Multimedia system

• US 5,434,590 A
• Filed: 10/14/1993
• Issued: 07/18/1995
• Est. Priority Date: 12/11/1990
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Wilkie, Bruce J., Dinwiddie, John M. Jr., Suarez, Gustavo A., Freeman, Bobby J.
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): FATAHI YAR, MAHMOUD
• Application Number:
  US08/136,724
• Time in Patent Office: 642 Days
• Field of Search: 345/113, 345/114, 345/115, 345/116, 345/119, 395/153, 395/154, 348/6, 348/13, 348/15, 348/16, 348/17, 379/53, 379/54
• US Class Current: 345/634
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G09G 1/16 the pattern of rectangular co-ordinates extending over the whole area of the screen, i.e. television type raster
• CPC Class Codes: G09G 1/167 Details of the interface to the display terminal specific for a CRT details suitable for both CRT and flat panel G09G5/006, specific for a flat panel G09G3/2096
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: H04N 21/4143 embedded in a Personal Computer [PC]
• CPC Class Codes: H04N 5/262 Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Abstract

An information handling apparatus for transferring and composing image signals including a plurality of media sources configured to provide a corresponding plurality of image signals, a media bus connected to the media sources, and a media control module coupled to the media bus. The media bus allows selective access for the plurality of image signals. The selective access enables composition of the independent image signals in response to control information. The media control module receives a composed image signal from the media bus and provides the composed image signal to a display device.

Claims

1. An information handling apparatus for transferring and composing image signals in synchronism with a predetermined display time frame, said apparatus comprising:

a plurality of media sources configured to continuously provide a corresponding plurality of image signals, said sources being capable of concurrently generating image signals representing components of displayable images, at least one of said image signals being an analog image signal,

a media bus connected to said media sources,

means for allowing selective access to said media bus for one of said plurality of media sources at a time, in predetermined time relation to said display time frame,

said media sources being directly connected to said media bus via said means for allowing selective access.

said selective access permitting time interleaved mixing of image signals generated by plural said sources to form a composed image signal at said media bus that is synchronized with said display frame and contains component images produced by said plural generating sources, said composed image signal representing an image to be displayed, and

a media control module coupled to said media bus,

said media control module receiving and processing said composed image signal formed at said media bus to translate said composed image signal into a signal form directly suitable for operating a display device to produce a display image corresponding directly to said composed image signal.

2. The apparatus of claim 1 wherein

said media control module is configured to supply control information to said media sources for controlling said sources to operate in relative time synchronism to each other to form said composed image signal on said media bus.

3. The apparatus of claim 1 wherein

said composed image signal, formed at said media bus by said selective access of said media sources, may include pixel signals from plural said sources representing pixel components of a composite image to be visibly displayed during a said display time frame.

4. The apparatus of claim 1 wherein

signals presented individually by plural said sources, to form said composed image signal, individually represent virtual screens of information.

5. The apparatus of claim 1 further comprising

a plurality of media bus interface circuits corresponding to said plurality of media sources,

each said media bus interface circuit being configured to allow said selective access to said media bus for a respective media source.

6. The apparatus of claim 1 wherein

said display time frame is synchronized with display tracing operations of a display device, said display tracing operations occurring at a predetermined rate, and

said signals supplied by said media sources to form said composed image signals are synchronized individually in real time to discrete portions of said display time frame.

7. The apparatus of claim 1 further comprising

a system bus connected to said plurality of media sources,

said system bus being configured to transport input/output information between said plurality of media sources.

8. The apparatus of claim 1 wherein

said plurality of media sources include a processor module,

said processor module being configured to provide image signals.

9. The apparatus of claim 1 wherein

said plurality of media sources includes a programmable receiver module configured to receive full motion video transmissions and to generate full motion video signals.

10. The apparatus of claim 9 wherein

said full motion video transmissions are provided by an analog full motion video source.

11. The apparatus of claim 9 wherein

said full motion video transmissions are electromagnetic transmissions provided by a remote transmitter.

12. The apparatus of claim 1 wherein

said plurality of media sources include

a processor module configured to provide image signals, and

a programmable receiver module configured to receive full motion video transmissions and to generate full motion video signals.

13. An information handling apparatus for transferring and composing image signals in synchronism with a predetermined time frame comprising:

a media source configured to continuously provide an analog image signal,

a media bus connected to said media source,

means for conditioning said media source to access said media bus only during selected portions of said time frame and to transfer signals to said bus during said selected time frame portions representing discrete components of a displayable image,

said selective access enabling said signals transferred to said bus to be directly mixed with other signals at said bus to form a composed image signal,

said media source being directly connected to said media bus via said conditioning means, and

a media control module coupled to said media bus,

said media control module receiving said composed image signal from said media bus and processing said composed image signal to form a final image signal directly presentable to a display device.

14. The apparatus of claim 13 wherein

said media control module is adapted to supply control information to said media source conditioning means for controlling formation on said media bus of said composed image signal.

15. The apparatus of claim 13 wherein

said display frame is synchronized to display tracing operations of a display device and said conditioning means conditions said media source to transfer signals to said media bus representing discrete points of a displayable image at time positions relative to said frame corresponding to instants at which corresponding image points are traced by said display device.

16. The apparatus of claim 13 wherein

said signals transferred by said media source to said media bus represent a virtual screen of image information.

17. The apparatus of claim 13 wherein

said display time frame is synchronized in real time to display tracing operations of a said display device,

said display device traces display points defined by said final image signal at a predetermined rate, and

formation of said composed said image signals at said media bus and said final image signal occur in real time with said display tracing operations of said display device.

18. The apparatus of claim 13 further comprising

a media bus interface circuit corresponding to said media source,

said media bus interface circuit being configured to allow said selective access to said media bus for said respective media source.

19. The apparatus of claim 13 wherein

said media source includes a processor module,

said processor module being configured to provide an image signal.

20. The apparatus of claim 13 wherein

said media source includes a programmable receiver module configured to receive full motion video transmissions and to generate a full motion video signal.

21. The apparatus of claim 20 wherein

said full motion video transmissions are provided by an analog full motion video source.

22. The apparatus of claim 20 wherein

said full motion video transmissions are electromagnetic transmissions provided by a remote transmitter.