テレビジョン学会技術報告
Online ISSN : 2433-0914
Print ISSN : 0386-4227
直交変調を用いたEDTVの波形等化
上畠 秀世影山 定司バウザー タッド井上 秀士安本 吉雄
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研究報告書・技術報告書 フリー

1991 年 15 巻 61 号 p. 19-24

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Using quadrature modulation of the video carrier, digital sound as well as high frequency component of side panels can be transmitted while keeping the compatibility with NTSC. In this system, if a ghost occurred, phase error of detection axis would occur too. Also crosstalk from main signal quadrature distortion would come up, then multiplex signal would be degraded. In order to receive the multiplex signal without distortion, we used two dimensional waveform equalizer which can compensate the detection axis and eliminate ghosts of the multiplex signal, crosstalk from main to multiplex signal and quadrature distortion. The experimental result show the residual crosstalk is reduced 5dB more than the conventional two dimensional waveform equalizer without phase compensation, when -12dB, 90 degree ghost exists. Both of residual ghosts and crosstalk can be reduced to a level to 36-40dB (D/U).

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© 1991 一般社団法人映像情報メディア学会
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