広帯域映像信号の磁気記録におけるS/N改善検討(<論文特集>画像情報記録技術)

概要

論文の詳細を見る
We have obtained an SNR evaluation equation from experimental results for some wideband HD-VCRs that use an FM recording method. This equation shows a good agreement between experimental results and SNR calculated with recording parameters. We have attempted to improve SNR by using hyperbolic tangent functions to emphasize the dynamic linear-phase. SNR improvement of about 6 dB has been attained, and there is no notable distortion in the reproduced waveforms. This method is also effective in eliminating inverted white peaks. With respect to the RF system, we show that the head-oscillation compensation method, which can suppress waveform distortions, is also quite effective in preventing inverted white peaks and that SNR can be improved by about 2 dB by employing linearly descending dynamic equalization.
社団法人映像情報メディア学会の論文
1992-10-20