发明授权
US5337194A Method apparatus and method for reproducing a frequency separated video signal stored on a recording medium 失效
用于再现存储在记录介质上的频率分离视频信号的方法装置和方法

Method apparatus and method for reproducing a frequency separated video
signal stored on a recording medium
摘要:
During shuttle mode operation in a system for the reproduction and storage of frequency separated video signals, the read head intersects a plurality of tracks corresponding to different fields of the image rather than following complete tracks. Accordingly, the full information for any one field is not recovered. To provide an image during shuttle mode, the system reads the dc luminance information of the tracks it intersects at the part where this information is stored. As the information content of the dc luminance information is relatively high, a recognisable image can be formed from this information alone. The dc luminance information is stored in the center of the tracks with the other components arranged in order of increasing frequency towards the edge of the tape. The data which is most important to generation of a high quality image is stored in a place where it is less likely to be degraded.
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