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Video compression and decompression arrangement having reconfigurable camera and low-bandwidth transmission capability

  • US 5,926,208 A
  • Filed: 09/06/1996
  • Issued: 07/20/1999
  • Est. Priority Date: 02/19/1992
  • Status: Expired due to Term
First Claim
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1. A video-conferencing system, comprising:

  • a source computer station including a device-communication circuit;

    a memory device including data corresponding to a computer-executable video-data-compression program;

    a data transfer circuit configured and arranged to carry the data corresponding to the computer-executable video-data-compression program from the memory device;

    a reconfigurable video-signal camera device havinga first type of memory storing a plurality of computer-executable video-data-compression subprograms usable in compressing video-data,a second type of memory,a download circuit including receiver interface circuitry configured to receive the transmitted data corresponding to the computer-executable video-data-compression program and to store the transmitted data in the second memory,an image reader including a data generation circuit which captures an external image and generates data representing the image,a processor circuit, including a programmable RISC-type processor and a programmable DSP-type processor communicatively coupled to the programmable RISC-type processor, configured and arranged to execute the data corresponding to the computer-executable video-data compression program and the selected ones of the stored subprograms and to generate compressed data representing the external image, anda data transmission circuit, responsive to the processor means, for transmitting the compressed data from the reconfigurable video-signal camera device; and

    an interface link communicatively coupled between the data transmission circuit and the device-communication circuit of the source computer station and arranged to carry the compressed data from the data transmission circuit; and

    a video-destination arrangement configured and arranged to be communicatively coupled to receive the compressed data and to decompress the compressed data using a video-data-decompression program that is compatible with the computer-executable video-data-compression program transmitted to the reconfigurable video-signal camera device.

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