-
1.发明授权
公开(公告)号：US4646301A
公开(公告)日：1987-02-24
申请号：US665378
申请日：1984-10-26
CPC分类号： G11B20/1809 , G06F11/10 , H03M13/29
摘要： Error correction of digital signals is suited for codes having error detection and correction words, such as doubly-encoded Reed-Solomon code. In a first decoding, at least error detection is effected and flags indicating decoding conditions are added. In a second decoding, error detection for first code blocks and error correction for S2 words at unknown locations and E flagged word erasures, where d1 is a Hamming distance and S2 and E satisfy a relation of 2S2+E.ltoreq.d1-1, are parallely or sequentially effected, and a combination of S2 and E having a high correction capability and a low probability of miscorrection is selected from a plurality of correction results of error locations and the numbers of flags added at the first decoding, and the word errors are corrected based on the selected combination.
摘要翻译： 数字信号的纠错适用于具有错误检测和纠错字的代码，例如双重编码的里德 - 所罗门码。 在第一解码中，至少进行错误检测，并且添加指示解码条件的标志。 在第二解码中，用于第一代码块的错误检测和未知位置处的S2字的错误检测和E标记的字擦除，其中d1是汉明距离，S2和E满足2S2 + E 的关系， 平行或顺序地实现，并且从错误位置的多个校正结果和在第一次解码时添加的标志数量，选择具有高校正能力和低错误概率的S2和E的组合，并且单词错误 根据所选择的组合进行校正。
-
2.发明授权PCM signal recording and reproducing apparatus including simultaneous error detection/correction 失效PCM信号记录和再现装置，包括同时的错误检测/校正
公开(公告)号：US4758902A
公开(公告)日：1988-07-19
申请号：US886235
申请日：1986-07-16
CPC分类号： G11B20/1809 , G11B20/10527 , G11B5/86
摘要： A PCM signal recording and reproducing apparatus comprises first and second memory circuits, in which PCM signals are read and written using the first memory circuit, while PCM signals stored in the second memory circuit are error-corrected. At the end of writing by the first memory circuit, the first and second memory circuits are interchanged to read the error-corrected PCM signals stored in the second memory circuit. The read-out error-corrected PCM signals are then recorded on another magnetic tape.
摘要翻译： PCM信号记录和再现装置包括第一和第二存储器电路，其中使用第一存储器电路读取和写入PCM信号，而存储在第二存储器电路中的PCM信号被纠错。 在由第一存储器电路写入结束时，互换第一和第二存储器电路以读取存储在第二存储器电路中的经纠错的PCM信号。 然后将读出错误校正的PCM信号记录在另一个磁带上。
-
公开(公告)号：US5189564A
公开(公告)日：1993-02-23
申请号：US321778
申请日：1989-03-10
申请人： Nobutaka Amada , Takaharu Noguchi , Hiroyuki Kimura , Masaharu Kobayashi , Takao Arai , Yasufumi Yumde , Kuniaki Miura
发明人： Nobutaka Amada , Takaharu Noguchi , Hiroyuki Kimura , Masaharu Kobayashi , Takao Arai , Yasufumi Yumde , Kuniaki Miura
IPC分类号： G11B20/10 , H04L27/18 , H04L27/227
CPC分类号： H04L27/2082 , G11B20/10 , H04L27/227
摘要： In an information recording/reproducing apparatus for recording/reproducing a digital audio signal on/from a magnetic medium, a modulator/demodulator for modulating/demodulating the digital signal by offset quadrature phrase shift keying (O-QPSK). This technique is particularly applicable to the multi-layer recording of video and audio signals in a video tape recording/reproducing system and has the advantage of avoiding interference between the recorded digital audio and video signals at the time of reproduction.
摘要翻译： 在用于在磁介质上记录/再现数字音频信号的信息记录/再现装置，用于通过偏移正交短语移位键控（O-QPSK）来调制/解调数字信号的调制器/解调器。 该技术特别适用于视频磁带记录/再现系统中的视频和音频信号的多层记录，并且具有在再现时避免记录的数字音频和视频信号之间的干扰的优点。
-
4.发明授权Apparatus for recording and reproducing video signal and digital signal other than video signal 失效用于记录和再现除视频信号之外的视频信号和数字信号的装置
公开(公告)号：US4758903A
公开(公告)日：1988-07-19
申请号：US800147
申请日：1985-11-20
申请人： Takaharu Noguchi , Hiroyuki Kimura , Masaharu Kobayashi , Yasufumi Yunde , Takao Arai , Nobutaka Amada , Kuniaki Miura
发明人： Takaharu Noguchi , Hiroyuki Kimura , Masaharu Kobayashi , Yasufumi Yunde , Takao Arai , Nobutaka Amada , Kuniaki Miura
CPC分类号： H04N9/802 , H04N5/78213 , H04N9/7933 , H04N9/8233 , H04N9/8355
摘要： In a recording and reproducing apparatus wherein a video signal and an audio signal are recorded on the same recording track, a signal subjected to a quadrature differential PSK modulation with PCM audio signal is generated as an audio recording signal. The audio recording signal is disposed between occupied bands of FM luminance signal and down converted chrominance signal in a video recording signal and also recorded on a track where the video recording signal is to be recorded.
摘要翻译： 在其中将视频信号和音频信号记录在同一记录磁道上的记录和再现装置中，产生经PCM音频信号的正交差分PSK调制的信号作为音频记录信号。 音频记录信号被布置在视频记录信号中的FM亮度信号的被占用频带和下变频色度信号之间，并且还记录在要记录视频记录信号的磁道上。
-
公开(公告)号：US4562549A
公开(公告)日：1985-12-31
申请号：US434058
申请日：1982-10-13
申请人： Hiromichi Tanaka , Hiroyuki Kimura , Tsutomu Noda , Takao Arai , Masaharu Kobayashi , Shigeki Inoue
发明人： Hiromichi Tanaka , Hiroyuki Kimura , Tsutomu Noda , Takao Arai , Masaharu Kobayashi , Shigeki Inoue
IPC分类号： G01R29/027 , G11B19/28 , G11B20/10 , H03K5/01 , H03K5/22
CPC分类号： G11B19/28 , G01R29/0273 , G11B20/10 , Y10S388/912 , Y10S388/916
摘要： In a pulse width detector circuit, a high-level pulse width and a low-level pulse width of a digital signal derived by slicing an analog signal reproduced from a disc at a predetermined level are independently measured and maximum or minimum values thereof in a predetermined time interval are stored, and an average value, sum or difference of the maximum or minimum high-level pulse width and the maximum or minimum low-level pulse width is calculated to detect a correct pulse width of original data recorded on the disc.
摘要翻译： 在脉冲宽度检测电路中，独立地测量通过将从盘再现的模拟信号以预定水平进行分片而得到的数字信号的高电平脉冲宽度和低电平脉冲宽度，并且其预定的最大值或最小值 存储时间间隔，并且计算最大或最小高电平脉冲宽度与最大或最小低电平脉冲宽度的平均值，和或差，以检测记录在盘上的原始数据的正确脉冲宽度。
-
公开(公告)号：US4238770A
公开(公告)日：1980-12-09
申请号：US79252
申请日：1979-09-27
摘要： There is disclosed a vertical synchronizing signal detector circuit for use with a PCM recording/reproducing system which records and reproduces audio signals with pulse code modulation by the use of a home VTR system or a part thereof. The vertical synchronizing signal detector circuit comprises an input terminal for receiving a composite synchronizing signal including a horizontal synchronizing signal and a vertical synchronizing signal, an output terminal for providing a vertical synchronizing pulse synchronized with the vertical synchronizing signal, a clock pulse generator circuit connected to the input terminal and adapted to generate a clock pulse having half the period of the horizontal synchronizing signal and a phase lag therefrom of one-fourth the period thereof, a vertical synchronizing signal extractor circuit connected to the input terminal and the clock pulse generator circuit and adapted to compare the vertical synchronizing signal with a reference waveform pattern for the vertical synchronizing signal so as to generate a vertical synchronizing signal output synchronized with the vertical synchronizing signal only when the comparison results in a complete coincidence, and a vertical synchronizing signal compensator circuit connected to the vertical synchronizing signal extractor circuit and the clock pulse generator circuit and responsive to the vertical synchronizing signal output to provide this output at the output terminal and simultaneously store the same temporarily, the vertical synchronizing signal compensator circuit being also adapted to provide the stored vertical synchronizing signal output at the output terminal when the vertical synchronizing signal output is not received, whereby the vertical synchronizing pulse is produced at correct timing even if the vertical synchronizing signal is absent in the composite synchronizing signal because of a dropout or the like.
摘要翻译： 公开了一种与PCM记录/再现系统一起使用的垂直同步信号检测器电路，其通过使用家用VTR系统或其一部分来记录和再现具有脉冲编码调制的音频信号。 垂直同步信号检测电路包括：输入端子，用于接收包括水平同步信号和垂直同步信号的复合同步信号;输出端，用于提供与垂直同步信号同步的垂直同步脉冲;时钟脉冲发生器电路，连接到 所述输入端子适于产生具有所述水平同步信号的一半周期的时钟脉冲及其四分之一周期的相位滞后;垂直同步信号提取器电路，连接到所述输入端子和所述时钟脉冲发生器电路;以及 适于将垂直同步信号与用于垂直同步信号的参考波形图案进行比较，以便仅当比较导致完全符合时产生与垂直同步信号同步的垂直同步信号，并且垂直同步信号 l补偿电路连接到垂直同步信号提取器电路和时钟脉冲发生器电路，并且响应于垂直同步信号输出以在输出端提供该输出并同时暂时存储，垂直同步信号补偿器电路还适于 当没有接收到垂直同步信号输出时，在输出端提供所存储的垂直同步信号，由此，即使在复合同步信号中缺少垂直同步信号，因此在正确定时产生垂直同步脉冲， 喜欢。
-
公开(公告)号：US08165453B2
公开(公告)日：2012-04-24
申请号：US11899648
申请日：2007-09-06
申请人： Akio Fukushima , Hiroyuki Kimura , Hiroo Okamoto
发明人： Akio Fukushima , Hiroyuki Kimura , Hiroo Okamoto
IPC分类号： H04N9/80
CPC分类号： H04N9/8042 , H04N5/85 , H04N5/913 , H04N2005/91335
摘要： A data reproduction method and apparatus includes first circuitry to produce an information signal from a storage medium. The information signal includes copy control information. Detection circuitry is provided to detect the copy control information. Control circuitry is provided to operate the first circuitry to selectively output the information signal based on the detection result of the detection circuitry.
摘要翻译： 数据再现方法和装置包括从存储介质产生信息信号的第一电路。 信息信号包括复制控制信息。 提供检测电路以检测复制控制信息。 提供控制电路以操作第一电路以基于检测电路的检测结果选择性地输出信息信号。
-
公开(公告)号：US20080008446A1
公开(公告)日：2008-01-10
申请号：US11899648
申请日：2007-09-06
申请人： Akio Fukushima , Hiroyuki Kimura , Hiroo Okamoto
发明人： Akio Fukushima , Hiroyuki Kimura , Hiroo Okamoto
CPC分类号： H04N9/8042 , H04N5/85 , H04N5/913 , H04N2005/91335
摘要： A data reproduction method and apparatus includes first circuitry to produce an information signal from a storage medium. The information signal includes copy control information. Detection circuitry is provided to detect the copy control information. Control circuitry is provided to operate the first circuitry to selectively output the information signal based on the detection result of the detection circuitry.
摘要翻译： 数据再现方法和装置包括从存储介质产生信息信号的第一电路。 信息信号包括复制控制信息。 提供检测电路以检测复制控制信息。 提供控制电路以操作第一电路以基于检测电路的检测结果选择性地输出信息信号。
-
9.发明授权Method and apparatus for temporarily giving copy permission for reproducing digital signals 有权暂时给予复制数字信号复制许可的方法和装置公开(公告)号：US07151888B2
公开(公告)日：2006-12-19
申请号：US09839694
申请日：2001-04-19
IPC分类号： H04N5/76
CPC分类号： G11B20/00746 , G11B20/00086 , G11B20/0084
摘要： The digital signal recording/reproducing apparatus inputs a digital signal having a control flag as to a temporary copy permission, and records the digital signal temporarily into a recording medium in accordance with conditions in the control flag, then reproducing the digital signal temporarily from the recording medium in accordance with the conditions in the control flag. The recording/reproducing of the temporary copy is permitted, depending on the following conditions: The recording medium's type, the re-producing point-in-time, the reproducing time-period, and the reproducing frequency. With this method employed, even in a program permitting no recording, the temporary recording/reproducing is permitted under a condition of being limited to the time-shift recording on the receiving side.
摘要翻译： 数字信号记录/再现装置输入具有临时复制许可的控制标志的数字信号，并根据控制标志的条件将数字信号临时记录到记录介质中，然后从记录中临时再现数字信号 介质按照控制标志的条件。 根据以下条件允许临时副本的记录/再现：记录介质的类型，重新产生时间点，再现时间段和再现频率。 采用这种方法，即使在不允许记录的程序中，在被限制在接收侧的时移记录的条件下允许临时记录/再现。
-
公开(公告)号：US08346061B2
公开(公告)日：2013-01-01
申请号：US11400675
申请日：2006-04-07
IPC分类号： H04N9/80
CPC分类号： G11B20/00746 , G11B20/00086 , G11B20/0084
摘要： The digital signal recording/reproducing apparatus inputs a digital signal having a control flag as to a temporary copy permission, and records the digital signal temporarily into a recording medium in accordance with conditions in the control flag, then reproducing the digital signal temporarily from the recording medium in accordance with the conditions in the control flag. The recording/reproducing of the temporary copy is permitted, depending on the following conditions: The recording medium's type, the reproducing point-in-time, the reproducing time-period, and the reproducing frequency. With this method employed, even in a program permitting no recording, the temporary recording/reproducing is permitted under a condition of being limited to the time-shift recording on the receiving side.
摘要翻译： 数字信号记录/再现装置输入具有临时复制许可的控制标志的数字信号，并根据控制标志的条件将数字信号临时记录到记录介质中，然后从记录中临时再现数字信号 介质按照控制标志的条件。 根据以下条件允许临时拷贝的记录/再现：记录介质的类型，再现时间点，再现时间段和再现频率。 采用这种方法，即使在不允许记录的程序中，在被限制在接收侧的时移记录的条件下允许临时记录/再现。
-
-
-
-
-
-
-
-
-
搜索结果
275 条记录 (耗时 0.031 秒)