Patent US4996598A successfully refreshed from Google Patents.
US4996598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for processing video signal
Assignee: Mitsubishi Electric Corp
•
Filing: 1989-07-19
•
Granted: 1991-02-26
•
Expires: 2009-07-19
Abstract
Abstract An apparatus for processing a video signal related to signal processing for use in superimposing a graphic image such as characters and patterns on a video signal, in which two buses being conventionally necessary for controlling displaying contents are decreased to a single bus over which the graphic image data and process control command are transmitted by time-division multiplexing at the timings in synchronism with the video signal, whereby its hardware structure is simplified and, in addition, it is made possible to perform smooth switching over between different display contents.
Inventors
- 👤 Zenichiro Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:55
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/272; H04N5/44; H04N5/445; H04N5/44504
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
An apparatus for processing a video signal comprising: a first memory for storing video image data obtained from a video signal; a second memory for storing graphic image data such as characters and patterns; a first bus connecting both said first and said second memories to a display and allowing for selective transmission of image data read from either of said first and said second memories to said display; a second bus, connected to both said first and said second memories, for transmitting said graphic image data stored in said second memory and control command data relating to processing said image data using time-division multiplex transmission; and a signal generating means for synchronously controlling the time-division multiplex transmission of data over said second bus such that said graphic image data are transmitted to said second memory during the scanning period of said video signal and said control command data are transmitted to said first memory during the flyback period of said video signal.
Claim 2
Independent Claim
163 words
An apparatus for processing a video signal comprising: a first memory for storing video image data obtained from a video signal; a second memory for storing graphic image data such as characters and patterns; a first bus connecting both said first and said second memories to a display and allowing for selective transmission of image data read from either of said first and said second memories to said display; a second bus, connected to both said first and said second memories, for transmitting said graphic image data stored in said second memory and control command data relating to processing said image data using time-division multiplex transmission; and a signal generating means for synchronously controlling the time-division multiplex transmission of data over said second bus such that said graphic image data are transmitted to said second memory during the scanning period of said video signal and said control command data are transmitted to said first memory during the flyback period of said video signal.
Claim 3
Dependent Claim
37 words
An apparatus for processing a video signal according to claim 1, wherein said signal generating unit is connected to control means through a standardized interface and said control means is adapted to control said signal generating unit.
Claim 4
Dependent Claim
23 words
An apparatus for processing a video signal according to claim 2, wherein said control means includes general-purpose hardware such as a personal computer.
Claim 5
Dependent Claim
28 words
An apparatus for processing a video signal according to claim 2, wherein said signal generating unit has a third memory for storing graphic image data of plural frames.
Claim 6
Dependent Claim
31 words
An apparatus for processing a video signal according to claim 2 or claim 4, wherein said signal generating unit has a disk unit for storing graphic image data of plural frames.
References Cited (Backward Citations)
US4729022A
Cited
US4636858A
Cited
US4908700A
Cited
US4905077A
Cited
US4839728A
Cited
US4930014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |