公开(公告)号：US07423949B2

公开(公告)日：2008-09-09

申请号：US11193341

申请日：2005-08-01

申请人： Junichiro Tonami ,  Yuuki Fujiwara

发明人： Junichiro Tonami ,  Yuuki Fujiwara

IPC分类号： G11B7/00

CPC分类号： G11B20/1426 ,  G11B20/1833 ,  G11B2020/1272 ,  G11B2020/1288 ,  G11B2020/1863 ,  G11B2220/2541

摘要： A signal of a run-length-limited code is read out from a recording medium. The read-out signal is converted into a reproduced digital signal. A decoder subjects the reproduced digital signal to first decoding different from run length decoding to get a first decoded signal. Information bit streams are generated from the first decoded signal. The information bit streams are different in timing by 1-bit-correpsonding intervals. Run length decoders subject the information bit streams to run length decoding to get run-length-decoded bit streams respectively. Each of the run-length-decoded bit streams undergoes one of error correction and error detection. A decision is made as to which of the run-length-decoded bit streams is the smallest in error number on the basis of results of the one of error correction and error detection. The run-length-decoded bit stream being the smallest in error number is selected and outputted as a likeliest information bit stream.

摘要翻译： 从记录介质读出游程长度限制代码的信号。 读出信号被转换成再现的数字信号。 解码器对再现的数字信号进行与游程长度解码不同的第一解码以获得第一解码信号。 从第一解码信号生成信息比特流。 信息比特流在时间上是不同的，通过1位相关的间隔。 运行长度解码器对信息比特流进行运行长度解码以分别获得游程长度解码的比特流。 每个游程长度解码的比特流经历纠错和错误检测之一。 根据错误校正和错误检测的结果，作出关于哪个运行长度解码的比特流在错误数中最小的决定。 作为最差信息比特流，选择并输出错误编号中最小的游程长度解码比特流。

公开(公告)号：US07516392B2

公开(公告)日：2009-04-07

申请号：US11203156

申请日：2005-08-15

申请人： Junichiro Tonami ,  Yuuki Fujiwara

发明人： Junichiro Tonami ,  Yuuki Fujiwara

IPC分类号： H03M13/00

CPC分类号： G11B20/1813 ,  G11B20/1426 ,  G11B2020/1457

摘要： A first run length encoder implements run length modulation of a first information signal to generate a second information signal of a run-length-limited code while subjecting the second information signal to DSV control and adding a sync signal to the second information signal to get a third information signal. A converter changes the third information signal into an NRZI signal including information code words. A parity generator produces original parity signals in response to the information code words in the NRZI signal, and combines the information code words and the original parity signals to form a first parity-added signal. A second run length encoder implements run length modulation of only the original parity signals in the first parity-added signal to convert the first parity-added signal into a second parity-added signal while subjecting the second parity-added signal to DSV control. The second parity-added signal is recorded on a recording medium.

摘要翻译： 第一游程长度编码器实施第一信息信号的游程长度调制，以产生游程长度限制码的第二信息信号，同时对第二信息信号进行DSV控制，并将同步信号添加到第二信息信号以获得 第三信息信号。 A转换器将第三信息信号改变成包括信息码字的NRZI信号。 奇偶生成器响应于NRZI信号中的信息码字产生原始奇偶校验信号，并且组合信息码字和原始奇偶校验信号以形成第一奇偶校验相加信号。 第二游程长度编码器在第一奇偶校验相加信号中实现仅原始奇偶校验信号的游程长度调制，以将第一奇偶校验相加信号转换成第二奇偶校验相加信号，同时使第二奇偶校验相加信号进行DSV控制。 第二奇偶校验相加信号被记录在记录介质上。

公开(公告)号：US20060123328A1

公开(公告)日：2006-06-08

申请号：US11203156

申请日：2005-08-15

申请人： Junichiro Tonami ,  Yuuki Fujiwara

发明人： Junichiro Tonami ,  Yuuki Fujiwara

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： G11B20/1813 ,  G11B20/1426 ,  G11B2020/1457

摘要： A first run length encoder implements run length modulation of a first information signal to generate a second information signal of a run-length-limited code while subjecting the second information signal to DSV control and adding a sync signal to the second information signal to get a third information signal. A converter changes the third information signal into an NRZI signal including information code words. A parity generator produces original parity signals in response to the information code words in the NRZI signal, and combines the information code words and the original parity signals to form a first parity-added signal. A second run length encoder implements run length modulation of only the original parity signals in the first parity-added signal to convert the first parity-added signal into a second parity-added signal while subjecting the second parity-added signal to DSV control. The second parity-added signal is recorded on a recording medium.

公开(公告)号：US20060028749A1

公开(公告)日：2006-02-09

申请号：US11193341

申请日：2005-08-01

申请人： Junichiro Tonami ,  Yuuki Fujiwara

发明人： Junichiro Tonami ,  Yuuki Fujiwara

IPC分类号： G11B20/10

CPC分类号： G11B20/1426 ,  G11B20/1833 ,  G11B2020/1272 ,  G11B2020/1288 ,  G11B2020/1863 ,  G11B2220/2541

摘要： A signal of a run-length-limited code is read out from a recording medium. The read-out signal is converted into a reproduced digital signal. A decoder subjects the reproduced digital signal to first decoding different from run length decoding to get a first decoded signal. Information bit streams are generated from the first decoded signal. The information bit streams are different in timing by 1-bit-correpsonding intervals. Run length decoders subject the information bit streams to run length decoding to get run-length-decoded bit streams respectively. Each of the run-length-decoded bit streams undergoes one of error correction and error detection. A decision is made as to which of the run-length-decoded bit streams is the smallest in error number on the basis of results of the one of error correction and error detection. The run-length-decoded bit stream being the smallest in error number is selected and outputted as a likeliest information bit stream.

摘要翻译： 从记录介质读出游程长度限制代码的信号。 读出信号被转换成再现的数字信号。 解码器对再现的数字信号进行与游程长度解码不同的第一解码以获得第一解码信号。 从第一解码信号生成信息比特流。 信息比特流在时间上是不同的，通过1位相关的间隔。 运行长度解码器对信息比特流进行运行长度解码以分别获得游程长度解码的比特流。 每个游程长度解码的比特流经历纠错和错误检测之一。 根据错误校正和错误检测的结果，作出关于哪个运行长度解码的比特流在错误数中最小的决定。 作为最差信息比特流，选择并输出错误编号中最小的游程长度解码比特流。