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公开(公告)号：JPH0345595B2
公开(公告)日：1991-07-11
申请号：JP1724382
申请日：1982-02-05
Applicant: SONY CORP
Inventor： KAMAI TOSHIMITSU , MINEGISHI AKIRA
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公开(公告)号：JPS58114678A
公开(公告)日：1983-07-08
申请号：JP21316181
申请日：1981-12-28
Applicant: SONY CORP
Inventor： KAMAI TOSHIMITSU , MARUICHI TAKANORI
Abstract: PURPOSE:To prevent the quality deterioration of the recorded sound signal and to deliver the video and sound signals, by drawing a reproduced sound signal out of a demodulating part when the output of the 1st reproducing head part is higher than a prescribed level and drawing a sound signal out of the 2nd head part when the output of the 1st reproducing head is less than the prescribed level. CONSTITUTION:The rotary reproducing magnetic heads 31 and 32 scan alternately the inclined tracks which are adjacent to a video sound signal reproducer. The fixed reproducing magnetic heads 61 and 62 scan consecutively the sound tracks formed on a magnetic tape. The outputs of the heads 31 and 32 are applied to one side of each of switching circuits 59 and 60 via FM demodulators 44-47 and a switching circuit 56, etc. While the outputs of the heads 61 and 62 are applied to the other side of the circuits 59 and 60 respectively via level controllers 69 and 70, etc. Then the outputs of the heads 31 and 32 are detected by level detecting circuits 71 and 72. When these outputs are higher than a prescribed level, the outputs of the heads 31 and 32 are drawn out through the circuits 59 and 60. While the outputs of the heads 61 and 62 are drawn out when the above-mentioned outputs are less than a prescribed level. Thus the quality of the sound signal is improved.
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公开(公告)号：JPS5960709A
公开(公告)日：1984-04-06
申请号：JP17024982
申请日：1982-09-29
Applicant: Sony Corp
Inventor： KAMAI TOSHIMITSU
CPC classification number: G11B20/00992
Abstract: PURPOSE:To ensure the discrimination among stereophonic, double sound and monaural modes in a reproduction time, by inserting a pilot signal of an optional frequency at the outside of an audible band selectively in response to at least stereophonic, double sound and monaural modes of an audio signal. CONSTITUTION:A signal P sent from a pilot signal oscillator 32 of 25kHz is supplied to a switch circuit 33 and switched among contacts of modes of stereophony S, double sound B and monaural M to be supplied in common to adder circuits 13L and 13R through diodes 34L and 34R, respectively. At the same time, the signal supplied from the contact B is fed to the circuit 13L. The pilot signal P is selectively superposed on the spectrum of an audio signal which undergoes FM modulation in the stereophonic, double sound and monaural modes at the outside of audible bands (0-20kHz), i.e., 25kHz and in response to the stereophonic and double sound modes. When control signals SB of double sounds are detected in a reproduction time, just one of these two signals is extracted at the output side. Furthermore, a signal obtained by adding both signals is extracted at the output side when a signal SM is detected.
Abstract translation: 目的：为了确保在再现时间中立体声，双声道和单声道模式之间的区别，通过响应于至少立体声，双声道和单声道模式选择性地插入可听频带外部的可选频率的导频信号 音频信号。 构成：从25kHz的导频信号振荡器32发送的信号P被提供给开关电路33，并且在立体声S，双声道B和单声道M的模式的触点之间切换，以通过二极管加到电路13L和13R中 34L和34R。 同时，从触点B提供的信号被馈送到电路13L。 导频信号P选择性地叠加在音频信号的频谱上，该音频信号在可听频带（0-20kHz）外的立体声，双声和单声道模式中进行FM调制，即25kHz，并且响应于立体声和双声道 声音模式。 当在再现时间中检测到双重声音的控制信号SB时，在输出侧仅提取这两个信号之一。 此外，当检测到信号SM时，在输出侧提取通过相加两个信号而获得的信号。
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公开(公告)号：JPS5712438A
公开(公告)日：1982-01-22
申请号：JP8485180
申请日：1980-06-23
Applicant: SONY CORP
Inventor： KAIMAI HIROYUKI , SONODA MASAKAZU , KOMATSU MASAAKI , SAKAI ATSUO , KAMAI TOSHIMITSU
Abstract: PURPOSE:To prevent a fluctuation of the tape transport extent caused by a change of speed of slow motion reproduction, by controlling the level or width of the intermittent transport driving pulse in accordance with the intermittent period of a tape. CONSTITUTION:The slow motion reproducing speed with which the intermittent normal transport due to a capstan equivalent to a pitch of the control signal corresponding to a frame of pause of a magnetic tape within a prescribed frame period number is repeated varies in accordance with the number of selection frame periods in a stop mode. In case the speed of reproduction is varied, a slow-speed monostable multivibrator 6 is controlled via a transistor 20, a capacitor 18 and others with control of a variable resistance 21 of a correcting circuit 17. Then the width and others are controlled for the driving pulse delivered from a forward-turn monostable multivibrator 7, and thus a correction is given to the fluctuation of the starting state due to the residuel energy according to the slow reproduction speed of the intermittent drive of a capstan produced by a step motor 1 or the like. In the same way, a fluctuation can be prevented for the tape intermittent transport extent caused by a change of speed of slow motion reproduction also at the brake side.
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公开(公告)号：JPS572177A
公开(公告)日：1982-01-07
申请号：JP7529980
申请日：1980-06-04
Applicant: SONY CORP
Inventor： KAIMAI HIROYUKI , SONODA MASAKAZU , KOMATSU MASAAKI , SAKAI ATSUO , KAMAI TOSHIMITSU
Abstract: PURPOSE:To simplify greatly the control of a compensation circuit, by performing a still reproduction with use of a pair of rotary heads which is provided at a position away from an angulr distance of 180 deg. by a specific angular distance. CONSTITUTION:An azimuth slant recording is carried out to reproduce a recording medium containing a recording pattern in which a shift of 0.75H (H: distance equivalent to a horizontal period on track) is caused. In this case, rotary heads 1A and 2A distributed with a shift of angle of 0.25H' (H': angle equivalent to a horizontal period) to an angular distance of 180 deg. are used. Thus a jumping compensation is possible in a still reproduction mode of a record pattern to which no H arrangement is given and by producing alternately a state with an intervention of a delay circuit of 0.5Th (Th: a horizontal period) and a state with no intervention at a compensation circuit. In the case of a record pattern having no H arrangement, a state with an intervention of a delay circuit of 0.25Th and a state with no intervention are produced alternately. In such way, the control of a compensation circuit is greatly simplified.
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Patent Agency Ranking
公开(公告)号：JPS5963013A
公开(公告)日：1984-04-10
申请号：JP17366482
申请日：1982-10-01
Applicant: Sony Corp
Inventor： KAMAI TOSHIMITSU
CPC classification number: G11B20/06
Abstract: PURPOSE:To prevent a variation of a DC component and the generation of noise by a simple constitution by replacing a period before and after switching of an output of the first demodulator with an output of the second demodulator. CONSTITUTION:In case when an original signal is as shown in the figure A, signals having an overlap are outputted from heads 19e, 19o as shown in the figures B, C. These signals are switched and FM-demodulated by switching circuits 71L, 71R as showh in the figure D and a signal as shown in the figure E is fetched. The signal contains a noise (b). On the other hand, outputs of limiting circuits 422, 424 are FM-demodulated and a signal as shown in the figure F is fetched. Subsequently, these signals are switched by switching circuits 74L, 74R as shown in the figure G and a signal containing no noise is outputted as shown in the figure H. In this way, a sound signal is demodulated. Also, in this case, a noise component contained in a demodulating signal is replaced with other demodulating signal and is eliminated.
Abstract translation: 目的：通过用第二解调器的输出替换第一解调器的输出之前和之后的周期，通过简单的结构来防止DC分量的变化和噪声的产生。 构成：在原始信号如图A所示的情况下，如图B，C所示，从头部19e，19o输出具有重叠的信号。这些信号由切换电路71L，71R进行切换和FM解调 如图D中的显示，并且获取如图E所示的信号。 信号包含噪声（b）。 另一方面，限制电路422,424的输出被FM解调，并且获取如图F所示的信号。 随后，如图G所示，这些信号由切换电路74L，74R切换，并且如图H所示输出不含噪声的信号。以这种方式，声音信号被解调。 此外，在这种情况下，解调信号中包含的噪声分量被替换为其他解调信号，并被消除。
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公开(公告)号：JPS5956205A
公开(公告)日：1984-03-31
申请号：JP16711582
申请日：1982-09-24
Applicant: Sony Corp
Inventor： KAMAI TOSHIMITSU
CPC classification number: G11B20/00992
Abstract: PURPOSE:To distinguish the stereo mode, the double sound mode, and the monaural mode from one another at the reproducing time, by inserting a pilot signal at the outside of the audible band selectively in accordance with respective modes of sound signals in the recording system where the sound signal is superposed to the video signal. CONSTITUTION:Pilot signals of, for example, 25kHz and 30kHz at the outside of the audible band which are superposed selectively to the sound signal of FM modulation pass through band-pass filters 33S and 33B, which have the same center frequency, and are detected as control signals SS and SB. When the stereo signal SS is detected by a switch matrix circuit 50, signals from deemphasis circuts 49L and 49R are taken out as they are. When the double sound signal SB is detected, only one of them is taken out; and when signals SS and SB are not detected, two signals are added, and the result is taken out to the output side. In this simple constitution, respective sound modes are distinguished from one another at the reproducing time.
Abstract translation: 目的：通过根据记录系统中的声音信号的各种模式选择性地在可听频带的外部插入导频信号，以便在再现时将立体声模式，双声音模式和单声道模式彼此区分开 其中声音信号叠加到视频信号上。 构成：选择性地与FM调制声音信号叠加在可听频带外部的例如25kHz和30kHz的导频信号通过具有相同中心频率的带通滤波器33S和33B，并被检测 作为控制信号SS和SB。 当立体声信号SS被开关矩阵电路50检测时，来自去加重电路49L和49R的信号原样取出。 当检测到双声道信号SB时，只有其中一个被取出; 并且当未检测到信号SS和SB时，添加两个信号，并将结果取出到输出侧。 在这种简单的结构中，各个声音模式在再现时彼此区分开。
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公开(公告)号：JPS58143686A
公开(公告)日：1983-08-26
申请号：JP2573082
申请日：1982-02-19
Applicant: SONY CORP
Inventor： KAMAI TOSHIMITSU
Abstract: PURPOSE:To select and offer an optimum reproducing method, by detecting whether sounds are recorded in the tape running direction onto a magnetic tape or not and whether frequency-modulated sounds are recorded together with a video signal on a video track or not. CONSTITUTION:A tape detecting circuit 20 discriminates the normal system, where sounds are recorded in the tape running direction, or the system where sounds have the frequency modulated and are recorded on the video track provided obliquely to the tape running direction. In case of the normal system, the signal from a video head is reproduced as it is. In case of the latter system, the signal from the video head is reproduced through a filter 71 where FM modulation components are removed from the video signal. The FM modulation signal is selected by filters 51-54 and is supplied to a demodulating circuit.
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公开(公告)号：JPS58114583A
公开(公告)日：1983-07-07
申请号：JP21248981
申请日：1981-12-26
Applicant: SONY CORP
Inventor： KAMAI TOSHIMITSU , KOUNO TAKASHI
Abstract: PURPOSE:To reproduce an audio signal having high quality, no impulsive noise and excellent fidelity by demodulating FM-modulated reproduction outputs obtained from two reproducing rotary magnetic heads alternately into reproduced audio signals to concatenat the signals. CONSTITUTION:Reproducing magnetic heads 31 and 32 scan on slanting adjacent tracks t1 and t2 of a magnetic tape T alternately accompanied with overlap time. The head 31 generates the reproduction output of the 1st mixture output M1, and the head 32 generates the reproduction output of the 2nd mixture output M2. Those outputs are supplied to a video signal processing part 35 through amplifiers 33 and 34. At the same time, those outputs are supplied to FM demodulators 44-47 through band-pass filters 36-39 and amplitude limiting circuits 40-43, so that a reproduced left signal SL and a right signal SR are obtained alternately accompanied with a overlapping. The signals are passed through low-pass filters 48-51 to concatenate within the overlap time by switching circuits 53 and 54. Consequently, no impulsive noise is generated.
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公开(公告)号：JPS58103278A
公开(公告)日：1983-06-20
申请号：JP20191781
申请日：1981-12-15
Applicant: SONY CORP
Inventor： MINEGISHI AKIRA , KOUNO TAKASHI , KAMAI TOSHIMITSU
Abstract: PURPOSE:To record the video signal with high density at and the same time to decrease the beat interference due to the reproduced video signal, by making an FM-modulated sound signal the signal made by means of modulating the frequency of a carrier wave with the sound signal to be recorded and the signal having a frequency outside an audible frequency band. CONSTITUTION:The FM modulators 6 and 7 give FM modulation to the carrier waves having a frequency f1 and f2 (f1
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