Method for setting time stamp in syt field of packet headers for ieee-1394 devices
AssigneeApple Computer, Inc.
InventorERIK P. STAATS
Life of this patent
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Abstract
Isochronous data packets transmitted within a digital network having a bus architecture that complies with the IEEE-1394 Standard for a High Performance Serial Bus are stamped with a presentation time stamp value determined according to a computed packet rate for the data. For the case where the presentation time stamp field of a first packet of a second frame of data for transmission in the digital network is set with the presentation time value, the packet rate may be computed by measuring a difference between a desired presentation time value of a first packet in a first frame of the data and an actual transmission time of the first packet of the first frame. The first frame preceding the second frame in time of transmission within the network.
Claims5
A method comprising setting a presentation time stamp field of a first packet of a first frame of data for transmission in a digital network with a presentation time value determined according to a computed packet rate for the data.
A computer readable medium having stored thereon a plurality of sequences of instructions, said plurality of sequences of instructions including sequences of instructions which, when executed in a digital network including a plurality of nodes interconnected by a plurality of point-to-point links, cause one of said nodes to set a presentation time stamp field of a first packet of a first frame of data for transmission in the digital network with a presentation time value determined according to a computed packet rate for the data.
A method comprising setting a presentation time stamp field of a packet of data for transmission in a digital network with a presentation time value determined according to a computed packet rate for the data.
Dependencies are inferred from the claim text.