Employing the interlaced scanning, current TV system can compress the frequencyband of TV signal effectively and facilitate transmission.
现行的广播电视系统由于采用隔行扫描方式,从而有效地压缩了电视信号的频带,有利于传输;
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This paper presents formula to calculate the scanningfrequency, scanning Angle, scanning width and excessive focal length of the wide-band laser scanning device.