Duplicating digital streams for digital conferencing using switching technologies
First Claim
1. A method of transmitting data units to participants of a conference using a switch, the method comprising:
- receiving, at the switch, a first data unit from a first conferencing participant, the first data unit addressed to the switch and including a payload portion;
forwarding, by the switch, the first data unit to at least a second conferencing participant and a third conferencing participant by;
generating a first and a second duplicated data unit by duplicating at least a portion of the payload portion of the first data unit and adding header information to reflect destination address information,wherein duplicating at least a portion of the payload portion of the second data unit includes;
identifying a portion of the payload portion that is not suitable for the third conferencing participant;
filtering the payload portion of the second data unit by removing the portion that is not suitable for the third conferencing participant;
duplicating a remaining portion of the payload portion of the second data unit for transmission to the third conferencing participant;
transmitting the first duplicated data unit to the second conferencing participant and transmitting the second duplicated data unit to the third conferencing participant;
receiving, at the switch, a second data unit from the second conferencing participant; and
forwarding, by the switch, the second data unit to at least the first conferencing participant and the third conferencing participant.
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Accused Products
Abstract
Using switching technologies to duplicate packets of a digital stream (e.g., digital video stream) sent from one workstation to multiple recipient workstations, where the switching technologies enable the multiple streams sent from the switch to the recipient workstations to be generated from a single digital stream sent from the sending workstation to the switch. Data units, such as video data units, may be transmitted by using a switch to enable receipt of a stream of data units including a payload portion and an attribute portion from at least two conferencing participants. The switch is used to duplicate at least a subportion of the payload portion of a data unit within the stream of data units, and to enable access to the duplicated subportion of the data unit by two or more conferencing participants.
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Citations
15 Claims
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1. A method of transmitting data units to participants of a conference using a switch, the method comprising:
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receiving, at the switch, a first data unit from a first conferencing participant, the first data unit addressed to the switch and including a payload portion; forwarding, by the switch, the first data unit to at least a second conferencing participant and a third conferencing participant by; generating a first and a second duplicated data unit by duplicating at least a portion of the payload portion of the first data unit and adding header information to reflect destination address information, wherein duplicating at least a portion of the payload portion of the second data unit includes; identifying a portion of the payload portion that is not suitable for the third conferencing participant; filtering the payload portion of the second data unit by removing the portion that is not suitable for the third conferencing participant; duplicating a remaining portion of the payload portion of the second data unit for transmission to the third conferencing participant; transmitting the first duplicated data unit to the second conferencing participant and transmitting the second duplicated data unit to the third conferencing participant; receiving, at the switch, a second data unit from the second conferencing participant; and forwarding, by the switch, the second data unit to at least the first conferencing participant and the third conferencing participant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification