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1. 发明专利

JPS6352395A TAPE RECORDER WITH MULTIPLE PIN CONNECTOR 失效
公开(公告)号：JPS6352395A
公开(公告)日：1988-03-05
申请号：JP19451586
申请日：1986-08-20
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： G11B5/027 , G11B20/00 , G11B31/00 , H04N5/765 , H04N7/16
摘要： PURPOSE:To eliminate a manual switching when an AV control terminal and an AV control input terminal are used in common by setting the AV control terminal as an AV control signal input terminal at the time of an EE mode, and setting it to an AV control signal output terminal at the time of a video tape reproducing mode. CONSTITUTION:When scramble video signals are outputted from a tuner circuit 14, a decoder 70 outputs high level signals from an AV control output terminal (e). An AV control terminal (f) becomes high level and the terminal 30a of a selection control circuit 30 becomes high level, and the selection control circuit 30 connects an input selector circuit 22 to 22a side, and connects an output selector circuit 23 to 23b side. Scrambling video signals from the tuner circuit 14 are inputted to the decoder 70 and scrambled, and the video signals from the decoder 70 are inputted to an RF converter 18. In such a case, the decoder 70 outputs continuously the high level signals from the AV control output terminal (e). At the time of a VTR reproducing mode, the selection control circuit 30 sets the output selector circuit 23 to 23a side.

2. 发明专利

JPS6258462A NOISE ELIMINATING CIRCUIT 失效
公开(公告)号：JPS6258462A
公开(公告)日：1987-03-14
申请号：JP19899885
申请日：1985-09-09
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： G11B20/06 , H04N5/93 , H04N5/94
摘要： PURPOSE:To prevent the generation of noises due to lock release even if a long drop-out occurs, by providing a control means which selects the second means for a prescribed time after the end of the drop-out when the long drop- out occurs. CONSTITUTION:If the period of the occurrence of drop-out is long, the trailing edge of a control signal (c) is delayed by a prescribed time behind that of a drop-out detection pulse (b), and a control signal (d) is in the high level during this time. Thus, the first switch 9 is turned off during the period of drop-out. Since the first switch 9 is turned off in this case, the second loop is formed to lock a PLL circuit 18 before turning-on of the first switch 9 and the generation of noises is prevented if the period of drop-out is so long that the lock of the PLL circuit 18 is released. That is, the reference of the period of long drop-out is determined in a control circuit 15 by the metastable period of the first monostable multivibrator 50, and an output is obtained from the first AND gate 51 if drop-out longer than this reference period occurs.

3. 发明专利

JPS61146081A NOISE ELIMINATION CIRCUIT 失效
公开(公告)号：JPS61146081A
公开(公告)日：1986-07-03
申请号：JP26984884
申请日：1984-12-20
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： H04N5/93
摘要： PURPOSE:To carry out noise elimination under reduced waveform distortion by generating control pulse and holding output of the loop filter in case there is omission of carrier in a reproduction FM signal or generation of phase discontinuity by switching. CONSTITUTION:When there is no dropout in the reproduction FM signal or when it is not the time for head changeover, no control pulse is outputted from the dropout detection circuit 31 and a switch S is in ON state. Next, for phase discontinuity due to switching and dropout, a control pulse is prepared by a shaping circuit 32, and the switch S is in OFF state. As a result, in regard to the terminal voltage of the hold capacitor C the value immediately before the control pulse attains H level is held, therefore, the oscillation frequency of the VCO28 is held at the frequency of the reproduction FM signal immediately before the control pulse is outputted. Thus the FM demodulation output is hold at the value immediately before the noise and noise is eliminated.

4. 发明专利

JPH01114189A VIDEO SIGNAL RECORDER 失效
公开(公告)号：JPH01114189A
公开(公告)日：1989-05-02
申请号：JP27087987
申请日：1987-10-27
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI , MINAMI NORIAKI
IPC分类号： H04N9/83
摘要： PURPOSE:To separate a chroma signal without deteriorating the characteristic by converting a signal of a band including the chroma signal into a low frequency, supplying it to a comb-line filter utilizing a CCD so as to separate the chroma signal subject to low frequency conversion. CONSTITUTION:A video signal of a band centering the subcarrier of a chroma signal is extracted by an HPF 4 and fed to a frequency conversion circuit 5. Even after the signal is frequency-converted into a low frequency by the circuit 5, when the luminance signal component and the chroma signal are in a prescribed relation, the luminance signal component and chroma signal are separated by using the comb-line filter 7 utilizing the 1H CCD delay line 8. In the actual VTR, the PS(crosstalk prevention processing) is applied. Then the filter 7 is constituted as shown in figure and when the filter 7 introduces a signal not subject to PS processing by a changeover switch 15, the output of an adder 13 is selected and in the case of the signal subject to PS processing, the output of a subtracter 14 is selected. Thus, the low frequency conversion chroma signal is separated without deterioration in the characteristic.

5. 发明专利

JPS63238782A SKEW CORRECTING CIRCUIT 失效
公开(公告)号：JPS63238782A
公开(公告)日：1988-10-04
申请号：JP15060487
申请日：1987-06-17
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： H04N5/95
摘要： PURPOSE:To eliminate the generation of a skew distortion after switching by switching and deriving the reproducing output of a main head and the reproducing output of a sub-head after the alignment of a horizontal synchronous signal is executed. CONSTITUTION:A pair of main heads MH1 and MH2 having a different azimuth are arranged at a position facing to 180 deg. of a rotating cylinder, and further, at the position facing to 180 deg. respectively close to the main head MH1 and MH2, sub-heads SH1 and SH2, in which the azimuth relation is reverse to the main heads MH1 and MH2, are arranged. By first switches Sl1 and S2 to synchronize to a switching pulse RF, the reproducing output of the main heads MH1 and MH2 is switched, made into a continuous signal, and the reproducing output of the sub-heads SH1 and SH2 is switched and made into the continuous signal. In this case, a reproducing horizontal synchronizing signal inputted and separated to first and second synchronizing separating circuits 5 and 6 is aligned.

6. 发明专利

JPS6271058A RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS6271058A
公开(公告)日：1987-04-01
申请号：JP20981385
申请日：1985-09-20
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： G11B20/00
摘要： PURPOSE:To widen a dynamic range at the time of recording so as to make a faithful recording, by modulating plural divided-amplitude components of recording signals into different modulated frequencies and, at the same time, recording multiple signals formed by adding the modulated signals to each other on a recording medium. CONSTITUTION:Amplitude-extension-processed audio signals are outputted from a noise reduction circuit 3 to a limiter 4 and amplifier 6 and divided-amplitude components which are formed by dividing the amplitudes of audio signals outputted from the noise reduction circuit 3 into two are respectively inputted to modulators 5 and 7. Then the divided-amplitude components are FM- modulated into modulated frequencies f1 and f2 by the modulators 5 and 7 and the FM modulated signals are outputted from the modulators 5 and 7 to an adder 8. Multiple signals formed by adding the FM-modulated signals of the modulators 5 and 7 to each other are outputted from the adder 8 to a head 10 through an amplifier 9 and recorded on a tape 11 by means of the head 10.

7. 发明专利

JPS6452201A MAGNETIC RECORDER 失效
公开(公告)号：JPS6452201A
公开(公告)日：1989-02-28
申请号：JP2458788
申请日：1988-02-03
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI , INOUE TETSUYA
IPC分类号： G11B5/02
摘要： PURPOSE:To decrease the disturbance onto an FM audio signal by providing a control circuit increasing a frequency of a carrier signal of an FM video signal at audio exclusive mode so as to widen the frequency difference between the FM video signal and the FM audio signal at the audio exclusive mode. CONSTITUTION:A low frequency FM audio signal is recorded to an audio recording part 14a being a deep layer of a tape 10, a high frequency FM video signal is recorded to a video recording part 14b being the surface layer and the carrier frequency of the FM video signal even at the recording mode for the FM audio signal only. In closing a switch S2 at the audio exclusive mode, a resistor R3 is connected in parallel with a variable resistor VR1 and an FM modulation circuit 20c for the video signal brings the frequency of the output signal to, e.g., 3.4MHz or over. Thus, the frequency difference between the FM audio signal and the FM video signal is widened and the disturbance to the reproduced FM audio signal is decreased. The recording amplifier 24 is designed so as to reduce the output level when the frequency of the recording signal is increased.

8. 发明专利

JPH0550041B2 失效
公开(公告)号：JPH0550041B2
公开(公告)日：1993-07-28
申请号：JP3992184
申请日：1984-03-01
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： G11B20/02 , G11B5/027 , G11B20/08

9. 发明专利

JPH02302902A VIDEO TAPE RECORDER 失效
公开(公告)号：JPH02302902A
公开(公告)日：1990-12-14
申请号：JP12391289
申请日：1989-05-17
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： G11B5/027 , G11B5/02
摘要： PURPOSE:To prevent the quality deterioration of a sound signal by selecting a side to be distant from a sound FM carrier frequency when two kinds of video carrier frequencies exist, and supplying it to a rotary head simultaneously with a sound FM signal at the time of recording only the sound signal. CONSTITUTION:The recorder has an FM modulating circuit (S-VHS specification) 1 for high picture quality in which the carrier frequency at the time of non-modulation is 5.4MHz, and a standard FM modulating circuit 2 in which the carrier frequency at the time of non-modulation is 3.4MHz. When an S-VHS tape is loaded to the VTR, when the instruction of the S-VHS is executed and when the recording mode of only the FM sound signal is instructed, the modulating circuit 1 is selected by the action of a logic circuit 3. In such a case, when the recording of only the FM sound signal is executed, the non- modulation carrier signal 1 of the higher side is always supplied to a head 6 for video. Thus, the voice quality can be improved while maintaining a compatibility.

10. 发明专利

JPH0210994A CHROMINANCE SIGNAL PROCESSING CIRCUIT 失效
公开(公告)号：JPH0210994A
公开(公告)日：1990-01-16
申请号：JP16053988
申请日：1988-06-28
申请人： SANYO ELECTRIC CO
发明人： NAGANO YASUYUKI
IPC分类号： H04N9/84
摘要： PURPOSE:To eliminate crosstalk accurately by retarding a reproduced chrominance signal in a low frequency state and applying high frequency conversion and synthesis so as to match the phase of the undelayed chrominance signal and the phase of the delayed signal. CONSTITUTION:A reproduced low frequency chrominance signal is subjected to jitter correction by a conventional method and converted into the original band. That is, the phase of the oscillated output of a crystal oscillation circuit (VXO) 10 being a reference and that of a burst signal in the output of the 1st BPF 4 are compared to output the 1st carrier signal to be supplied to a 1st main frequency conversion circuit 3 and in the case of high frequency conversion by the signal, the jitter component is cancelled. On the other hand, the reproduced low frequency chrominance signal retarded by CCD delay element 2 is converted into a high frequency by the 2nd main frequency conversion circuit 5 by a 2nd carrier signal being an output of a 4th BRF 22. An undesired component is eliminated from the output of the circuits 3, 5 by the 1st and 2nd BRFs 4, 6 and result is synthesized by adder/subtractor 7, 8.

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