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Picture distribution system and method thereof

  • US 7,400,592 B1
  • Filed: 07/20/2000
  • Issued: 07/15/2008
  • Est. Priority Date: 09/17/1999
  • Status: Expired due to Fees
First Claim
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1. A picture distribution system for distributing picture data from one or more sources to a plurality of receiving devices using a distribution device, the system comprising:

  • a network where a plurality of logical channels are established in a time division multiplex method;

    the distribution device distributing picture data from the one or more sources to the plurality of receiving devices via a logical channel designated by a distribution instruction;

    the plurality of receiving devices receiving picture data from respective logical channels designated by receiving instructions; and

    an allocation unit allocating respective bandwidth to each of a plurality of logical channels used to transmit picture data according to a number of sources for picture data to be transmitted via the plurality of logical channels, whereinsaid allocation unit allocates a predetermined first bandwidth to each of the logical channels when the number of sources for picture data to be transmitted via the plurality of logical channels does not exceed a predetermined threshold number, and when the number of sources for picture data to be transmitted via the plurality of logical channels exceeds the threshold number by having a new source added thereto, said allocation unita) selects one of the plurality of logical channels, on which picture data from a corresponding source has been transmitted, to which the first bandwidth has been allocated,b) generates new logical channels each having a second bandwidth, which is obtained by dividing the first bandwidth of the selected logical channel by a predetermined integer, andc) allocates one of the new logical channels to the corresponding source and the other of the new logical channels to the new source.

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