Video signal recording apparatus
First Claim
1. An apparatus for recording a selected one of at least two different types of video signals characterized by different numbers of effective scanning lines and different durations of the video parts in the respective effective scanning lines, comprising:
- analog-to-digital conversion means for converting an input video signal of said selected one type into corresponding digital signals;
digital signal processing means for successively writing and reading, and thereby temporarily storing, samples of said digital signals from said analog-to-digital conversion means;
digital-to-analog conversion means for converting digital signals read by said digital signal processing means into analog signals;
recording signal processing means receiving said analog signals and processing the same to provide a recording signal for recording on a recording medium; and
control means for said digital signal processing means operative to select the samples of said digital signals which are successively written, or read from said digital signal processing means so as to limit, in said recording signal, at least one of the number of said effective scanning lines and the duration of the video part in each said effective scanning line to the least of said different numbers of effective scanning lines and the shortest of said different durations, respectively, irrespective of the type of said input video signal.
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Accused Products
Abstract
In an apparatus for recording a selected one of at least two different types of video signals, such as, a studio standard video signal and a video signal transmitted in the MUSE system, which are respectively characterized by different numbers of effective scanning lines and different durations of the video parts in the respective effective scanning lines, analog-to-digital conversion circuits convert an input video signal of the selected type into digital signals, a digital signal processing ciruit successively writes and reads, and thereby temporarily stores, samples of the digital signals from the analog-to-digital conversion circuits, digital-to-analog conversion circuits convert digital signals read by the digital signal processing circuit into analog signals, a recording signal processing circuit receives such analog signals and processes the same to provide a recording signal for recording on a recording medium, and a control circuit for the digital signal processing circuit is operative to select the samples of the digital signal which are successively written, or read from the digital signal processing circuit so as to limit, in the recording signal, the number of the effective scanning lines and/or the duration of the video part in each of the effective scanning lines to the least of the different numbers of effective scanning lines and the shortest of the different durations.
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Citations
12 Claims
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1. An apparatus for recording a selected one of at least two different types of video signals characterized by different numbers of effective scanning lines and different durations of the video parts in the respective effective scanning lines, comprising:
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analog-to-digital conversion means for converting an input video signal of said selected one type into corresponding digital signals; digital signal processing means for successively writing and reading, and thereby temporarily storing, samples of said digital signals from said analog-to-digital conversion means; digital-to-analog conversion means for converting digital signals read by said digital signal processing means into analog signals; recording signal processing means receiving said analog signals and processing the same to provide a recording signal for recording on a recording medium; and control means for said digital signal processing means operative to select the samples of said digital signals which are successively written, or read from said digital signal processing means so as to limit, in said recording signal, at least one of the number of said effective scanning lines and the duration of the video part in each said effective scanning line to the least of said different numbers of effective scanning lines and the shortest of said different durations, respectively, irrespective of the type of said input video signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification