发明名称 |
Adaptive deemphasis and reemphasis of high frequencies in video tape recording, utilizing a recorded control signal |
摘要 |
A video signal recording system is disclosed which includes a circuit for generating a control signal representative of the level of the high-frequency portion of a full-bandwidth luminance signal. An adaptive deemphasis circuit reduces the level of the high-frequency portion of the luminance signal in response to the control signal. A folding circuit folds the high-frequency portion of the deemphasized luminance signal into the low-frequency portion. The folded deemphasized luminance is combined with the control signal and recorded on the video tape. A video signal playback system is disclosed which includes a circuit for separating the previously recorded control signal from the previously recorded folded deemphasized luminance signal. An unfolding circuit unfolds the played back luminance signal to produce a wide bandwidth deemphasized luminance signal. An adaptive reemphasis circuit boosts the level of the high-frequency portion of the unfolded luminance signal in response to the separated control signal.
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申请公布号 |
US5745635(A) |
申请公布日期 |
1998.04.28 |
申请号 |
US19930008813 |
申请日期 |
1993.01.25 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
STROLLE, CHRISTOPHER H.;SCHNITZLER, RAYMOND A. |
分类号 |
H04N5/922;H04N5/923;H04N7/12;H04N9/793;H04N9/797;H04N9/82;H04N9/835;H04N9/85;(IPC1-7):H04N5/76 |
主分类号 |
H04N5/922 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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