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Data buffering system including buffer memory shared between channel data groups whereas buffer memory is divided into memory areas for storing different types of channel data groups

  • US 5,941,961 A
  • Filed: 08/13/1997
  • Issued: 08/24/1999
  • Est. Priority Date: 08/16/1996
  • Status: Expired due to Fees
First Claim
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1. A data buffering apparatus for temporarily storing a plurality of channel data groups each having a plurality of channel data components representative of pieces of data information and a coupling channel data group having a coupling data component representative of one of said pieces of data information shared between at least two of said plurality of channel data groups and at least one control data component representative of a piece of control data information used for said coupling data component, comprising:

  • a data input port for successively receiving said plurality of channel data groups and said coupling data group;

    a buffer memory havinga first memory area assigned to one of said plurality of channel data groups without said coupling data component,a second memory area assigned to another of said plurality of channel data groups having channel data components selected from said plurality of channel data components in such a manner as to delete said coupling data component from said plurality of channel data components, anda third memory area assigned to said coupling data group; and

    a data controlling means connected between said data input port and said buffer memory, checking each of said plurality of channel data groups to see whether or not said coupling data component is incorporated therein so as to write said each of said plurality of channel data group into one of said first memory area and said second memory area, and writing said coupling data group into said third memory area,said data controlling means overwriting yet another of said plurality of channel data groups into said first area already stored said one of said plurality of channel data groups when said yet another of said plurality of channel data groups does not contain said coupling data component,said data controlling means overwriting still another of said plurality of channel data groups into said second memory area already stored said another of said plurality of channel data groups when said still another of said plurality of channel data groups contains said coupling data component.

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