-
公开(公告)号：CA1089981A
公开(公告)日：1980-11-18
申请号：CA305853
申请日：1978-06-20
Applicant: SONY CORP
Inventor： TSUCHIYA TAKAO , MATSUZAKI ATSUSHI , OMORI SHOUJI , AKAZAWA SUSUMU , KUNIYOSHI YASUNOBU , TOMINAGA KIYONORI
Abstract: A clamping circuit for color television signals includes a demodulator for demodulating the chrominance component of the color television signals to produce first and second color difference signals, and first and second adders for adding adjustable first and second control signals to the first and second color difference signals so as to produce modified first and second color difference signals. A matrix circuit is responsive to the outputs from the first and second adders to produce a third color difference signal. A reference signal, which represents a predetermined level of a color television signal, such as the pedestal level, is added to eac of the color difference signals; and a first comparator compares the first color difference signal with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto, and a second comparator compares the second color difference signal, with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto. At the times of occurrence of the pedestal level of the color television signal, the outputs from the first and second comparators are sampled, respectively, to produce the first and second control signals which are fed back and added to the first and second color difference signals. In one embodiment, the reference signal is a d.c. level proportional to the pedestal level of the color television signal. In another embodiment, the reference signal is the luminance component of the color television signal clamped to the pedestal level. This clamped luminance signal is produced by another clamp circuit.
-
公开(公告)号：DE2844136A1
公开(公告)日：1979-04-26
申请号：DE2844136
申请日：1978-10-10
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU , TOMINAGA KIYONORI
-
公开(公告)号：CA1050157A
公开(公告)日：1979-03-06
申请号：CA246032
申请日：1976-02-18
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , NARAHARA HISAAKI , TSUCHIYA TAKAO
Abstract: In an apparatus for processing reproduced color video signals composed of a frequency-modulated luminance component and a frequency substantially below a standard frequency therefor; there are provided a drop-out compensating circuit responsive to a drop-out in the luminance component for inserting, in the interval of such drop-out, an earlier occurring portion of the luminance component, a frequencyconverter receiving the chrominance component and a frequencyreconverting signal for restoring the carrier frequency to the standard frequency therefor, an automatic frequency control circuit (AFC) responsive to horizontal synchronizing signals separated from the luminance component after the drop-out compensation thereof so as to regulate the frequencyreconverting signal in the sense for removing time base errors from the reproduced color video signals, and a circuit which is responsive to a drop-out in the luminance component for maintaining the frequency of the frequency-reconverting signal at a previously determined value during the drop-out so that the automatic frequency control operation will not be adversely affected by the drop-out compensation.
-
公开(公告)号：DE3105301C3
公开(公告)日：1999-08-05
申请号：DE3105301
申请日：1981-02-13
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TAKASHI
Abstract: A control apparatus for controlling a plurality of characteristics, such as hue, color, brightness, sound and the like, of a reproduced video picture includes a transmitter having a memory for storing data entries corresponding to the characteristics to be controlled, a central processing unit to change selected ones of the stored data entries and a plurality of switches for controlling the central processing unit to change selected ones of the stored data entries in response to actuation of selected ones of the switches, whereby the transmitter transmits the stored data entries, as changed; a receiver including a shift register in which the transmitted control data entries are serially received and converted into parallel control data entries, a D-A converter for producing a plurality of analog control voltages in response to the parallel control data entries from the shift register; and a plurality of voltage-controlled circuits for controlling the plurality of characteristics in response to the plurality of analog control voltages.
-
公开(公告)号：CA1128616A
公开(公告)日：1982-07-27
申请号：CA336258
申请日：1979-09-25
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU
Abstract: ? S79P123 FILTER CIRCUIT A filter circuit, preferably a low-pass filter, whose cut-off frequency is easily controlled and which can be manufactured as an integrated circuit. First and second transistors are connected in differential amplifier configuration, and a current source is connected to the common connection of the emitter electrodes thereof. The base electrode of the first transistor is connected to an input terminal. A reactance element is connected between the collector electrode of the second transistor and a source of reference potential, such as ground. A third transistor has its emitter electrode connected to the base electrode of the second transistor and its base electrode connected to the collector electrode of the second transistor. An output terminal is connected to the emitter electrode of the third transistor. -i-
-
Patent Agency Ranking
公开(公告)号：AU520981B2
公开(公告)日：1982-03-11
申请号：AU4052678
申请日：1978-10-09
Applicant: SONY CORP
Inventor： OKADA TAKASHI , KUNIYOSHI YASUNOBU , TOMINAGA KIYONORI
-
公开(公告)号：FR2476418A1
公开(公告)日：1981-08-21
申请号：FR8103016
申请日：1981-02-16
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TOKASHI
Abstract: A control apparatus for controlling a plurality of characteristics, such as hue, color, brightness, sound and the like, of a reproduced video picture includes a transmitter having a memory for storing data entries corresponding to the characteristics to be controlled, a central processing unit to change selected ones of the stored data entries and a plurality of switches for controlling the central processing unit to change selected ones of the stored data entries in response to actuation of selected ones of the switches, whereby the transmitter transmits the stored data entries, as changed; a receiver including a shift register in which the transmitted control data entries are serially received and converted into parallel control data entries, a D-A converter for producing a plurality of analog control voltages in response to the parallel control data entries from the shift register; and a plurality of voltage-controlled circuits for controlling the plurality of characteristics in response to the plurality of analog control voltages.
-
公开(公告)号：DE2828654A1
公开(公告)日：1979-01-18
申请号：DE2828654
申请日：1978-06-29
Applicant: SONY CORP
Inventor： TSUCHIYA TAKAO , OMORI SHOUJI , KUNIYOSHI YASUNOBU , MATSUZAKI ATSUSHI , AKAZAWA SUSUMA , TOMIRAGA KIYONORI
Abstract: A clamping circuit for color television signals includes a demodulator for demodulating the chrominance component of the color television signals to produce first and second color difference signals, and first and second adders for adding adjustable first and second control signals to the first and second color difference signals so as to produce modified first and second color difference signals. A matrix circuit is responsive to the outputs from the first and second adders to produce a third color difference signal. A reference signal, which represents a predetermined level of a color television signal, such as the pedestal level, is added to each of the color difference signals; and a first comparator compares the first color difference signal, with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto, and a second comparator compares the second color difference signal, with the reference signal added thereto, to the third color difference signal, with the reference signal added thereto. At the times of occurrence of the pedestal level of the color television signal, the outputs from the first and second comparators are sampled, respectively, to produce the first and second control signals which are fed back and added to the first and second color difference signals. In one embodiment, the reference signal is a d.c. level proportional to the pedestal level of the color television signal. In another embodiment, the reference signal is the luminance component of the color television signal clamped to the pedestal level. This clamped luminance signal is produced by another clamp circuit.
-
公开(公告)号：DE2755748A1
公开(公告)日：1978-07-06
申请号：DE2755748
申请日：1977-12-14
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TAKASHI , SUMI TAKO
Abstract: Apparatus for eliminating time base errors from a carrier-modulated information signal, such as a color video signal which is reproduced from a record medium. A circuit including a variable oscillator generates a carrier signal of controllable frequency and phase. An automatic frequency control circuit detects the time base frequency error in the carrier-modulated information signal and produces a frequency error signal proportional to the detected frequency error. An automatic phase control circuit detects a time base phase error in the carrier-modulated information signal and produces a phase error signal proportional to the detected phase error. A switching circuit selectively supplies either the frequency error signal or the phase error signal as a control signal to the variable oscillator so as to correspondingly control the frequency and phase of the generated carrier signal in a manner to eliminate such frequency and phase errors, the frequency and phase error signals being supplied to the variable oscillator during selected, mutually exclusive intervals. A frequency converter is provided with the controlled carrier signal and with the information signal so as to convert the carrier of the information signal with the generated, controlled carrier such that the frequency-converted information signal has a carrier of substantially constant frequency and phase.
-
公开(公告)号：DE3105301C2
公开(公告)日：1994-07-07
申请号：DE3105301
申请日：1981-02-13
Applicant: SONY CORP
Inventor： KUNIYOSHI YASUNOBU , OKADA TAKASHI
Abstract: A control apparatus for controlling a plurality of characteristics, such as hue, color, brightness, sound and the like, of a reproduced video picture includes a transmitter having a memory for storing data entries corresponding to the characteristics to be controlled, a central processing unit to change selected ones of the stored data entries and a plurality of switches for controlling the central processing unit to change selected ones of the stored data entries in response to actuation of selected ones of the switches, whereby the transmitter transmits the stored data entries, as changed; a receiver including a shift register in which the transmitted control data entries are serially received and converted into parallel control data entries, a D-A converter for producing a plurality of analog control voltages in response to the parallel control data entries from the shift register; and a plurality of voltage-controlled circuits for controlling the plurality of characteristics in response to the plurality of analog control voltages.
-
-
-
-
-
-
-
-
-
Search Results
70
records
(took 0.025 seconds)
