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1. 发明申请

WO1998017005A1 METHOD AND CIRCUIT FOR DIGITAL MODULATION AND METHOD AND CIRCUIT FOR DIGITAL DEMODULATION 审中-公开
标题翻译：数字调制方法与电路及数字解调方法与电路
公开(公告)号：WO1998017005A1
公开(公告)日：1998-04-23
申请号：PCT/JP1997003632
申请日：1997-10-09
申请人： SANYO ELECTRIC CO., LTD. , KUNISA, Akiomi , ITOH, Nobuo , TAKAHASHI, Seiichiro
发明人： SANYO ELECTRIC CO., LTD.
IPC分类号： H03M07/14
CPC分类号： H03M13/31 , H03M5/145
摘要： In a digital modulation method, a plurality of kinds of multiplexed blocks are generated by respectively multiplexing a plurality of kinds of t-bit initial data upon the leading edges of input blocks (before conversion), and the exclusive OR of the leading (t) bits of each multiplexed block and the (t) bits immediately after the leading (t) bits is calculated. Then, the (t) bits immediately after the leading (t) bits are replaced on the basis of the above resultant, and the exclusive OR of the replaced (t) bits and the (t) bits immediately after the replaced (t) bits is calculated. Thereafter, the (t) bits immediately after the calculated (t) bits are replaced on the basis of the resultant on the exclusive - OR calculation. Thereafter, the convolution is similarly executed and the DC components of the converted blocks generated by the convolution are calculated and the minimum converted block is selected by comparing the magnitudes of the absolute values of the DC components with each other and outputted.
摘要翻译：在数字调制方法中，通过在输入块的前沿（转换前）分别复用多种t位初始数据来产生多种复用块，并且将前导（t）计算每个多路复用块的位和紧接在前导（t）位之后的（t）位。然后，基于上述结果替换前导（t）比特之后的（t）比特，并且替换（t）比特之后的替换的（t）比特和（t）比特的异或被计算。此后，基于异或运算的结果，替换计算出的（t）位之后的（t）位。此后，类似地执行卷积，并且计算通过卷积产生的转换块的DC分量，并且通过将DC分量的绝对值的大小彼此进行比较并输出来选择最小转换块。

2. 发明申请

WO1998016929A1 DIGITAL RECORDING METHOD, DIGITAL DISK, DIGITAL DISK RECORDING DEVICE, AND DIGITAL DISK REPRODUCING DEVICE 审中-公开
标题翻译：数字记录方法，数字磁盘，数字磁盘记录装置和数字磁盘再现装置
公开(公告)号：WO1998016929A1
公开(公告)日：1998-04-23
申请号：PCT/JP1997002621
申请日：1997-07-28
申请人： SANYO ELECTRIC CO., LTD. , HORI, Yoshihiro , MATSUYAMA, Hisashi , KUNISA, Akiomi , ITOH, Nobuo , TAKAHASHI, Seiichiro , HIOKI, Toshiaki , ASANO, Kenji , MAMIYA, Noboru , UCHIHARA, Yoshiharu , NAKAO, Kenji , SUMI, Satoshi , TORAZAWA, Kenji
发明人： SANYO ELECTRIC CO., LTD.
IPC分类号： G11B20/14
CPC分类号： G11B7/0045 , G11B7/004 , G11B7/00718 , G11B7/00745 , G11B7/24082 , G11B11/10502 , G11B11/10504 , G11B11/10515 , G11B11/10595 , G11B20/1426 , G11B27/24 , G11B2020/1457 , G11B2220/216 , G11B2220/2562
摘要： A meandering groove is formed in a digital disk (10) by wobble signals wobbled to reproduce clock signals. An optical head (26) reads the wobbling signals and an address detecting circuit (4) detects an address signal multiplexed with the wobbling signals. A PLL oscillation circuit (24) outputs a clock signal synchronized with the wobbling signals, the data are modulated by means of a modulation circuit (16) based on the clock signal and a timing signal which is generated on the basis of the address signal, and the modulated data are recorded on the disk (10). To reproduce data, an A/D converter (42) converts an RF signal contained in the wobble signals into a digital signal and a demodulation circuit (44) demodulates the data and outputs the demodulated data.
摘要翻译：通过摆动的摆动信号在数字盘（10）中形成曲折的凹槽以再现时钟信号。光头（26）读取摆动信号，地址检测电路（4）检测与摆动信号复用的地址信号。 PLL振荡电路（24）输出与摆动信号同步的时钟信号，通过基于时钟信号的调制电路（16）和基于地址信号生成的定时信号对数据进行调制，并且将调制数据记录在盘（10）上。为了再现数据，A / D转换器（42）将摆动信号中包含的RF信号转换为数字信号，解调电路（44）对数据进行解调并输出解调数据。

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