公开(公告)号：EP0200348A3

公开(公告)日：1988-05-04

申请号：EP86302179

申请日：1986-03-25

申请人： RCA CORPORATION

发明人： Willis, Donald Henry

IPC分类号： H04N05/12

CPC分类号： H04N5/126

摘要： In a synchronized digital horizontal deflection system operating at 2 x f H , a digital phase-lock-loop circuit (20) generates first f H rate signal (CMa) that is synchronized to the horizontal sync pulses (H s ), and a second f H rate second signal (CMb) that is delayed from the first signal (CMa) by one-half of the period H. A digital phase-control-loop circuit (120) receives the first and second signals and generates a horizontal deflection control signal (HORDRIVE) at 2 x f H rate that controls the retrace interval timing in a deflection circuit output stage (41). The synchronization of every other retrace interval occur in accordance with information provided by the first signal - (CMa).

公开(公告)号：EP0049965A3

公开(公告)日：1983-04-13

申请号：EP81304429

申请日：1981-09-25

申请人： RCA CORPORATION

发明人： Fernsler, Ronald Eugene ,  Willis, Donald Henry

IPC分类号： H04N05/12 ,  H04N03/22

CPC分类号： H04N5/126

摘要： A television horizontal automatic frequency and phase control (AFPC) system is provided including a first AFPC loop (40) responsive to horizontal sync signals (200) for producing a noise immune signal (214) in phase and frequency synchronism with the horizontal sync signals. A second AFPC loop (90) includes a phase detector (94) responsive to a second horizontal frequency signal and flyback pulses (220), and produces horizontal deflection drive signals (250) as a function of the phase relationship determined by the phase detector (94). A delay circuit (FF5) is responsive to the noise immune horizontal frequency signal (214) for producing the second horizontal frequency signal for the phase detector (94) with a phase delayed with respect to the noise immune signal. A lowpass filter (102) may be provided to delay the application of the flyback pulses to the phase detector (94), its delay being chosen in accordance with the delay of the delay circuit (FF5) so that a centered picture is produced on the television kinescope.

公开(公告)号：EP0169013A3

公开(公告)日：1987-11-04

申请号：EP85304825

申请日：1985-07-05

申请人： VICTOR COMPANY OF JAPAN, LIMITED

发明人： Nishimoto, Naomichi ,  Hirota, Akira ,  Kosaka, Yoshiteru

IPC分类号： H04N05/12

CPC分类号： H04N9/797

摘要： A video signal recording and reproducing apparatus comprises a circuit (12) for generating a first signal having a sampling frequency f s which is approximately a natural number multiple of a horizontal scanning frequency f H of an input composite video signal and satisfies F s ≒ f L + fu and having a phrase which differs by 180° for every one field, where f L represents a constant frequency in the range of 0.5 to 1 MHz and fu represents an upper limit frequency of a band required for a reproduced composite video signal a circuit (13) for sampling a signal part of the input composite video signal at least exluding synchronizing signal intervals thereof by the first signal, a circuit (14, 15) for recording and reproducing the sampled signal on and from a recording medium, a circuit (16) for obtaining from the reproduced signal first and second reproduced sampled signals having a mutual time difference of one field, a circuit (17) for generating from the reproduced signal a second signal having the frequency f s and having a phase which differs by 180° for every one field, and a circuit (18) supplied with the second signal for alternately and selectively passing the first and second reproduced sampled signals for every 1/2 period of the second signal so as to obtain a reproduced composite video signal which has been re-sampled.

公开(公告)号：EP0197699A3

公开(公告)日：1988-05-04

申请号：EP86302178

申请日：1986-03-25

申请人： RCA CORPORATION

发明人： Willis, Donald Henry

IPC分类号： H04N05/12

CPC分类号： H04N5/126

摘要： In a synchronized digital horizontal deflection system operating at 2xf H , a first word (HDPW) is produced that is indicative of the length of one-half the period H between f H rate horizontal sync pulses (Hs). A first f H rate signal (CMa) that is synchronized to the horizontal sync pulses (Hs) is generated. The first f H rate signal (CMa) is time shifted by one-half of the period H, in accordance with the first word (HDPW) to produce a second f H rate signal (CMb). The first (CMa) and second (CMb) signals are multiplexed (in 40) for generating a horizontal deflection control signal (CMa, CMb) at 2xf H rate that controls the retrace interval timing in a deflection circuit output stage (41).

公开(公告)号：EP0177100A3

公开(公告)日：1987-03-11

申请号：EP85201562

申请日：1985-09-27

申请人： Philips Patentverwaltung GmbH ,  N.V. Philips' Gloeilampenfabrieken

发明人： Oldach, Detlef

IPC分类号： H03L07/06 ,  H03D13/00 ,  H04N05/12

CPC分类号： H03D13/00 ,  H03L7/085