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Video data compression method and system which measures compressed data storage time to optimize compression rate

  • US 5,563,961 A
  • Filed: 03/03/1994
  • Issued: 10/08/1996
  • Est. Priority Date: 03/03/1994
  • Status: Expired due to Term
First Claim
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1. A system for compressing and storing video data, including:

  • variable rate compression means for generating compressed video data by compressing input video data at a first compression rate selected from a range of compression rates in response to a control signal;

    a data storage device connected to the variable rate compression means, for storing the compressed video data; and

    control means, connected to the variable rate compression means and the data storage device, for measuring average throughput time for data transfer to and from the data storage device, selecting a desired compression rate in response to measured average throughput time, and generating the control signal so that said control signal sets the first compression rate to be said desired compression rate, wherein the data storage device is a disk storage device, and wherein the control means includes a processor programmed with software for sending a sequence of data words of varied length to the disk storage device and measuring time elapsed for each of said data words to be written onto a disk of the disk storage device and read back from said disk.

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