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    • 4. 发明授权
    • Modulating method, modulating device and demodulating device
    • 调制方式,调制装置和解调装置
    • US5506581A
    • 1996-04-09
    • US147836
    • 1993-11-05
    • Hiroyuki InoTakashi SatoToshiyuki Nakagawa
    • Hiroyuki InoTakashi SatoToshiyuki Nakagawa
    • G11B20/14H03M5/06H03M5/14H03M7/14H04L25/49H03M7/00
    • H03M5/145H04L25/4915G11B20/1426
    • A modulating method, a modulating device and a demodulating device, in which it is possible to improve the digital sum value (DSV) of the coded information, modulated for transmission or recording on the recording medium, are disclosed. An encoding circuit 11 translates a sequence of input data into a sequence of coded data suitable for transmission. A pattern generating circuit 12 generates a pattern of a pre-set length at a pre-set interval inversely proportionate to the low-range cut-off frequency of the modulated coded data. A pattern inserting circuit 13 inserts the patterns into the sequence of coded data A at the pre-set interval. A modulating circuit 14 NRZI modulates the pattern-interlaced sequence of the coded data B and outputs the resulting sequence. A timing control circuit 15 controls the pattern inserting circuit 13 an so forth. The DSV of the modulated coded data may be controlled by the inserted patterns, while the increase in redundancy may be maintained at a necessary minimum value to adapt the DSV control characteristics to the specifications demanded by the transmission system.
    • 公开了一种调制方法,调制装置和解调装置,其中可以改善在记录介质上进行调制以便传输或记录的编码信息的数字和值(DSV)。 编码电路11将输入数据序列转换为适合于传输的编码数据序列。 模式生成电路12以与调制编码数据的低范围截止频率成反比的预设间隔生成预置长度的模式。 模式插入电路13以预设的间隔将模式插入到编码数据A的序列中。 调制电路14 NRZI调制编码数据B的模式隔行序列并输出所得到的序列。 定时控制电路15控制图案插入电路13等。 调制编码数据的DSV可以通过插入的模式进行控制,而冗余度的增加可以保持在必要的最小值,以使DSV控制特性适应于传输系统要求的规范。
    • 5. 发明授权
    • Modulating method
    • 调制方式
    • US5432799A
    • 1995-07-11
    • US64764
    • 1993-05-19
    • Yoshihide ShimpukuHiroyuki InoYasuyuki ChakiToshiyuki Nakagawa
    • Yoshihide ShimpukuHiroyuki InoYasuyuki ChakiToshiyuki Nakagawa
    • G11B7/00G11B7/004G11B7/0045G11B20/14H03M7/46H03M13/00
    • G11B20/1426
    • A method of modulating digital data to a variable-length code having parameters d, k, m, n, and r for recording information on and reproducing the same from an optical disc. The optimal range of a minimum run length d corresponding to the minimum number of successive same symbols is determined by a procedure which includes a first step to determine the minimum S/N required for obtaining a desired error rate from the relationship between a bit error rate and the S/N when d=0; a second step to obtain the relationship between a change of the numerical value d and that of the S/N by calculating, on the basis of the required minimum S/N obtained at the first step, the S/N loss caused due to the change of the numerical value d; and a third step to determine, from the relationship between the numerical value d and the S/N, the range of the value d corresponding to the S/N of the transmission characteristic dependent on an optical system and an optical disc.
    • 将数字数据调制为具有参数d,k,m,n和r的可变长度代码的方法,用于从光盘记录信息并从光盘再现信息。 对应于连续相同符号的最小数量的最小游程长度d的最佳范围由包括第一步骤的步骤来确定,该步骤确定从误码率之间的关系中获得期望误码率所需的最小S / N 当d = 0时S / N; 通过基于在第一步骤中获得的所需最小S / N计算由于第一步骤所产生的S / N损失而获得数值d与S / N的变化之间的关系的第二步骤 数值变化d; 以及第三步骤,根据数值d和S / N之间的关系,确定与取决于光学系统和光盘的传输特性的S / N相对应的值d的范围。
    • 7. 发明申请
    • DATA PROCESSING APPARATUS AND METHOD, RECEIVING APPARATUS AND METHOD, SYNCHRONOUS DETECTION APPARATUS AND METHOD, AND COMPUTER PROGRAM
    • 数据处理装置和方法,接收装置和方法,同步检测装置和方法以及计算机程序
    • US20100316171A1
    • 2010-12-16
    • US12779253
    • 2010-05-13
    • Hiroyuki Ino
    • Hiroyuki Ino
    • H04L27/06G06F17/15
    • H04L7/042
    • A data processing apparatus includes a first correlation operation unit which performs a mutual correlation operation of a first input series and a second input series, a threshold value operation unit which calculates a threshold value based on the first input series, a first comparison unit which compares a first mutual correlation value with the threshold value, a search window setting unit which sets a search window for detecting the second input series to the first input series on the basis of the comparison result, a hard decision unit which performs binarization of the first input series, a second correlation operation unit which performs a mutual correlation operation of a first input hard decision value, and a detection position determining unit which searches for a maximum value of the mutual correlation value within the search window and determines the detection time of the maximum value.
    • 数据处理装置包括执行第一输入序列和第二输入序列的互相关操作的第一相关运算单元,基于第一输入序列计算阈值的阈值运算单元,比较 具有阈值的第一相互相关值,搜索窗口设置单元,其基于比较结果将用于检测第二输入序列的搜索窗口设置为第一输入序列;硬判决单元,其执行第一输入的二值化 系列,执行第一输入硬判决值的相互关联操作的第二相关运算单元和检索位置确定单元,其在搜索窗口内搜索相互相关值的最大值,并确定最大值的检测时间 值。
    • 10. 发明授权
    • Data encoding method and device, data decoding method and device, and data supply medium
    • 数据编码方法及装置,数据解码方法及装置及数据提供媒介
    • US06347390B1
    • 2002-02-12
    • US09354240
    • 1999-07-16
    • Hiroyuki Ino
    • Hiroyuki Ino
    • G06F1100
    • H03M5/145G11B20/1426G11B2020/1438
    • In encoding method and device for encoding m-bit data to an n-bit code, the n-bit code is generated according to a finite state transition diagram representing the restriction of ADS and RDS received by a code sequence; two states contained in a state assembly set as start points of the n-bit code in the finite state transition diagram exist at symmetrical positions with respect to the center point of the finite state transition diagram, at symmetrical positions with respect to the ADS axis passing through the center point of the finite state transition diagram or at the symmetrical positions with respect to the RDS axis passing the center point of the finite state transition diagram; the m-bit data are encoded to an n-bit code word having as a start point a predetermined state contained in a state assembly set as start points of the code; and an n-bit code word having as a start point another state contained in a state assembly set as start points by the code is obtained by further converting the encoded code word.
    • 在将m位数据编码为n位代码的编码方法和装置中,根据表示由代码序列接收的ADS和RDS的限制的有限状态转移图来生成n位代码; 作为有限状态转移图中的n位代码的起始点的状态组合中包含的两个状态存在于相对于有限状态转移图的中心点的对称位置,相对于ADS轴通过的对称位置 通过有限状态转换图的中心点或相对于通过有限状态转换图的中心点的RDS轴的对称位置; m位数据被编码为具有作为起始点的预定状态的n位代码字,该状态组合被设置为代码的起始点; 并且通过进一步转换编码的代码字,获得作为开始点的包含在通过代码设置为起始点的状态组合中的另一状态的n位代码字。