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US 5,758,010 AGranted
Reproducing apparatus with time base corrector
AssigneeCanon Kabushiki Kaisha
InventorHirotake Ando
Life of this patent
Estimating the term…
Abstract
A reproducing apparatus for reproducing a signal by moving a record bearing medium and a reproducing head relative to each other is provided with a time base corrector for correcting the time base of the signal reproduced. The time base corrector is characterized in that the operating state thereof is changed from one state over to another according to whether or not the controlled movement of the medium and the head relative to each other is in a steady state.
Claims23
A signal reproducing apparatus comprising:
- a) reproducing means for reproducing a signal containing a time base fluctuation from a record bearing medium;
- b) time base correction means for correcting a time base fluctuation of said signal reproduced by said reproducing means by using a clock signal;
- c) clock signal forming means for forming said clock signal, said clock signal forming means having a response speed dependent on construction of said clock signal forming means;
- d) transportation means for transporting said record bearing medium;
- and
- e) system control means for setting a transportation speed of said record bearing medium transported by said transportation means and for setting a response speed of said clock signal forming means with respect to the time base fluctuation so that said system control means increases transportation speed of the record bearing medium and increases the response speed of said clock signal forming means responsively to time base fluctuation.
3 more elements
A reproducing apparatus comprising:
- a) reproducing means for reproducing a signal from a record bearing medium;
- b) moving means for moving said record bearing medium;
- c) time base correction means for correcting a time base fluctuation of the signal reproduced by said reproducing means by using a clock signal, said time base correction means having a response speed being dependent on construction of said time base correction means;
- and
- d) control means for setting a response speed of said time base correction means with respect to the time base fluctuation in accordance with a transportation speed of said record bearing medium, said control means providing such a control that the response speed of said time base correction means is set up to a predetermined speed, according as the transportation speed of said record bearing medium is at a speed corresponding to a recording speed of the signal reproduced by said reproducing means, and the response speed of said time base correction means is increased from said predetermined speed, according as the transportation speed of said record bearing medium is at a speed different from the speed corresponding to said recording speed.
2 more elements
A signal reproducing apparatus, comprising:
- (a) reproducing means for reproducing a video signal from a record bearing medium;
- (b) clock signal generating means for forming a clock signal having a time base fluctuation according to that of the video signal reproduced by said reproducing means, said clock signal generating means including a synchronization signal extracting means for extracting a synchronization signal from the video signal reproduced by said reproducing means, and a PLL means for generating a signal which is phase-synchronized with the synchronization signal, wherein an output of said PLL means is outputted in the form of said clock signal, said clock signal generating means having a response speed being dependent on construction of said clock signal generating means;
- (c) time base correction means for correcting the time basis of the video signal reproduced by said reproducing means by using said clock signal, said time base correction means including variable delay means for receiving the video signal reproduced by said reproducing means, said variable delay means being controlled on the basis of said clock signal;
- (d) transportation means for transporting said record bearing medium;
- and
- (e) control means for setting a response speed of said clock signal generating means with respect to the time base fluctuation in accordance with a transportation speed of said record bearing medium, said control means providing such a control that the response speed of said clock signal generating means is set up to a predetermined speed, according as the transportation speed of said record bearing medium is at a speed corresponding to a recording speed of the signal reproduced by said reproducing means, and the response speed of said clock signal generating means is increased from said predetermined speed, according as the transportation speed of said record bearing medium is at a speed different from the speed corresponding to said recording speed.
3 more elements
A signal reproducing apparatus, comprising:
- a) reproducing means for reproducing a signal from a recording medium;
- b) clock signal generating means for generating a clock signal, said clock signal generating means having a response speed being dependent on construction of said clock signal generating means;
- c) processing means for receiving the signal reproduced by said reproducing means and the clock signal and for processing the received signal by using the clock signal;
- d) transporting means for transporting the recording medium;
- and
- e) control means for setting a transportation speed of said transportation means and a response speed of said clock signal generating means, jointly, with respect to a time base fluctuation of the signal reproduced by said reproducing means.
3 more elements
Dependencies are inferred from the claim text.