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公开(公告)号：KR840001465B1
公开(公告)日：1984-09-27
申请号：KR810000098
申请日：1981-01-15
Applicant: SONY CORP
Inventor： MATSUZAKI ATSUSHI , KAWAMATA MITSUO
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公开(公告)号：AU5709690A
公开(公告)日：1990-12-20
申请号：AU5709690
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：GB2235084A
公开(公告)日：1991-02-20
申请号：GB9013188
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus detects in which of a plurality of recording modes, in which frequencies of carriers of FM video signals are different, a reproduced FM video signal was recorded. It does this by counting (23) the number of pulses resulting from wave-shaping (21) the carrier of a reproduced FM video signal that occur during a predetermined period. By using a digital detecting mode apparatus, recording modes having different carriers can be positively detected by small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：DE4018956A1
公开(公告)日：1990-12-20
申请号：DE4018956
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：DE3044546A1
公开(公告)日：1981-06-04
申请号：DE3044546
申请日：1980-11-26
Applicant: SONY CORP
Inventor： MATSUZAKI ATHUSHI , KAWAMATA MITSUO
Abstract: A video signal processing circuit for an input video signal having a DC level, a pedestal level, and a blanking period, includes a first clamp circuit for clamping the pedestal level of the input video signal to a first predetermined DC level in response to a clamp voltage supplied from a clamp voltage source, a blanking circuit for setting the level of the input video signal to a second predetermined DC level which is higher than the pedestal level of the input video signal during the blanking period of the input video signal and for producing a wave-formed signal, a peak-hold circuit for detecting and holding the darkest level of the wave-formed signal and for producing a peak-held signal, a series circuit of a diode and resistor, which produces a threshold level signal, connected between the first clamp circuit and the output of the peak-held circuit, a comparator circuit supplied at one input with the lower of the threshold level signal and the peak-held signal and supplied at another input with the output from the first clamp circuit for comparing the signals supplied thereto and for producing an output signal corresponding to the higher one of the compared signals, and an average picture level detecting circuit including a variable impedance element connected to the resistor for increasing the threshold level signal in response to increases in the average picture level of the input video signal.
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Patent Agency Ranking
公开(公告)号：DE4018956C2
公开(公告)日：2002-08-01
申请号：DE4018956
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：GB2235084B
公开(公告)日：1993-09-22
申请号：GB9013188
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：AU622562B2
公开(公告)日：1992-04-09
申请号：AU5709690
申请日：1990-06-13
Applicant: SONY CORP
Inventor： KAWAMATA MITSUO
Abstract: A video signal recording mode detecting apparatus is provided to detect a plurality of recording modes in which frequencies of the carriers in FM video signals are different. By counting the number of pulses that result from wave-shaping the carrier of an FM video signal during a predetermined period, it is possible to detect the particular video signal recording mode being employed. By using a digital detecting mode circuit recording modes having different carriers can be positively detected by relative small-scale circuits suitable for fabrication as integrated circuits.
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公开(公告)号：CA1154152A
公开(公告)日：1983-09-20
申请号：CA365344
申请日：1980-11-24
Applicant: SONY CORP
Inventor： MATSUZAKI ATSUSHI , KAWAMATA MITSUO
Abstract: A video signal processing circuit for an input video signal having a DC level, a pedestal level, and a blanking period, includes a first clamp circuit for clamping the pedestal level of the input video signal to a first predetermined DC level in response to a clamp voltage supplied from a clamp voltage source, a blanking circuit for setting the lvel of the input video signal to a second predetermined DC level which is higher than the pedestal level of the input video signal during the blanking period of the input video signal and for producing a wave-formed signal, a peak-hold circuit for detecting and holding the darkest level of the wave-formed signal and for producing a peak-held signal, a series circuit of a diode and resistor, which produces a theshold level signal, connected between the first clamp circuit and the output of the peakheld circuit, a comparator circuit supplied at one input with the lower of the threshold level signal and the peak-held signal and supplied at another input with the output from the first clamp circuit for comparing the signals supplied thereto and for producing an output signal corresponding to the higher one of the compared signals, and an average picture level detecting circuit including a variable impedance element connected to the resistor for increasing the threshold level signal in response to increases in the average picture level of the input video signal.
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公开(公告)号：FR2470502A1
公开(公告)日：1981-05-29
申请号：FR8025009
申请日：1980-11-25
Applicant: SONY CORP
Inventor： MATSUZAKI ATSUSHI , KAWAMATA MITSUO
Abstract: A video signal processing circuit for an input video signal having a DC level, a pedestal level, and a blanking period, includes a first clamp circuit for clamping the pedestal level of the input video signal to a first predetermined DC level in response to a clamp voltage supplied from a clamp voltage source, a blanking circuit for setting the level of the input video signal to a second predetermined DC level which is higher than the pedestal level of the input video signal during the blanking period of the input video signal and for producing a wave-formed signal, a peak-hold circuit for detecting and holding the darkest level of the wave-formed signal and for producing a peak-held signal, a series circuit of a diode and resistor, which produces a threshold level signal, connected between the first clamp circuit and the output of the peak-held circuit, a comparator circuit supplied at one input with the lower of the threshold level signal and the peak-held signal and supplied at another input with the output from the first clamp circuit for comparing the signals supplied thereto and for producing an output signal corresponding to the higher one of the compared signals, and an average picture level detecting circuit including a variable impedance element connected to the resistor for increasing the threshold level signal in response to increases in the average picture level of the input video signal.
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