System for digital transmission and synthesis of integrated data

• US 4,513,390 A
• Filed: 11/16/1981
• Issued: 04/23/1985
• Est. Priority Date: 06/08/1979
• Status: Expired due to Term

• Current Assignee: PRC, Inc. (Arthur D. Little, Inc.)
• Original Assignee: PRC, Inc. (Arthur D. Little, Inc.)
• Inventors: Sheppard, William D., Walter, Gerard O.
• Primary Examiner(s): Heckler, Thomas M.
• Application Number:
  US06/321,540
• Time in Patent Office: 1,254 Days
• Field of Search: 364/200 MS File, 364/900 MS File, 340/717, 340/716
• US Class Current: 345/501
• CPC Class Codes: G06F 3/005 Input arrangements through a video camera

Abstract

An image acquisition subsystem, electronic processing subsystem and workstation subsystem produce information management networks that are almost unlimited in size and scope in integrating data and information stored in both digital form and in human readable form. Integration is by on-demand conversion in a scanner/digitizer of data and information to a transmittable, compatible electric signal which is encoded and converted into human readable form at the workstation of an information requester. The scanner rejects improperly oriented microfiche and recognizes microfilm data in a right reading or reversing orientation. An electronic circuit presents the data to the system'"'"'s buffer in the right reading orientation regardless of a right or reverse reading input from microfiche. The scanner/digitizer regulates scanning speed in conformity with the data rate and capability of the transmission line to absorb the data. A microprocessor master module performs various functions with only minor hardware changes.

Claims

1. An information system for storage, retrieval, and generation of information from a plurality of multimedia sources, comprising an image-acquisition system, an electronic processing system, and a display workstation having a plurality of output modules, said electronic processing system including a serial input port module for receiving data from said image-acquisition system and coupling said data onto a local system bus, a program module coupled to said bus for directing the sequence and flow of information between said image-acquisition system and said display workstation via said electronic processing system, said workstation output modules being coupled to said bus, a functional control module coupled to said bus for controlling priority of operation of said workstation output modules coupled to said bus whereby said control module handles bus contention problems, a redundancy reduction module coupled to said bus for controlling the digital data rate of transfer of data through said bus, and a plurality of output port modules coupled to said bus for accessing various additional output modules including memory and communication modules.

2. The system of claim 1, wherein all of said output modules have I/O ports and are connected to a second system bus, and wherein a microprocessor module connected to said second bus includes a microprocessor, a memory, a direct memory access, I/O ports, and bus interrupt control, said second system bus including data lines, address lines, control lines and interrupt lines, said I/O ports of all of said output modules differing from one another to enable distinguishing the respective assigned module function, each said output module being otherwise identical, thereby facilitating ease of expansion and modification.

3. The system of claim 2 wherein said redundancy reduction module includes means responsive to redundant data strings from said image-acquisition system for producing a shortened code word, thereby reducing said redundant data.

4. The system of claim 2, wherein said system bus is further coupled to a facsimile transceiver.

5. The system of claim 1, wherein said workstation further comprises a local bus, a processor module coupled thereto, a plurality of output ports coupled to said bus including high and low-speed ports, an alphanumeric keyboard coupled to said bus, and local memory means coupled to said bus, said keyboard and said memory means cooperating with said processor module for controlling access to said ports.

6. An information system for the storage, retrieval, and generation of information for a plurality of multimedia sources, the system elements comprising image-acquisition means, electronic processing means, and a display workstation, said display workstation including two display screens, the first screen for display of high-resolution graphics, the second screen for display of alphanumeric characters, said electronic processing system disposed to process images acquired by said image-acquisition system, said display workstation disposed to display graphics derived from said processed images, said workstation further comprising a local bus, a processor module couped thereto, a plurality of output ports coupled to said bus including high and low-speed ports, an alphanumeric keyboard coupled to said bus, and local memory means coupled to said bus, said keyboard and said memory means cooperating with said processor module for controlling access to said ports, said system elements being connected to a system bus;

each of said system elements including at least one microprocessor module, a memory, a direct memory access, I/O ports, and bus interrupt control;

said local bus including data lines, address lines, control lines and interrupt lines;

said electronic processing means comprising a plurality of individual modules interfacing with said image-acquisition means and said display workstation, each of said individual modules having means for locally controlling said system, said individual modules being substantially identical.

7. System of claim 6, wherein said image-acquisition means comprises a plurality of storage media and said display station comprises a plurality of reproduction media, an instruction entry means for receiving instructions including retrieval instructions and reproduction instructions for said system, means responsive to any such entered instructions for selecting a desired storage medium from said plurality of media in accordance with any such retrieval instructions and for selecting a desired one of said reproducing media in accordance with any such reproduction instructions, means for incrementing scanning of said selected storage medium to produce a relatively high speed stream of data signals, means for converting said data signals to digital form, means for changing the rate of data flow of said stream of data signals in accordance with said selected reproduction instruction requirements, means for reducing the data flow of said data signals without reducing the information content, and means for transmitting said reduced data flow to said selected reproduction medium in accordance with said entered instructions, said reproduction medium reproducing a selected image from said data flow.

8. The system of claim 7, wherein said data signals are video data signals and further comprising a preview screen, said preview screen coupled to said video data signals for permitting the operator to view the data derived from said selected storage medium prior to transmission for reproduction, said video data signals including image signals, and wherein said means for scanning includes means for centering the image resulting from said image signals prior to scanning.

9. The system of claim 8, wherein said means for scanning includes a linear array of charge-coupled elements, a scan table, means for projecting an image of said storage medium onto said scan table, and means for together driving said linear array and said scan table through a projected image of said medium while said medium and its image remain stationary, thereby scanning said image, and further including limit switches positioned with respect to said table and de-energizing said driving means upon activation, for limiting the movement of said table.

10. The system of claim 9, further including a motor, said scan table and said array being driven by said motor through a flexible coupling connecting said motor to said table and said array, an angular resolver, said table and array including a further flexible coupling connected to said angular resolver for providing a location data signal corresponding to the precise location of said linear array, means responsive to said location data signal for enabling said linear array to be strobed across an entire line of said image, transverse to the drive direction, before moving to the next sequential line position on a scanned frame of said projected medium.

11. The system of claim 9, wherein said means for scanning scans on a line-by-line basis, and includes means for compacting said data, said means for compacting operating on a scan-line by scan-line basis, and wherein said means for scanning includes a line buffer for loading and unloading data on a scan-line by scan-line basis, means for sensing the unloading rate of said buffer, said means responsive to said rate for transmitting a scan-speed control signal to means controlling the rate of scan, said means for sensing responsive to a high pre-set unloading rate condition of said buffer for slowing said scan rate and to a low pre-set unloading rate condition of said buffer for speeding up said scan rate.

12. The system of claim 8, wherein said means for converting said data signals further includes analog to digital converter means, including first means for converting said digital signals to a series of binary ones and zeroes in accordance with each of one of sixteen steps of gray scale, and said scanning means further comprising a plurality of image cells and reference cell means, means for comprising signals from each successive image cell of said scanning means to signals from said reference cell means, said reference means signal serving as a zero gate value, said first means responsive to data from said signal comparing means and recognizing a one as being two or more gray value steps above the zero gate value, and a zero as all other data, said recognized zeroes and ones thus accomplishing said analog to digital conversion.

13. The system of claim 8, wherein said data signals are converted to strings of data bits and wherein data reduction by one-fourth is accomplished by means for masking every other data bit, said masking means further reducing data by deleting every other scan line.

14. The system of claim 13, further including means for expansion of said data by transmission of all of said masked and deleted data bits.

15. The system of claim 6, wherein said display workstation further includes a touch panel coupled thereto for interactive graphic manipulation of said displayed graphics.