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51. 发明专利

JPH033996B2 失效
公开(公告)号：JPH033996B2
公开(公告)日：1991-01-21
申请号：JP9986781
申请日：1981-06-26
申请人： SONY CORP
发明人： ASAIDA TAKASHI
IPC分类号： H04N9/04 , H04N9/09 , H04N9/64 , H04N9/65 , H04N9/67 , H04N11/04 , H04N11/10
摘要： A digital colour camera includes circuits (2R, 2B, 2G) for generating first, second and third digital colour signals, each with a sample rate of 4f sc (where f sc represents a colour sub-carrier frequency) from outputs of first, second and third imagers, a circuit (5) for forming a digital luminance signal from the first, second and third digital colour signals, a circuit (12, 13) for forming a dot-sequential colour difference signal in which first and second digital colour difference signals appear alternately at every ¼fsc from the first, second and third digital co- iour signals, and a circuit for passing the dot-sequential colour difference signal through a digital filter (14) so as to limit the band widths of the first and second digital colour difference signals.

52. 发明专利

JPH033994B2 失效
公开(公告)号：JPH033994B2
公开(公告)日：1991-01-21
申请号：JP7002581
申请日：1981-05-09
申请人： HITACHI ELECTRONICS
发明人： KOBAYASHI SUSUMU
IPC分类号： H04N9/65 , H04N9/455 , H04N9/465 , H04N11/16

53. 发明专利

JPH0247916B2 失效
公开(公告)号：JPH0247916B2
公开(公告)日：1990-10-23
申请号：JP9002782
申请日：1982-05-28
申请人： FUIRITSUPUSU FURUUIRANPENFUABURIKEN NV
发明人： NIKORAASU YAN REENDERUTO UAN DERU BARUKU
IPC分类号： H04N9/65 , H04N9/455 , H04N11/14

54. 发明专利

JPH02113791A CHROMINANCE SIGNAL MODULATING CIRCUIT 失效
公开(公告)号：JPH02113791A
公开(公告)日：1990-04-25
申请号：JP26785888
申请日：1988-10-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NISHIMURA SHINJI , KURODA HIDEO , TSUCHIYA TOSHIO
IPC分类号： H04N9/68 , H04N9/65
摘要： PURPOSE:To dispense with an individual level converting circuit and to reduce a circuit scale by causing a carrier generating circuit to have the function of the level converting circuit. CONSTITUTION:The title circuit is composed of multiplying circuits 3 and 4, a carrier generating circuit 5 and an adding circuit 6. Here, the carrier generat ing circuit 5 is composed of a ROM to output the data of a sine value and a cosine value in a trigonometrical function corresponding to the phase of an input address. Only by causing the ROM data to be level-conversion- coefficient-fold to a color difference signal, without increasing the circuit scale, the carrier generating circuit 5 can be made to have the level converting func tion. Thus, the individual level converting circuit can be dispensed with, and the circuit scale can be made small.

55. 发明专利

JPH02111169A SIGNAL PROCESSING CIRCUIT FOR VIDEO CAMERA 失效
公开(公告)号：JPH02111169A
公开(公告)日：1990-04-24
申请号：JP26457888
申请日：1988-10-20
申请人： SANYO ELECTRIC CO
发明人： KAZUI KAZUHIRO , ITO HIROYA
IPC分类号： H04N5/18 , H04N9/65 , H04N9/67 , H04N9/68
摘要： PURPOSE:To allow the circuit to cope with both the case of a color component signal obtained from a process IC and a color difference signal obtained therefrom by changing the setting of a gain of a gain control amplifier without changing the constitution of an encoder IC even when the color component signal is obtained from the process IC and the color difference signal is obtained. CONSTITUTION:A signal obtained from a process IC 201 is a color component signal, a picture signal X obtained from a CCD 1 is separated and color component signals R, G and B are obtained through gamma correction or the like and inputted to an encoder IC 202. The color component signals R, B are inputted to the 1st and 2nd clamp circuits 21, 22 and the color component signal G is inputted to the 3rd clamp circuit 23. When a signal obtained from the process IC 101 is a color difference signal, color difference signals R-Y and B-Y are inputted respectively to the 1st and 2nd clamp circuits 21, 22 and the input of the 3rd clamp circuit 23 is connected to ground.

56. 发明专利

JPH0145795B2 失效
公开(公告)号：JPH0145795B2
公开(公告)日：1989-10-04
申请号：JP17304382
申请日：1982-09-30
申请人： SHARP KK
发明人： SUZUKI TAKAO , ISHIDA HARUO , ABUMI TAKAO , NAKAI KAZUHIRO
IPC分类号： H04N9/65 , H04N9/00 , H04N9/67 , H04N9/74

57. 发明专利

JPS62276986A VIDEO ENCODER CIRCUIT 失效
公开(公告)号：JPS62276986A
公开(公告)日：1987-12-01
申请号：JP6415286
申请日：1986-03-24
申请人： TOSHIBA CORP
发明人： TOKUMITSU SHIGENORI
IPC分类号： H04N9/65
摘要： PURPOSE:To eliminate the need for adjustment and to prevent deterioration in characteristic by forming an analog waveform video signal form a color signal of digital waveform by digital arithmetic in converting a digital color signal into a video signal. CONSTITUTION:A digital D-LPF 16 applies an arithmetic operation of the same characteristic as that of a LPF with respect to a luminance signal component generated from a luminance signal component generating section 13 to suppress the disturbance of a chrominance carrier signal. Further, a digital D=BPF 17 applies an arithmetic operation of the same characteristic as that of a BPF to the color difference signal component to suppress the disturbance to a luminance signal component. The luminance signal component subjected to low-pass arithmetic and the chrominance carrier signal subjected to band pass arithmetic include the digital videos signal component added by an adder 18. The video signal component is latched once by latch to match timing and a D/A converter 20 converts it into an analog video signal.

58. 发明专利

JPS62245793A MODULATION AND DEMODULATION SYSTEM FOR CHROMINANCE SIGNAL 失效
公开(公告)号：JPS62245793A
公开(公告)日：1987-10-27
申请号：JP8846986
申请日：1986-04-17
申请人： SONY CORP
发明人： OGAWA SHOEI
IPC分类号： H04N9/66 , G11B20/06 , H04N9/65 , H04N9/86
摘要： PURPOSE:To prevent the beat disturbance between the fundamental wave and the 3rd harmonic by applying FM modulation to a signal once at a high frequency at modulation and applying frequency conversion to a signal into a carrier frequency at the transmission. CONSTITUTION:The signal subjected to FM modulation at a high carrier frequency is fed to a frequency conversion circuit 16, where the signal is multiplied with a 3.58MHz sinusoidal wave, and for example, as to a color difference signal R-Y, the signal whose carrier frequency is 4.78+3.58=8.36MHz and 4.78-3.58=1.2MHz is obtained. Thus, the carrier frequency 1.2MHz is extracted from a low pass filter 17 and the sum frequency 8.36MHz component is eliminated. Since the 3rd harmonic component in both the sum and difference frequency components being the multiplication with the 3. 58MHz signal is 11MHz orover, the component is eliminated by the low pass filter 17. Thus, the FM wave from the low pass filter 17 is a sinusoidal wave only and the effect of the 3rd harmonic is not caused at the demodulation.

59. 实用新型

JPS6241508Y2 失效
公开(公告)号：JPS6241508Y2
公开(公告)日：1987-10-23
申请号：JP13130880
申请日：1980-09-16
IPC分类号： H04N9/45 , H04N9/64 , H04N9/65 , H04N9/72

60. 发明专利

JPS62209990A SERVO CONTROL OSCILLATION CIRCUIT 失效
公开(公告)号：JPS62209990A
公开(公告)日：1987-09-16
申请号：JP5135486
申请日：1986-03-11
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： TSUKAMOTO TOSHIHIKO , KUDO HIROSHI
IPC分类号： H04N9/64 , H04N9/65
摘要： PURPOSE:To stabilize the operation of a VCO by applying on/off control periodically to the oscillation of a voltage controlled variable frequency oscillation circuit (VCO). CONSTITUTION:The VCO 3 uses a control pulse SCB from an input terminal 14B to apply on/off control of its oscillation in a servo control oscillation circuit 12B. The control pulse SCB consists of a pulse PB at a high level for a prescribed period including a sampling pulse SP in the vertical blanking period VBLK and a pulse PB' at a high level during each other line including a video line LB of a B-Y signal. The VCO 3 is oscillated during a high level period of the control pulse SCB and the oscillation is stopped at a low level period. The phases of reference pulses Sb at the leading point of time of the pulse PB of the control pulse SCB are set so that they are always equal at all the vertical blanking periods VBLK, the VCO 3 stops the oscillation at a low level period of the control pulse SCB at the low level period of the control pulse SCB and starts the oscillation at the leading from the low to the high level, and the phase of an output signal VR-Y is always kept constant at the oscillation start point of time.

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