Video multiplexor-encoder and decoder-converter

• US 5,351,129 A
• Filed: 03/24/1992
• Issued: 09/27/1994
• Est. Priority Date: 03/24/1992
• Status: Expired due to Term

• Current Assignee: Lamow Pierce Ganow, LLC
• Original Assignee: RGB Technology
• Inventors: Lai, Patrick
• Primary Examiner(s): Powell, Mark R.
• Assistant Examiner(s): Miller, John W.
• Application Number:
  US07/856,584
• Time in Patent Office: 917 Days
• Field of Search: 358/181, 358/183, 358/22, 395/153, 395/154, 340/721
• US Class Current: 348/584
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 5/2624 for obtaining an image which is composed of whole input images, e.g. splitscreen
• CPC Class Codes: H04N 7/088 the inserted signal being digital
• CPC Class Codes: H04N 7/24 Systems for the transmission of television signals using pulse code modulation H04N21/00 takes precedence
• CPC Class Codes: H04N 9/641 Multi-purpose receivers, e.g. for auxiliary information H04N9/642 takes precedence

Abstract

A video multiplexor-encoder and decoder-converter includes a video multiplexor and encoder for selectively receiving, time-division multiplexing and encoding multiple video signals representing multiple video images for transfer and simultaneous display thereof in a selected pattern of multiple video windows on a video display device, and further includes a decoder and video converter for receiving, decoding and converting an encoded, time-division multiplexed video signal for selective, simultaneous display of the multiple video images in the selected pattern of multiple video windows on a video display device. The encoded, multiplexed video signal includes display control data which selectively represent a position, size and relative visibility priority for each one of the video images within the selected display pattern of multiple video windows.

Claims

1. A video multiplexor-encoder for receiving, time-division multiplexing and encoding a plurality of video signals representing a plurality of video imaged for transfer and simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video multiplexor-encoder comprising:

multiplexor means for receiving and selectively time-division multiplexing a plurality of asynchronous video signals which represent a plurality of corresponding video images to produce a corresponding multiplexed video signal; and

encoder means coupled to the multiplexor means for receiving and selectively encoding the multiplexed video signal so as to include display control data.

2. A video multiplexor-encoder as recited in claim 1, further comprising computer means coupled to the encoder means for programmably providing the display control data thereto.

3. A video multiplexor-encoder as recited in claim 1, wherein the multiplexor means comprises:

a video multiplexor for receiving multiplex control data and in accordance therewith time-division multiplexing the received plurality of video signals; and

an analog-to-digital converter coupled to the video multiplexor for receiving and converting the time-division multiplexed plurality of video signals to the multiplexed video signal.

4. A video multiplexor-encoder as recited in claim 3, further comprising computer means coupled to the encoder means and the multiplexor means for programmably providing the display control data and the multiplex control data thereto, respectively.

5. A video multiplexor-encoder as recited in claim 1, wherein the encoder means comprises:

computer means for programmably providing the display control data;

memory means coupled to the computer means and the multiplexor means for receiving and storing the display control data and the multiplexed video signal; and

a digital-to-analog converter coupled to the memory means for receiving and converting the stored display control data and the stored multiplexed video signal to an analog, encoded, multiplexed video signal.

24. A video multiplexor-encoder as recited in claim 1, wherein said display control data represents data selected from the group consisting of a position, a size and a relative visibility priority for each one of the plurality of corresponding video images within a display pattern of a plurality of video windows.

6. A video multiplexor-encoder for receiving, time-division multiplexing and encoding a plurality of video signals representing a plurality of video images for transfer and simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video multiplexor-encoder comprising:

a video multiplexor for receiving multiplex control data and in accordance therewith receiving and time-division multiplexing a plurality of video signals which represent a plurality of corresponding video images;

an analog-to-digital converter coupled to the video multiplexor for receiving and converting the time-division multiplexed plurality of video signals to a digital multiplexed video signal;

memory means coupled to the analog-to-digital converter for receiving and storing the digital multiplexed video signal, and for receiving and storing display control data which selectively represent a position, size and relative visibility priority for each one of the plurality of corresponding video images within a display pattern of a plurality of video windows; and

a digital-to-analog converter coupled to the memory means for receiving and converting the stored display control data and the stored digital multiplexed video signal to an analog, encoded, multiplexed video signal.

7. A video multiplexor-encoder as recited in claim 6, further comprising a computer coupled to the memory means and the video multiplexor for programmably providing the display control data and the multiplex control data thereto, respectively.

8. A video decoder-converter for receiving, decoding and converting an encoded, time-division multiplexed video signal representing a plurality of video images for simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video decoder-converter comprising:

decoder means for receiving and decoding an encoded, time-division multiplexed video signal by copying display control data included therein; and

converter means coupled to the decoder means for receiving the copied display control data and in selective accordance therewith receiving and converting the encoded, time-division multiplexed video signal to provide a unified video signal which represents the plurality of video images.

9. A video decoder-converter as recited in claim 8, wherein the decoder means comprises a computer for receiving the digital, encoded multiplexed video signal and copying the display control data included therein.

10. A video decoder-converter as recited in claim 8, wherein the converter means comprises:

display memory means for receiving a plurality of memory write addresses and in accordance therewith receiving and storing the encoded, time-division multiplexed video signal, and for retrieving and outputting the stored encoded, time-division multiplexed video signal as a video display signal which represents the plurality of video images within the display pattern of the plurality of video windows; and

address generator means coupled to the decoder means and the display memory means for receiving the copied display control data and in selective accordance therewith providing the plurality of memory write addresses.

11. A video decoder-converter as recited in claim 10, wherein the display memory means comprises:

first memory means for receiving and storing the encoded, time-division multiplexed video signal, and for providing a first plurality of stored video data; and

second memory means coupled to the first memory means and the address generator means for receiving the plurality of memory write addresses and in accordance therewith receiving the first plurality of stored video data, and for providing a second plurality of stored video data as the video display signal.

12. A video decoder-converter as recited in claim 10, wherein the converter means further comprises RAMDAC means for receiving the video display signal and providing a selectively color-mapped, analog video signal as the unified video signal.

26. A video decoder-converter as recited in claim 8, wherein said display control data represents data selected from the group consisting of a position, a size and a relative visibility priority for each one of a plurality of video images within a display pattern of a plurality of video windows.

13. A video decoder-converter for receiving, decoding and converting an encoded, time-division multiplexed video signal representing a plurality of video images for simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video decoder-converter comprising:

an analog-to-digital converter for receiving and converting an encoded, time-division multiplexed video signal which includes display control data to a digital, encoded multiplexed video signal which includes digital control data corresponding to the display control data, wherein the display control data selectively represent a position, size and relative visibility priority for each one of a plurality of video images within a display pattern of a plurality of video windows;

computer means coupled to the analog-to-digital converter for receiving the digital, encoded multiplexed video signal and copying the digital control data included therein;

display memory means coupled to the analog-to-digital converter for receiving a plurality of memory write addresses and in accordance therewith receiving and storing the digital, encoded multiplexed video signal, and for retrieving and outputting the stored digital, encoded multiplexed video signal as a video display signal which represents the plurality of video images within the display pattern of the plurality of video windows; and

address generator means coupled to the computer means and the display memory means for receiving the copied display control data and in selective accordance therewith providing the plurality of memory write addresses.

14. A video decoder-converter as recited in claim 13, wherein the display memory means comprises:

first memory means for receiving and storing the digital, encoded multiplexed video signal, and for providing a first plurality of stored video data; and

second memory means coupled to the first memory means and the address generator means for receiving the plurality of memory write addresses and in accordance therewith receiving the first plurality of stored video data, and for providing a second plurality of stored video data as the video display signal.

15. A video decoder-converter as recited in claim 13, further comprising a RAMDAC for receiving the video display signal and providing a selectively color-mapped, analog video signal which represents the plurality of video images within the display pattern of the plurality of video windows.

16. A video multiplexing-encoded method for receiving, time-division multiplexing and encoding a plurality of video signals representing a plurality of video images for transfer and simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video multiplexing-encoding method comprising the steps of:

receiving a plurality of asynchronous video signals which represent a plurality of corresponding video images;

selectively time-division multiplexing the plurality of video signals for providing a multiplexed video signal; and

selectively encoding the multiplexed video signal by combining display control data therewith.

17. A video multiplexing-encoding method as recited in claim 16, wherein the step of selectively time-division multiplexing the plurality of video signals for providing the multiplexed video signal comprises the steps of:

receiving multiplex control data;

time-division multiplexing the plurality of video signals in accordance with the multiplex control data; and

converting the time-division multiplexed plurality of video signals to a digital video signal as the multiplexed video signal.

18. A video multiplexing-encoding method as recited in claim 16, wherein the step of selectively encoding the multiplexed video signal by combining the display control data therewith comprises the steps of:

receiving and storing the display control data;

receiving and storing the multiplexed video signal; and

converting the stored display control data and the stored multiplexed video signal to an analog, encoded, multiplexed video signal.

28. A video multiplexor-encoding method as recited in claim 16, wherein said display control data represents data selected from the group consisting of a position, a size and a relative visibility priority for each one of the plurality of corresponding video images within a display pattern of a plurality of video windows.

19. A video decoding-converting method for receiving, decoding and converting an encoded, time-division multiplexed video signal representing a plurality of video images for simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video decoding-converting method comprising the steps of:

receiving an encoded, time-division multiplexed video signal which includes display control data;

decoding the encoded, time-division multiplexed video signal by copying the display control data included therein; and

converting the encoded, time-division multiplexed video signal in selective accordance with the copied display control data to provide a unified video signal which represents the plurality of video images within the display pattern of the plurality of video windows.

20. A video decoding-converting method as recited in claim 19, wherein the step of decoding the encoded, time-division multiplexed video signal by copying the display control data included therein comprises copying the display control data in a computer.

21. A video decoding-converting method as recited in claim 19, wherein the step of converting the encoded, time-division multiplexed video signal in accordance with the copied display control data comprises the steps of:

generating a plurality of memory write addresses in selective accordance with the copied display control data;

storing the encoded, time-division multiplexed video signal in a memory; and

retrieving and outputting the stored encoded, time-division multiplexed video signal in accordance with the generated plurality of memory write addresses to provide a unified video display signal which represents the plurality of video images within the display pattern of the plurality of video windows.

22. A video decoding-converting method as recited in claim 21, wherein

the step of storing the encoded, time-division multiplexed video signal in a memory comprises the steps of:

receiving and storing the encoded, time-division multiplexed video signal as a first plurality of stored video data;

retrieving and re-storing the first plurality of stored video data as a second plurality of stored video data, stored in accordance with a generated plurality of memory write addresses; and

the step of retrieving and outputting comprises retrieving and outputting the second plurality of stored video data to provide the unified video display signal which represents the plurality of video images within the display pattern of the plurality of video windows.

23. A video decoding-converting method as recited in claim 21, further comprising the steps of:

inputting the video display signal as an address to a RAMDAC; and

outputting from the RAMDAC a selectively color-mapped, analog video signal which represents the plurality of video images within the display pattern of the plurality of video windows.

29. A video decoding-converting method as recited in claim 19, wherein said display control data represents data selected from the group consisting of a position, a size and a relative visibility priority for each one of the plurality of corresponding video images within a display pattern of a plurality of video windows.

25. A video multiplexor-encoder for receiving, time-division multiplexing and encoding a plurality of video signals representing a plurality of video images for transfer and simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video multiplexor-encoder comprising:

a video multiplexor for receiving multiplex control data and in accordance therewith receiving and time-division multiplexing a plurality of video signals which represent a plurality of corresponding video images;

an analog-to-digital converter coupled to the video multiplexor for receiving and converting the time-division multiplexed plurality of video signals to a digital multiplexed video signal;

memory means coupled to the analog-to-digital converter for receiving and storing the digital multiplexed video signal, and for receiving and storing display control data; and

a digital-to-analog converter coupled to the memory means for receiving and converting the stored display control data and the stored digital multiplexed video signal to an analog, encoded, multiplexed video signal.

27. A video decoder-converter for receiving, decoding and converting an encoded, time-division multiplexed video signal representing a plurality of video images for simultaneous display thereof in a pattern of a plurality of video windows on a video display device, the video decoder-converter comprising:

an analog-to-digital converter for receiving and converting an encoded, time-division multiplexed video signal which includes display control data to a digital, encoded multiplexed video signal;

computer means coupled to the analog-to-digital converter for receiving the digital, encoded multiplexed video signal and copying the digital control data included therein;

display memory means coupled to the analog-to-digital converter for receiving a plurality of memory write addresses and in accordance therewith receiving and storing the digital, encoded multiplexed video signal, and for retrieving and outputting the stored digital, encoded multiplexed video signal as a video display signal which represents the plurality of video images within the display pattern of the plurality of video windows; and

address generator means coupled to the computer means and the display memory means for receiving the copied display control data and in selective accordance therewith providing the plurality of memory write addresses.