A study on modulation noise reduction in digital recording

Author

Matsui, T. ; Kamijo, K. ; Ohshima, H.

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2713

Lastpage

2715

Abstract

In digital recording, modulation noise is one of causes of degradation of the signal-to-noise ratio. A new mathematical model of reproduced digital signals including modulation noise is derived by considering that the major element of modulation noise in short-wave recording is head-to-media spacing variations. The total noise calculated from the mathematical model coincides with the noise extracted from reproduced digital signals of VCRs. A modulation noise reduction method which utilizes the mathematical model is proposed, and a simulation of reducing the modulation noise is shown. The improvement in the signal-to-noise ratio as a result of removing the modulation noise is approximately 2 dB

Keywords

digital magnetic recording; digital signals; magnetic recording noise; simulation; surface topography; video tape recorders; VCRs; digital recording; head-to-media spacing variations; mathematical model; media surface roughness; modulation noise reduction; reproduced digital signals; short-wave recording; signal-to-noise ratio degradation; simulation; Circuit noise; Degradation; Digital modulation; Digital recording; Frequency; Magnetic noise; Mathematical model; Noise reduction; Rough surfaces; Signal processing; Signal to noise ratio; Surface roughness; Video recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617454

Filename

617454