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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2002 Free Software Foundation, Inc.
00004  *
00005  * This file is part of GNU Radio
00006  *
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  *
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022
00023 #ifndef _ATSC_CONSTS_H_
00024 #define _ATSC_CONSTS_H_
00025
00026 static const double ATSC_SYMBOL_RATE = 4.5e6 / 286 * 684;               // ~10.76 MHz
00027 static const double ATSC_DATA_SEGMENT_RATE = ATSC_SYMBOL_RATE / 832;    // ~12.935 kHz
00028
00029
00030 static const int ATSC_MPEG_DATA_LENGTH          = 187;
00031 static const int ATSC_MPEG_PKT_LENGTH           = 188;  // sync + data
00032 static const int ATSC_MPEG_RS_ENCODED_LENGTH    = 207;
00033 static const int ATSC_DATA_SEGMENT_LENGTH       = 832;  // includes 4 sync symbols at beginning
00034 static const int ATSC_DSEGS_PER_FIELD           = 312;  // regular data segs / field
00035
00036
00037 static const int MPEG_SYNC_BYTE = 0x47;
00038
00039 static const int MPEG_TRANSPORT_ERROR_BIT       = 0x80; // top bit of byte after SYNC
00040
00041
00042 #endif // _ATSC_CONSTS_H_