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121. 发明授权

US4766505A Method and apparatus for recording video and audio signals in successive tracks on a record medium 失效
标题翻译：用于在记录介质上的连续轨道中记录视频和音频信号的方法和装置
公开(公告)号：US4766505A
公开(公告)日：1988-08-23
申请号：US111107
申请日：1987-10-20
申请人： Kenji Nakano , Hisayoshi Moriwaki
发明人： Kenji Nakano , Hisayoshi Moriwaki
IPC分类号： H04N5/91 , G11B20/00 , H04N5/928 , H04N5/78 , H04N5/76
CPC分类号： H04N5/928
摘要： A method and apparatus for recording and reproducing an information signal comprised of a video signal and an audio signal in a plurality of successive parallel tracks on a magnetic tape, each track including a first audio section followed by a video section, by converting the audio signal into a PCM digital audio signal; compressing the PCM audio signal; frequency modulating the compressed PCM audio signal to produce an output PCM audio signal; and recording the output PCM audio signal and the video signal in the plurality of successive tracks such that one field interval of the video signal is recorded in the video section of each track and the output PCM audio signal corresponding to one field interval of the video signal is recorded in the audio section of each track and corresponds to the video signal in the leading portion of the previous successive track and the video signal in the trailing portion of the previous alternate track, wherein the audio signal recorded in each track is delayed by a maximum of 1.5 field intervals from the video signal to which it corresponds.
摘要翻译：一种用于在磁带上的多个连续并行轨道中记录和再现包括视频信号和音频信号的信息信号的方法和装置，每个轨道包括跟随视频部分的第一音频部分，通过转换音频信号成PCM数字音频信号; 压缩PCM音频信号; 对压缩的PCM音频信号进行频率调制以产生输出PCM音频信号; 并将输出PCM音频信号和视频信号记录在多个连续轨道中，使得视频信号的一个场间隔被记录在每个磁道的视频部分中，并且输出PCM音频信号对应于视频信号的一个场间隔被记录在每个磁道的音频部分中，并且对应于先前连续磁道的前导部分中的视频信号和前一备用磁道尾部中的视频信号，其中记录在每个磁道中的音频信号被延迟一个与其对应的视频信号最多1.5场。

122. 发明授权

US4758911A Audio signal recording and/or reproducing apparatus 失效
标题翻译：音频信号记录和/或再现装置
公开(公告)号：US4758911A
公开(公告)日：1988-07-19
申请号：US828172
申请日：1986-02-11
申请人： Kenji Nakano , Takao Takahashi
发明人： Kenji Nakano , Takao Takahashi
IPC分类号： G11B5/008 , G11B5/53 , H04N5/7826 , G11B15/12 , G11B5/02
CPC分类号： H04N5/78263 , G11B5/00873 , G11B5/00878 , G11B5/534
摘要： A system and apparatus for helically scanning a magnetic tape having slant tracks wherein the slant tracks are divided into a plurality of segments. A helical scan drum has at least first and second rotary head pairs. The first head pair scans at least one of the segments of a first track while the second head pair simultaneously scans at least one of the segments of the second slant track of the magnetic tape. This system is particularly useful for utilizing a tape for portable audio use wherein the same tape is also useful for video applications.
摘要翻译：一种用于螺旋扫描具有倾斜轨道的磁带的系统和装置，其中倾斜轨道被分成多个段。螺旋扫描鼓具有至少第一和第二旋转磁头对。第一头对扫描第一轨道的至少一个段，而第二头对同时扫描磁带的第二倾斜轨道的至少一个段。该系统对于利用便携式音频使用的磁带特别有用，其中相同的磁带也可用于视频应用。

123. 发明授权

US4641309A Method and apparatus for selectively compensating burst errors of variable length in successive digital data words 失效
标题翻译：用于在连续的数字数据字中选择性地补偿可变长度的突发错误的方法和装置
公开(公告)号：US4641309A
公开(公告)日：1987-02-03
申请号：US750243
申请日：1985-07-01
申请人： Kenji Nakano , Hisayoshi Moriwaki
发明人： Kenji Nakano , Hisayoshi Moriwaki
IPC分类号： G11B20/18 , H04B14/04 , H04L1/00 , G06F11/10
CPC分类号： H04L1/0057 , G11B20/1806 , G11B20/1876 , H04L1/0045
摘要： A method and apparatus for selectively compensating burst errors of variable length in successive data words. Correct and erroneous data words are identified, and the presence of one of the following error conditions is sensed: (a) an erroneous data word preceded and followed, respectively, by correct data words; (b) plural successive erroneous data words preceded and followed, respectively, by correct data words; and (c) a predetermined number of successive erroneous data words preceded by a correct data word. These error conditions are compensated respectively as follows: (a) the erroneous data word is replaced with a compensated data word derived from one interpolation of a correct preceding and following data word; (b) the plural erroneous data words are replaced with respective compensated data words derived from plural interpolations of the correct preceding and following data words; and (c) at least the first of the predetermined number of successive erroneous data words is replaced with the preceding correct data word.
摘要翻译：一种用于在连续数据字中选择性地补偿可变长度的突发错误的方法和装置。识别正确和错误的数据字，并且感测到存在以下错误条件之一：（a）分别以正确数据字前后的错误数据字; （b）分别由正确数据字前后的多个连续的错误数据字; 和（c）在正确的数据字之前的预定数量的连续的错误数据字。这些误差条件分别被补偿如下：（a）错误的数据字被从正确的前后数据字的一个内插导出的补偿数据字代替; （b）将多个错误数据字替换为从正确的前一个和后续数据字的多个内插导出的相应的补偿数据字; 和（c）至少预定数量的连续错误数据字中的第一个被替换为前面的正确数据字。

124. 发明授权

US4575772A Apparatus for recording additional video signals in a helical scan operation 失效
标题翻译：用于在螺旋扫描操作中记录附加视频信号的装置
公开(公告)号：US4575772A
公开(公告)日：1986-03-11
申请号：US478491
申请日：1983-03-24
申请人： Keiichiro Shimada , Takao Takahashi , Hisayoshi Moriwaki , Kenji Nakano
发明人： Keiichiro Shimada , Takao Takahashi , Hisayoshi Moriwaki , Kenji Nakano
IPC分类号： H04N5/91 , G11B20/00 , G11B20/12 , G11B27/032 , G11B27/036 , G11B27/30 , G11B27/34 , H04N5/262 , H04N5/926 , H04N5/928 , H04N7/00 , G11B5/09
CPC分类号： H04N5/9268 , G11B27/036 , G11B27/3027 , H04N5/928 , G11B2220/90 , G11B27/032
摘要： A video signal recording apparatus of the type that records a coded audio signal through time division relative to a video signal at one extended end of each of oblique tracks formed on a magnetic tape by helical scanning. The apparatus comprises a circuit for recording a coded video signal in the track region where a coded audio signal is recorded, and a circuit for recording identification data to discriminate between the coded audio signal and the coded video signal on the magnetic tape or recording control data thereon to control playback modes of the recorded signals.
摘要翻译：一种视频信号记录装置，其类型是通过螺旋扫描在磁带上形成的每个倾斜轨道的一个延伸端，通过时分相对于视频信号记录编码音频信号。该装置包括用于在记录有编码音频信号的轨道区域中记录编码视频信号的电路，以及用于记录识别数据以鉴别编码音频信号和磁带上的编码视频信号或记录控制数据的电路以控制记录信号的重放模式。

125. 发明授权

US4549229A Method and apparatus for compensating for tape jitter during recording and reproducing of a video signal and PCM audio signal 失效
标题翻译：在视频信号和PCM音频信号的记录和再现期间补偿磁带抖动的方法和装置
公开(公告)号：US4549229A
公开(公告)日：1985-10-22
申请号：US462517
申请日：1983-01-31
申请人： Kenji Nakano , Hisayoshi Moriwaki , Takao Takahashi
发明人： Kenji Nakano , Hisayoshi Moriwaki , Takao Takahashi
IPC分类号： H04N5/928 , H04N5/95 , G11B5/09
CPC分类号： H04N5/95 , H04N5/928
摘要： Apparatus for recording and reproducing an information signal comprised of a video signal and an audio signal in a plurality of successive tracks on a magnetic tape, includes a recording section comprised of a PCM processor which converts the audio signal to a PCM audio signal and compresses the same, a dummy signal generator for compensating for tape jitter by generating a dummy signal and supplying the same to the PCM processor where the dummy signal is added both before and after each portion of the compressed PCM audio signal to be recorded in an overscan section of each track, and a magnetic head assembly which records the video signal in a main section of each track and each portion of the compressed PCM audio signal and dummy signal added thereto in the overscan section of each track; and a reproducing section comprised of a magnetic head assembly which scans the tracks to reproduce the information signal recorded therein, a switch assembly which separates the video signal reproduced from the main section of each track and the PCM audio signal reproduced from the overscan section of each track; a PCM processor which converts the PCM audio signal to the original analog audio signal and a timing signal generator for compensating for tape jitter by enabling the PCM processor only during a period slightly greater than the period of the PCM audio signal recorded in the overscan section of each track.
摘要翻译：用于在磁带上的多个连续轨道中记录和再现由视频信号和音频信号组成的信息信号的装置包括：PCM处理器的记录部分，该PCM处理器将音频信号转换成PCM音频信号并压缩相同的虚拟信号发生器，用于通过产生虚拟信号来补偿磁带抖动，并将其提供给PCM处理器，在PCM处理器中，将待记录的压缩PCM音频信号的每个部分之前和之后添加虚拟信号，每个轨道和磁头组件，其将每个轨道的主要部分中的视频信号和压缩的PCM音频信号的每个部分以及添加到其中的虚拟信号记录在每个磁道的过扫描部分中; 以及由磁头组件组成的再现部分，该磁头组件扫描轨道以再现记录在其中的信息信号;开关组件，其将从每个磁道的主要部分再现的视频信号和从每个磁道的过扫描部分再现的PCM音频信号分离; 跟踪; PCM处理器，其将PCM音频信号转换为原始模拟音频信号;以及定时信号发生器，用于通过仅在稍微大于记录在过扫描部分中的PCM音频信号的周期的周期内使能PCM处理器来补偿磁带抖动每个轨道。

126. 发明授权

US4506202A Digital servo circuit 失效
标题翻译：数字伺服电路
公开(公告)号：US4506202A
公开(公告)日：1985-03-19
申请号：US508191
申请日：1983-06-27
申请人： Shigeru Tajima , Hiroshi Okada , Kenji Nakano
发明人： Shigeru Tajima , Hiroshi Okada , Kenji Nakano
IPC分类号： H02P23/00 , G05B19/08
CPC分类号： H02P23/22 , H02P23/186 , Y10S388/911 , Y10S388/912
摘要： A digital servo circuit which comprises a first N-bit counter for counting clock pulses at a recurrence frequency corresponding to error data and a second N-bit counter for counting divided recurrence frequency clock pulses at 1/M times the aforementioned recurrence frequency. The digital servo circuit controls the pull-in operation of a servo system with the count output of the second N-bit counter as control data, while it controls the operation of the servo system in the normal phase-locked state thereof with the count outputs of the first and second N-bit counters as control data with the count output of the second N-bit counter changed according to the amount of external disturbance caused to the servo system.
摘要翻译：一种数字伺服电路，包括：第一N位计数器，用于以对应于误差数据的再现频率计数时钟脉冲;以及第二N位计数器，用于计数上述复现频率的1 / M倍的分频再现频率时钟脉冲。数字伺服电路利用第二N位计数器的计数输出作为控制数据来控制伺服系统的引入操作，同时利用计数输出控制伺服系统处于正常锁相状态的操作第一和第二N位计数器作为控制数据，其中第二N位计数器的计数输出根据对伺服系统的外部干扰量而改变。

127. 发明授权

US4210943A Automatic tracking servo control system 失效
标题翻译：自动跟踪伺服控制系统
公开(公告)号：US4210943A
公开(公告)日：1980-07-01
申请号：US940269
申请日：1978-09-07
申请人： Tadahiko Nakamura , Kenji Nakano
发明人： Tadahiko Nakamura , Kenji Nakano
IPC分类号： H04N5/7826 , G05D13/62 , G11B15/467 , G11B21/10 , G11B15/46
CPC分类号： G11B15/4675
摘要： An automatic tracking servo control system which is adapted to control the tracking of at least one rotary signal reproducing head which scans successive parallel record tracks on a movable record medium. Position pulses are generated when the at least one head rotates into predetermined position with respect to the record medium, and these position pulses are used in conjunction with control signals which are reproduced from the record medium and which had been recorded at spaced locations therealong in predetermined relation to the record tracks for controlling the position of the at least one head with respect to the tracks scanned thereby. A detector detects the relative strength of the signal reproduced by the at least one head during periodic intervals. A phase shift circuit shifts the phase of each reproduced control signal as a function of the difference between the relative signal strengths in successive periodic intervals. The phase-shifted control signal is used in a servo circuit, together with the position pulses, to control the tracking of the rotary head.
摘要翻译：一种自动跟踪伺服控制系统，其适于控制对可移动记录介质上的连续并行记录轨迹进行扫描的至少一个旋转信号再现头的跟踪。当至少一个头部相对于记录介质旋转到预定位置时，产生位置脉冲，并且这些位置脉冲与从记录介质再现的控制信号结合使用，并且已经被记录在预定的位置上与用于控制至少一个头相对于由此扫描的轨迹的位置的记录轨道相关。检测器在周期性间隔期间检测由至少一个头部再现的信号的相对强度。相移电路根据连续的周期性间隔中的相对信号强度之差，移位每个再现的控制信号的相位。相位控制信号与位置脉冲一起用于伺服电路，以控制旋转磁头的跟踪。

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