US4984081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for receiving and selecting high-definition television (HDTV) signals and standard television (NTSC) signals
Assignee: Panasonic Holdings Corp
•
Filing: 1989-01-24
•
Granted: 1991-01-08
•
Expires: 2009-01-24
Abstract
Abstract An apparatus for receiving and selecting high-definition television signals and NTSC standard television signals includes a high-definition display screen device having an aspect ratio of 16 to 9. The NTSC standard television signals have an aspect ratio which is different than the 16 to 9 aspect ratio of the high-definition display screen device. A first signal converter is for converting the NTSC standard television signals into first quasi-high-definition television signals identifying a first displayed image corresponding in vertical length to a vertical length of the high-definition display screen device. A second signal converter is for converting the NTSC standard television signals into second quasi-high-definition television signals identifying a second displayed image corresponding in horizontal length to a horizontal length of the high-definition display screen device. Switching circuits are provided for selecting one of the high-definition television signals and the first and second quasi-high-definition television signals.
Inventors
- 👤 Toshihiro Miyoshi
- 👤 Masahiro Kawashima
- 👤 Hideyuki Ikuhara
- 👤 Tetsuo Kutsuki
- 👤 Kazuyasu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0117; H04N7/0122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
238 words
An apparatus for receiving and selecting high-definition television signals and NTSC standard television signals, said apparatus comprising: a first input terminal for receiving the NTSC standard television signals; a second input terminal for receiving the high-definition television signals; a high-definition display screen device having a first aspect ratio of 16 to 9; the NTSC standard television signals corresponding to a second aspect ratio which is different than said first aspect ratio of said high-definition display screen device; a first signal converter, coupled to said first input terminal, for converting the NTSC standard television signals into first quasi-high-definition television signals identifying a first displayed image corresponding in vertical length to a vertical length of said high-definition display screen device; a second signal converter, coupled to said first input terminal, for converting the NTSC standard television signals into second quasi-high-definition television signals identifying a second displayed image corresponding in horizontal length to a horizontal length of the high-definition display screen device; first switching means, coupled to said first and second signal converters, for selecting and outputting one of said first and second quasi-high-definition television signals; and, second switching means, coupled to said first switching means and said second input terminal and said high-definition display screen device, for selecting and outputting to said high-definition display screen device one of said high-definition television signals and said one of said first and second quasi-high-definition television signals selected and outputted by said switching means.
Claim 2
Independent Claim
238 words
An apparatus for receiving and selecting high-definition television signals and NTSC standard television signals, said apparatus comprising: a first input terminal for receiving the NTSC standard television signals; a second input terminal for receiving the high-definition television signals; a high-definition display screen device having a first aspect ratio of 16 to 9; the NTSC standard television signals corresponding to a second aspect ratio which is different than said first aspect ratio of said high-definition display screen device; a first signal converter, coupled to said first input terminal, for converting the NTSC standard television signals into first quasi-high-definition television signals identifying a first displayed image corresponding in vertical length to a vertical length of said high-definition display screen device; a second signal converter, coupled to said first input terminal, for converting the NTSC standard television signals into second quasi-high-definition television signals identifying a second displayed image corresponding in horizontal length to a horizontal length of the high-definition display screen device; first switching means, coupled to said first and second signal converters, for selecting and outputting one of said first and second quasi-high-definition television signals; and, second switching means, coupled to said first switching means and said second input terminal and said high-definition display screen device, for selecting and outputting to said high-definition display screen device one of said high-definition television signals and said one of said first and second quasi-high-definition television signals selected and outputted by said switching means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |