An Auto-Equalization System Based on DirectShow Technology and Its Application in Audio Broadcast System of Radio Station

Author

Yi, Guo ; Xinyue, Bai ; Hongbing, Xu

Author_Institution

Coll. of Autom., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China

Volume

2

fYear

2009

fDate

25-27 Dec. 2009

Firstpage

441

Lastpage

444

Abstract

How to ensure the output volume absolutely consistent has been a very important problem the audio broadcast system faced. An auto-equalization system based on DirectShow technology is proposed in this paper. In this system, it processes the audio file with equalize analysis processing. In this process, it compares the average loudness level of the input audio with the standard target loudness level which is defined in a SMPTE standard, and then obtains the difference between the two and save the result in the audio file itself before play with a simple watermarking algorithm. And then it can adjust the output volume by this result saved in the audio file itself when playback. In this way, it can ensure the output volume absolutely consistent perfectly.

Keywords

audio coding; equalisers; radio broadcasting; radio stations; watermarking; SMPTE standard; audio broadcast system; audio file; auto-equalization system; directshow technology; equalize analysis processing; radio station; standard target loudness level; watermarking algorithm; Application software; Broadcast technology; Calibration; Computer applications; Humans; ISO standards; Radio broadcasting; Signal processing; Target tracking; Watermarking; DirectShow; S48 format; equalization; filter; radio station;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science-Technology and Applications, 2009. IFCSTA '09. International Forum on

Conference_Location

Chongqing

Print_ISBN

978-0-7695-3930-0

Electronic_ISBN

978-1-4244-5423-5

Type

conf

DOI

10.1109/IFCSTA.2009.230

Filename

5384659