-
公开(公告)号：US4670796A
公开(公告)日：1987-06-02
申请号：US625235
申请日：1984-06-27
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。
-
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。
-
3.发明授权Method and apparatus for PCM recording and reproducing an audio signal having an asynchronous relation between the sampling frequency for the audio signal and the rotation frequency of a rotary head scanner 失效用于PCM记录和再现具有用于音频信号的采样频率与旋转磁头扫描器的旋转频率之间的异步关系的音频信号的方法和装置
公开(公告)号：US4937686A
公开(公告)日：1990-06-26
申请号：US929909
申请日：1986-11-13
CPC分类号： H04N5/928 , G11B20/10527 , G11B20/1809 , G11B2020/1087
摘要： A PCM audio signal recording and reproducing apparatus samples an audio signal with a sampling frequency having an asynchronous relation to a field frequency of a video signal; converts it to a PCM signal, adds error detection/correction data to a predetermined number of PCM data, forms a data frame by those signals, modulates it in accordance with a predetermined modulation system, and records the audio signal together with the video signal or just the audio signal on a record medium by using a rotary head type scanner which is controlled so as to have a synchronous relation to the field frequency of the video signal. A digital signal processing circuit having a memory of a predetermined capacity is provided, and the number of digital data to be recorded in one data frame is varied in accordance with a difference between the number of input data of the digital audio signal to the digital signal processing circuit and the number of output data supplied to the record medium for recording. In the recording mode, the PCM audio signal is sectioned into blocks, a data block address signal is added to each block to indicate a relative order of a block to the other blocks and is completely added in one track, certain number of blocks are combined to form a block set for processing signals, and an identification signal completing in the block and an interleave block address signal for indicating a relative order to other blocks are added to each block.
摘要翻译： PCM音频信号记录和再现装置以与视频信号的场频率具有异步关系的采样频率对音频信号进行采样; 将其转换为PCM信号，将错误检测/校正数据添加到预定数量的PCM数据，通过这些信号形成数据帧，根据预定的调制系统对其进行调制，并将音频信号与视频信号一起记录或 通过使用被控制为与视频信号的场频率具有同步关系的旋转头型扫描仪，仅在记录介质上的音频信号。 提供具有预定容量的存储器的数字信号处理电路，并且要记录在一个数据帧中的数字数据的数量根据数字音频信号的输入数据数与数字信号之间的差异而变化 处理电路和提供给用于记录的记录介质的输出数据的数量。 在记录模式下，将PCM音频信号分割为块，将数据块地址信号添加到每个块，以指示块与其他块的相对顺序，并将其完全添加到一个轨道中，将一定数量的块组合 形成用于处理信号的块集合，并且在块中完成的识别信号和用于指示其他块的相对顺序的交织块地址信号被添加到每个块。
-
4.发明授权
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
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。
-
5.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。
-
6.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：US4685004A
公开(公告)日：1987-08-04
申请号：US712094
申请日：1985-03-15
CPC分类号： G11B20/1809 , G11B20/10527
摘要： In a recording operation by a rotary head type PCM recording/reproducing apparatus including at least two magnetic heads, the odd-numbered sample data and the even-numbered sample data are discriminatively extracted and stored. The stored data corresponding to an amount of data outputted from the A/D converter within a predetermined time is selectively read out and supplied to the two heads to thereby record the data in such a manner that the odd-numbered data and the even-numbered data are recorded separately on a track basis or alternatively recorded separately on a preceding half and a succeeding half of each track. The error detecting and correcting code is prepared on the basis of the data to be recorded in each track. In reproduction of the recorded data, upon detection of a drop-out of the data from one of the two heads, the drop-out data is corrected through interpolation procedure to thereby reconstitute the original analog signal.
摘要翻译： 在通过包括至少两个磁头的旋转磁头型PCM记录/再现装置的记录操作中，奇数样本数据和偶数样本数据被辨别地提取和存储。 对应于在预定时间内从A / D转换器输出的数据量的存储数据被选择性地读出并提供给两个磁头，从而以奇数数据和偶数编号的方式记录数据 数据在轨道基础上单独记录，或者分别记录在每个轨道的前半部分和后半部分。 基于要记录在每个轨道中的数据来准备错误检测和校正码。 在记录数据的再现中，在检测到来自两个头之一的数据丢失时，通过插值程序来校正丢失数据，从而重构原始模拟信号。
-
公开(公告)号：US4682332A
公开(公告)日：1987-07-21
申请号：US694658
申请日：1985-01-24
CPC分类号： G11B20/1809
摘要： Error detection/correction codes appended to a recording signal for a PCM recorder are so arranged as to ensure detection and/or correction of a dropout or error of a data block address in the reproduction of the recording signal. In recording digital signals on a recording medium, the digital signals are formatted in n-word blocks, each block further including a sync signal for providing a reference timing for the reproduction of the signal, control data related to the digital signals, a data block address for identifying the block of n-words, an error detection code for detecting an error in the control data and the block address, and an error detection/correction code for error detection and/or correction for the block address and the n-words. A recording system includes an error detection/correction code generating circuit which generates error detection/correction codes using a Reed Solomon code or b-adjacent code. The generated error detection/correction codes are combined by a multiplexer so that a recording signal is arranged, and recorded on the recording medium.
摘要翻译： 附加到用于PCM记录器的记录信号的错误检测/校正码被布置成确保在记录信号的再现中检测和/或校正数据块地址的丢失或错误。 在记录介质上记录数字信号时，数字信号被格式化成n字块，每个块还包括一个同步信号，用于提供用于信号再现的参考定时，与数字信号相关的控制数据，数据块 用于识别n字块的地址，用于检测控制数据和块地址中的错误的错误检测码，以及用于块地址和n字的错误检测和/或校正的错误检测/校正码 。 记录系统包括使用里德所罗门码或b相邻码产生错误检测/校正码的错误检测/校正码产生电路。 所生成的误差检测/校正码由多路复用器组合，使得记录信号被布置并记录在记录介质上。
-
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。
-
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
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。
-
-
-
-
-
-
-
-
-
搜索结果
63 条记录 (耗时 0.023 秒)