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Transmitter and repetition method thereof

  • US 10,389,390 B2
  • Filed: 11/04/2016
  • Issued: 08/20/2019
  • Est. Priority Date: 02/24/2015
  • Status: Active Grant
First Claim
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1. A television (TV) broadcast signal generating and transmitting apparatus which is operable based on a detail mode among a plurality of detail modes, the TV broadcast signal generating and transmitting apparatus comprising:

  • an encoder configured to encode information bits comprising input bits to generate parity bits based on a low density parity check (LDPC) code having a code length being 16200 bits, wherein the input bits are based on signaling information related to TV broadcast data;

    a repeater configured to, in case that the detail mode is a detail mode 1 among the plurality of detail modes, perform a repetition by determining a number of repetition bits based on a repetition parameter and a number of the input bits, selecting one or more parity bits from the generated parity bits based on the determined number, and appending the selected bits to the information bits;

    a puncturer configured to puncture one or more parity bits of the generated parity bits based on a puncturing parameter;

    a mapper configured to, in case that the detail mode is the detail mode 1, map the input bits, the appended parity bits and remaining parity bits of the generated parity bits after puncturing onto constellation points, wherein the constellation points are based on a quadrature phase shift keying (QPSK); and

    a transmitter configured to transmit a signal which is based on the constellation points,wherein, in case that the detail mode is a detail mode 3 among the plurality of detail modes, the repetition is skipped,wherein an LDPC code of the detail mode 1 is different from an LDPC code of the detail mode 3,wherein a puncturing parameter of the detail mode 1 is different from a puncturing parameter of the detail mode 3, andwherein a protection level of the signal is based on the detail mode.

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