US5307458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Input/output coprocessor for printing machine
Assignee: Xerox Corp
•
Filing: 1991-12-23
•
Granted: 1994-04-26
•
Expires: 2011-12-23
Abstract
Abstract An improved printing machine for concurrently processing first and second sets of image data is provided. The printing machine preferably comprises a video processor, capable of processing the first set of image data, a system memory, adapted to store the second set of image data, and a bus for transmitting image data, addresses and control data thereacross. Both of the video processor and the system memory are coupled with the bus. Additionally, an apparatus for transferring the second set of image data between the input/output device and the system memory substantially concurrent with the first set of image data being processed in the video processor is provided. The transferring apparatus preferably transfers the second set of image data in response to receiving a signal from the input/output device.
Inventors
- 👤 Joseph A. Freiburg
- 👤 Isaak Rivshin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:37
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/10; G06F13/12; G06F13/124; H; H04; H04N; H04N1/00; H04N1/32; H04N1/32358; H04N2201/00; H04N2201/32; H04N2201/3285; H04N2201/3287; H04N2201/3288
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
A method of processing first and second sets of image data, comprising the steps of: processing the first set of image data in a video processing section with a first memory; transmitting the second set of image data in a coprocessing section, at a first data transfer rate, from an input/output device to a second memory for storage therein, the transmission step being concurrent with the processing step; accessing the video processing section with the coprocessing section, for a selected time interval, to transmit the second set of image data from the second memory to the first memory; transmitting the second set of image data at a second data transfer rate from the second memory to the first memory, the second data transfer rate being substantially greater than the first data transfer rate wherein the selected time interval during which the coprocessing section accesses the video processing section for transferring the second set of image data to the first memory is minimized; and periodically allocating time intervals during which the coprocessing section accesses the video processor.
Claim 2
Independent Claim
176 words
A method of processing first and second sets of image data, comprising the steps of: processing the first set of image data in a video processing section with a first memory; transmitting the second set of image data in a coprocessing section, at a first data transfer rate, from an input/output device to a second memory for storage therein, the transmission step being concurrent with the processing step; accessing the video processing section with the coprocessing section, for a selected time interval, to transmit the second set of image data from the second memory to the first memory; transmitting the second set of image data at a second data transfer rate from the second memory to the first memory, the second data transfer rate being substantially greater than the first data transfer rate wherein the selected time interval during which the coprocessing section accesses the video processing section for transferring the second set of image data to the first memory is minimized; and periodically allocating time intervals during which the coprocessing section accesses the video processor.
Claim 3
Dependent Claim
35 words
The method of claim 1, further comprising the step of buffering image data in the video processing section concurrent with transmitting the second set of image data from the second memory to the first memory.
References Cited (Backward Citations)
US4205350A
Cited
US4169275A
Cited
US4580171A
Cited
US4672186A
Cited
US4800431A
Cited
US4920427A
Cited
US4833596A
Cited
US4920481A
Cited
US5021892A
Cited
US5016114A
Cited
US4931984A
Cited
US4897735A
Cited
US4987529A
Cited
US5170466A
Cited
US5142667A
Cited
US5027221A
Cited
US5038218A
Cited
US5170263A
Cited
US5223948A
Cited
US5130809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |