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1. 发明授权

US4614934A Digital-to-analog converter device for processing PCM signals of different sampling frequencies 失效
标题翻译：用于处理不同采样频率的PCM信号的数模转换器
公开(公告)号：US4614934A
公开(公告)日：1986-09-30
申请号：US578787
申请日：1984-02-10
申请人： Masaharu Kobayashi , Takaharu Noguchi , Keizo Nishimura , Hiromichi Tanaka , Masami Nishida , Takao Arai
发明人： Masaharu Kobayashi , Takaharu Noguchi , Keizo Nishimura , Hiromichi Tanaka , Masami Nishida , Takao Arai
IPC分类号： H03M1/66 , H03M1/00 , H04B14/04
CPC分类号： H04B14/04 , H03M1/0631
摘要： A digital-to-analog converter device for PCM signals at different sampling frequencies comprises a signal converter which expands the frequency distance between a PCM signal band and a side band by converting the sampling frequencies associated with the PCM signals to be reproduced into higher frequencies. With this signal converter, a single low-pass filter can be simplified, having a gradual ramp cut-off characteristic for removal of the side band wherein a pass band cut-off frequency and a stop band cut-off frequency can be adapted for low pass filtering of the PCM signals at different sampling frequencies.
摘要翻译：用于不同采样频率的PCM信号的数模转换器装置包括通过将与要再现的PCM信号相关联的采样频率转换为更高频率来扩展PCM信号频带和边带之间的频率距离的信号转换器。利用该信号转换器，可以简化单个低通滤波器，具有用于去除边带的逐渐斜坡截止特性，其中通带截止频率和阻带截止频率可适应于低以不同的采样频率对PCM信号进行滤波。

2. 发明授权

US4670796A Rotary head type PCM recorder 失效
标题翻译：旋转头式PCM录音机
公开(公告)号：US4670796A
公开(公告)日：1987-06-02
申请号：US625235
申请日：1984-06-27
申请人： Masaharu Kobayashi , Takaharu Noguchi , Takao Arai , Michio Masuda , Yasufumi Yumde
发明人： Masaharu Kobayashi , Takaharu Noguchi , Takao Arai , Michio Masuda , Yasufumi Yumde
IPC分类号： G11B20/12 , G11B5/008 , G11B5/09 , G11B5/53 , G11B20/10 , G11B20/18 , H04N5/7826 , H04N5/926 , H04N9/806 , H04N9/79 , H04N5/782
CPC分类号： H04N5/78263 , G11B20/10527 , G11B20/1809 , G11B5/0086 , G11B5/00865 , G11B5/531 , H04N5/926 , H04N5/9268 , H04N9/8063
摘要： The recording area of the magnetic tape is divided into a first area for recording a PCM converted audio signal and a second area for recording a PCM converted video information. In recording the audio signal and the video information which have been separately PCM converted, the magnetic tape is wrapped around the rotary heads so that a wrap angle of each of said first and second areas is less than 90.degree. with respect to the rotary heads of a predetermined diameter.
摘要翻译：磁带的记录区域被分成用于记录PCM转换的音频信号的第一区域和用于记录PCM转换的视频信息的第二区域。在记录已经单独PCM转换的音频信号和视频信息时，磁带被卷绕在旋转磁头上，使得所述第一和第二区域中的每一个的包角相对于旋转磁头的旋转磁头小于90度预定直径。

3. 发明授权

US4646301A Decoding method and system for doubly-encoded Reed-Solomon codes 失效
标题翻译：用于双重编码的里德 - 所罗门码的解码方法和系统
公开(公告)号：US4646301A
公开(公告)日：1987-02-24
申请号：US665378
申请日：1984-10-26
申请人： Hiroo Okamoto , Masaharu Kobayashi , Hiroyuki Kimura , Takaharu Noguchi , Takao Arai
发明人： Hiroo Okamoto , Masaharu Kobayashi , Hiroyuki Kimura , Takaharu Noguchi , Takao Arai
IPC分类号： H04L1/00 , G06F11/10 , G11B20/18 , H03M13/00 , H03M13/27 , H03M13/29
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。

4. 发明授权

US4912574A Apparatus for recording digital signal 失效
标题翻译：用于记录数字信号的装置
公开(公告)号：US4912574A
公开(公告)日：1990-03-27
申请号：US179305
申请日：1988-04-08
申请人： Masaharu Kobayashi , Takao Arai , Takaharu Noguchi
发明人： Masaharu Kobayashi , Takao Arai , Takaharu Noguchi
IPC分类号： G11B15/087 , G11B15/18 , G11B15/48 , G11B20/12 , G11B20/18 , G11B27/032
CPC分类号： G11B20/18 , G11B15/087 , G11B15/1875 , G11B15/48 , G11B20/1208 , G11B27/032 , G11B2220/90 , G11B2220/913
摘要： The present invention relates to an apparatus for recording a digitized signal. If a recording apparatus is switched from a recording mode to a non-recording mode and then switched from the non-recording mode to a recording mode, there is produced a portion between two records where the records are not continuous. When such a portion is reproduced, abnormal data come to be reproduced because of existence of discontinuity between the prior and subsequent data. And, if a digital audio signal is similarly recorded, it follows that an abnormal sound is generated when such a portion is reproduced. Then, by recording an anti-format signal in the discontinuous portion, the reproduction of abnormal data or generation of abnormal sound can be prevented from occurring.
摘要翻译：本发明涉及用于记录数字化信号的装置。如果记录装置从记录模式切换到非记录模式，然后从非记录模式切换到记录模式，则在记录不连续的两个记录之间产生一部分。当再现这样的部分时，由于存在先前和后续数据之间的不连续性，异常数据将被再现。并且，如果数字音频信号被类似地记录，则当再现这样的部分时，产生异常声音。然后，通过在不连续部分中记录反格式信号，可以防止异常数据的再现或异常声音的产生。

5. 发明授权

US4677622A Error correction method and system 失效
标题翻译：纠错方法和系统
公开(公告)号：US4677622A
公开(公告)日：1987-06-30
申请号：US622711
申请日：1984-06-20
申请人： Hiroo Okamoto , Masaharu Kobayashi , Keizo Nishimura , Takaharu Noguchi , Takao Arai , Toshifumi Shibuya
发明人： Hiroo Okamoto , Masaharu Kobayashi , Keizo Nishimura , Takaharu Noguchi , Takao Arai , Toshifumi Shibuya
IPC分类号： G11B20/18 , G06F11/10
CPC分类号： G11B20/1809
摘要： This invention relates to an error correction upon reproduction of digital signals. The error correction is performed by decoding code words such as cross-interleaved Reed Solomon codes, in which first code blocks are formed by a plurality of information words which are in the first arrangement state and a plurality of first check words which are produced by codes associated with the plurality of information words with a Hamming distance of d.sub.1, and second code blocks are formed by a plurality of information words and a plurality of first check words which are in the second arrangement state and which consist of the said plurality of information words and the said plurality of first check words which are respectively included in the different first code blocks, and by a plurality of second check words which are produced by codes associated with the plurality of information words and the plurality of first check words with a Hamming distance of d.sub.2. At the first decoding stage, errors are detected and at the same time the flags indicative of the decoding states are added with respect to the second code blocks. At the second decoding stage, in accordance with the contents of the flags and on the basis of a combination of p.sub.2 and q selected from their combinations satisfying 2p.sub.2 +q.ltoreq.d.sub.1 -1, errors are detected and errors of p.sub.2 words are corrected and erasures of q words to which the flags were added are corrected with respect to the first code blocks.
摘要翻译：本发明涉及数字信号再现时的纠错。通过解码诸如交叉交织的里德·所罗门码的码字来执行纠错，其中第一码块由处于第一布置状态的多个信息字形成，并且由代码产生的多个第一检查字与具有汉明距离d1的多个信息字相关联，第二码块由处于第二布置状态的多个信息字和多个第一检查词形成，并且由所述多个信息字组成以及分别包含在不同的第一代码块中的所述多个第一校验字以及由与多个信息字相关联的代码产生的多个第二校验字和具有汉明距离的多个第一校验字的d2。在第一解码阶段，检测到错误，并且同时相对于第二代码块添加指示解码状态的标志。在第二解码阶段，根据标志的内容，并且基于从满足2p2 + q·d1-1的组合中选择的p2和q的组合，检测出错误并校正p2个字的错误并且相对于第一代码块校正添加了标志的q个字的擦除。

6. 发明授权

US4622600A Rotary-head type PCM data recording/reproducing method and apparatus with a redundancy-reduced control data format 失效
标题翻译：旋转头型PCM数据记录/再现方法和具有冗余减少的控制数据格式的装置
公开(公告)号：US4622600A
公开(公告)日：1986-11-11
申请号：US685551
申请日：1984-12-24
申请人： Hiroo Okamoto , Masaharu Kobayashi , Takaharu Noguchi , Takao Arai
发明人： Hiroo Okamoto , Masaharu Kobayashi , Takaharu Noguchi , Takao Arai
IPC分类号： G11B20/10 , G11B20/12 , G11B20/18 , G11B27/30 , G11B5/09
CPC分类号： G11B20/1208 , G11B20/10527 , G11B20/1803 , G11B20/1813 , G11B27/3027 , G11B27/3063 , G11B20/1211 , G11B2020/10546 , G11B2020/10592 , G11B2220/90 , G11B2220/913
摘要： A rotary-head PCM data recorder in which PCM signals of m in number, a synchronizing signal, control signals related to the PCM signals, and a parity signal for error detection and correction are formed into data blocks, and data blocks of n in number are recorded on one track of a magnetic tape. Among the control signals, bits of signals common to n data blocks (i.e., information needed once for each track) are formed in distributed data allocated in a group of consecutive blocks or tracks, and multiple block distributive control data are recorded on one track multiple number of times, or multiple track distributive control data are recorded along n block strings a multiple number of times. In reproduction, block or track distributive data are composed to reproduce the control signals. The recorder thus arranged reduces the bit number needed for the control signals and compensates dropout of reproduced data due to scratches on the tape and the like.
摘要翻译：旋转磁头PCM数据记录器，其中m个数字的PCM信号，同步信号，与PCM信号相关的控制信号，以及用于错误检测和校正的奇偶校验信号形成数据块，数字数据n 记录在磁带的一个轨道上。在控制信号中，分配在一组连续块或轨道中的分布式数据中形成n个数据块共同的信号位（即，对于每个磁道一次需要的信息），并且多个块分布控制数据被记录在一个磁道多个次数或多个磁道分布控制数据沿着n个块串被多次记录。在再现中，构成块或轨道分布数据以再现控制信号。如此布置的记录器减少了控制信号所需的位数，并补偿了由于磁带等上的划痕而导致的再现数据的丢失。

7. 发明授权

US4617599A PCM signal recording/reproducing apparatus 失效
标题翻译： PCM信号记录/再现装置
公开(公告)号：US4617599A
公开(公告)日：1986-10-14
申请号：US620893
申请日：1984-06-15
申请人： Takaharu Noguchi , Masaharu Kobayashi , Takao Arai , Toshifumi Shibuya
发明人： Takaharu Noguchi , Masaharu Kobayashi , Takao Arai , Toshifumi Shibuya
IPC分类号： G11B5/008 , G11B5/035 , G11B5/09 , G11B15/467 , G11B20/10 , G11B20/18 , G11B5/00
CPC分类号： G11B5/09 , G11B15/4671 , G11B20/10527 , G11B20/1809 , G11B5/00878 , G11B5/035
摘要： A digital signal recording/reproducing apparatus capable of recording and reproducing digital signals having differences in respect to sampling frequency thereof and the number of quantization bits per sample by means of a common circuit arrangement includes means for varying revolution speed of rotating heads for recording and reproduction or traveling speed of a recording medium as a function of different sampling frequencies. A signal processing circuit for processing the digital signals so as to be suited for the recording on the recording medium is controlled by a clock signal of which frequency is changed in dependence on the different sampling frequencies. The signal processing circuit is arranged so that PCM data contained in a frame is constituted by a number of bits which is equal to a common multiple of the different quantization bit numbers and added with a common frame synchronizing signal and common error detection and correction codes to thereby prepare the PCM signal of the frame arrangement. The digital signals which differ in the sampling frequency and the quantization bit numbers can be recorded by same recording and reproducing apparatus with an improved efficiency with a same wavelength and in a same signal format.
摘要翻译：一种数字信号记录/再现装置，其能够记录和再现与其采样频率有差异的数字信号和通过公共电路装置的每个样本的量化位数，包括用于改变用于记录和再现的旋转磁头的转速的装置或作为不同采样频率的函数的记录介质的行进速度。用于处理适于在记录介质上进行记录的数字信号的信号处理电路由频率根据不同采样频率而变化的时钟信号控制。信号处理电路被布置成使得包含在帧中的PCM数据由等于不同量化比特数的公倍数的比特数构成，并且加上公共帧同步信号和公共错误检测和校正码从而准备帧配置的PCM信号。采样频率和量化比特数不同的数字信号可以由相同的记录和再现装置以相同的波长和相同的信号格式提高效率来记录。

8. 发明授权

US4649542A Digital signal transmission method providing high error correction capability 失效
标题翻译：数字信号传输方式提供高纠错能力
公开(公告)号：US4649542A
公开(公告)日：1987-03-10
申请号：US621743
申请日：1984-06-18
申请人： Keizo Nishimura , Masaharu Kobayashi , Hiroo Okamoto , Takaharu Noguchi , Takao Arai , Toshifumi Shibuya
发明人： Keizo Nishimura , Masaharu Kobayashi , Hiroo Okamoto , Takaharu Noguchi , Takao Arai , Toshifumi Shibuya
IPC分类号： G11B20/18 , H03M13/00 , H03M13/27 , G06F11/10
CPC分类号： G11B20/1809
摘要： A method of transmitting a digital signal in the form of successive signal frames containing codes for detecting and correcting errors of the digital signal for reducing degradation in the quality of the reproduced sound due to generation of the code errors in a digitized audio signal transmission system. An analog signal such as an audio signal is sampled and subjected to A/D conversion. The sample word thus obtained is divided into a plurality of symbol elements. Parity words for detecting and correcting code errors are added to every group of a predetermined number of the information symbols through an interleave procedure before being transmitted. The method includes the steps of applying a first frame of symbols, taken one from each input channel, and having a first arrangement state, to a first error-correcting code encoder to generate a series of first parity words; delaying each of the symbols in the first frame and each of the first parity words by a respective different delay time in a unit of the sample word at a delay line to provide a resulting second frame of symbols in a second arrangement state; applying the second frame of symbols to a second error-correcting code encoder to generate a series of second parity words; and transmitting said second frame of symbols together with said second parity words.
摘要翻译：以包含用于检测和校正数字信号的错误的代码的连续信号帧的形式发送数字信号的方法，用于减少由于数字化音频信号传输系统中的代码错误的产生而导致的再现声音质量的劣化。诸如音频信号的模拟信号被采样并进行A / D转换。由此获得的采样字被分成多个符号元素。用于检测和校正码错误的奇偶校验字在发送之前通过交织过程被添加到预定数量的信息符号的每个组中。该方法包括以下步骤：将第一帧符号从每个输入通道中取出并具有第一布置状态到第一纠错码编码器以产生一系列第一奇偶校验字; 延迟第一帧和第一奇偶校验字中的每个符号以延迟线为单位的采样字的相应的不同延迟时间，以在第二布置状态下提供所得到的第二符号帧; 将第二符号帧应用于第二纠错码编码器以产生一系列第二奇偶校验字; 以及与所述第二奇偶校验字一起发送所述第二符号帧。

9. 发明授权

US5189564A Magnetic recording/reproducing method and apparatus 失效
标题翻译：磁记录/再现方法和装置
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。

10. 发明授权

US4758903A Apparatus for recording and reproducing video signal and digital signal other than video signal 失效
标题翻译：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
IPC分类号： H04N5/782 , H04N9/793 , H04N9/802 , H04N9/82 , H04N9/835
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。

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