Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-04-14
2001-04-10
Chevalier, Robert (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06215953
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a duplication apparatus, and more particularly, to a duplication apparatus which automatically selects a copy mode being appropriate for the quality of a signal recorded on a source recording medium, to record the recorded signal of the source recording medium on a recording medium to be a duplication object.
As an example of a duplication apparatus, there is a dual deck VCR which includes two decks. The two decks can perform recording and playback, respectively. In this case, when tape is duplicated, information of a source tape reproduced from one deck is recorded on a blank tape loaded in the other deck. There are two types of duplication methods in case of a dual deck VCR, in which one is a first copy method (hereinafter referred to as a signal copy) for recording a final output which is played back from a deck set and displayed on a screen, that is, a signal which is frequency-modulated and demodulated again, and the other is a second copy method (hereinafter an frequency modulation (FM) copy) for recording an envelope signal which is picked up via a preamplifier. The signal copy method and an FM copy method can be selected on a menu screen by a user.
FIGS. 1A and 1B
are graphical views for comparing and illustrating FM bands of a high-quality (hereinafter referred to as Super-VHS or S-VHS tape) and a normal tape (hereinafter referred to as Normal-VHS or N-VHS). Here, a horizontal axis represents a frequency (f), and a vertical axis represents a gain. The S-VHS tape is different from the N-VHS tape in the case of the FM band on which the essential information is loaded. In
FIG. 1A
, a graph “A” represents a low-band converted carrier color signal, and a graph “B” represents an FM modulated luminance signal. A hatched portion of the FM modulated luminance signal “B” represents an FM carrier frequency deviation. The FM carrier frequency deviation (hatched portion) of the N-VHS is between 3.4 MHz and 4.4 MHz as shown in
FIG. 1A
, and the FM carrier frequency deviation (hatched portion) of the S-VHS is between 5.4 MHz and 7 MHz as shown in FIG.
1
B. The FM carrier frequency deviation on which the essential information is loaded is higher in the S-VHS than in the N-VHS. Accordingly, the S-VHS can be recorded and reproduced only via a high-definition VCR that is called a super VCR, and cannot be recorded and reproduced in a general VCR.
Therefore, a high-definition signal amplifier should be additionally provided in order to reproduce high-definition information from a tape in a general VCR. The high-definition signal amplifier amplifies a high-band portion on which the FM carrier frequency of the S-VHS is loaded, to thereby enable the high-definition signal to be reproduced. However, as shown in
FIGS. 1A and 1B
, since the FM signal band of the S-VHS on which the essential information is loaded is much different from that of the N-VHS, a high-band signal of a copied FM signal cannot be restored during reproduction. In other words, when a source tape is an S-VHS tape, signals can be recorded on an N-VHS tape, but the recorded signals cannot be restored on a screen. When a thus-recorded tape is played back, an image is processed as black on the screen. However, a signal copy which duplicates the final output from the deck set as it is, causes degradation of a picture quality but enables picture reproduction.
Thus, if a copy mode of the dual deck VCR is currently set to a signal copy mode, the information recorded on the S-VHS tape can be duplicated and reproduced. However, if a copy mode of the dual deck VCR is set to an FM copy mode, the information recorded on the S-VHS tape can be duplicated but cannot be reproduced.
If a user recognizes a copy mode according to the picture quality of a tape as described above, a copy mode may be manually set considering the picture quality of the tape. However, if a user does not know a copy mode, the user feels inconvenience in use of the VCR and may request an unnecessary after-service. Such a problem frequently occurs when a duplication operation is performed between recording mediums providing different qualities.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a duplication apparatus which discriminates the quality of a signal recorded on a source recording medium to select a copy mode being appropriate for the discriminated result, and duplicates the recorded signal of the source recording medium to a target recording medium to be a duplication object.
To accomplish the above object of the present invention, there is provided a duplication apparatus comprising:
a reproduction unit for reproducing a first signal recorded on a loaded first recording medium and signal-processing a reproduced first signal, to thereby output the reproduced first signal and a second signal obtained via signal-processing of the first signal; a recording unit for selecting one of the first signal and the second signal output from the reproduction unit, and recording the selected signal on a loaded second recording medium; and a control unit for controlling a selecting operation of the recording unit based on the second signal output from the reproduction unit,
the control unit controls the recording unit so that the first signal is recorded on the second recording medium when a signal of a first mode is recorded on the first recording medium, and so that the second signal is recorded on the second recording medium when a signal of a second mode is recorded on the first recording medium.
REFERENCES:
patent: 5627655 (1997-05-01), Okamoto et al.
patent: 5907443 (1999-05-01), Hirata
patent: 5982977 (1999-11-01), Naruse et al.
Chevalier Robert
Samsung Electronics Co,. Ltd.
Sughrue Mion Zinn Macpeak & Seas, PLLC
LandOfFree
Duplication apparatus having automatic select function of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Duplication apparatus having automatic select function of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Duplication apparatus having automatic select function of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2442708