a tape speed selection switch 1 which will be described later.
The terminal 18b is connected to the common terminal 19c of 9, and the terminal 18b serves as the second command terminal, and also connects to the diode 2 of the encode/decode switching means 20, which will be described later.
The anode side of 1 is connected.

The tape speed selection switch 19 sets the tape speed at a constant speed (usually 4.8 cm/s) during dubbing operation.
or high speed (an integer multiple of the normal speed), a constant speed command is given from the terminal 19a side, and a high speed command is given from the terminal 19b side.

Further, reference numeral 22 denotes a recording/playback switching means, which supplies +B power via a switch 28 to the anode of the diode 23 of the encode/decode switching means 20 during recording operation, and +B power during playback operation.
It is designed to cut off the B power supply.

Further, encode/decode switching means 20
One end of the resistor 24 is connected to the +B power supply, and the other end of the resistor 24 is connected to the collector of the transistor 25. The emitter of the transistor 25 is grounded, and the base is connected to the cathodes of the diodes 21 and 23 via the resistor 26. The first command is applied from the collector of the transistor 25 via the resistor 27.

The operation of the control means 7 configured as above will be explained below.

When +B power is currently being supplied and the dubbing operation selection switch is operated to connect the dubbing operation position, that is, the common terminal 18c and terminal 18a, the +B power is applied to the common terminal 19c of the tape speed selection switch 19. is supplied to

In this state, operate the tape speed selection switch 19 to set the constant speed position (common terminal 19c and terminal 19
a is connected), +B power is given as a constant speed command, and the high speed position (common terminals 19c and 1
9b is connected), +B is used as a high speed command.
Power will be provided.

At this time, if the recording/reproducing switching means is in the reproducing operation state, no current flows to the base of the transistor 25, and the transistor 25 is in the OFF state.

Therefore, the potential of the +B power supply is given as the first command, and this is taken as the encode command.

Furthermore, when the recording/playback switching means enters the recording state, a base current flows from the +B power supply to the transistor 25 via the switch 28, the diode 23, and the resistor 26, and the transistor 25
It is in the ON state, and the collector potential becomes almost the ground potential. This is set as the encode command of the first command.

Next, when the dubbing operation selection switch 18 is set to the non-operating position, the common terminals 18c and 18b are connected and the +B power is applied as a second command, and at the same time, the +B power is applied via the diode 21 and the resistor 26.
A base current flows from the B power supply to the transistor 25, and the transistor 25 is turned on regardless of the setting state of the recording/playback switching means. Therefore, the recording state is the same as described above, and the first command is an encoding command.

Effects of the Invention As described above, the present invention includes a first mechanism section that enters a playback operation state during a dubbing operation, a playback head placed on the first mechanism section, and a playback device that receives the output of the playback head as an input. The output of the amplifier and the reproduction amplifier is used as the reproduction input, and the output of the input level adjustment means connected to the input terminal is used as the recording input, and the same logic command is issued during the reproduction operation state and dubbing operation, and the same logic command is issued during the reproduction operation state and the dubbing operation, and the recording operation other than the above is performed. In this state, the first command of the control means that issues a command with a different logic from the above is used as an encode/decode command input,
noise reduction means that receives a command from a manual noise reduction command switch as a noise reduction command input; when the noise reduction command is applied to the noise reduction means and the encode command is applied, an encoded output is output;
When a command to cancel the noise reduction command is added, a through output is output, and when the decoding command is added, the recording output of the noise reduction means, which outputs the through output, regardless of the noise reduction command, is set to the first recording output. a first input, and an output of the input level adjustment means as a second input, and a first input that switches the input according to a second command of the control means, which issues commands with different logic during dubbing operation and non-operation. recording input switching means, the output of the first recording input switching means as a third input, and the first recording output from the noise reduction means as a fourth input,
a second recording input switching means for switching the input according to a high speed command of the control means that issues a constant speed command or a high speed command depending on whether the tape speed is constant or high during the dubbing operation; and the second recording input switching means. a recording amplifier that receives the output of the recording amplifier as an input; a recording head that receives the output of the recording amplifier as an input and is placed on a second mechanism section that is in a recording operation state during the dubbing operation; When a noise reduction command is applied and the decoding command is applied, a decoded output is output, and when a command other than the above is applied, a through output is outputted.The monitor output of the noise reduction means is used as the fifth input, and the input level adjustment means By providing a level display input switching means which takes the output as a sixth input and switches the input according to the constant speed command of the control means, and a level display means which takes the output of the level display input switching means as an input, the graph can be displayed. When performing normal dubbing without going through a graphic equalizer, there is no need to provide a graphic equalizer selection switch.

Furthermore, a noise reduction means operation release command switch for returning the tape recorded through the noise reduction means to the state before passing through the noise reduction means can be eliminated, and the control means can be simplified in configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of an embodiment of the present invention.
FIG. 2 is a block diagram of the control means of FIG. 1. DESCRIPTION OF SYMBOLS 1...First mechanism part, 2...Reproduction head, 3...Regeneration amplifier, 4...Noise reduction means, 5
...Input terminal, 6...Input level adjustment means, 7...
...Control means, 8...Manual noise reduction command switch,
9...First recording input switching means, 10...Second
recording input switching means, 11...recording amplifier, 1
2...Second mechanism section, 13...Recording head, 14...Level display input switching means, 15...
... Level display means, 16 ... Output terminal, 17 ...
Graphic equalizer, 18...dubbing operation selection switch, 19...tape speed selection switch, 20...encoding/decoding switching means,
21, 23... Diode, 22... Recording/playback switching means, 24, 26, 27... Resistor, 25...
Transistor, 28... Recording/playback switching switch.

Claims (1)

[Scope of Claims] 1. A first mechanism section that enters a reproducing operation state during a dubbing operation, a reproducing head mounted on the first mechanism section, and a reproducing amplifier receiving the output of the reproducing head as an input. The output of the reproduction amplifier is used as a reproduction input, the output is decoded and output as a monitor output and a recording output, and the output of an input level adjustment means connected to the input terminal is used as a recording input,
a noise low frequency means that encodes the signal and outputs it as a recording output, and also outputs it as a monitor output; a manual noise reduction command switch that gives a noise reduction operation command to the noise low frequency means; and a manual noise reduction command switch that switches between encoding and decoding the first command. a control means for outputting a command, a second command as a switch switching command, and a third command as a constant speed command or a high speed command according to the tape speed; a first recording input switching means which is switched by a second command of the control means, with the output from the input level adjusting means as a second input; a second recording input switching means having an output as a third input and a signal from the recording output of the noise reduction means as a fourth input, which is switched by a third command (high speed command) from the control means; A level display that can be switched by a third command (constant speed command) of the control means, with the signal from the monitor output of the noise reduction means as a fifth input, and the output from the input level adjustment means as a sixth input. an input switching means, a level display means whose input is the output from the level display input switching means, a recording amplifier whose recording input is the output from the second recording input switching means, and a second mechanism unit. and a recording head for recording the output from the recording amplifier as a recording signal. 2. The control means issues commands of the same logic to the dubbing operation selection switch, the tape speed selection switch during the dubbing operation, and the recording or playback switching command means during the playback operation state and the dubbing operation, and in the recording operation state other than the above, 2. The tape recorder according to claim 1, further comprising encode/decode switching means for issuing commands with different logic.