会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明公开
    • 워블 복조 장치 및 워블 복조 방법
    • WOBBLE DEMODULATION DEVICE AND WOBBLE DEMODULATION METHOD,特别是通过在记录数字信息的光学记录介质中检测和解码一个可编码的信号来解调数字信息,通过在轨道上形成一个MSK调制的WOBBLE
    • KR1020040032799A
    • 2004-04-17
    • KR1020030070560
    • 2003-10-10
    • 파나소닉 주식회사
    • 나카타고헤이구시마도요지우스이마코토오오시마가즈야미나미노준이치
    • G11B20/10
    • G11B7/0053G11B20/1403G11B27/19G11B27/24G11B2220/20
    • PURPOSE: A wobble demodulation device and a wobble demodulation method are provided to detect an MSK(Minimum Shift Keying) modulation mark to prevent a detection position of the MSK modulation mark from being shifted when a wobble signal is transformed, thereby obtaining exact position information while improving an address reproduction performance. CONSTITUTION: A wobble track is MSK-modulated on an optical recording medium(101). An optical head(102) irradiates an optical beam on the optical recording medium(101), detects an amount of reflected light from the medium(101), and outputs an electrical signal. A wobble signal detector(103) extracts an MSK-modulated wobble signal from the electrical signal. A carrier signal generator(104) generates a carrier signal phase-synchronized with the wobble signal. A multiplier(105) multiplies the wobble signal by the carrier signal. An MSK detector(106) detects an MSK modulation mark based on the multiplied output. An MSK synchronization detector(107) detects a bit synchronization position from an MSK detection signal. A decoder(108) decodes digital information based on the multiplied output.
    • 目的:提供摆动解调装置和摆动解调方法,以便在摆动信号变换时检测MSK(最小移位键控)调制标记,以防止MSK调制标记的检测位置移位,从而获得准确的位置信息,同时 提高地址再现性能。 构成:在光学记录介质(101)上对摆动轨迹进行MSK调制。 光头(102)将光束照射在光记录介质(101)上,检测来自介质(101)的反射光量,并输出电信号。 摆动信号检测器(103)从电信号提取MSK调制的摆动信号。 载波信号发生器(104)产生与摆动信号相位同步的载波信号。 乘法器(105)将摆动信号乘以载波信号。 MSK检测器(106)基于所乘的输出来检测MSK调制标记。 MSK同步检测器(107)从MSK检测信号检测比特同步位置。 解码器(108)基于相乘的输出对数字信息进行解码。