×

Synchronous play-out of media data packets

  • US 7,675,943 B2
  • Filed: 09/04/2003
  • Issued: 03/09/2010
  • Est. Priority Date: 09/06/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A media source, comprising:

  • a global clock determination unit configured to determine, once within a session, a global wallclock time having a first statistical variation;

    a sample clock determination unit configured to determine a sample clock time;

    a communications unit configured to send out, only once within the session, a control packet to one or more receiving media sinks, said control packet including two control packet timestamps, one of the control packet timestamps defining a moment in time in time units of said global wallclock time, another of the control packet timestamps defining the moment in time in time units of said sample clock time;

    a sending unit configured to send out time-stamped media data packets to the one or more receiving media sinks, each of the time-stamped media data packets including a timestamp that is a time of creation of the time-stamped media data packet;

    a determining unit configured to determine a play-out time offset based, in part, on the first statistical variation; and

    a transmission unit configured to send out the play-out time offset to said one or more receiving media sinks once for all time-stamped media data packets of the session.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×