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2. 发明授权

US3919716A Magnetic recording and/or reproducing apparatus for bandwidth reduced video signal and delayed audio signal 失效
标题翻译：用于带宽降低的视频信号和延迟音频信号的磁记录和/或再现装置
公开(公告)号：US3919716A
公开(公告)日：1975-11-11
申请号：US37613473
申请日：1973-07-03
申请人： HITACHI LTD
发明人： YUMDE YASUFUMI , NARITA SHO , MURAI MIKIO , KUBOTA TAKASHI
IPC分类号： H04N5/928 , G11B20/02 , G11B20/12 , H04N5/782 , H04N5/92 , H04N5/937 , H04N7/12 , H04N9/802 , E04H12/34 , H04N7/00
CPC分类号： H04N5/92 , H04N5/782 , H04N5/9202 , H04N5/937 , H04N9/802
摘要： A video signal recording device comprises magnetic tape recording means for the audio frequency band and first memory means capable of storing a video signal representing one picture, the video signal being written in the memory means at a high speed and read out at a low speed to thereby to convert the signal into a signal in the audio frequency band, so that a signal such as a television signal representing a frame or field is converted into a signal in the audio frequency band by the first memory means and recorded in the magnetic tape recording means together with an audio signal. The audio signal is delayed for a period of time equal to the processing time required for the bandwidth reduction of the video signal. A video signal reproducing device comprises a magnetic tape reproducing means for the audio frequency band and second memory means capable of storing a video signal representing one picture, the video signal being written in the second memory means at a low speed and read at a high speed to thereby to convert a signal in the audio frequency band into a signal of the video frequency band, so that the video signal of the audio frequency band reproduced from the magnetic tape reproducing means is converted into a signal in the video frequency band by the second memory means and repeatedly read out of it to thereby produce a video signal representing a still picture.
摘要翻译：视频信号记录装置包括用于音频频带的磁带记录装置和能够存储表示一个图像的视频信号的第一存储装置，该视频信号被高速写入存储装置并以低速读出，从而将信号转换成音频频带中的信号，使得诸如表示帧或场的电视信号的信号被第一存储装置转换成音频频带中的信号并记录在磁带记录中意味着连同音频信号。音频信号被延迟一段时间等于视频信号的带宽减小所需的处理时间。视频信号再现装置包括用于音频频带的磁带再现装置和能够存储表示一个图像的视频信号的第二存储装置，该视频信号以低速被写入第二存储装置并以高速读取从而将音频频带中的信号转换为视频频带的信号，使得从磁带再现装置再现的音频频带的视频信号被转换成视频频带中的信号，第二个存储装置并重复读出，从而产生表示静止图像的视频信号。

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