1 /* -*- c++ -*- */ 2 /* 3 * Copyright 2014 Free Software Foundation, Inc. 4 * 5 * This file is part of GNU Radio 6 * 7 * GNU Radio is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 3, or (at your option) 10 * any later version. 11 * 12 * GNU Radio is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with GNU Radio; see the file COPYING. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef INCLUDED_DTV_ATSC_CONSTS_H 24 #define INCLUDED_DTV_ATSC_CONSTS_H 25 26 #include <gnuradio/dtv/api.h> 27 28 namespace gr { 29 namespace dtv { 30 31 // These will go into an mpeg_consts.h once other mod/demods are done 32 static const int ATSC_MPEG_DATA_LENGTH = 187; 33 static const int ATSC_MPEG_PKT_LENGTH = 188; // sync + data 34 static const int ATSC_MPEG_RS_ENCODED_LENGTH = 207; 35 static const int MPEG_SYNC_BYTE = 0x47; 36 static const int MPEG_TRANSPORT_ERROR_BIT = 0x80; // top bit of byte after SYNC 37 38 // ATSC specific constants 39 static const double ATSC_SYMBOL_RATE = 4.5e6 / 286 * 684; // ~10.76 MHz 40 static const double ATSC_DATA_SEGMENT_RATE = ATSC_SYMBOL_RATE / 832; // ~12.935 kHz 41 static const int ATSC_DATA_SEGMENT_LENGTH = 832; // includes 4 sync symbols at beginning 42 static const int ATSC_DSEGS_PER_FIELD = 312; // regular data segs / field 43 44 } /* namespace dtv */ 45 } /* namespace gr */ 46 47 #endif /* INCLUDED_DTV_ATSC_CONSTS_H */ 48