KR20170030189A - LD Budget-based Audio LD Automatic Control Method and System - Google Patents

Abstract

And an audio LD automatic control method and system based on LD Budget are provided. An audio control method according to an embodiment of the present invention calculates an LD Budget for content, subtracts LD Budget according to the reproduction of the content, and controls the audio LD of the remaining content based on the remaining LD Budget. As a result, it is possible to solve the dynamic range reduction and the distortion generation problem while adjusting the target LD by automatically controlling the LD Budget based audio LD.

Description

[0001] LD Budget-based Audio LD Automatic Control Method and System [

The present invention relates to an audio LD (LouDness) control method, and more particularly, to a method and system for automatically controlling an audio LD to conform to a broadcasting standard.

Conventionally, an audio LD automatic control method utilizes current data and past data to change the current LD. 1 is a view showing a conventional audio LD automatic control system.

The conventional audio LD automatic control system includes an LD measuring unit 10 and an LD automatic control unit 20 as shown in FIG.

The LD measuring unit 10 measures the LD of the input audio and the LD automatic controlling unit 20 compares the LD measured by the LD measuring unit 10 with the target LD to automatically control the LD of the inputted audio.

According to this, although the audio LD can be quickly adjusted to the target LD, there is a problem that the dynamic range is reduced and distortion with the original sound occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and system for automatically controlling an audio LD based on an LD Budget to solve a problem of dynamic range reduction and distortion.

According to an aspect of the present invention, there is provided an audio control method including: calculating an audio LD (LouDness) allocation amount for a content; Subtracting the audio LD allocation amount according to the reproduction of the content; And controlling an audio LD of the remaining content based on the remaining audio LD quota.

The calculating step may calculate the audio LD allocation amount using the total reproduction time of the content and the target LD.

Also, the subtracting step may calculate the amount of difference between the audio LD allocation amount by using the average audio LD and the reproduction time up to the present time.

In the control step, the remaining playback time of the content and the audio LD requirement amount calculated by the target LD may be controlled to be smaller than the remaining audio LD allocation amount.

In addition, the controlling step may determine an adjustment coefficient of the audio LD of the residual content based on the size of the residual audio LD allocation amount.

In the controlling step, the adjustment coefficient of the audio LD of the remaining content may be proportional to the size of the remaining audio LD allocation amount.

Further, the content is a broadcast program, and the target LD can be determined according to a broadcast standard.

According to another aspect of the present invention, there is provided an audio control system including: a calculation unit for calculating an audio LD (LouDness) allocation amount for contents; A management unit for subtracting the audio LD allocation amount according to the reproduction of the content; And a controller for controlling the audio LD of the remaining contents based on the remaining audio LD quota.

As described above, according to the embodiments of the present invention, it is possible to solve the dynamic range reduction and the distortion generation problem while matching the target LD with automatic LD LD based audio LD control.

In other words, according to the embodiments of the present invention, it is possible to provide a method, system, and equipment capable of adjusting the target LD while minimizing damage to the original sound through high-quality automatic volume control.

1 shows a conventional audio LD automatic control system,
2 is a block diagram of an audio LD automatic control system according to an embodiment of the present invention,
FIG. 3 is a detailed block diagram of an automatic LD LD based audio LD controller,
FIG. 4 is a flowchart illustrating a method of automatically controlling an LD Budget-based audio LD according to another embodiment of the present invention,
FIG. 5 is a diagram illustrating performance results of an LD budget-based audio LD automatic control method and an existing method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

2 is a block diagram of an audio LD (LouDness) automatic control system according to an embodiment of the present invention. The audio LD automatic control system according to the embodiment of the present invention automatically controls the audio LD based on the LD Budget.

The audio LD automatic control system according to the embodiment of the present invention, which performs such functions, includes an LD measuring unit 110 and an LD Budget based audio LD automatic control unit 120.

The LD measuring unit 110 measures the audio LD of the input broadcast program and provides the LD LD-based audio LD automatic control unit 120 with the measured LD.

The LD Budget based audio LD automatic control unit 120 generates the LD Budget using the target LD and the broadcasting program playback time and controls the audio LD of the broadcasting program according to the remaining LD Budget while subtracting the LD Budget according to the broadcasting program reproduction do.

Specifically, the LD Budget-based audio LD automatic control unit 120 controls so that the remaining playback time of the broadcast program and the audio LD required amount calculated by the target LD are kept smaller than the remaining LD Budget.

FIG. 3 is a detailed block diagram of an LD Budget-based audio LD automatic control unit 120. FIG. 3, the LD Budget based audio LD automatic control unit 120 includes an LD automatic control unit 121, an LD adjustment coefficient calculation unit 122, an LD Budget generation unit 123, a residual LD Budget management unit 124 And an output audio LD measuring unit 125. [

The LD Budget generating unit 123 calculates an LD Budget for the currently playing broadcast program. Specifically, the LD Budget generator 123 calculates LD Budget by multiplying the total playback time of the broadcast program by the target LD.

Loudness, K-weighted, relative to full scale) Sec Sec (sec) can be used as the unit of LD Budget, but it does not preclude the use of other units.

The output audio LD measuring unit 125 measures the audio LD output from the LD automatic control unit 121 and transmits the measured audio LD to the remaining LD Budget managing unit 124. [

The remaining LD Budget management unit 124 subtracts the LD Budget according to the reproduction of the broadcast program.

That is, the residual LD budget management unit 124 subtracts the value obtained by integrating the 'output audio LD' according to the 'output time (reproduction time)' in the LD Budget calculated by the LD Budget generating unit 123, In real time.

Alternatively, the remaining LD Budget managing unit 124 may calculate the audio LD difference amount by multiplying the average audio LD and the reproduction time up to the present for the broadcast program reproduced to date.

The LD control coefficient calculating unit 122 calculates the control coefficient of the audio LD for the remaining broadcast programs based on the size of the remaining LD Budget calculated by the remaining LD Budget managing unit 124. [

The adjustment coefficient of the audio LD of the remaining content calculated by the LD adjustment coefficient calculation unit 122 is proportional to the size of the residual LD Budget. Further, it may be proportional to the audio LD measured by the LD measuring unit 110.

The LD automatic control unit 121 automatically adjusts and outputs the audio LD of the broadcast program on the basis of the adjustment coefficient calculated by the LD adjustment coefficient calculation unit 122. [

4 is a flowchart illustrating a method of automatically controlling an LD Budget based audio LD according to another embodiment of the present invention.

As shown in FIG. 4, first, the LD Budget generator 123 calculates an LD Budget for the program currently being played (S210). LD budget can be calculated as 'total playback time of the program' × 'target LD'.

Next, the remaining LD budget management unit 124 calculates the remaining LD Budget by subtracting the LD Budget according to the reproduction of the broadcast program using the output audio LD measured by the output audio LD measurement unit 125 (S220).

In step S220, the amount of reduction may be calculated by integrating the 'output audio LD' delivered in real time from the output audio LD measuring unit 125 according to the 'output time (playback time)'. The output audio LD measuring unit 125 ) By multiplying the average of the output audio LD delivered in real time by the output time.

Thereafter, the LD adjustment coefficient calculating unit 122 calculates the adjustment coefficient of the audio LD for the remaining broadcast programs based on the size of the residual LD Budget calculated in step S220 (S230).

Then, the LD automatic control unit 121 automatically adjusts and outputs the audio LD of the broadcast program with the adjustment coefficient calculated in step S230 (S240).

Steps S210 to S240 continue until the broadcast program is terminated (S250).

FIG. 5 is a diagram illustrating performance results of an LD budget-based audio LD automatic control method and an existing method according to an embodiment of the present invention.

As shown in FIG. 5, the LD Budget-based audio LD automatic control method according to the embodiment of the present invention minimizes the damage of the original sound compared to the conventional audio LD control method and adjusts the target LD to the maximum while maintaining the dynamic range of the original sound to the maximum .

Up to now, preferred embodiments have been described in detail for an audio LD automatic control method and system based on the LD Budget.

In the above embodiment, it is possible to implement setting / operation with limitation on the adjustment coefficient of the audio LD of the residual content calculated by the LD adjustment coefficient calculating section 122. [ It is a means to prevent the audio LD from becoming too large if there is a large amount of residual LD Budget remaining.

Also, it is possible to implement setting and operating with a limit on the rate of change of the adjustment coefficient of the audio LD of the remaining content calculated by the LD adjustment coefficient calculating unit 122. [ It is a means for preventing sudden fluctuation of the audio LD when there are not many remaining broadcast programs remaining.

In addition, the broadcast program referred to in the above embodiment is merely an example of video content including audio content or audio. Accordingly, the technical idea of the present invention can also be applied to a case where a broadcast program is replaced with other kinds of contents.

In the case of a broadcast program, the target LD is generally determined by the broadcast standard, but the technical idea of the present invention can also be applied to the case where the target LD is determined by other factors.

On the other hand, LD Budget is a term used for introducing concepts, which means audio LD quota, and even if other terms are used, they are included in the scope of the present invention if they are the same.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

110: LD measuring unit
120: LD Budget Based Audio LD Automatic Control Unit
121: LD automatic control unit 122: LD control coefficient calculation unit
123: LD Budget Generation Unit 124: Residual LD Budget Management Unit
125: output audio LD measuring unit

Claims (8)

Calculating an audio LD (LouDness) quota for the content;
Subtracting the audio LD allocation amount according to the reproduction of the content; And
And controlling an audio LD of the remaining content based on the remaining audio LD allocation amount.
The method according to claim 1,
Wherein,
Wherein the audio LD allocation amount is calculated using the total reproduction time of the content and the target LD.
The method of claim 2,
Wherein the subtracting step comprises:
Wherein the amount of reduction of the audio LD allocation amount is calculated using the average audio LD and the reproduction time up to the present time with respect to the contents reproduced so far.
The method of claim 3,
Wherein the control step comprises:
Wherein the control is performed so that the remaining playback time of the content and the audio LD required amount calculated by the target LD are smaller than the remaining audio LD allocation amount.
The method of claim 3,
Wherein the control step comprises:
And determining an adjustment factor of the audio LD of the residual content based on the size of the residual audio LD quota.
The method of claim 5,
Wherein the control step comprises:
The adjustment coefficient of the audio LD of the remaining content,
And is proportional to the size of the residual audio LD quota.
In claim 2,
Wherein the content is a broadcast program,
Wherein the target LD is determined according to a broadcast standard.
A calculation unit for calculating an audio LD (LouDness) allocation amount for the content;
A management unit for subtracting the audio LD allocation amount according to the reproduction of the content; And
And a control unit for controlling the audio LD of the remaining content based on the remaining audio LD allocation amount.

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