Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2011-04-19
2011-04-19
Thomas, Joseph (Department: 2492)
Cryptography
Video cryptography
Video electric signal modification
C725S093000, C725S094000, C725S095000, C725S096000, C725S097000, C709S231000, C726S013000
Reexamination Certificate
active
07929696
ABSTRACT:
A digital television (DTV) signal converter consistent with certain embodiments has a satellite band receiver that receives satellite television broadcast data from a satellite service and demodulates the satellite television broadcast data into a digital data stream. The digital data stream contains television content, satellite television logical channel identification information and electronic program guide data, and wherein television content, the logical channel identification information and the electronic program guide data are associated with a set of logical channels provided on the satellite service. A data mapper maps the satellite television logical channel identification information in the data stream to DTV channel identification information. A quadrature amplitude modulation (QAM) modulator modulates the DTV channel identification information, the television content and the program guide data for transmission as an output comprising one or more QAM transport streams to a digital television. The data mapper further determines whether or not the satellite television logical channel will fit within one QAM transport stream, and assigns the satellite television logical channel to one or more QAM transport streams for transmission. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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Miller Jerry A.
Miller Patent Services
Pan Joseph
Sony Corporation
Sony Electronics Inc.
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