JPH0744409B2 - Level adjuster - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a level adjusting device for adjusting the signal levels of information signals of a plurality of channels in various electronic devices, for example, a video for recording and reproducing a video signal or an audio signal. It is applied to tape recorders (VTR).

[Outline of Invention]

The present invention relates to a level adjusting device for adjusting the signal levels of information signals of a plurality of channels in various electronic devices such as a video tape recorder (VTR) for recording / reproducing a video signal or an audio signal. By storing the above-mentioned level difference, it is possible to adjust each signal level of a plurality of channels by one dial operation while maintaining the level difference.

[Conventional technology]

Generally, in electronic devices that handle information signals of a plurality of channels, a number of level adjusters corresponding to the number of channels are used to adjust the signal level of each channel. Conventionally, for example, an operation of adjusting a signal level of a certain channel to a preset predetermined level is performed by a linear operation of an operation knob, and an operation of arbitrarily variably adjusting a signal level of the channel is performed by a rotating operation of the knob. In this way, the level adjusting device is also used so as to reduce the number of installations by also using the operation knob.

In addition, various electronic devices such as video tape recorders (VTRs) that record and reproduce video signals and audio signals, especially commercial electronic devices used in broadcasting stations, etc., are being developed with multiple functions and channels. Many operation knobs and mode display members are arranged on the operation panel. Then, the operator of the above-mentioned multi-functional, multi-channel electronic device for business use has complicatedly operated a single or a plurality of various operation knobs in order to obtain the operating state of the desired function.

[Problems to be solved by the invention]

By the way, in the multi-functional, multi-channel electronic device for business use as described above, a large number of operation knobs and mode display members are arranged on the operation panel in order to exert its functions. The operability is poor, and the operation panel tends to be large, and it is important to secure an arrangement space for operation knobs and improve the operability in order to increase the number of functions and the number of channels. Has become.

Therefore, according to the present invention, the level of the information signals of a large number of channels can be adjusted individually for each channel by the common operating member, and the signal levels of a plurality of channels can be adjusted in conjunction with each other. It is an object of the present invention to provide a level adjusting device having a new structure and to improve the operability of electronic devices having multiple functions and multiple channels.

[Means for solving problems]

In a level adjusting device for adjusting signal levels of information signals of a plurality of channels, a specifying means for specifying one or a plurality of channels for adjusting the signal levels of the information signals from the plurality of channels, and a pulse according to rotation of a dial. A pulse generating means for generating a signal and a plurality of counts provided corresponding to the plurality of channels, counting pulse signals selectively supplied from the pulse generating means, and outputting level setting data of each channel. Means, a control means for supplying the pulse signal from the pulse generating means to the counting means corresponding to one or a plurality of channels designated by the designating means, and a channel from each level setting data from the plurality of counting means. Calculation means for calculating the level difference between the channels and the inter-channel relay calculated by the calculation means. Storage means for storing Le difference data,
The calculating means includes: each level setting data from the plurality of counting means and adjusting means for adjusting the signal level of the information signal of the corresponding channel in accordance with the inter-channel level difference data stored in the storage means. , When a plurality of channels are designated by the designation means,
Calculate the level difference between the specified channels,
It is characterized in that the inter-channel level difference data is supplied to the storage means.

[Action]

In the level adjusting device according to the present invention, the pulse signal generated from the pulse generating means in response to the rotation of the dial is selectively supplied to the counting means corresponding to the channel designated by the designating means, whereby the plurality of channels are The signal level of each information signal is adjusted. Further, when a plurality of channels are designated by the designating means, a level difference between the plurality of channels is detected, the level difference data between the channels is stored in the storage means, and is generated from the pulse generating means according to the rotation of the dial. By selectively supplying the pulse signal to the counting means corresponding to the channel designated by the designating means, the signal level of each information signal of the plurality of channels is maintained in a state in which the level difference between the plurality of channels is held. Make adjustments at the same time.

〔Example〕

An embodiment of the level adjusting device according to the present invention will be described below in detail with reference to the drawings.

The embodiment shown in FIGS. 1 to 6 is an application of the present invention to a digital video tape recorder which records and reproduces 4-channel audio signals together with video signals.

The digital video tape recorder of this embodiment is configured such that operation control and display control in various modes are performed by a system controller 10 using a microcomputer, and the main configuration is shown in the block diagram of FIG. In addition, the pulse signal from the pulse generator 2 that generates a pulse signal according to the rotating operation of the dial 1 and the setting data by the switch group 20 for setting various modes are given to the control unit 11 of the system controller 10. Has become.

The control unit 11 includes a group of switches 20 for setting the various modes.
When the setting data is received, the mode display section 30 is driven according to the setting data, and the added pulse corresponding to the rotating operation direction is generated from the pulse signal generated by the pulse generator 2 for each unit rotating operation of the dial 1. Alternatively, a subtraction pulse is formed, and the addition pulse or the subtraction pulse is selectively supplied to the first to fourth reversible counters 41, 42, 43, 44 designated by the setting data.

In addition, the first to fourth reversible counters 41, 42, 43, 44
Counts the addition pulse or the subtraction pulse, and supplies the count output data to the arithmetic processing unit 12, the data comparison unit 13 and the conversion processing unit 14 of the system controller 10 as the level setting data of each audio signal channel. There is.

The arithmetic processing unit 12 stores the operation mode setting data for collectively adjusting the levels of a plurality of audio signal channels by the switch group 20 for setting various modes.
11 receives the set level difference between the designated channels, the first to fourth reversible counters 41, 42,
The level difference data between channels, which is calculated from the level setting data supplied from 43 and 44, is stored in the memory 50. Further, the data comparison unit 13 stores the level difference data stored in the memory 50 and the level difference data between the setting data of the respective channels supplied from the first to fourth reversible counters 41, 42, 43, 44. After comparison, comparison output data is supplied to the conversion processing unit 14. Further, the conversion processing unit 14 includes the first to fourth reversible counters 41, 42, 43, 4
Signal level display section for bar graph display by converting the setting data of each channel supplied from 4 to level display data
The setting data of each channel is converted into level control data in decibel units displayed on the signal level display unit 60 and supplied to the signal level control unit 70 while being supplied to the signal level control unit 70.

Here, in this embodiment, as shown in the external perspective view of FIG. 2, the dial 1 and the switch group 20 for setting various modes are formed on the front panel 101 of the video tape recorder body 100. Many switches 21,22, ...
, And various display sections 31, 32 of the mode display section 30 and bar graph display sections 61A, 61B of the signal level display section 60.

In the embodiment having the above-mentioned structure, the recording level of the first audio signal channel A ₁ is adjusted and set as follows.

First, when setting the recording level of the first audio signal channel A ₁ to a value peculiar to the device for use, as shown in the flowchart of FIG. 3, the first mode setting switch is used.
Check the display status of the display section 31 provided above the
If the UNITY display 31A is not lit, dial 1 above
Confirm the operating state of the mode setting switch 26 provided in the vicinity by the lighting state of the light emitting diode built in the switch 26, and press the mode setting switch 26 to turn off the light emitting diode, The first mode setting switch 21 is pressed. By this operation, the control section 11 of the system controller 10 gives UNITY level data for setting the recording level of the first audio signal channel A ₁ to a value peculiar to the device to the conversion processing section 14 and also makes the UNITY display section 31A. Is lit to perform display control indicating that the recording level of the first audio signal channel A ₁ is set in the UNITY mode.

Further, when the first mode setting switch 21 is pressed again in the UNITY mode state, the UNITY mode is released and the mode is switched to the VARIABLE mode in which the recording level arbitrarily set for the first audio signal channel A ₁ is used. . By pressing the first mode setting switch 21 again, in the display unit 31, the UNITY display unit 31A disappears and the VARIABLE display unit 31B on the right side lights up to indicate that the unit has switched to the VARIABLE mode. The display is controlled by the control unit 11.

The first to fourth mode setting switches 21, 22, 23, 2
By the operation of 4, the recording levels of the first to fourth audio signal channels can be switched between the UNITY mode and the VARIABLE mode.

Furthermore, when changing the setting of the recording level used in the VARIABLE mode, first confirm the operation state of the mode setting switch 26 by the lighting state of the built-in light emitting diode as shown in the flowchart of FIG. The mode setting switch 26 so that the light emitting diode lights up.
Press to operate. When the light emitting diode built in the mode setting switch 26 is lit, the dial 1
The control unit 11 receives the pulse signal generated by the pulse generator 2 in accordance with the rotating operation of.

Next, the first to fourth mode setting switches 21, 22, 23, 2
Press 4 to specify the audio signal channel for which you want to change the recording level setting. The control unit 11 has a first
Further, the channel display light emitting diodes respectively built in the fourth mode setting switches 21, 22, 23 and 24 are selectively turned on in accordance with the designated channel to perform display control indicating the designated channel.

In addition, the first to fourth mode setting switches 21, 22, 23, 2
Check the channel for which the recording level setting is changed by checking the lighting status of the built-in light emitting diodes in each of the four, and if the light emitting diodes other than the target channel are lighting, press the mode setting switch. To turn it off.

Then, by rotating the dial 1 in this state, the control unit 11 causes the pulse signal generated by the pulse generator 2 for each unit rotation operation of the dial 1 to be added pulse or The subtraction pulse is formed, and the addition pulse or the subtraction pulse is formed by the first to fourth reversible counters 41, 42, 4 of the designated channel.
It selectively supplies 3,44 to increase or decrease the recording level of the specified channel. Then, variably set arbitrarily and the recording level is confirmed by the bar graph display of the signal level display section 60, and the first to fourth mode setting switches 21, 22, 23, 24 of the designated channel are pressed again. By turning off the channel display light emitting diode, the recording level setting changing operation of an arbitrary channel is completed.

The setting change operation is individually performed for each channel.

In addition, the first to fourth steps in the above setting change operation process
Specify multiple channels by the channel setting operation with the mode setting switches 21, 22, 23, 24 of
If the rotation operation is performed, it is possible to simultaneously change each recording level for a plurality of designated channels.

When the dial 1 is rotated with the plurality of channels thus designated, the control unit 11 determines the set level difference between the plurality of channels designated at the start of the setting change operation in this mode. The level difference data between channels calculated by the arithmetic processing unit 12 is stored in the memory 50, and addition or subtraction pulses are applied to the first to fourth reversible counters 41, 42, 43, 44 of a plurality of designated channels. To simultaneously increase or decrease each recording level of the designated channel. By this operation, it is possible to simultaneously increase or decrease by rotating the dial 1 until the recording levels of all the designated channels become maximum or minimum. Further, when returning to the original state, the inter-channel level difference data stored in the memory 50 is read out, and the data comparison unit 13 performs the first
Through the fourth reversible counters 41, 42, 43, 44, the level difference data between the channels is controlled by controlling the operation of the conversion processing unit 14 by comparing with the level difference data between the setting data of the respective channels. While holding, the recording level of each channel can be changed. If there is a channel that is not used at this time, put a calibration signal in that channel and set this value to the signal level display unit 60 or display panel 80.
By returning to the original value while confirming with, the situation before narrowing down the signal level can be accurately restored.

The control unit 11 uses the calibration switch 25
When the operation of is accepted, the conversion processing unit 14 is controlled,
The signal level display section 60 is switched from the 1 dB / step to the 0.1 dB / step bar graph display state. Thereby, the signal level can be adjusted with high accuracy by using the calibration signal.

In addition, in this embodiment, the system controller
The control unit 10 of 10 switches the display contents of the display panel 80 to a plurality of pre-programmed display screens by operating the menu switch 27 and the ten key switch 28, and, for example, as shown in FIG. Level display
61, the timer display section 62 and the tape status display section 63 are laid out on the display screen, and as shown in FIG. 6, the audio signal level reduction display section 64, the cue data display section 65, the timer display section 66 and the tape status. The display screen for editing work in which the display unit 67 is laid out can be selectively displayed.

〔The invention's effect〕

As is apparent from the above description of the embodiment, in the level adjusting device according to the present invention, the pulse signal generated from the pulse generating means in response to the rotation of the dial is selected as the counting means corresponding to the channel designated by the designating means. By supplying the information, the signal levels of the information signals of the plurality of channels can be adjusted individually for each channel or simultaneously for the plurality of channels.

Further, when a plurality of channels are designated by the designating means, a level difference between the plurality of channels is detected, the level difference data between the channels is stored in the storage means, and is generated from the pulse generating means according to the rotation of the dial. By selectively supplying the pulse signal to the counting means corresponding to the channel designated by the designating means, the signal level of each information signal of the plurality of channels is maintained in a state in which the level difference between the plurality of channels is held. The adjustment can be performed simultaneously, and even if the level of the designated channel is maximized or minimized by the rotating operation of the dial, the signal of each channel is based on the inter-channel level difference data stored in the storage means. You can restore the level to its original state. Therefore, according to the present invention, by applying to an electronic device, a large number of operation knobs can be made common, a layout space can be secured in the operation panel, and operability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part configuration of an embodiment in which the present invention is applied to a video tape recorder, and FIG. 2 is an external perspective view of a video tape recorder main body of this embodiment. FIG. 4 is a flow chart showing the operation of the above embodiment, and FIGS. 5 and 6 show the contents of the display screen selectively displayed on the display panel provided in the video tape recorder main body in the above embodiment. It is a schematic diagram which shows. 1 ... Dial, 2 ... Panel generator 10 ... System controller 11 ... Control unit, 12 ... Arithmetic processing unit 13 ... Data comparison unit, 14 ... Conversion processing unit 20 ... Switch group 41, 42, 43,44 …… Counter 50 …… Memory, 60 …… Signal level display section 70 …… Level control section 100 …… Video tape recorder body

Claims (1)

[Claims] 1. A level adjusting device for adjusting the signal levels of information signals of a plurality of channels, and a specifying means for specifying one or a plurality of channels for adjusting the signal levels of the information signals from the plurality of channels, and a dial. A pulse generating means for generating a pulse signal according to rotation, and a pulse signal provided corresponding to the plurality of channels and selectively supplied from the pulse generating means are counted to obtain level setting data of each channel. A plurality of counting means for outputting, a control means for supplying the pulse signal from the pulse generating means to the counting means corresponding to one or a plurality of channels designated by the designating means, and each of the plurality of counting means. The calculation means for calculating the level difference between the channels from the level setting data and the calculation means Storage means for storing inter-channel level difference data, each level setting data from the plurality of counting means, and a signal level of an information signal of a corresponding channel in accordance with inter-channel level difference data stored in the storage means. Adjusting means for adjusting, wherein the calculating means calculates a level difference between the plurality of designated channels when the plurality of channels is designated by the designating means, and obtains the level difference data between the channels. A level adjusting device characterized by being supplied to the storage means.