公开(公告)号：US5510788A

公开(公告)日：1996-04-23

申请号：US194448

申请日：1994-02-09

申请人： Hochang Jeong ,  Jong-Chul Park

发明人： Hochang Jeong ,  Jong-Chul Park

IPC分类号： H03M7/14 ,  G11B20/14 ,  H03M5/14 ,  H03M7/42

CPC分类号： G11B20/1426 ,  H03M5/145

摘要： An apparatus for converting source data into modulation data includes a compressed look-up table based on a conversion correlation, a non-effective data discriminator, a group discriminator, an output flag generator, a flag modulator, a control signal generator and an output compensator. A first address having the source data and a original input flag and a second address having the source data and a modulated input flag are sequentially applied to the look-up table which in turn generates first tentative data and a first tentative flag with respect to the first address, generates second tentative data and a second tentative flag with respect to the second address, and produces unique non-effective data when non-effective data is applied. The group discriminator produces a group discrimination signal based on the source data, the non-effective data discriminator produces a non-effective data detection signal when the first tentative data is non-effective data, the output flag generator produces an output flag based on one of the tentative flags and the non-effective data detection signal, and the flag modulator sequentially produces the original input flag and the moduated input flag based on the non-effective data detection signal and output of the output flag generator. The control signal generator produces a control signal based on the non-effective data detection signal and the group discrimination signal. The output compensator produces the modulation data, by modulating the second tentative data in accordance with the control signal.

摘要翻译： 用于将源数据转换成调制数据的装置包括基于转换相关的压缩查找表，非有效数据鉴别器，组鉴别器，输出标志发生器，标志调制器，控制信号发生器和输出补偿器 。 具有源数据和原始输入标志的第一地址以及具有源数据和调制输入标志的第二地址被顺序地施加到查找表，该查找表依次产生关于第一暂定数据和第一临时标志 第一地址，相对于第二地址生成第二临时数据和第二临时标志，并且当应用非有效数据时产生唯一的非有效数据。 组识别器基于源数据产生组鉴别信号，当第一临时数据是非有效数据时，非有效数据鉴别器产生非有效数据检测信号，输出标志发生器产生基于一个信号的输出标志 的标志调制器根据无效数据检测信号和输出标志发生器的输出顺序产生原始输入标志和调制输入标志。 控制信号发生器基于非有效数据检测信号和组识别信号产生控制信号。 输出补偿器通过根据控制信号调制第二临时数据来产生调制数据。