catv_trellis_enc_bb.h

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/* -*- c++ -*- */
/*
 * Copyright 2016,2017 Free Software Foundation, Inc.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */
 
#ifndef INCLUDED_DTV_CATV_TRELLIS_ENC_BB_H
#define INCLUDED_DTV_CATV_TRELLIS_ENC_BB_H
 
#include <gnuradio/block.h>
#include <gnuradio/dtv/api.h>
#include <gnuradio/dtv/catv_config.h>
 
namespace gr {
namespace dtv {
 
/*!
 * \brief Trellis Encoder. 14/15 (64QAM) or 19/20 (256QAM) code rate.
 * \ingroup dtv
 *
 * Input: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit
 * symbols with 42-bit (64QAM) or 40-bit (256QAM) FSYNC word.\n Output: Four 7-bit symbols
 * (28 bits) Trellis encoded to 30 bits (64QAM, 14/15 code rate) or 38 data bits Trellis
 * encoded to 40 bits (256QAM, 19/20 code rate).
 */
class DTV_API catv_trellis_enc_bb : virtual public gr::block
{
public:
    typedef std::shared_ptr<catv_trellis_enc_bb> sptr;
 
    /*!
     * \brief Create an ITU-T J.83B Trellis Encoder.
     *
     * \param constellation 64QAM or 256QAM constellation.
     */
    static sptr make(catv_constellation_t constellation);
};
 
} // namespace dtv
} // namespace gr
 
#endif /* INCLUDED_DTV_CATV_TRELLIS_ENC_BB_H */