Patent EP0440408A1 successfully refreshed from Google Patents.
EP0440408A1
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Recording and reproduction method and apparatus
Assignee: Pioneer Corp
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Filing: 1991-01-29
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Granted: —
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Expires: 2011-01-29
Abstract
Abstract A modulation signal carrying a composite video signal (4) representing a screen image composed of reduced frames corresponding to a plurality of channels and a modulation signal (13) carrying a digital graphics signal are subjected to frequency multiplexing (5), and the multiplex signal is recorded to a single record medium (14) utilizing its capacity effectively. During reproduction, one reduced frame and a frame of the graphics are displayed simultaneously.
Inventors
- 👤 Toshiji C/O Pioneer Daito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/9201; H04N5/9202; H04N5/9205; H04N5/9206; H04N9/00; H04N9/79; H04N9/80; H04N9/802
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
A recording method comprising: forming a first modulation signal carrying a composite video signal representing a screen image composed of reduced frames corresponding to a plurality of channels; forming a second modulation signal carrying a digital graphics signal; forming a frequency-division multiplex signal by frequency multiplexing of the second modulation signal to the first modulation signal; and recording the multiplex signal on a record medium.
Claim 2
Dependent Claim
47 words
A recording method as set forth in claim 1, wherein said first modulation signal is a signal obtained by said composite video signal, and said second modulation signal is a signal obtained by EFM modulation of a CD-ROM or CD-I format signal including said digital graphics signal.
Claim 3
Dependent Claim
28 words
A recording method as set forth in claim 2 wherein said CD-ROM or CD-I format signal includes an audio signal other than that of the plurality of channels.
Claim 4
Dependent Claim
33 words
A recording method as set forth in claim 1, 2 or 3 wherein said multiplex signal includes a third modulation signal carrying audio corresponding to the video signal of the plurality of channels.
Claim 5
Independent Claim
84 words
A method of reproducing a recording made by a method of any preceding claim, comprising: reading said multiplex signal from said record medium; designating at least one channel among the plurality of channels during reproduction; extracting and demodulating the composite video signal and the graphics signal from the multiplex signal read from the record medium; and substituting the obtained graphics signal for a portion of the display frame other than a reduced frame corresponding to the designated channel of the obtained composite video signal.
Claim 6
Dependent Claim
13 words
A record recorded by the method of any of claims 1 to 4.
Claim 7
Dependent Claim
102 words
A reproduction apparatus for playing a record medium produced by the method of any of claims 1 to 4, comprising: means for reading said multiplex signal from said record medium; means for designating at least one channel among a plurality of channels; means for extracting and demodulating a composite video signal and a graphics signal from said multiplex signal read from said record medium; and signal substitution means for substituting said obtained graphics signal for a portion of the display frame other than that corresponding to the designated channel of said composite video signal obtained by said means for extracting and demodulating.
References Cited (Backward Citations)
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