Interactive video distribution systems – User-requested video program system – Video-on-demand
Reexamination Certificate
2001-04-30
2009-12-01
Shang, Annan Q (Department: 2424)
Interactive video distribution systems
User-requested video program system
Video-on-demand
C725S114000, C725S138000, C709S203000, C370S401000
Reexamination Certificate
active
07627887
ABSTRACT:
An apparatus in a digital network receives digital packets, such as MPEG packets, included in at least one input transport stream and outputs a plurality of modulated output transport streams. The apparatus determines whether the input transport streams include packets that are for multicasting from a plurality of the modulators included within the apparatus. The apparatus also determines whether the input transport streams include unicast packets that are transmitted from only one of the output modulators of the apparatus. The apparatus identifies the unicast and multicast packets of the input transport streams and associates a modulator for each unicast packet. The associated modulator of a unicast packet is the particular modulator from which the packet is modulated and transmitted. The apparatus also associates a plurality of modulators with each multicast packet, wherein the associated plurality of modulators are the modulators from which the multicast packet is transmitted.
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Bisher, Jr. James A.
Buchen Neil B.
Wilson Thomas C.
Scientific - Atlanta, Inc.
Shang Annan Q
Tarolli, Sundheim Covell & Tummino LLP
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