公开(公告)号：US5068752A

公开(公告)日：1991-11-26

申请号：US248799

申请日：1988-09-26

申请人： Hiroshi Tanaka ,  Tetsuo Ishiwata ,  Shuzo Hitotsumachi ,  Hitoshi Komae ,  Susumu Yamaguchi ,  Tadashi Yoshino ,  Eiji Yamauchi

发明人： Hiroshi Tanaka ,  Tetsuo Ishiwata ,  Shuzo Hitotsumachi ,  Hitoshi Komae ,  Susumu Yamaguchi ,  Tadashi Yoshino ,  Eiji Yamauchi

IPC分类号： H04N5/928 ,  H04N9/802

CPC分类号： H04N5/928 ,  H04N9/802

摘要： A signal processing system for absorbing asynchronism between a video signal and an audio signal which is caused when a PCM audio signal is to be recorded together with the video signal on a helical scan-type tape recorder. When the video signal and the audio signal are recorded on the same track, a recording band width of the audio signal should be narrow. A sample pattern is provided which assures rapid pull-in for both data clock reproduction and carrier reproduction, when the audio signal is modulated by QPSK or when Q-QPSK modulation is used.

公开(公告)号：US5228041A

公开(公告)日：1993-07-13

申请号：US627928

申请日：1990-12-17

申请人： Tadashi Yoshino ,  Susumu Yamaguchi ,  Hitoshi Komae ,  Tetsuo Ishiwata ,  Eiji Yamauchi ,  Hiroshi Tanaka

发明人： Tadashi Yoshino ,  Susumu Yamaguchi ,  Hitoshi Komae ,  Tetsuo Ishiwata ,  Eiji Yamauchi ,  Hiroshi Tanaka

IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/30 ,  H04N5/935 ,  H04N9/802

CPC分类号： G11B20/1208 ,  G11B20/10527 ,  G11B20/1809 ,  G11B20/1833 ,  G11B27/30 ,  G11B27/3027 ,  H04N5/935 ,  H04N9/802 ,  G11B20/1211 ,  G11B2220/90 ,  G11B2220/913

摘要： There is provided a signal processing system for recording and reproducing a video signal and a digital audio signal with a rotary-head VTR and, more particularly, a memory control system which generates a block address and a memory write signal so that the sync signal for reproduced digital data is detected reliably and the digital data is stored in the memory circuit correctly.

摘要翻译： 提供了一种用于记录和再现具有旋转磁头VTR的视频信号和数字音频信号的信号处理系统，更具体地，是产生块地址和存储器写信号的存储器控​​制系统，使得用于 可靠地检测再现的数字数据，并将数字数据正确地存储在存储器电路中。

公开(公告)号：US5021897A

公开(公告)日：1991-06-04

申请号：US203107

申请日：1988-06-07

申请人： Tadashi Yoshino ,  Susumu Yamaguchi ,  Hitoshi Komae ,  Tetsuo Ishiwata ,  Eiji Yamauchi ,  Hiroshi Tanaka

发明人： Tadashi Yoshino ,  Susumu Yamaguchi ,  Hitoshi Komae ,  Tetsuo Ishiwata ,  Eiji Yamauchi ,  Hiroshi Tanaka

IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/30 ,  H04N5/935 ,  H04N9/802

CPC分类号： G11B27/3027 ,  G11B20/10527 ,  G11B20/1208 ,  G11B20/1809 ,  G11B20/1833 ,  H04N5/935 ,  H04N9/802 ,  G11B20/1211 ,  G11B2220/90 ,  G11B2220/913

摘要： There is provided a signal processing system for recording and reproducing a video signal and a digital audio signal with a rotary-head VTR and, more particularly, a memory control system which generates a block address and a memory write signal so that the sync signal for reproduced digital data is detected reliably and the digital data is stored in the memory circuit correctly.

公开(公告)号：US5142420A

公开(公告)日：1992-08-25

申请号：US512998

申请日：1990-04-23

申请人： Hiroshi Tanaka ,  Tetsuo Ishiwata ,  Eiji Yamauchi

发明人： Hiroshi Tanaka ,  Tetsuo Ishiwata ,  Eiji Yamauchi

IPC分类号： G11B20/10 ,  H03L7/081 ,  H04N9/802

CPC分类号： G11B20/10527 ,  H03L7/081 ,  H04N9/802

摘要： A phase locked loop is disclosed in which a digital audio signal is recorded in synchronism with a video signal and a sampling frequency of the digital audio signal is reproduced in reproduction mode. A frequency divider of the phase locked loop comprising a phase comparator a low-pass filter, a VCO and a frequency divider unit is switched by the number of the digital audio signal recorded for each vertical sync period (or 1/N thereof) of the video signal, so that a sampling frequency of the digital audio signal having no relationship of integral ratio with a vertical sync frequency Fv of the video signal is reproduced from the same frequency Fv. The reference input to the phase comparator is delayed by a predetermined time in accordance with the number of the digital audio signal, with the result that the sampling frequency reproduced has no period error to the extent that the reference input has no period error.

摘要翻译： 公开了一种锁相环，其中与视频信号同步地记录数字音频信号，并且在再现模式下再现数字音频信号的采样频率。 包括相位比较器的低通滤波器，VCO和分频器单元的锁相环的分频器通过为其垂直同步周期（或其1 / N）的每个垂直同步周期（或1 / N）记录的数字音频信号的数量进行切换 视频信号，使得与视频信号的垂直同步频率Fv无积分关系的数字音频信号的采样频率从相同的频率Fv再现。 根据数字音频信号的数量，相位比较器的参考输入被延迟预定的时间，结果是再现的采样频率没有周期误差，使得参考输入没有周期误差。

公开(公告)号：US5386323A

公开(公告)日：1995-01-31

申请号：US920730

申请日：1992-07-28

申请人： Tetsuo Ishiwata ,  Susumu Yamaguchi

发明人： Tetsuo Ishiwata ,  Susumu Yamaguchi

IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B27/032 ,  G11B27/036 ,  H04N5/92 ,  H04N5/926 ,  H04N5/928 ,  H04N9/802 ,  G11B5/02 ,  G11B5/09 ,  H04N5/78

CPC分类号： H04N9/802 ,  G11B27/036 ,  H04N5/9267 ,  G11B2220/90 ,  G11B27/032

摘要： Herein disclosed is a method and a system for recording and reproducing digital audio signals which enable simultaneous recording of video signals and audio signals without a synchronous relation, and simultaneous reproducing rerecorded audio signals if a part of channels of the audio signals are rerecorded, since a sample number of the audio signals for each the channel is equal to each other. On rerecording, a modulator 113 demodulates signals and the demodulated signals are separated into audio signals and sample number discriminating signals of the audio signals by a demultiplexor 114. A second counter changes dividing number on the basis of the sample number discriminating signals separated by the demultiplexor 114. A phase comparator 118 compares a phase of a cycle of the second counter 117 and a phase of a video frame cycle. Output signals are limited their band by a low-pass filter 119 and controls an oscillated frequency of a voltage controlled oscillator (VCO) 120. A second switch 106 selects output clock pulses of the VCO so that clock pulses used for A/D conversion are coincided with reproduced clock pulses. A fourth switch 110 selects output signals of a delaying means 115 so that sample number of recorded audio signals and sample number discriminating signals are coincided with reproduced audio signals.

摘要翻译： 这里公开了一种用于记录和再现数字音频信号的方法和系统，其能够同时记录视频信号和音频信号而没有同步关系，并且如果音频信号的一部分信道被重新记录，则同时再现重新记录的音频信号，因为 每个通道的音频信号的采样数量彼此相等。 在重新录制时，调制器113解调信号，并且解调信号由解复用器114分离成音频信号和音频信号的采样数鉴别信号。第二计数器根据由解复用器分离的采样数鉴别信号来改变分频数 相位比较器118比较第二计数器117的周期的相位和视频帧周期的相位。 输出信号通过低通滤波器119限制其频带，并控制压控振荡器（VCO）120的振荡频率。第二开关106选择VCO的输出时钟脉冲，使得用于A / D转换的时钟脉冲为 与再生的时钟脉冲一致。 第四开关110选择延迟装置115的输出信号，使得记录的音频信号和采样数鉴别信号的采样数与再现的音频信号一致。

公开(公告)号：US5047768A

公开(公告)日：1991-09-10

申请号：US514835

申请日：1990-04-26

申请人： Susumu Yamaguchi ,  Tetsuo Ishiwata

发明人： Susumu Yamaguchi ,  Tetsuo Ishiwata

IPC分类号： H03M7/50

CPC分类号： H03M7/50

摘要： A data companding method instantaneously compands the 14-bit digital audio signals to be outputted from a satellite broadcast receiver and so on is realized with the given conversion rule, which has a superior companding characteristics across the whole input range of the 14-bit data with SN being not deteriorated as compared with the 14-10 near-instantaneous companding law at the satellite broadcast transmission. A data compressor and a data expander in accordance with the present invention are realized by the construction of the combination of the coefficient table, a data shifter composed of a pluarlity of 4 to 1 data selectors, and an adder.

公开(公告)号：US4873590A

公开(公告)日：1989-10-10

申请号：US162102

申请日：1988-02-29

申请人： Tetsuo Ishiwata ,  Katsuyuki Taguchi

发明人： Tetsuo Ishiwata ,  Katsuyuki Taguchi

IPC分类号： G11B15/02 ,  G11B15/093 ,  G11B15/44 ,  G11B15/48

CPC分类号： G11B15/02 ,  G11B15/093 ,  G11B15/442

摘要： A magnetic recording and reproducing apparatus includes a control device for monitoring a take-up reel, a feed reel, and a capstan motor for rotational speed and direction. By monitoring the take-up reel, feed reel and capstan motor, the control device determines if the apparatus is operating properly. Based on the determinations regarding the proper operation of the apparatus, the control device controls the operation of the capstan motor and the shifting of the idler gear between a first operational state and a second idle state.