Systems for reducing adverse effects of deep fades in DTV signals designed for mobile reception

  • US 8,290,035 B2
  • Filed: 07/11/2008
  • Issued: 10/16/2012
  • Est. Priority Date: 07/11/2007
  • Status: Expired due to Fees
First Claim
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1. In transmitter apparatus for a digital television broadcast signal manifested as an electromagnetic wave subjected to vestigial sideband amplitude modulation in accordance with an eight-level modulating signal, said eight-level modulating signal formed by two-thirds trellis coding of convolutionally byte-interleaved 207-byte Reed-Solomon codewords generated from 187-byte packets beginning with respective 3-byte headers and concluding with respective 184-byte contents, the improvement wherein:

  • the contents of special ones of said 187-byte packets encapsulate respective segments of byte-interleaved parallel concatenated convolutional codewords;

    the headers of said special ones of said 187-byte packets indicate their special nature;

    said parallel concatenated convolutional codewords encode Reed-Solomon-coded ancillary data, time-division multiplexing bytes of said Reed-Solomon-coded ancillary data with bytes of a first parity determination and with bytes of a second parity determination; and

    the byte interleaving of said parallel concatenated convolutional codewords disposes the bytes of each of them transversally within the contents of said special ones of said 187-byte packets.

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