Pulse or digital communications – Systems using alternating or pulsating current
Reexamination Certificate
2007-10-23
2007-10-23
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
C704S503000
Reexamination Certificate
active
10641360
ABSTRACT:
A broadcast system has digital receiving apparatuses that imitate deteriorated reproduction that is observed in analog receiving apparatuses when a transmission path failure occurs, thus preventing the audiences, who are accustomed to the analog broadcasting, from sensing discomfort at the digital broadcasting. A transmission apparatus causes encoding units11and12to generate low- and high-quality streams based on the same contents, and transmits these streams onto a transmission path while delaying the high-quality stream. In the receiving apparatuses, a reproduction unit25reproduces the high-quality stream in a normal state, while packets of the low-quality stream received during a time period T until the current time are accumulated in an accumulation unit22. If a transmission path failure occurs, a reproduction control unit26causes the reproduction unit25to reproduce, instead of the high-quality stream, the accumulated packets of the low-quality stream.
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Ghayour Mohammed
Torres Juan Alberto
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