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Method suitable for controlling consistency of sound volume of file broadcasting system

A control method and broadcasting system technology, applied in speech analysis, instruments, etc., can solve problems such as inefficiency, achieve good control effects, require little modification, and require low adjustment capabilities

Active Publication Date: 2012-05-30
BEIJING DAYANG TECH DEV
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Problems solved by technology

[0004] The purpose of the present invention is to propose an audio loudness consistency control method suitable for file broadcasting systems, which introduces dynamic indicators to different types of audio, separates loudness control information from source material files, and ensures the quality of loudness control , and solve the inefficiency problem caused by regenerating files, and the content of the source material has not been processed twice, ensuring the original effect of the material

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  • Method suitable for controlling consistency of sound volume of file broadcasting system
  • Method suitable for controlling consistency of sound volume of file broadcasting system
  • Method suitable for controlling consistency of sound volume of file broadcasting system

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Embodiment Construction

[0023] An embodiment of an audio loudness consistency control method applicable to a file playout system, see Figure 1 to Figure 7 ;like figure 1 As shown, the method is implemented in a playout system, and the playout system includes a loudness control server 1, a nearline storage 2 and a playout server 3, and the loudness control server separates the audio data from the material files in the nearline storage Carry out scanning analysis to obtain the loudness characteristics of the files to be broadcast, determine the loudness adjustment value according to the loudness control target, send the loudness file with the loudness adjustment value back to the near-line server, and send it to the broadcast server together with the source material file. The loudness calculation method in the ITU-BS.1770 standard is used in the analysis and extraction of the loudness adjustment value, and the audio information in the file to be broadcast is adjusted with the loudness characteristic v...

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Abstract

The invention relates to a method suitable for controlling the consistency of the sound volume of a file broadcasting system. The method comprises the following steps: scanning and analyzing the sound in a file of a program to be broadcasted before broadcasting to obtain volume characteristics of the file to be broadcasted; and determining the volume adjusted value according to a volume control target. The method concretely comprises the following steps: dividing a sound file to be broadcasted from the beginning to the end in a certain window width; extracting the mean volume value of all thewindows, the maximum peak level of the sound file and the total mean volume value; taking the volume value which is larger than the total mean volume value and occurs at the highest frequency as a volume characteristic value; introducing the volume adjusted target value, and determining the volume adjusted value; and adding the volume adjusted value and level values of all sampling points of the original sound, and taking the obtained result as the final adjusted sound. The method of the invention has the following contributions to the prior art: the control effect of the volume consistency is good, the dynamic range of the program can not be changed, and the original artistic effect is not damaged, thus not only ensuring the quality of the volume control, but also solving the low efficiency problem brought by file regeneration.

Description

technical field [0001] The invention relates to an audio loudness consistency control method suitable for a file broadcast system. The method separates the loudness control information in the broadcast file from the material file, which not only ensures the quality of the loudness control, but also solves the problem of regenerating The inefficiency problem caused by the file, and the content of the material has not been processed twice, which ensures the original effect of the material. Background technique [0002] In the current broadcast system, due to various reasons such as inconsistent audio calibration levels and improper dynamic processing, there are sound loudness between different TV stations, between different channels, or even between different programs on the same channel, and between programs and advertisements. Different problems lead to the inconvenience that the audience needs to constantly adjust the output volume of the TV set during switching channels or...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00
Inventor 姚威骆新李岩
Owner BEIJING DAYANG TECH DEV
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