Interactive video distribution systems – User-requested video program system – Video-on-demand
Reexamination Certificate
2005-03-29
2005-03-29
Srivastava, Vivek (Department: 2611)
Interactive video distribution systems
User-requested video program system
Video-on-demand
C725S100000, C709S219000, C370S235000
Reexamination Certificate
active
06874161
ABSTRACT:
A method and apparatus for utilizing a high bandwidth communications channel for broadcasting network data during off-peak hours is disclosed. A demodulation unit includes, 1) a standard television broadcast signal receiver, the signal having a plurality of channels; 2) a partitioning unit configured to partition at least one channel of said plurality of channels into a plurality of variable size sub-channels; 3) a modulating unit configured to modulate a variety of different types of information into said plurality of sub-channels; and 4) a transmitter configured to transmit said plurality of sub-channels over a high bandwidth communications channel during off-peak hours.
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Perlman Stephen G.
Wasserman Steven
Srivastava Vivek
WebTV Networks Inc.
Workman Nydegger
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