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51. 发明授权

US5991501A Apparatus and method for recording and reproducing digital signals on first and second areas of a storage medium 失效
标题翻译：用于在存储介质的第一和第二区域上记录和再现数字信号的装置和方法
公开(公告)号：US5991501A
公开(公告)日：1999-11-23
申请号：US671335
申请日：1996-06-27
申请人： Seiji Higurashi , Takeo Ohishi , Mitsuo Harumatsu
发明人： Seiji Higurashi , Takeo Ohishi , Mitsuo Harumatsu
IPC分类号： G11B20/12 , G11B27/30 , G11B5/09 , H04N5/91 , H04N9/79
CPC分类号： G11B27/3063 , G11B20/1208
摘要： A digital signal is recorded along tracks on a recording medium. Each of the tracks has plural areas. A portion of the digital signal which is recorded on a first area out of the plural areas includes information for reproduction of the digital signal. The information is recorded also on at least one of second areas out of the plural areas. The second areas are greater in size than the first area. The information includes, for example, subcode header information.
摘要翻译：数字信号沿记录介质上的磁道记录。每个轨道具有多个区域。记录在多个区域中的第一区域上的数字信号的一部分包括用于再现数字信号的信息。信息也记录在多个区域中的至少一个第二区域中。第二个区域的大小比第一个区域大。该信息包括例如子码头信息。

52. 发明授权

US5986833A Data recording method for recording absolute address data on a tape storage medium 失效
标题翻译：用于在磁带存储介质上记录绝对地址数据的数据记录方法
公开(公告)号：US5986833A
公开(公告)日：1999-11-16
申请号：US759973
申请日：1996-12-03
申请人： Seiji Higurashi
发明人： Seiji Higurashi
IPC分类号： G11B5/027 , G11B5/008 , G11B20/10 , G11B20/12 , G11B21/10 , G11B27/28 , G11B27/30 , G11B5/09 , G11B15/18
CPC分类号： G11B27/3063 , G11B20/10 , G11B20/1208 , G11B5/0086
摘要： Data is recorded over tracks formed on a tape storage medium at a predetermined track pitch selected from a plurality of track pitches. The selected predetermined track pitch is larger than the minimum track pitch among the plurality of track pitches. First absolute addresses of tracks formed by the minimum track pitch are decided. Second absolute addresses of tracks formed by the predetermined track pitch are decided using the first absolute addresses. The data and the second absolute addresses are recorded over the tracks formed by the predetermined track pitch. In decision of the second absolute values, a value of (n-m) high order bits of n bits of each of the second absolute addresses is increased per track formed by the predetermined track pitch, where n is a natural number of two or more and m is another natural number of one or more but smaller than n. The first absolute addresses are also expressed by the n and m bits. Values of the m low order bits of the first absolute addresses are set as values of the m low order bits of the second absolute addresses.
摘要翻译：数据以从多个轨道间距中选择的预定轨道间距记录在磁带存储介质上形成的磁道上。所选择的预定轨道间距大于多个轨道间距中的最小轨道间距。确定由最小轨道间距形成的轨道的第一绝对地址。使用第一绝对地址来确定由预定轨道间距形成的轨道的第二绝对地址。数据和第二绝对地址被记录在由预定轨道间距形成的轨道上。在第二绝对值的判定中，每个第二绝对地址的n位的（nm）高位数值由预定轨道间距形成的轨迹增加，其中n是两个或更多个的自然数，m 是一个或多个但小于n的另一个自然数。第一绝对地址也由n位和m位表示。将第一绝对地址的m个低阶位的值设置为第二绝对地址的m个低阶位的值。

53. 发明授权

US5948118A Error detection code forming method and apparatus 失效
标题翻译：错误检测码形成方法和装置
公开(公告)号：US5948118A
公开(公告)日：1999-09-07
申请号：US721963
申请日：1996-09-27
申请人： Seiji Higurashi , Takeo Ohishi
发明人： Seiji Higurashi , Takeo Ohishi
IPC分类号： G06F11/10 , G11B20/18 , H03M13/00 , H03M13/15 , H04L1/00
CPC分类号： H03M13/15
摘要： Identification (ID) error detection codes are formed which are synchronized at least with ID data and digital data of fixed length. The ID data are firstly separated into four-bit units of data. A first data is added to each separated four-bit unit of data. The data to which the first data is added is delayed by a period corresponding to each four-bit data. Further, a second data is added to the delayed data. The data to which the second data is added is delayed by the period corresponding to each four-bit unit of data. The delayed data to which the second data is added is multiplied by a coefficient .alpha..sup.4 related to a Galois Field (2.sup.4) to generate the second data. Further, the delayed data to which the second data is added is multiplied by a coefficient .alpha. related to the Galois Field (2.sup.4) to generate the first data. Four-bit Reed-Solomon codes defined on the Galois Field (2.sup.4) is thus formed. The Reed-Solomon codes become the ID data error detection codes.
摘要翻译：形成识别（ID）错误检测码，其至少与ID数据和固定长度的数字数据至少同步。首先将ID数据分成四位数据单元。第一个数据被添加到每个分离的四位数据单元。添加第一数据的数据被延迟与每个四位数据对应的周期。此外，第二数据被添加到延迟数据。添加第二数据的数据被延迟与每个四位数据单位对应的周期。加上第二数据的延迟数据乘以与伽罗瓦域（24）相关的系数α4，以产生第二数据。此外，将与第二数据相加的延迟数据乘以与伽罗瓦域（24）相关的系数α以产生第一数据。因此形成了在伽罗瓦域（24）上定义的四比特里德 - 所罗门码。 Reed-Solomon码成为ID数据错误检测码。

54. 发明授权

US5822140A Digital address information recording method for recording absolute address together with information signal on recording medium 失效
标题翻译：用于将绝对地址与信息信号一起记录在记录介质上的数字地址信息记录方法
公开(公告)号：US5822140A
公开(公告)日：1998-10-13
申请号：US739555
申请日：1996-10-30
申请人： Seiji Higurashi
发明人： Seiji Higurashi
IPC分类号： G11B20/12 , G11B20/18 , G11B27/28 , G11B27/30 , G11B5/09 , G11B15/18
CPC分类号： G11B27/3027 , G11B20/1207 , G11B27/3063
摘要： A method of recording an information signal on a recording medium. The method includes recording of first flag indicating an absolute address being continuous without overlapping, second flag indicating the absolute address having a probability of discontinuity without overlapping, third flag indicating the absolute address having a probability of overlapping, and fourth flag indicating the absolute address being absent. And one of the first through fourth flags is recorded with the absolute address.
摘要翻译：一种在记录介质上记录信息信号的方法。该方法包括记录指示绝对地址不重叠的第一标志，指示绝对地址具有不重叠概率的绝对地址的第二标志，指示具有重叠概率的绝对地址的第三标志，以及指示绝对地址为第缺席。第一个到第四个标志之一用绝对地址记录。

55. 发明授权

US5124852A Magnetic tape recording apparatus 失效
标题翻译：磁带录音机
公开(公告)号：US5124852A
公开(公告)日：1992-06-23
申请号：US603498
申请日：1990-10-26
申请人： Tetsuya Suwa , Hiroshi Nishiumi , Seiji Higurashi
发明人： Tetsuya Suwa , Hiroshi Nishiumi , Seiji Higurashi
IPC分类号： H04N5/782 , H04N9/835
CPC分类号： H04N9/8355 , H04N5/78213
摘要： A digital audio signal is subjected to predetermined modulation using a predetermined carrier, and thereby the digital audio signal is converted into a modulated digital audio signal. An FM audio signal is generated. The modulated digital audio signal and the FM audio signal are combined into a composite audio signal. The composite audio signal is superimposed on a high-frequency bias signal, and thereby the composite audio signal is converted into a final modulated audio signal. The final modulated audio signal is recorded into a magnetic tape. A predetermined basic signal is generated. The predetermined carrier and the bias signal are generated from the basic signal. The predetermined carrier and the bias signal have a predetermined frequency relation which is chosen in dependence upon a frequency of beats caused by cross modulation between the modulated digital audio signal and the bias signal.

56. 发明授权

US5027229A Magnetic recording apparatus and magnetic recording/reproducing apparatus 失效
标题翻译：磁记录装置和磁记录/重放装置
公开(公告)号：US5027229A
公开(公告)日：1991-06-25
申请号：US327266
申请日：1989-03-22
申请人： Tetsuya Suwa , Seiji Higurashi
发明人： Tetsuya Suwa , Seiji Higurashi
IPC分类号： H04N5/928 , G11B5/02 , G11B20/10 , H04N5/782 , H04N9/835
CPC分类号： G11B20/10046 , G11B20/10 , G11B20/10009 , G11B20/10527 , H04N5/78213 , H04N9/8355 , G11B2020/10546
摘要： There is provided a magnetic recording/reproduction apparatus adapted to record/reproduce a video signal, a digital signal, and a FM audio signal at the surface layer portion of the magnetic layer of a magnetic tape, the intermediate layer portion thereof, and the lower layer portion thereof, respectively. This apparatus is provided with on the recording side thereof, a first modulator for generating a frequency modulated audio signal, a first rotary head for recording the audio signal from the first modulator at a lower layer portion of the magnetic tape, a second modulator for generating a digital signal having undergone, a poly-phase differential phase shift modulation, an amplitude change elimination circuit such as a limiter for eliminating changes in the amplitude of the digital signal from the second modulator, a second rotary head for recording the digital signal from the second modulator at an intermediate layer portion thereof, a video signal processing circuit for processing a video signal, and a third rotary head for recording the video signal from the video signal processing circuit at a upper layer portion thereof. This apparatus is also provided on the reproduction side, with a circuit configuration corresponding to the above-mentioned circuit configuration on the recording side in order to satisfactorily reproduce the above-mentioned three kinds of recorded signals.

57. 发明授权

US07124434B2 Information transmission system, and information sending apparatus and information receiving apparatus used therein 有权
标题翻译：信息传输系统以及其中使用的信息发送装置和信息接收装置
公开(公告)号：US07124434B2
公开(公告)日：2006-10-17
申请号：US10869847
申请日：2004-06-18
申请人： Seiji Higurashi
发明人： Seiji Higurashi
IPC分类号： G06F7/04
CPC分类号： H04L9/0869 , H04L9/0844 , H04L9/12
摘要： A receiver sends a first random number to a transmitter. The transmitter generates a sync signal in response to the first random number sent from the receiver. The transmitter embeds the sync signal and key information in a second random number to generate a composite signal. In the composite signal, the sync signal is a position indicator for the key information. The transmitter sends the composite signal to the receiver. The transmitter generates an encryption key from the key information. The receiver detects the sync signal in the composite signal sent from the transmitter. The receiver extracts the key information from the composite signal in response to the detected sync signal. The receiver generates an encryption key from the extracted key information. The encryption key generated by the receiver is equal to that generated by the transmitter. Thus, the transmitter and the receiver hold the same encryption key in common.
摘要翻译：接收机向发射机发送第一个随机数。发射机响应于从接收机发送的第一随机数生成同步信号。发射机将同步信号和密钥信息嵌入第二随机数，以产生复合信号。在复合信号中，同步信号是密钥信息的位置指示符。发射机将复合信号发送到接收机。发射机从密钥信息生成加密密钥。接收机检测从发射机发送的复合信号中的同步信号。接收机响应于检测到的同步信号从复合信号中提取密钥信息。接收机从所提取的密钥信息生成加密密钥。由接收机产生的加密密钥等于由发射机产生的加密密钥。因此，发射机和接收机保持相同的加密密钥。

58. 发明授权

US06560401B1 Method and apparatus for recording and reproducing information 失效
标题翻译：用于记录和再现信息的方法和装置
公开(公告)号：US06560401B1
公开(公告)日：2003-05-06
申请号：US09394687
申请日：1999-09-13
申请人： Seiji Higurashi , Yasuaki Yamada
发明人： Seiji Higurashi , Yasuaki Yamada
IPC分类号： H04N593
CPC分类号： G11B27/107 , G11B20/10527 , G11B27/032 , G11B27/036 , G11B2220/90
摘要： An information recording and reproducing apparatus includes a memory for storing a signal whose amount corresponds to a minimum recording unit. First data is reproduced from a minimum-recording-unit corresponding portion of a recording medium. The minimum-recording-unit corresponding portion contains a designated editing point. The reproduced first data is stored into the memory. A boundary between frames represented by the first data in the memory is detected. The detected boundary corresponds to the editing point. An address of a storage segment in the memory is stored which corresponds to the detected boundary. A first portion of the first data in the memory which corresponds to the stored address and later addresses is replaced by second data while a second portion of the first data in the memory which corresponds to addresses preceding the stored address is left to generate third data composed of the second data and the second portion of the first data in the memory. The third data is recorded on the minimum-recording-unit corresponding portion of the recording medium.
摘要翻译：信息记录和再现装置包括用于存储其量对应于最小记录单元的信号的存储器。从记录介质的最小记录单元对应部分再现第一数据。最小记录单元对应部分包含指定的编辑点。再现的第一数据被存储到存储器中。检测由存储器中的第一数据表示的帧之间的边界。检测到的边界对应于编辑点。存储存储器中的存储段的地址对应于检测到的边界。存储器中对应于存储的地址和后续地址的第一数据的第一部分被第二数据替换，而存储器中对应于存储地址之前的地址的第一数据的第二部分被留下以产生组成的第三数据的第二数据和第二数据的第二部分。第三数据被记录在记录介质的最小记录单元对应部分上。

59. 发明授权

US06525776B1 Information compressing apparatus and method 有权
标题翻译：信息压缩装置及方法
公开(公告)号：US06525776B1
公开(公告)日：2003-02-25
申请号：US09363093
申请日：1999-07-30
申请人： Seiji Higurashi
发明人： Seiji Higurashi
IPC分类号： H04N504
CPC分类号： H04N19/85
摘要： An information processing apparatus includes an address generation circuit for generating an address signal. A memory operates for storing an information signal containing a video signal in response to the address signal. The address signal is periodically updated. A compression processing circuit operates for reading out the information signal from the memory, and subjecting the readout information signal to a compressively encoding process. A head of every frame represented by the information signal is detected. A state of the address signal is stored which corresponds to the detected frame head. Detection is made as to whether or not the information signal becomes discontinuous. The updating of the address signal and also the operation of the compression processing circuit are suspended when it is detected that the information signal becomes discontinuous. Detection is made as to whether or not the information signal returns to a normally continuous state after the information signal becomes discontinuous. The updating of the address is started from the stored state when it is detected that the information signal returns to its normally continuous state after the information signal becomes discontinuous.
摘要翻译：信息处理装置包括用于产生地址信号的地址产生电路。存储器用于响应于地址信号存储包含视频信号的信息信号。定期更新地址信号。压缩处理电路用于从存储器读出信息信号，并对读出的信息信号进行压缩编码处理。检测由信息信号表示的每帧的头部。存储对应于检测到的帧头的地址信号的状态。检测信息信号是否不连续。当检测到信息信号变得不连续时，地址信号的更新以及压缩处理电路的操作被暂停。在信息信号变得不连续之后，检测信息信号是否恢复正常连续状态。当信息信号变得不连续时，当检测到信息信号恢复到其正常连续状态时，地址的更新从存储状态开始。

60. 发明授权

US06201926B1 Apparatus for recording digital picture signal 失效
标题翻译：用于记录数字图像信号的装置
公开(公告)号：US06201926B1
公开(公告)日：2001-03-13
申请号：US08998594
申请日：1997-12-29
申请人： Yumi Yoshida , Yasuhiko Teranishi , Seiji Higurashi
发明人： Yumi Yoshida , Yasuhiko Teranishi , Seiji Higurashi
IPC分类号： H04N5783
CPC分类号： H04N21/434 , H04N19/115 , H04N19/132 , H04N19/137 , H04N19/146 , H04N19/149 , H04N19/18 , H04N19/60 , H04N21/236
摘要： Code words, which correspond to orthogonal-transform-resultant coefficients having order numbers equal to or higher than an order number “n+1”, are deleted from code words composing each 1-intra-frame segment of an input digital picture signal to generate special picture data with a frame period NS on the basis of the input digital picture signal. Estimation is made as to a code amount CF(nmin) of special picture data generated by deleting code words, which correspond to orthogonal-transform-resultant coefficients having order numbers equal to or higher than an order number “nmin+1”, from code words composing a 1-intra-frame segment of the input digital picture signal, where “nmin” denotes a lower limit of an order number “n”. The frame period NS of the special picture data and a target code amount C are decided so that the estimated code amount CF(nmin) will be equal to or smaller than the target code amount C. The input digital picture signal is recorded on a recording medium. The special picture data is recorded on predetermined positions in the recording medium.
摘要翻译：对应于具有等于或高于订单号“n + 1”的订货号的正交变换合成系数的代码字从构成输入数字图像信号的每个1-帧内段的码字中删除，以产生基于输入的数字图像信号的具有帧周期NS的特殊图像数据。对代码量的编码量CF（nmin）进行估计，该特征图像数据是通过删除代码字而产生的，该代码字对应于具有等于或高于订单号“nmin + 1”的订单号的正交变换合成系数构成输入数字图像信号的1帧内片段的单词，其中“nmin”表示订单号“n”的下限。决定特殊图像数据的帧周期NS和目标代码量C，使得估计代码量CF（nmin）将等于或小于目标代码量C.输入的数字图像信号被记录在记录中。特殊图像数据被记录在记录介质中的预定位置上。

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