Patent EP0487092A2 successfully refreshed from Google Patents.
EP0487092A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wide picture video recording/reproducing system
Assignee: Hitachi Ltd
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Filing: 1991-11-21
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Granted: —
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Expires: 2011-11-21
Abstract
Abstract A video tape recorder allows a normal video signal for an aspect ratio of 4 : 3 or a wide-picture video signal for a greater aspect ratio of, for example, 16 : 9 to be selectively recorded/reproduced onto and from a magnetic tape. In order to identify which of the aspect ratios the reproduced video signal is based on, a recording mode signal indicative of the aspect ratio is recorded on the magnetic tape together with the video signal. A code signal or a pilot signal is used for the recording mode signal. In the reproducing operation, the aspect ratio of a reproduced picture is recognized from the recording mode signal, and a signal indicative of the aspect ratio is delivered to an external device, such as television set, together with reproduced video/audio signals. In a case where the reproduced picture is a wide picture and where the external device is not conformed to the wide picture, the aspect ratio of the video signal is changed. The television set suited to the features of the video tape recorder is also disclosed.
Inventors
- 👤 Shigeyuki Itoh
- 👤 Atsushi Yoshioka
- 👤 Iwao Aizawa
- 👤 Michio Masuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/928; H04N9/00; H04N9/79; H04N9/7921; H04N9/7925
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
A video tape recorder for recording and reproducing video signals onto and from a magnetic ape, comprising: means for selectively accepting as the video signals to be recorded, a video signal for a first aspect ratio (width-to-height ratio of a screen) and a video signal for a second aspect ratio greater than the first aspect ratio for a wider screen; aspect ratio discrimination means for determining the aspect ratio of the video signal to be recorded; means for generating a recording mode signal indicative of a result obtained from said aspect ratio discrimination means; and recording means provided with a plurality of rotary recording heads, for recording the recording mode signal together with the video signal to be recorded onto said magnetic tape by the use of said rotary recording heads.
Claim 2
Dependent Claim
26 words
A video tape recorder according to claim 1, wherein the first aspect ratio is 4 : 3, while the second aspect ratio si 16 : 9.
Claim 3
Dependent Claim
56 words
A video tape recorder according to claim 1, wherein the recording mode signal contains a code which represents the aspect ratio, and said recording means records the recording mode signal in that recording area on said magnetic tape which differs from a recording area for the video signal, by the use of said rotary recording heads.
Claim 4
Dependent Claim
36 words
A video tape recorder according to claim 3, wherein the recording mode signal further contains a code which represents a sort of an input device which is adapted to be used for inputting the video signal.
Claim 5
Dependent Claim
54 words
A video tape recorder according to claim 1, wherein the recording mode signal is a pilot signal of fixed frequency which indicates the second aspect ratio, and said recording means records the video signal to be recorded in which the pilot signal is frequency-multiplexed within a vertical retrace period thereof, on said magnetic tape.
Claim 6
Dependent Claim
94 words
A video tape recorder according to claim 1, further comprising output means for delivering the video signal to an external device, input means for receiving from said external device a "wide" device identifying signal which indicates that said external device is a "wide" device conformed to the second aspect ratio, and aspect ratio change means for changing the aspect ratio of the video signal which is to be delivered to said external device, on the basis of the "wide" device identifying signal and the signal indicative of the aspect ratio of the video signal.
Claim 7
Dependent Claim
58 words
A video tape recorder according to claim 6, wherein said aspect ratio change means changes the video signal of the second aspect ratio to that of the first aspect ratio on conditions that the aspect ratio of the video signal to be delivered is the second aspect ratio and that said external device is not the "wide" device.
Claim 8
Dependent Claim
28 words
A video tape recorder according to claim 5, wherein the frequency of the pilot signal is in a frequency-interleaved relationship to a luminance signal of the video signal.
Claim 9
Dependent Claim
29 words
A video tape recorder according to claim 6, further comprising output means for supplying said external device with the signal indicative of the aspect ratio of the video signal.
Claim 10
Dependent Claim
39 words
A video tape recorder according to claim 1, further comprising second aspect ratio discrimination means for discriminating the aspect ratio of the vide signal reproduced from said magnetic tape, on the basis of the recording mode signal reproduced therefrom.
Claim 11
Dependent Claim
39 words
A video tape recorder according to claim 5, further comprising second aspect ratio discrimination means for discriminating the aspect ratio of the video signal reproduced from said magnetic tape, on the basis of the recording mode signal reproduced therefrom.
Claim 12
Dependent Claim
42 words
A video tape recorder according to claim 11, further comprising trap means for removing the pilot signal multiplexed within the vertical retrace period, from the reproduced video signal on the basis of an output signal of said second aspect ratio discrimination means.
Claim 13
Dependent Claim
47 words
A video tape recorder according to claim 3, wherein the recording mode signal is recorded in that area on said magnetic tape which lies between the video signal recording area and a PCM recording area separate from the video signal recording area, for recording audio PCM data.
Claim 14
Dependent Claim
40 words
A video tape recorder according to claim 13, further comprising means for storing digital still picture data, means for converting the digital still picture data into PCM data, and means for recording the PCM data in said PCM recording area.
Claim 15
Dependent Claim
44 words
A video tape recorder according to claim 14, further comprising means for generating an identification signal which indicates that the digital still picture data is of the second aspect ratio, and which is recorded in said PCM recording area together with the PCM data.
Claim 16
Dependent Claim
55 words
A video tape recorder for recording and reproducing video signals onto and from a magnetic tape, further comprising means for receiving a television broadcast signal and a "wide" decoder which decodes the television broadcast signal into video and audio baseband signals, and which produces a signal indicative of the aspect ratio of the video signal.
References Cited (Backward Citations)
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