Patent US4982288A successfully refreshed from Google Patents.
US4982288A
Expired / Lapsed
US
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High definition television receiver enabling picture-in picture display
Assignee: Panasonic Holdings Corp
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Filing: 1989-02-16
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Granted: 1991-01-01
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Expires: 2009-02-16
Abstract
Abstract A television signal receiving apparatus of the type in which when performing a picture in picture operation by receiving a plurality of picture signals compressed in band width by multiple sub-Nyquist sampling, a sub-channel signal is first subjected to a spatial interpolating process and combined with a main-channel signal. The still picture portion and moving picture portion of a first input signal are restored to a field offset sub-sampled first picture signal, and a second input signal is restored to a field offset sub-sampled picture signal, subjected to a size-reducing process by time base compression in the vertical and horizontal directions of the picture and delivered as a second picture signal of the form synchronized in phase with a given position of the first picture signal. The first and second picture signals are time-division multiplexed to deliver a third picture signal onto a picture screen.
Inventors
- 👤 Mitsuo Isobe
- 👤 Masanori Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:06
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/015; H04N7/0152; H04N5/00; H04N5/44; H04N5/445; H04N5/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A television signal receiving apparatus enabling a picture-in-picture display function for receiving multiple subNyquist sampling band-compressed high definition television signals, said apparatus comprising: a first signal processing circuit for receiving and processing a first input television signal for providing a main picture display of said high definition television signals, said first input signal processing circuit comprising means for performing (i) interframe interpolation processing and interfield interpolation processing on a still picture portion of said first television signal by using picture signals of two substantially adjacent-frames and (ii) two-dimensional spatial interpolation processing on a motion picture portion in horizontal and vertical directions in a single field signal of said first input television signal to provide a first processed picture signal; a second signal processing circuit for receiving and processing a second input television signal for providing a sub-picture display of said high definition television signals, said second signal processing circuit comprising means for performing a two-dimensional spatial interpolation processing and a time-base compression processing on both a still picture portion and a motion picture portion of said second input television signal to provide a second processed picture signal; and a signal selection circuit for receiving and timedivisionally multiplexing the first and second processed picture signals supplied from said first and second signal processing circuits to deliver a single picture-in-picture output signal.
Claim 2
Dependent Claim
220 words
A television signal receiving apparatus enabling a picture-in-picture display function for receiving multiple subNyquist sampling band-compressed high definition television signals, said apparatus comprising: a first signal processing circuit for receiving and processing a first input television signal for providing a main picture display of said high definition television signals, said first input signal processing circuit comprising means for performing (i) interframe interpolation processing and interfield interpolation processing on a still picture portion of said first television signal by using picture signals of two substantially adjacent-frames and (ii) two-dimensional spatial interpolation processing on a motion picture portion in horizontal and vertical directions in a single field signal of said first input television signal to provide a first processed picture signal; a second signal processing circuit for receiving and processing a second input television signal for providing a sub-picture display of said high definition television signals, said second signal processing circuit comprising means for performing a two-dimensional spatial interpolation processing and a time-base compression processing on both a still picture portion and a motion picture portion of said second input television signal to provide a second processed picture signal; and a signal selection circuit for receiving and timedivisionally multiplexing the first and second processed picture signals supplied from said first and second signal processing circuits to deliver a single picture-in-picture output signal.
References Cited (Backward Citations)
JPS492419A
Cited
US4853765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |