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DEVICE FOR REPRODUCING DIGITALLY CODED INFORMATION RECORDED ON A DISC-LIKE INFORMATION CARRIER THAT CAN BE EXPLORED OPTICALLY
DEVICE FOR REPRODUCING DIGITALLY CODED INFORMATION RECORDED ON A DISC-LIKE INFORMATION CARRIER THAT CAN BE EXPLORED OPTICALLY
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机译:用于复制光盘上类似光盘的载体上记录的数字编码信息的设备,可以通过光学方式进行探索
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摘要
Disclosed is an apparatus for reproducing digitally coded information recorded on a disc-shaped record carrier in the form of optically detectable, unit information areas arranged in accordance with a concentric or spiral track pattern. The apparatus comprises a filter which is tuned to a frequency f=V/L, V being the nominal tangential speed of the record carrier and L the nominal center-to-center distance of said unit areas. This frequency component has a frequency equal to twice the bit frequency of the coded information and is situated at a zero point of the power spectrum of said information, so that the extracted signal may be employed for the generation of a clock signal.
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机译:公开了一种用于再现记录在盘状记录载体上的数字编码信息的设备,该信息以按照同心或螺旋轨迹图案布置的光学可检测的单位信息区域的形式出现。该设备包括一个滤波器,该滤波器被调谐到频率f = V / L,V是记录载体的标称切线速度,L是所述单位区域的标称中心距。该频率分量具有等于编码信息的比特频率的两倍的频率,并且位于所述信息的功率谱的零点处,使得所提取的信号可以用于生成时钟信号。
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