发明名称 |
Video signal reproducing apparatus for converting a video signal from a first format to a second format |
摘要 |
In a video signal reproducing apparatus for converting a first video signal having a first field frequency to a second video signal having a second field frequency, there are provided a tape scanning device which is made movable in a direction perpendicular to the recording track on a tape, a system for controlling the speed of the scanning device, a system for shifting the scanning device in the aforesaid direction according to the difference between the first and second field frequencies, in order to skip or repeat selected fields so that the video signal is reproduced with the second field frequency. Also provided is a system for converting the number of lines contained in one field of the first video signal. In the above converting system there is included a memory, and the first video signal is written into the memory and read out therefrom so that a predetermined number of lines of the first video signal are discarded or repeated and the reproduced video signal has the required number of lines for each field of the second video signal.
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申请公布号 |
US4283736(A) |
申请公布日期 |
1981.08.11 |
申请号 |
US19800159611 |
申请日期 |
1980.06.16 |
申请人 |
SONY CORPORATION |
发明人 |
MORIO, MINORU;NAKAMURA, TADAHIKO;KAMBARA, MASAHIRO;KUBOTA, YUKIO |
分类号 |
H04N5/7826;H04N5/783;H04N5/93;H04N7/01;H04N9/79;(IPC1-7):H04N9/49;H04N5/02;G11B5/43;G11B21/08 |
主分类号 |
H04N5/7826 |
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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