Reception of ancillary 8VSB signals controlled responsive to information signaling version of broadcast standard being used
OwnerAllen LeRoy Limberginventor
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OwnerAllen LeRoy Limberginventor
Estimating the term…
Modifications to the system of broadcasting robustly coded ancillary transmissions to mobile and portable receivers of 8VSB digital television signals include version information as part of signal transmissions besides those made specifically to support an electronic service guide (ESG). This version information indicates what version of broadcast standard the signals complied with when transmitted. Such modifications allow such a receiver to determine whether it has the capability to process received ancillary transmissions usefully, without the receiver having to refer to an ESG derived from robustly coded ancillary transmissions that have been fully decoded. Such determination allows the receiver to avoid decoding of the robustly coded ancillary transmissions or to curtail such decoding after partial completion thereof, which reductions in decoding procedures reduce battery drain in battery-powered mobile and portable receivers. A receiver designed to respond to these modifications to the system of broadcasting is much less likely to malfunction owing to the ESG signal containing error when transmitted or accruing error owing to corruption during transmission.
Apparatus for transmitting digital data in 8VSB signal form, at least part of which digital data comprises M/H data coded for transmission in robust form for reception by mobile receivers or other portable receivers, said M/H data as so coded encapsulated within payload portions of MPEG-2-compliant packets referred to as MHE packets that are Reed-Solomon coded and convolutionally byte interleaved before being ⅔ trellis coded, each M/H Group in each M/H Frame including respective amounts of said M/H data accompanied by sequences of training signal and by header information in the form of a sequence of Transmission Parameter Channel (TPC) signaling and a sequence of Fast Information Channel (FIC) signaling, said apparatus for transmitting digital data in 8VSB signal form being combined with an improvement comprising:
Receiver apparatus for receiving digital data in 8VSB signal form, at least part of which digital data comprises M/H data coded for transmission in robust form for reception by mobile receivers or other portable receivers, said M/H data as so coded encapsulated within payload portions of MPEG-2-compliant packets referred to as MHE packets that are Reed-Solomon coded and convolutionally byte interleaved before being ⅔ trellis coded, each M/H Group in each M/H Frame including respective amounts of said coded M/H data accompanied by respective sequences of training signal and by a respective sequence of parallelly concatenated convolutionally coded (PCCC'd) Transmission Parameter Channel (TPC) signal and by a respective sequence of parallelly concatenated convolutionally coded (PCCC'd) Fast Information Channel (FIC) signal, the respective said sequence of TPC signal in each said M/H Group containing bits indicative of the TPC protocol -used in the version of the M/H broadcast standard used in transmitting that said sequence of TPC signal, said receiver apparatus comprising:
The combination comprising:
Dependencies are inferred from the claim text.