Stereo zoom microphone for consumer video cameras

Author

Matsumoto, M. ; Naono, H. ; Saitoh, H. ; Fujimura, K. ; Yasuno, Y.

Author_Institution

Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

Volume

35

Issue

4

fYear

1989

fDate

11/1/1989 12:00:00 AM

Firstpage

759

Lastpage

766

Abstract

A compact, built-in stereo zoom microphone for consumer video cameras is described. This system provides for automatic adjustment of the audio mixing ratio, interlocked to the optical zoom lens to achieve psychoacoustically balanced natural sound. The system is designed to work in a full-stereo recording condition at viewing angle and a monaural super-directional recording condition in the telescopic mode, in conjunction with control of the optical zoom lens. The sensitivity is modified in accordance with zooming magnification of the lens. Results of an experiment performed to evaluate the acoustic zoom effect and the coordination between image and sound show that this system has psychoacoustically better results than the conventional monaural-type zoom microphone

Keywords

Hi-Fi equipment; lenses; microphones; video cameras; Hi-Fi equipment; acoustic zoom effect; audio mixing ratio; automatic adjustment; built-in stereo zoom microphone; consumer video cameras; full-stereo recording condition; modified sensitivity; monaural super-directional recording condition; optical zoom lens; psychoacoustically balanced natural sound; telescopic mode; viewing angle; zooming magnification; Audio recording; Cameras; Lenses; Microphones; Optical control; Optical mixing; Optical recording; Optical sensors; Psychology; Video recording;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.106893

Filename

106893