JPS62239705A - Level adjuting device - Google Patents

Abstract

PURPOSE:To adjust respective signal levels of plural channels by one-dial opera tion by making a level adjustment corresponding to the rotation of a dial while holding a specific level difference by plural counter means and a memory means. CONSTITUTION:A pulse signal generated by a pulse generator 2 according to the rotation of the dial is supplied to counters 41-44 corresponding to plural channels selectively to adjust the levels of information signals of respective channels, channel by channel, independently. Further, level differences among the plural channels are stored in a memory 50 and pulse signals are supplied to the plural counters 41-44 to adjust the respective signal levels of the plural channels at the same time while holding the level differences among the plural channels with the storage contents of the memory 50 and the outputs of the counters 41-44.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a level adjustment device for adjusting the signal level of multiple channels of information signals in various electronic devices, and for example, a level adjustment device for adjusting the signal level of information signals of multiple channels in various electronic devices. Commonly used in tape recorders (VTRs), etc.

[1vX Essentials of the Invention] The present invention provides a level adjustment device for adjusting signal levels of information signals of multiple channels in various electronic devices such as video tape recorders (VTRs) that record and reproduce video signals and audio signals. By storing the level difference in the memory means, it is possible to adjust the signal level of each of the plurality of channels by operating one dial while maintaining the level difference.

[Conventional technology]

Generally, in electronic equipment that handles information signals of multiple channels, level adjusters are provided in a number corresponding to the number of channels in order to adjust the signal level of each channel. Note that conventionally, for example, the operation of adjusting the signal level of a certain channel to a predetermined predetermined level is performed by linear operation of the operation knob, and the operation of arbitrarily variable adjustment of the signal level of the channel is performed by rotating the aforementioned knob. In this way, a level adjusting device is also used in which the number of devices installed can be reduced by using a dual-purpose operating knob.

In addition, various electronic devices such as video tape recorders (VTRs) that record and play back video and audio signals, especially commercial electronic devices used at broadcasting stations, are becoming more multifunctional and multichannel. A large number of operation knobs and mode display members are arranged on the operation panel. Operators of the multi-functional, multi-channel electronic equipment for business use have to perform complex operations on one or more various operating knobs in order to obtain the operating state of a desired function.

[Problem that the invention seeks to solve]

By the way, as mentioned above, in the multi-functional, multi-channel business electronic equipment, a large number of operation knobs and mode display members are arranged on the operation panel in order to perform the functions. Operability is poor, and the operation panels mentioned above tend to become larger, so in order to achieve multi-function and multi-channel operation, it is important to secure space for the arrangement of operation knobs, etc. and to improve operability. It has become a challenge.

Therefore, the present invention makes it possible to individually adjust the level of information signals of multiple channels one channel at a time using a common operating member, and also to adjust the signal levels of multiple channels in conjunction with each other. The purpose of this invention is to provide a level adjustment device with a novel configuration and to improve the operability of multi-functional, multi-channel electronic equipment.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a level adjustment device for adjusting the signal level of information signals of a plurality of channels, which includes a pulse generator that generates a pulse signal in response to rotation of a dial, and a pulse generator that generates a pulse signal according to rotation of a dial. A plurality of counter means are provided correspondingly and are selectively supplied with the output from the pulse generator, and when the plurality of channels are selected, a level difference between the channels is detected, and this level difference signal is detected. The present invention is characterized in that the plurality of counter means and the memory means perform level adjustment in accordance with the rotation of the dial while maintaining a predetermined level difference.

[Effect]

In the level adjustment device according to the present invention, the level of the information signal of each several channels is adjusted by selectively supplying the pulse signal generated from the pulse generator to the counter means corresponding to the plurality of channels in accordance with the rotation of the dial. Adjust 1
This is carried out individually for each channel, and by storing the level difference between a plurality of channels in a memory means and supplying the pulse signal to a plurality of counter means, the contents stored in the memory means and each of the plurality of counter means are Through the output, the signal levels of the plurality of channels are simultaneously adjusted while maintaining the level difference between the plurality of channels.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the level adjustment device according to the present invention will be described in detail with reference to the drawings.

In the embodiments shown in FIGS. 1 to 6, the present invention is applied to a digital video tape recorder that records and reproduces four channels of audio signals along with video signals.

The digital video tape recorder of this embodiment is -70
The system controller 10 using a computer controls the operation and display of various modes, and as shown in the block diagram of FIG. Pulse signals from a pulse generator 2 that generates pulse signals and setting data from a switch group 20 for setting various modes are supplied to the control section 11 of the system controller 10.

When the control unit 11 receives setting data from the switch group 20 for setting various modes, it drives the mode display unit 30 according to the setting data, and pulses the dial 1 every time the eye position is rotated. An addition pulse or a subtraction pulse is formed from the pulse signal generated by the generator 2 according to the direction of the rotation operation, and this addition pulse or subtraction pulse is applied to the first to fourth reversible counters 41 specified by the setting data. , 42, 43, and 44.

Further, the first to fourth reversible counters 41, 42.
43 and 44 count the addition pulses or subtraction pulses, and send the counted output data to the arithmetic processing section 12, data comparison section 13, and conversion processing section 14 of the system controller 10 as level setting data for each audio signal channel. supplying.

The arithmetic processing section 12 receives the specified data when the control section 11 receives setting data for an operation mode in which level adjustment of a plurality of audio signal channels is performed at once using the switch group 20 for setting various modes. The setting level difference between each channel is calculated from each level setting data supplied from the first to fourth reversible counters 41, 42, 43, 44, and the inter-channel level difference data is stored in the memory 50. Further, the data comparison unit 13
The level difference data stored in the memory 50 is compared with the level difference data between the setting data of each channel supplied from the first to fourth reversible counters 41, 42, 43, 44, and the comparison output data is It is supplied to the conversion processing section 14. Furthermore, the conversion processing unit 14
The setting data of each channel supplied from the fourth reversible counter 41, 42, 43, 44 is converted into level display data and supplied to the signal level display section 60 of bar graph display, and the setting data of each channel is is converted into level control data in decibels displayed on the signal level display section 60 and supplied to the signal level control section 70.

In this embodiment, as shown in the external perspective view of FIG. 2, the front panel 101 of the video tape recorder main body 100 includes the dial 1 and a group of switches 20 for setting the various modes. many switches 21
．． 22. ... are arranged, as well as various display sections 31, 32... of the mode display section 30 and each bar graph display section 61, 61 of the signal level display section 60.
...is arranged.

In the embodiment configured as described above, the recording level of the first audio signal channel A1 is adjusted and set as follows.

First, when the recording level of the first audio signal channel A1 is set to a value specific to the device, as shown in the flowchart of FIG. 31, and if the left UNITY display section 31A is not lit,
Check the operating state of the mode setting switch 26 provided near the dial 1 by checking the lighting state of the light emitting diode built into the switch 26, and press the mode setting switch 26 to turn off the light emitting diode. Then, the first mode setting switch 21 is pressed. With this operation, the system controller l
The control unit 11 of O is configured to control the first audio signal channel A1.
The recording level of the first audio signal channel Al is set in the UNITY mode by applying a UNITY level to the conversion processing unit 14 and lighting up the UNITY display unit 3LA. Performs display control to show.

Further, when the first mode setting switch 21 is pressed again in the UNITY mode down, the UN I
When the TY mode is canceled, VAR uses a recording bell set arbitrarily between the J channel + that transmits the first audio.
Switch to IABLE mode. By pressing the first mode setting switch 21 again, the display section 31
, the UNITY display section 31A disappears and the VA on the right side disappears.
The RIABLE display section 31B lights up and the VARIABLE
The control unit 11
The display is controlled by

Note that the first to fourth mode setting switches 21 and 22
, 23 and 24, each recording level of the first to fourth audio signal channels can be switched to the UNITY mode and VARIAI3LE mode, respectively.

Furthermore, when changing the setting of the recording level used in the VARIABLE mode, first, as shown in the flowchart of FIG.
The operating state of the light emitting diode is confirmed by the lighting state of the built-in light emitting diode, and the mode setting switch 26 is pressed so that the light emitting diode lights up. When the light emitting diode built into the mode setting switch 26 is lit, the control unit 11 receives a pulse signal generated by the pulse generator 2 in response to the rotation of the dial l.

Next, the first to fourth mote setting switches 21.22
, 23 and 24 to specify the audio signal channel whose recording level setting is to be changed. The control section 11 includes first to fourth mode setting switches 21 and 2.
Display control for indicating the designated channel is performed by selectively lighting up the channel display light emitting diodes built in the channels 2, 23, and 24 in accordance with the designated channel.

In addition, the first to fourth mode setting switches 21 and 22
, 23. Check the channel for which you want to change the recording level setting based on the lighting status of the built-in light emitting diodes in 24. If a light emitting diode other than the desired channel is lit, turn on the mode setting switch for that channel. Press to turn off the light.

Then, by rotating the dial 1 in this state, the control section 11 generates an addition pulse or pulse signal corresponding to the direction of the rotation operation from the pulse signal generated by the pulse generator 2 for each unit rotation operation of the dial 1. A subtraction pulse is formed, and this addition pulse or subtraction pulse is sent to the first to fourth reversible counters 41 of a designated channel.
42°43.44 to increase or decrease the recording level of a designated channel. Then, the recording level that has been variably set at random is confirmed by the bar graph display on the signal level display section 60, and the first to fourth mode setting switches 2m 22, 23.2 of the designated channel are checked.
4 is pressed again to turn off the channel display light emitting diode, thereby completing the recording level setting change operation for any channel.

The above setting change operation is performed individually for each channel.

In addition, the first to fourth settings in the above-mentioned setting change operation process are
If multiple channels are designated by the channel designation operation using the mode setting switches 21, 22, 23 and 24, and the rotation of the dial 1 is performed, the recording levels of the designated multiple channels can be changed at the same time. be able to.

When the dial l is rotated with multiple channels designated in this manner, the control unit 11 adjusts the setting level difference between the designated multiple channels at the start of the setting change operation in this mode. The arithmetic processing unit 12 calculates and stores the inter-channel level difference data in the memory 50, and at the same time applies addition pulses or subtraction pulses to the first to fourth reversible counters 41, 42, 43, and 44 of specified plural channels. to simultaneously increase or decrease each recording level of the specified channels.

With this operation, the recording levels of all designated channels can be raised or decreased simultaneously by rotating the dial l until they reach the maximum or minimum. In addition, when returning to the original state, the inter-channel level difference data stored in the memory 50 is read out, and the data comparing section 13 compares the first to fourth reversible counters 4.
By comparing the level difference data between the setting data of each channel supplied from 1.42, 43.44, and controlling the operation of the conversion processing section 14, while maintaining the level difference between the channels, You can change the recording level for each channel.

If there is a channel that is not being used at this time, input a calibration signal to that channel and return the original value while checking this value on the signal level display section 60 or display panel 60. By returning to , it is possible to accurately restore the situation before narrowing down the signal level.

In addition, when the control section 11 accepts the operation of the calibration switch 25, the control section 11 switches to the bar graph display state of the conversion process. This results in
The signal level can be adjusted with high precision using the calibration signal.

Further, in this embodiment, the control section 11 of the system controller 10 switches the display contents of the display panel 60 to a plurality of pre-programmed display screens by operating the menu switch 27 and the numeric keypad switch 28, for example. As shown in FIG. 5, there is a display screen in which the audio No. 18 level display section 61, signal level display section 60, timer display section 62, and tape status display section 63 are laid out, and as shown in FIG. A display screen for editing work in which a reduced display section 64, a cue data display section 65, a timer display section 66, and a tape status display section 67 are laid out can be selectively displayed.

〔Effect of the invention〕

As is clear from the description of the embodiments above, in the level adjustment device according to the present invention, pulse signals generated from a pulse generator are selectively supplied to counter means corresponding to a plurality of channels in accordance with rotation of a dial. By doing so, it is possible to individually adjust the level of the information signals of several channels, one channel at a time, and to store the level difference between the plurality of channels in the memory means, and to compare the stored contents of the memory means with the above-mentioned plurality of counter means. Each signal level of a plurality of channels can be adjusted simultaneously by each output while maintaining the level difference between the plurality of channels. Therefore, in the present invention, by being applicable to electronic equipment, it is possible to share a large number of operation knobs, secure the arrangement space on the operation panel, and improve operability.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the main structure of an embodiment in which the present invention is applied to a video tape recorder, FIG. 2 is an external perspective view of the main body of the video tape recorder of this embodiment, and FIGS. FIG. 4 is a flowchart showing the operation of the above embodiment, and FIGS. 5 and 6 respectively show the contents of the display screen selectively displayed on the display panel provided on the video tape recorder main body in the above embodiment. FIG. 1...Dial 2...Pulse generator 10...
System controller 11...control unit 12...arithmetic processing unit 13...
Data comparison section 14...Conversion processing section 20...Sinch group 41.42.43.44...Counter 50...Memory 60...Signal level display section 70...Level control section

Claims (1)

[Scope of Claim] A level adjustment device for adjusting the signal level of information signals of a plurality of channels, comprising: a pulse generator that generates a pulse signal in response to rotation of a dial; a plurality of counter means to which pulse signals are selectively supplied from a pulse generator; and a memory means for detecting a level difference between channels when the plurality of channels are selected and storing this level difference signal. A level adjustment device, characterized in that the plurality of counter means and the memory means adjust the level according to the rotation of the dial while maintaining a predetermined level difference.