JPS61137205A - Tape recorder - Google Patents

Abstract

PURPOSE:To attain recording proposed by an editor precisely by converting a tape signal recorded through a noise reducing circuit into a state kept before passing the signal through the noise reducing circuit and inputting the converted signal to a graphic equalizer at the time of edition of a signal through the graphic equalizer. CONSTITUTION:Since a decode command and a command corresponding to a manual noise reducing switch are applied to the noise reducing circuit 2 at the edition through the graphic equalizer, a decode output is generated from a monitor output. The output is inputted to an input terminal with an optional frequency characteristic through the graphic equalizer externally connected to an output terminal and the input signal and then inputted to the 2nd input of a record input switching circuit 5 through an input volume 8. Then, the input of the circuit 5 is switched and the input signal is allied to a recording equalizer circuit 6. The output of the input volume 8 is also applied to the 2nd input of a meter circuit input switching circuit 9, and then the input of the circuit 9 is switched on the basis of a command outputted from the 3rd output of a control circuit and the signal is inputted to a meter circuit 10.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape recorder with two mechanisms: editing and editing via a graphic equalizer.

BACKGROUND OF THE INVENTION In recent years, tape recorders have two mechanisms, and a method has been introduced in which a recorded tape is edited into another tape via an external graphic equalizer.

Problems that the invention aims to solveHowever, in conventional editing via a GraphInk equalizer, the output before going through the graphic equalizer is supplied to the meter. There was a problem that the level and the meter swing did not match.Also, when a tape recorded through a noise reduction circuit was edited via a graphic equalizer, mismatching occurred in the noise reduction circuit, making it impossible to edit as intended. there were.

In view of the problems mentioned above, the present invention makes the level input to the recording amplifier match the fluctuation of the meter by inputting the output after passing through the graphic equalizer to the meter circuit.
Also, when a tape recorded through a noise reduction circuit is collected via a graphic equalizer, the signal is decoded by the noise reduction circuit and converted to the state before passing through the noise reduction circuit. , to provide a tape recorder that allows editing as intended.

Means for Solving the Problems In order to solve the above problems, the tape recorder of the present invention issues the same logic commands during playback, editing operations, and editing operations via a graphic equalizer, and issues the same logic commands during recording states other than the above. The first output of a control circuit that issues a command with a logic different from that is used as an encode/decode command input,
During the editing operation, a command is issued outside the board and via the graphic equalizer. During the editing operation, a command is issued according to the manual noise reduction command switch. During the editing operation, a command is issued to cancel the noise reduction command. The second output of the control circuit is used as the noise reduction command input. A noise reduction circuit, and a recording output of the noise reduction circuit that produces an encode output when a noise reduction command is applied to the noise reduction circuit and an encode command is applied, and a through output when a command to cancel the noise reduction command is applied. a recording input switching circuit which takes the output of the input volume as the first input, takes the output of the input volume as the second input, and switches the input according to the third output of the control circuit that issues a command during editing operation via a graphic equalizer; and the noise reduction circuit. A noise reduction command is added to the circuit,
The monitor output of the noise reduction circuit, which produces a decode output when a decode command is applied and a through output when a command other than the above is applied, is used as the first input, and the output of the input volume is used as the second input.
and a meter circuit input switching circuit that switches the input according to the third output of the control circuit.

According to the above-described configuration, the noise reduction command is canceled during normal editing operation regardless of the state of the manual noise reduction switch, so that the through output comes out as the recording output of the noise reduction circuit and can be recorded as is. be done. Also, when editing via the graphic equalizer, the noise reduction circuit enters the decoding state by operating the manual noise reduction switch.
The decoded output appears on the monitor output. In other words, the signal recorded through the noise reduction circuit is converted to the state before passing through the noise reduction circuit, and is output to the output terminal.
A graphic equalizer is externally connected between the output terminal and the input terminal, and the signal is input to the input terminal with arbitrary frequency characteristics. The signal then passes through the input volume and recording input switching circuits and is then recorded.

Further, the signal input to the input terminal passes through the meter circuit input switching circuit and is input to the meter circuit, so that the meter swing matches the recording level.

Embodiment Hereinafter, a tape recorder according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of essential parts showing an embodiment of the tape recorder of the present invention. 1 is a control circuit that outputs the same logic command during playback, editing operation, and editing operation via the graphic equalizer, and a first output that outputs a different logic from the above in recording states other than the above, and a first output that outputs a different logic from the above during editing operation via the graphic equalizer. It issues a command according to the manual noise reduction command switch, and has a second output that issues a command to cancel the noise reduction command during an editing operation, and a third output that issues an instruction during an editing operation via the graphic eraser. 2 is a noise reduction circuit that removes noise (1i) from the control circuit 1;
- It has a recording output that outputs an encode output when a reduction command is added and an encode command is added, and a through output definition when a command to cancel the noise reduction command is added, and decoded when a noise reduction command is added and a decode command is added. It also has a monitor output that outputs a through output for commands other than those mentioned above. 3 is a first mechanism in which the signal recorded on the tape is applied to the reproduction input of the noise reduction circuit 2 through the reproduction equalizer circuit 4.

In the editing state, as mentioned above, the noise reduction circuit 2 is sent from the second output of the control circuit 1 to the noise reduction circuit 2. A through output comes out as the recording output.Then, that signal is applied to the first input of the recording input switching circuit 5,
The command from the third output of the control circuit 1 is input to the recording equalizer circuit 6 and further input to the head of the second mechanism 7 for editing.

Furthermore, during editing via the GraphInk equalizer, a decode command and a command corresponding to the manual noise reduction switch are added to the noise reduction circuit 2, so that a decode output is output to the monitor output.

Next, the signal is input to the input terminal with arbitrary frequency characteristics by a graphic equalizer externally connected to the output terminal and the input terminal. Further, the signal is inputted to the second input of the recording input switching circuit 5 through the input volume T8.

This time, since the command for editing via the graphic equalizer is issued from the third output of the control circuit 1, the input of the recording input switching circuit 5 is switched and similarly applied to the recording equalizer circuit 6. Further, the output of the input volume 8 is applied to the second input of the meter circuit input switching circuit 9, and the input of the meter circuit input switching circuit 9 is switched by the command of the third output of the control circuit 1 as described above. 10
A signal is input to

As described above, according to this embodiment, the same logic applies during playback, editing, and editing via the graphic equalizer!
The first output of the control circuit 1 is used as an input for encoding and decoding commands, and during non-editing operations and editing via the GraphInk equalizer, The control circuit 1 issues a command according to the manual noise reduction command switch, and issues a command to cancel the one-sound reduction command during editing operation.
Noise reduction circuit 2 whose second output is used as a noise reduction command input
When a noise reduction command is applied to the noise reduction circuit 2 and an encode command is applied, an encode output is generated, and when a command to cancel the noise reduction command is applied, a through output is generated.The recording output of the noise reduction circuit 2 is The control circuit 1 takes the output of the input volume 8 as the second input, and issues a command during editing operation via the graphic equalizer.
a recording input switching circuit that switches the input according to the third output of the noise reduction circuit 2, and a noise reduction circuit that applies a noise reduction command to the noise reduction circuit 2, outputs a decode output when a decode command is applied, and outputs a through output when a command other than the above is applied. The monitor output of 2 is used as the first input, and the output of the input volume 8 is used as the second input.
, and a meter circuit input switching circuit 9 that switches the input according to the third output of the control circuit 1. Therefore, when editing via the graphic equalizer, by operating the manual noise reduction switch, the noise reduction circuit can be switched. The tape signal recorded through the tape is input to the graphic equalizer in its original state before passing through the noise reduction circuit, so it can be recorded exactly as the editor intended. Also, since the meter is configured to swing with the output of the graphic equalizer, the swing of the meter matches the recording level.

Next, FIG. 2 is a block diagram of the control circuit shown in FIG. 1. Reference numeral 11 is a microcomputer having terminals for issuing a recording/playback switching command, 2 editing commands, and a graphic equalizer editing command. The encode/decode switching circuit 12 receives the recording/playback switching command, the editing command,
In accordance with the editing command via the graphic equalizer, a command with the same logic is issued during playback, editing, and editing via the graphic equalizer, and a command with a different logic from the above is issued in other recording states. 13 is a noise reduction command circuit which outputs a voltage according to the position of the manual noise reduction command switch. Reference numeral 14 denotes a noise reduction command angle Tr removal circuit, which issues a command to cancel the command of the noise reduction command circuit 13 in accordance with the editing command of the microcomputer 11. Reference numeral 15 denotes a noise reduction command cancellation control circuit, which issues a command to stop the operation of the noise reduction command cancellation circuit 14 when an editing command via the graphic equalizer is added.

As described above, the encoding/decoding switching circuit 12, noise reduction command circuit 13, and editing of the microcomputer 11 issues encoding/decoding commands in accordance with the recording/playback switching command, editing command, and editing command via the graphic equalizer of the microcomputer 11. A noise reduction command cancellation circuit 14 that cancels the command from the noise reduction command circuit 13 in accordance with the command, and a noise reduction command cancellation circuit 14 in accordance with the editing command via the graphic equalizer of the microcomputer 11.
By providing a noise reduction command release control circuit 15 that controls the noise reduction command, it is possible to generate the commands necessary to realize the diagram shown in FIG.

Further, FIG. 3 shows a concrete implementation of the control circuit shown in FIG. 2. The noise reduction command circuit 13 includes a manual noise reduction command switch 16 and a resistor 17. Further, the noise reduction command canceling circuit 14 includes a transistor 18 and a resistor 1.
9, a noise reduction circuit/control circuit 15 is composed of a transistor 2o and a resistor 21. Also, the encode/decode switching circuit 12 includes transistors 22 and 23.
, diodes 24 and 25, and resistors 26 to 29.

The operation of the control circuit 1 configured above will be described below.

The recording/playback switching command terminal of the microcomputer 11 is IGH during playback, and is LOW during recording.The editing command terminal is HIGH during editing operation, and the editing command terminal via graphic equalizer is RICaH during editing via graphic equalizer. shall be.

When the manual noise reduction circuit 16 is activated, a voltage B1. B2
．． B3 is generated respectively. Here, when the voltage is B1, the first noise reduction circuit operates, when the voltage is B2, the second noise reduction circuit operates, and when the voltage is B3, the first noise reduction circuit operates. The second noise reduction circuit is adapted to cancel. Also, voltage B1. B2.
It is assumed that the relationship between B3 is B1>B2''A33.Next, during the editing operation, current flows to the base of the transistor 18 through the resistor 19, the transistor 18 is turned on, and the potential of the collector becomes B3, and the control The second output of circuit 1 becomes B3.Next, when editing via graphic equalizer operates, control circuit 1
The third output of becomes HIG) (and the base current flows through the resistor 21, turning on the transistor 20 and preventing the transistor 18 from turning on.
Therefore, when editing via the graphic equalizer, the voltage according to the operation of the manual noise reduction command switch 16 is outputted from the second output of the control circuit 1. Next, during playback, the recording/playback switching command terminal of the microcomputer 11 is at HIGH, the base current flows through the resistor 29, the transistor 22 becomes in the ○+q state, the collector current flows from the power supply B through the resistor 28, and the collector potential is It becomes B3. Therefore, the potential of the first output of the control circuit 1 becomes B3. Next, when recording, the transistor 22 is turned off.
Therefore, the potential of the first output of control circuit 1 id:B
It becomes 1. Next, when the editing state or the editing state via the graphic equalizer is entered, a current flows through the diode 24 or 25 and the resistor 26, turning the transistor 23 on, and MU: the resistor 28. A collector current flows through the resistor 27, and the potential of the first output of the control circuit 1 becomes B3.

As described above, the potential of B3 is generated at the first output of the control circuit 1 during town life, editing operation, and editing via a graphic equalizer, and the potential of B1 is generated during recording other than the above. In addition, to the second output of the control circuit 1, a voltage (B1.B2°B3) corresponding to the 0v1 operation of the manual noise reduction command switch is output during non-editing operations and during editing via the graphic equalizer, and during editing operations B3 is forcibly output. Also, the third output of control rjl path 1 is 1 (ICiM) only during editing operation via the graphic equalizer. Logic 3-jl command is issued, and in a recording state other than the above-: The first output of the control j/roll circuit is used as the encode/decode command input without issuing a command with a different logic, and during editing operation and via a graphic equalizer During editing operation, a command is issued according to the manual AWf sound reduction command switch, and during editing, a command is issued to cancel the noise reduction command. When a noise reduction command is added to the noise reduction circuit as a command input, and when an encode command is added to the noise reduction circuit, and when an encode command is added, the encode output is output, and when a command to remove the noise reduction command is added, a throughput is output. A first input is the recording output of the noise reduction circuit that outputs an output, a second input is the output of the input volume, and a third output of the control circuit that outputs a command during editing operation via a graphic equalizer is input. A noise reduction command is applied to the noise reduction circuit, and when a decode command is applied, a decode output is generated, and when a command other than the above is applied, a through output is generated.The monitor output of the noise reduction circuit is connected to a first input. By providing a meter circuit input switching circuit that takes the output of the input volume as the second input and switches the input according to the third output of the control circuit, a manual noise reduction switch can be operated when editing via the graphic equalizer. The tape signal recorded through the noise reduction circuit is converted to the state before passing through the noise reduction circuit and input to the graphic equalizer, so the recording can be made as the editor intended.Also, the output of the graphic equalizer can be used as a meter. Since the meter is configured to swing, the swing of the meter matches the recording level.

[Brief explanation of the drawing]

Fig. 1d is a block diagram of the main part of an embodiment of the present invention, Fig. 2 is a block diagram of the control circuit of Fig. 1, and Fig. 3 is a block diagram of the control circuit of Fig. 2.
It is a specific circuit diagram of the figure. 1. Control circuit, 2... Noise reduction circuit,
3...first mechanism, 4...llJ raw equalizer circuit/recording input switching circuit, 6...recording equalizer circuit, 7...second mechanism, 8.input volume, 9...・Meter circuit input switching circuit, 10
...Meter circuit, 11 ...Microcomputer, 12 ...Encode, decode switching circuit, 13
... Noise reduction command circuit, 14 ... Noise reduction command release circuit, 15 ... Noise reduction command angle + r division control circuit, 16 ... Manual noise reduction command switch, 17.19 −． 21.26, 27.28 Resistor, 18.20, 22.23... Transistor, 24
゜25 ・Diode.

Claims (2)

[Claims] (1) A first mechanism that enters a playback state during an editing operation, a playback equalizer circuit that receives the output of the head included in the first mechanism, and uses the output of the playback equalizer circuit as a playback input, and connects it to an input terminal. A control circuit that uses the output of a connected input volume as a recording input, issues the same logic command during playback, editing operation, and editing operation via a graphic equalizer, and issues a different logic instruction from the above in recording states other than the above. The first output is used as an encode/decode command input, and the second output of the control circuit issues a command according to the manual noise reduction command switch during editing via the graphic equalizer, and issues a command to cancel the noise reduction command during editing. A noise reduction circuit that inputs a noise reduction command, and a noise reduction circuit that receives a noise reduction command and outputs an encode output when an encode command is applied, and outputs a through output when a command to cancel the noise reduction command is added. a recording input switching circuit that takes a recording output of the circuit as a first input, takes the output of the input volume as a second input, and switches the input according to a third output of the control circuit that issues a command during editing operation via a graphic equalizer; a recording equalizer circuit that receives the output of the recording input switching circuit as an input; a head of a second mechanism that receives the output of the recording equalizer circuit as an input and enters a recording state during an editing operation; and a noise reduction command to the noise reduction circuit. The monitor output of the noise reduction circuit, which generates a decode output when a decode command is applied and a through output when a command other than the above is applied, is used as the first input, the output of the input volume is used as the second input, and the control A tape recorder comprising: a meter circuit input switching circuit that switches input according to a third output of the circuit; and a meter circuit whose input is the output of the input switching circuit. (2) The control circuit issues commands of the same logic during playback, editing, and editing via the graphic equalizer according to commands from the microcomputer, the recording/playback switching command terminal, the editing command terminal, and the editing command terminal via the graphic equalizer. an encode/decode switching circuit that issues a command with logic different from the above in recording states other than the above; a noise reduction command circuit that issues a command according to a manual noise reduction command switch; and a noise reduction command circuit that issues a command according to an editing command of the microcomputer. Claim 1 comprising: a noise reduction command cancellation circuit for forcibly canceling a circuit command; and a noise reduction command cancellation control circuit that controls the noise reduction command cancellation circuit in accordance with an editing command via a graphic equalizer of the microcomputer. The tape recorder described in item 1.