JPH0697553B2 - Recording level display method and device - Google Patents

Description

The present invention relates generally to a recording level display method and apparatus,
More specifically, the present invention relates to a recording level display method and device for displaying a recording level at the time of recording in a digital audio recording / reproducing device such as an R-DAT or a tape recorder.

[Conventional technology]

Conventionally, as this kind of recording level display method, the level of the input signal to be recorded is detected, the peak value is detected by analyzing the level data obtained by the detection, and the peak value is held and displayed numerically. There are things I tried to do.

An apparatus for carrying out this method is shown in FIG. In the figure, 1 is a signal processing unit that detects the level of an input signal to be recorded and outputs level data, 2 is a microcomputer that analyzes the level data output by the signal processing unit 1, and 3 is a numerical value of the level data. It is a display unit for displaying.

Level data regarding the level of the input signal detected by the signal processing unit 1 is input to the microcomputer 2. The microcomputer 2 analyzes the input level data, detects the peak value thereof, and judges whether to update the display data or keep the original display data according to the detected peak value. Sends new display data to the display unit 3. The display unit 3 performs display based on the display data sent from the microcomputer 2.

[Problems to be Solved by the Invention]

In the above-described conventional recording level display method and device, since the peak value is always held and displayed, even if the volume is moved, the peak value remains unchanged unless an input signal with a level higher than the hold value is input. The display is kept unchanged, and the display on the display unit 3 does not change. Therefore,
Even if you move the volume to set the recording level, you may not be able to know the change in the level of the input signal due to the movement of the volume, and eventually you will not be able to know whether the recording level has reached the level you want to set. is there.

In order to solve such a problem, that is, in order to be able to know the change of the input signal level due to the movement of the volume, it is sufficient to reset the original peak value and input the same signal again. If you do this,
In addition to the need to independently provide a means for resetting the peak value, a new problem arises in that a troublesome operation is required.

Therefore, according to the present invention, the level of the input signal corresponding to the new volume value can be displayed only by moving the volume for setting the recording level, and the recording level can be easily set without requiring any special means or operation. It is an object of the present invention to provide a recording level display method and device for doing so.

[Means for Solving the Problems]

In order to solve the above problems, a recording level display method according to the present invention is a method for detecting a peak value of an input signal to be recorded and displaying the detected peak value on a display unit. The moving amount of the recording volume is detected, and the detected moving amount is added or subtracted from the peak value displayed on the display unit according to the moving direction of the recording volume, and is obtained by the addition or subtraction. It is characterized in that the display of the display unit is changed according to the value that is set.

In order to solve the above problems, the recording level display device according to the present invention has a peak value detecting means 14 for detecting the peak value of an input signal to be recorded, as shown in the basic configuration diagram of FIG.
In a device having a and a display unit 15 for displaying the peak value detected by the peak value detection means 14a, a movement amount detection means 14b for detecting the movement amount of the recording volume 11 for changing the recording level, and the movement The addition / subtraction means 14c for adding or subtracting the movement amount detected by the amount detection means 14b to or from the peak value displayed on the display unit 15 according to the movement direction of the volume 11 is provided. 1
The display of the display unit 15 is changed according to the value obtained by addition or subtraction by 4c.

[Work]

In the above method, the moving amount of the recording volume for changing the recording level is detected, and the detected moving amount is added to or peak value is added to the peak value displayed on the display unit according to the moving direction of the recording volume. Since the display of the display unit is changed according to the value obtained by the addition or subtraction, the recording level that reflects the level change of the input signal according to the operation amount can be obtained by simply operating the recording volume. The display is obtained on the display.

Further, in the above device, the moving amount detecting means 14b detects the moving amount of the recording volume 11 which changes the level of the input signal to be recorded, and the adding / subtracting means 14c detects the moving amount by the moving amount detecting means 14b. Depending on the moving direction of 11, the addition or subtraction from the peak value of the previous input signal displayed on the display unit 15 is performed, and the display unit is displayed by the value obtained by the addition or subtraction by the addition / subtraction means 14c. Since the display of 15 is changed, only by operating the recording volume 11, the recording level display reflecting the level change of the input signal according to the operation amount is displayed on the display section 15.
Can be obtained.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a block diagram showing an embodiment of a recording level display device for implementing the recording level display method according to the present invention. In FIG. 2, 11 is a recording volume, which transmits an input signal to be recorded. Is provided on a signal line (not shown). 12 is an A / D converter that converts the position of the recording volume 11 to a digital value, 13 is a signal processor that detects the level of the input signal to be recorded and outputs level data,
Reference numeral 14 is a microcomputer that analyzes the level data and detects the volume movement amount, and generates display data based on the result, which is a ROM and a RAM (not shown).
And has various functions by operating according to a predetermined control program stored in the ROM. The RAM included in the microcomputer 14 is data input from the A / D conversion unit 12 and the signal processing unit 13 for performing the analysis and detection,
In addition to an area for storing display data generated as a result of the analysis and detection, it has a work area used for performing the above work. Reference numeral 15 is a display unit for displaying display data.

The recording level display device described above operates as follows to implement the recording level display method of the present invention.

At the time of recording, the microcomputer 14 analyzes the level data of the input signal to be recorded sent from the signal processing unit 13 and detects the peak value thereof. This peak value is detected by comparing the display data corresponding to the previous peak value with the level data from the signal processing unit 13.
As a result of this comparison, the microcomputer 14 replaces the level data sent from the signal processing unit 13 with the peak value (display data) up to that point if the level data is larger, and updates it, and if it is smaller, The peak value up to that point is held, and the updated peak value or the held peak value is output to the display unit 15 as display data.

The microcomputer 14 also captures the digital data of the volume position which is A / D converted by the A / D converter 12, and the digital data (new data) of the captured volume position is previously captured and held. The data (previous data) is compared, and the movement amount of the volume is detected based on the comparison result. After comparing the previous data with the new data, the previous data is updated with the new data.

After the detection of the peak value of the level data and the detection of the volume movement amount, the microcomputer 14 adds or subtracts the volume movement amount to the peak value of the level data according to the movement direction of the volume to create display data. When the display unit 15 displays the peak margin, which is the difference between the input signal level and the maximum allowable level, the movement amount is subtracted when moving in the volume up direction, and added when moving in the volume down direction. do it. The microcomputer 14 sends the display data created as described above to the display unit 15, and the display unit 15 displays the display data.

For example, the case where the display unit 15 displays 6 dB as the peak margin as shown in FIG. 3, and the digital conversion value at the volume position is 18 dB, the peak margin is set to 2 dB will be described below.

When the recording volume is increased from 18 dB to 17 dB, the moving amount 1 dB is subtracted from the peak margin 6 dB to obtain 5 dB, and 5 dB is displayed as the peak margin display. After that, the moving amount is successively subtracted from the peak margin as described above, and the setting of the recording level is completed when the peak margin display becomes 2 dB. In this description, the digital conversion value at the recording volume position is expressed with 0 dB as the maximum value.

FIG. 4 is a flow chart showing the work performed by the microcomputer 14 of the recording level display device described above with reference to FIG. 2 according to a predetermined program. The operation of the device will be described below with reference to this flow chart.

The microcomputer 14 starts its operation when its power is turned on, and compares the input signal level data with the display data (peak value) in step S1. The input signal level data is input from the signal processing unit 13 in a predetermined cycle and stored in a predetermined area in the RAM, and the display data is also stored in a predetermined area in the RAM. Next, the process proceeds to step S2, where it is determined whether the display data is equal to the input signal level data or greater than the input signal level data by the comparison result in step S1, and when the determination result is YES, the step S3 is performed. If NO, the process proceeds to step S4. In step S3, the display data (peak value) up to that point is retained, and in step S4, the input signal level data compared as described above is replaced with the display data up to that point as new display data (peak value). Update.

After executing the above steps S3 and S4, the process proceeds to step S5, where new data at the position of the recording volume 11 and the previous data are compared to detect the difference between the two data. The new data is digital data obtained by digitally converting the position of the recording volume 11 by the A / D conversion unit 12, is input at a predetermined cycle and is stored in a predetermined area in the RAM, and the previous data is of the recording volume 11. It is volume position digital data fixed as a position, which is also stored in a predetermined area in the RAM.

Next, in step S6, the new data is stored in a predetermined area of the RAM as new previous data. After that, the process proceeds to step S7, where it is determined whether or not this new previous data is larger than the previous previous data. This step S7
When the determination is NO, that is, when the new previous data is large, the process proceeds to step S8, where the display data (peak value) held in step S3 or the step
The predetermined value is added to the display data (peak value) updated in S4. When the determination in step S8 is YES, that is, when the new data is small, the process proceeds to step S9, where the display data (peak value) held in step S3 or the display data (peak value) updated in step S4 is used. The predetermined value is subtracted.

After the execution of step S8 or S9, the process proceeds to step S10, where the result of the addition in step S8 or the subtraction in step S9 is stored in a predetermined area in the RAM as new display data. The display data stored in the predetermined area in the RAM is read out in the next step S11 and sent to the display unit 15. After execution of step S11, the process returns to step S1 and the above-described operation is repeated.

The above is applicable not only to the digital audio recording / playback device but also to any device that displays the recording level.

[Effect]

As described above, according to the present invention, since the volume movement amount is obtained, and the display data is added and subtracted by the movement amount to form the display data, the level input until the volume is moved, The input level at the new volume position can be displayed. Therefore, the level setting is completed simply by moving the volume control to reach the desired level, and there is no need to reset the peak value before that and input the same signal again to confirm the level as in the conventional case.

[Brief description of drawings]

1 is a block diagram showing the basic configuration of a recording level display device according to the present invention, FIG. 2 is a block diagram showing an embodiment of the recording level display device according to the present invention, and FIG. 3 is implemented by the device of FIG. FIG. 4 is an explanatory view for explaining an embodiment of a recording level display method according to the present invention, FIG. 4 is a flow chart showing the work performed by a microcomputer in FIG. 2 according to a predetermined program, and FIG. 3 is a block diagram showing an example of a recording level display method and device of FIG. 11: Recording volume, 14a: Peak value detection means, 14b
...... Movement detection means, 14c ...... Addition and subtraction means, 15 ...... Display section.

Claims (2)

[Claims] 1. A recording level display method for detecting a peak value of an input signal to be recorded and displaying the detected peak value on a display unit, detecting a movement amount of a recording volume for changing the recording level, The detected movement amount is added to or subtracted from the peak value displayed on the display unit according to the moving direction of the recording volume, and the display of the display unit is changed according to the value obtained by the addition or subtraction. , Recording level display method characterized by the following. 2. A recording level display device comprising a peak value detecting means for detecting a peak value of an input signal to be recorded and a display section for displaying the peak value detected by the peak value detecting means. Moving amount detecting means for detecting the moving amount of the recording volume, and the moving amount detected by the moving amount detecting means is added to the peak value displayed on the display unit according to the moving direction of the volume, or A recording level display device, comprising: an addition / subtraction unit for subtracting from a peak value, and changing the display of the display unit according to a value obtained by addition or subtraction by the addition / subtraction unit.