8VSB DTV signals with PCCC and subsequent trellis coding
First Claim
1. A receiver for 8VSB digital television signals that convey robust data subjected to parallel concatenated convolutional coding (PCCC) before being further coded by 2/3 trellis coding of said 8VSB digital television signals, said receiver comprising:
- apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal, which apparatus includes front-end circuitry, an analog-to-digital converter, a demodulator for 8VSB digital television signals and a channel equalization filter;
a 12-phase trellis decoder connected for providing trellis decoding results that include soft decisions concerning symbols in said baseband digital television signal, said 12-phase trellis decoder connected to receive the baseband digital television signal from said apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal; and
further apparatus connected for decoding selected portions of said trellis decoding results conveying said PCCC that encodes said robust data, thus to reproduce said robust data.
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Accused Products
Abstract
Data to be more robustly transmitted within 8VSB broadcast DTV signals are turbo coded using parallel concatenated convolutional coding (PCCC) and incorporated within the segments of data fields, the bytes of which are convolutionally interleaved before trellis coding and 8VSB symbol mapping. Packing the PCCC into payload fields of MPEG-2-compatible null data packets and Reed-Solomon coding the packets to generate the segments of data fields, the bytes of which are convolutionally interleaved, conditions legacy DTV receivers to disregard PCCC components not useful to them. Transversal packing turbo-coded Reed-Solomon codewords into the payload fields of MPEG-2-compatible null data packets increases the capability of those turbo-coded Reed-Solomon codewords to overcome burst errors. Repeated transmissions of the transversally packed turbo-coded Reed-Solomon codewords in whole or in part allows them to overcome protracted deep fades encountered during mobile reception of 8VSB DTV signals.
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Citations
20 Claims
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1. A receiver for 8VSB digital television signals that convey robust data subjected to parallel concatenated convolutional coding (PCCC) before being further coded by 2/3 trellis coding of said 8VSB digital television signals, said receiver comprising:
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apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal, which apparatus includes front-end circuitry, an analog-to-digital converter, a demodulator for 8VSB digital television signals and a channel equalization filter; a 12-phase trellis decoder connected for providing trellis decoding results that include soft decisions concerning symbols in said baseband digital television signal, said 12-phase trellis decoder connected to receive the baseband digital television signal from said apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal; and further apparatus connected for decoding selected portions of said trellis decoding results conveying said PCCC that encodes said robust data, thus to reproduce said robust data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A receiver for 8VSB digital television signals that convey robust data subjected to parallel concatenated convolutional coding (PCCC) before being further coded by 2/3 trellis coding of said 8VSB digital television signals, said PCCC composed of first convolutional coding of said robust data and second convolutional coding of said robust data, bytes of said first convolutional coding and bytes of said second convolutional coding being time-interleaved with each other and with bytes of other data before being further coded by 2/3 trellis coding, said receiver comprising:
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apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal, which apparatus includes front-end circuitry, an analog-to-digital converter, a demodulator for 8VSB digital television signals and a channel equalization filter; a 12-phase trellis decoder connected for providing trellis decoding results that include soft decisions concerning symbols in said baseband digital television signal, said 12-phase trellis decoder connected to receive the baseband digital television signal from said apparatus for converting a selected 8VSB digital television signal received as an amplitude-modulated radio-frequency carrier to a baseband digital television signal; and further apparatus connected for decoding selected portions of said trellis decoding results conveying said PCCC composed of time-interleaved said first convolutional coding of said robust data and said second convolutional coding of said robust data, thus to reproduce said robust data. - View Dependent Claims (17, 18, 19, 20)
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Specification