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1. 发明专利

JPS6347031B2 失效
公开(公告)号：JPS6347031B2
公开(公告)日：1988-09-20
申请号：JP14719880
申请日：1980-10-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： USUKI NAOJI , KITAMURA SADAFUMI
IPC分类号： H04N9/79 , H04N9/82 , H04N9/83

2. 发明专利

JPS6231402B2 失效
公开(公告)号：JPS6231402B2
公开(公告)日：1987-07-08
申请号：JP3844780
申请日：1980-03-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KITAMURA SADAFUMI , TANIGUCHI HIROSHI
IPC分类号： G11B5/02 , G11B5/82 , G11B5/85 , H04N5/91 , H04N5/92 , H04N9/83

3. 发明专利

JPS61192003A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS61192003A
公开(公告)日：1986-08-26
申请号：JP3330185
申请日：1985-02-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： BABA TASUKU , NAKATANI AKIHIRO , KITAMURA SADAFUMI
IPC分类号： G11B5/024
摘要： PURPOSE:To rewrite only a PCM audio area by using two rotary heads to record and reproduce both video signal and data signal areas separately from each other and also using a control circuit by turning off a fixed erasion head in a post-recording mode and actuates a flying erasion head. CONSTITUTION:The reproduction signal is extracted out of a magnetic tape 2 where the PCM audio and video signals are recorded, and only a PCM audio area undergoes the post-recording. In such a case, a control circuit 16 turns off a switch 15a which supplies the power to a drive circuit 14a of a fixed erasion head 6 as long as the priority is given to the post-recordiong mode. Then a switch 15b is turned on to apply the power to a drive circuit 14b of flying erasion heads 9a and 9b. Thus both heads 9a and 9b are actuated. At the same time, a switch 12 is changed to the reproduction side for video signal areas 8 and 8' in the post-recording mode. While the switch 12 is changed to the recording side in a PCM audio areas 7 and 7'. A recording amplifier 10 delivers the PCM audio signal in the post-recording mode.

4. 发明专利

JPS61144751A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS61144751A
公开(公告)日：1986-07-02
申请号：JP26573184
申请日：1984-12-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OKITA MANABU , IWAI TOSHIO , KITAMURA SADAFUMI
IPC分类号： G11B15/14
摘要： PURPOSE:To obtain a stable reproduced image having no noise by interposing an integration circuit between a switching circuit for a playback signal and a control circuit. CONSTITUTION:A signal reproduced by a video head 10 in playback mode is applied to a preamplifier 12a through a rotary transformer 9a and a switching circuit 11, and then switched successively and outputted by a preamplifier switching circuit 13. The integration circuit consisting of a C and an R is interposed between a control signal generating circuit 8a and the switching circuit 11a to remove a high frequency component generated by the switching circuit 11, thereby removing the influence of crosstalk upon other channels.

5. 发明专利

JPS61756B2 失效
公开(公告)号：JPS61756B2
公开(公告)日：1986-01-10
申请号：JP8184677
申请日：1977-07-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMITSU CHOJURO , KITAMURA SADAFUMI , MYAMOTO AKIRA
IPC分类号： G11B20/02 , H04N9/793 , H04N9/83 , H04N9/873

6. 发明专利

JPS59198557A Tracking method of magnetic recording and reproducing device 失效
标题翻译：磁记录和再现装置的跟踪方法
公开(公告)号：JPS59198557A
公开(公告)日：1984-11-10
申请号：JP7442383
申请日：1983-04-27
申请人： Matsushita Electric Ind Co Ltd
发明人： YAMADA KOUICHI , KUBO KANJI , KITAMURA SADAFUMI , USUKI NAOJI
IPC分类号： H04N5/7826 , G11B5/588 , G11B15/46 , G11B15/467
CPC分类号： G11B15/46
摘要： PURPOSE:To attain stable control by eliminating a flyback signal superimposed on a regenerated pilot signal in the method conducting tracking control using a pilot signal. CONSTITUTION:The regenerated pilot signal B superimposed with a flyback pulse signal is inputted from a terminal 15. The regenerated pilot signal C where a low frequency energy component of the flyback pulse signal is eliminated is obtained from the output by allowing the signal to pass through a high pass filter 16. A horizontal synchronizing signal B is inputted to a monostable multivibrator 18 triggered by the leading edge. This time constant is set to obtain either a pulse output D equal to the flyback signal in time width superimposed on the regenerated pilot signal, or broader more or less than the flyback signal. An output of the said high pass filter 16 is inputted to a gate circuit 19 and only the high period of the pulse output signal D of a monostable multivibrator 18 is gated, then the regenerated pilot signal E is obtained from the output of the gate circuit 19 and the signal is outputted from a terminal 20.
摘要翻译：目的：通过在使用导频信号进行跟踪控制的方法中消除叠加在再生导频信号上的反激信号来获得稳定的控制。构成：从终端15输入叠加有回扫脉冲信号的再生导频信号B.通过允许信号通过，从输出获得消除回扫脉冲信号的低频能量分量的再生导频信号C 高通滤波器16.水平同步信号B被输入到由前沿触发的单稳态多谐振荡器18。该时间常数被设置为获得等于叠加在再生导频信号上的时间宽度的等于反激信号的脉冲输出D，或者更大或更小于反激信号。所述高通滤波器16的输出被输入到门电路19，并且只有单稳态多谐振荡器18的脉冲输出信号D的高周期被选通，则再生导频信号E从门电路的输出获得并且从终端20输出信号。

7. 发明专利

JPS5923155B2 失效
公开(公告)号：JPS5923155B2
公开(公告)日：1984-05-31
申请号：JP12659176
申请日：1976-10-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMITSU CHOJURO , ARIMURA ICHIRO , KITAMURA SADAFUMI
IPC分类号： G11B20/02 , G11B5/027 , H04N9/44 , H04N9/45 , H04N9/84

8. 发明专利

JPS5823034B2 失效
公开(公告)号：JPS5823034B2
公开(公告)日：1983-05-12
申请号：JP11067975
申请日：1975-09-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KITAMURA SADAFUMI , ARIMURA ICHIRO , YAMAMITSU CHOJURO
IPC分类号： G11B20/02 , G11B5/027 , H04N9/84

9. 发明专利

JPS586436B2 失效
公开(公告)号：JPS586436B2
公开(公告)日：1983-02-04
申请号：JP8815375
申请日：1975-07-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YAMAMITSU CHOJURO , KITAMURA SADAFUMI , ARIMURA ICHIRO
IPC分类号： G11B20/02 , H04N9/898

10. 发明专利

JPS56145553A TRACKING ERROR DETECTION SYSTEM 失效
公开(公告)号：JPS56145553A
公开(公告)日：1981-11-12
申请号：JP4937580
申请日：1980-04-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KUBO KANJI , TANIGUCHI HIROSHI , YANO TAKEHIKO , FURUMOTO MITSUNOBU , KITAMURA SADAFUMI
IPC分类号： H04N5/7826 , G11B5/588 , G11B15/467 , G11B21/10
摘要： PURPOSE:To detect track slippage with a simple circuit constitution, by recording the pilot signal of a single frequency together with the video signal and by comparing levels of the pilot signal relatively at the reproducing time to obtain a tracking error signal. CONSTITUTION:The horizontal synchronizing signal included in the video signal is converted to a sine waveform through synchronizing separating circuit 32, band-pass filter 34, etc. to obtain pilot signal fB. Then, pilot signals which are different in phase by 180 deg. for every two tracks are recorded through switch circuit 36. The reproduced pilot signal is caused to pass through amplifying circuit 47, etc. to take out a voltage corresponding to the reproduced output level, and then, voltage (g) corresponding to the difference between voltage (e) corresponding to the level of the pilot signal and voltage (f) corresponding to the level of the pilot signal to be reproduced by head HB, namely, tracking slippage is output to terminal 52 through level comparator 51. By this constitution, track slippage is detected with the simple circuit constitution where the phase control circuit is not used.

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