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公开(公告)号：CA2035241C
公开(公告)日：2001-04-03
申请号：CA2035241
申请日：1991-01-30
Applicant: SONY CORP
Inventor： HONDA TAKASHI , HIRAI JUN
Abstract: A recording mode discriminating circuit corresponding to reproduced signals of first and second recording modes in which a carrier frequency of frequency-modulated luminance signal becomes high and low includes a first bandpass filter using an upperside band wave frequency of the first recording mode as a central frequency thereof, a second bandpass filter using a predetermined carrier frequency of the second recording mode as a central frequency thereof, a discharge control circuit for flowing or interrupting a current of a first predetermined value in response to the presence or absence of the first bandpass filter when the reproduced signals are supplied, a charge and discharge control circuit for flowing or interrupting a current of a second predetermined value smaller than the first predetermined value in response to the presence or absence of the output of the second bandpass filter, and a capacitor commonly connected to the discharging circuit and the charging and discharging circuit, wherein the recording modes of the reproduced signals are discriminated on the basis of a voltage across the capacitor. Also, there is a magnetic recording and reproducing apparatus, to which the above-mentioned recording mode discriminating circuit can be suitably applied.
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公开(公告)号：DE3785071T2
公开(公告)日：1993-07-08
申请号：DE3785071
申请日：1987-04-16
Applicant: SONY CORP
Inventor： FUKUDA TOKUYA , MASUDA ISAO MASUDA ISAO , HONDA TAKASHI
IPC: H04N9/78
Abstract: A color video signal processing circuit comprising an input terminal (l0) through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion (20) which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion (30) for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder (40) for adding an output of the level modifying portion (30) to the second signal, a first output portion (60, 70) connected to the signal separating portion (20), and a second output portion (50) connected to the adder (40). The chrominance signal separated from the color video signal is obtained through the first output portion (60, 70) and the luminance signal separated from the color video signal and modified to have a predetermined level-frequency characteristic is obtained through the second output portion (50).
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公开(公告)号：AU7114187A
公开(公告)日：1987-10-22
申请号：AU7114187
申请日：1987-04-07
Applicant: SONY CORP
Inventor： FUKUDA TOKUYA , MASUDA ISAO , HONDA TAKASHI
Abstract: A color video signal processing circuit comprising an input terminal (l0) through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion (20) which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion (30) for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder (40) for adding an output of the level modifying portion (30) to the second signal, a first output portion (60, 70) connected to the signal separating portion (20), and a second output portion (50) connected to the adder (40). The chrominance signal separated from the color video signal is obtained through the first output portion (60, 70) and the luminance signal separated from the color video signal and modified to have a predetermined level-frequency characteristic is obtained through the second output portion (50).
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公开(公告)号：DE69228437D1
公开(公告)日：1999-03-25
申请号：DE69228437
申请日：1992-12-04
Applicant: SONY CORP
Inventor： HONDA TAKASHI , SATO DAI
Abstract: In an apparatus for processing an input video signal that includes a chrominance signal and a luminance signal, where the luminance signal is frequency-modulated and the chrominance signal is subsampled, preferably by field-offset subsampling, the subsampled chrominance signal is frequency-converted (75) to a lower frequency band than the frequency band of the frequency-modulated luminance signal. The frequency-modulated luminance signal and the frequency-converted subsampled chrominance signal are then combined (10) and the resulting combined signal is recorded on a recording medium such as a magnetic tape T. During reproduction of the recorded signal, interpolation (78) among frames is used to reconstruct the chrominance signal. Recording of the frequency-converted subsampled chrominance signal allows for space-efficient recording of the video signal while providing a reproduced chrominance signal that has a relatively wide bandwidth, thereby permitting improved colour reproducibility.
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Patent Agency Ranking
公开(公告)号：AU597046B2
公开(公告)日：1990-05-24
申请号：AU7114187
申请日：1987-04-07
Applicant: SONY CORP
Inventor： FUKUDA TOKUYA , MASUDA ISAO , HONDA TAKASHI
Abstract: A color video signal processing circuit comprising an input terminal (l0) through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion (20) which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion (30) for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder (40) for adding an output of the level modifying portion (30) to the second signal, a first output portion (60, 70) connected to the signal separating portion (20), and a second output portion (50) connected to the adder (40). The chrominance signal separated from the color video signal is obtained through the first output portion (60, 70) and the luminance signal separated from the color video signal and modified to have a predetermined level-frequency characteristic is obtained through the second output portion (50).
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公开(公告)号：DE69228437T2
公开(公告)日：1999-09-02
申请号：DE69228437
申请日：1992-12-04
Applicant: SONY CORP
Inventor： HONDA TAKASHI , SATO DAI
Abstract: In an apparatus for processing an input video signal that includes a chrominance signal and a luminance signal, where the luminance signal is frequency-modulated and the chrominance signal is subsampled, preferably by field-offset subsampling, the subsampled chrominance signal is frequency-converted (75) to a lower frequency band than the frequency band of the frequency-modulated luminance signal. The frequency-modulated luminance signal and the frequency-converted subsampled chrominance signal are then combined (10) and the resulting combined signal is recorded on a recording medium such as a magnetic tape T. During reproduction of the recorded signal, interpolation (78) among frames is used to reconstruct the chrominance signal. Recording of the frequency-converted subsampled chrominance signal allows for space-efficient recording of the video signal while providing a reproduced chrominance signal that has a relatively wide bandwidth, thereby permitting improved colour reproducibility.
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公开(公告)号：DE3785071D1
公开(公告)日：1993-05-06
申请号：DE3785071
申请日：1987-04-16
Applicant: SONY CORP
Inventor： FUKUDA TOKUYA , MASUDA ISAO MASUDA ISAO , HONDA TAKASHI
IPC: H04N9/78
Abstract: A color video signal processing circuit comprising an input terminal (l0) through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion (20) which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion (30) for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder (40) for adding an output of the level modifying portion (30) to the second signal, a first output portion (60, 70) connected to the signal separating portion (20), and a second output portion (50) connected to the adder (40). The chrominance signal separated from the color video signal is obtained through the first output portion (60, 70) and the luminance signal separated from the color video signal and modified to have a predetermined level-frequency characteristic is obtained through the second output portion (50).
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公开(公告)号：CA2035241A1
公开(公告)日：1991-08-01
申请号：CA2035241
申请日：1991-01-30
Applicant: SONY CORP
Inventor： HONDA TAKASHI , HIRAI JUN
Abstract: A recording mode discriminating circuit corresponding to reproduced signals of first and second recording modes in which a carrier frequency of frequency-modulated luminance signal becomes high and low includes a first bandpass filter using an upperside band wave frequency of the first recording mode as a central frequency thereof, a second bandpass filter using a predetermined carrier frequency of the second recording mode as a central frequency thereof, a discharge control circuit for flowing or interrupting a current of a first predetermined value in response to the presence or absence of the first bandpass filter when the reproduced signals are supplied, a charge and discharge control circuit for flowing or interrupting a current of a second predetermined value smaller than the first predetermined value in response to the presence or absence of the output of the second bandpass filter, and a capacitor commonly connected to the discharging circuit and the charging and discharging circuit, wherein the recording modes of the reproduced signals are discriminated on the basis of a voltage across the capacitor. Also, there is a magnetic recording and reproducing apparatus, to which the above-mentioned recording mode discriminating circuit can be suitably applied.
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10.发明专利
公开(公告)号：CA2084797A1
公开(公告)日：1993-06-17
申请号：CA2084797
申请日：1992-12-08
Applicant: SONY CORP
Inventor： HONDA TAKASHI , SATO DAI
Abstract: PATENT 390100-2672 In an apparatus for processing an input video signal that includes a chrominance signal and a luminance signal, the luminance signal is frequency-modulated and the chrominance signal is subsampled, preferably by field-offset subsampling, whereupon, the subsampled chrominance signal is frequencyconverted to a lower frequency band than the frequency band of the frequency-modulated luminance signal. The frequencymodulated luminance signal and the frequency-converted subsampled chrominance signal are then combined and the resulting combined signal is recorded on a recording medium such as a magnetic tape. During reproduction of the recorded signal, interpolation among frames is used to reconstruct the chrominance signal. Recording of the frequency-converted subsampled chrominance signal allows for space-efficient recording of the video signal while providing a reproduced chrominance signal that has a relatively wide bandwidth, thereby permitting improved color reproducibility. NL9:2672.APP
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