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1.发明公开Digital disk recording apparatus, and digital disk reproduction apparatus, with DC component reduction 失效Digitalplattenaufzeichnungsvorrichtung zur Verminderung der Gleichstromkomponente
公开(公告)号：EP1336964A1
公开(公告)日：2003-08-20
申请号：EP03011443.3
申请日：1997-07-28
发明人： Hori, Yoshihiro , Matsuyama, Hisashi , Kunisa, Akiomi , Itoh, Nobuo , Takahashi, Seiichiro , Hioki, Toshiaki , Asano, Kenji , Mamiyam Noboru , Uchihara, Yoshiharu , Nakao, Kenji , Sumi, Satoshi , Torazawa, Kenji
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 digital disc recording apparatus and a digital disk reproduction apparatus. The direct current component is minimized by selecting, among sequences of output data resulting from the convolution of input data, the sequence with the lowest DSV peak value or the lowest DSV final value. The convolution process is the exclusive OR-ing between the current code modulation unit to be transformed (Dk) and the code modulation unit immediately preceding that current code modulation unit (D'k-1) wherein the code modulation unit to be transformed at the leading place of a sequence (D0) is exclusive ORed with an initial data (Tj). The initial data is successively chosen between all the values to be taken by a predetermined number of bits corresponding to be length of a code modulation unit.
摘要翻译： 数字盘记录装置和数字盘再现装置。 通过在输入数据卷积产生的输出数据的序列中选择具有最低DSV峰值的序列或最低的DSV最终值来最小化直流分量。 卷积处理是当前代码调制单元（Dk）与紧邻当前代码调制单元（D'k-1）之前的代码调制单元之间的异或运算，其中要转换的代码调制单元 序列的前导位（D0）与初始数据（Tj）进行异或运算。 在对应于代码调制单元的长度的预定位数的所有值之间连续地选择初始数据。
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2.发明授权
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3.发明公开Digital modulation method, digital modulation circuit, digital demodulation circuit and digital demodulation method 失效Digitales Modulationsverfahren und Schaltung，digitales Demodulationsverfahren und Schaltung
公开(公告)号：EP1087532A1
公开(公告)日：2001-03-28
申请号：EP00121443.6
申请日：1997-10-09
IPC分类号： H03M7/14
摘要： A digital modulation methods is provided in which at a head of an input block (pre-translation), each of a plurality of different types of initial data of t bits is multiplexed to generate a plurality of different types of multiplexed blocks, t bits at the head and immediately following t bits of each of the multiplexed blocks are subjected to exclusive OR operation, the immediately following t bits are replaced by the result of operation, the replaced t bits and the immediately following t bits are subjected to an exclusive OR operation, and the immediately following t bits are replaced by the result of operation, and thereafter in the similar manner, convolution operation is executed, whereby a plurality of different types of translated blocks are produced by the convolution operation, and DC components of thus provided translated blocks are calculated respectively, absolute values of the respective DC components are compared with each other, and a translated block having the minimum value is selected and output externally.
摘要翻译： 提供了一种数字调制方法，其中在输入块的头部（预翻译）处，t位的多个不同类型的初始数据中的每一个被复用以产生多个不同类型的复用块，t位在 每个复用块的头部和紧随其后的t位进行异或运算，紧接着的t位被操作结果代替，替换的t位和紧随其后的t位经过异或运算 ，并且紧随其后的t位被操作结果代替，此后以类似的方式执行卷积运算，由此通过卷积运算产生多个不同类型的转换块，由此提供转换的DC分量 分别计算块，各直流分量的绝对值相互比较，具有最小的平移块 值被选择并从外部输出。
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