1 2#------------------------------------------------------------------------------ 3# $File: dolby,v 1.5 2009/09/19 16:28:08 christos Exp $ 4# ATSC A/53 aka AC-3 aka Dolby Digital <ashitaka@gmx.at> 5# from http://www.atsc.org/standards/a_52a.pdf 6# corrections, additions, etc. are always welcome! 7# 8# syncword 90 beshort 0x0b77 ATSC A/52 aka AC-3 aka Dolby Digital stream, 10# fscod 11>4 byte&0xc0 0x00 48 kHz, 12>4 byte&0xc0 0x40 44.1 kHz, 13>4 byte&0xc0 0x80 32 kHz, 14# is this one used for 96 kHz? 15>4 byte&0xc0 0xc0 reserved frequency, 16# 17>5 byte&7 = 0 \b, complete main (CM) 18>5 byte&7 = 1 \b, music and effects (ME) 19>5 byte&7 = 2 \b, visually impaired (VI) 20>5 byte&7 = 3 \b, hearing impaired (HI) 21>5 byte&7 = 4 \b, dialogue (D) 22>5 byte&7 = 5 \b, commentary (C) 23>5 byte&7 = 6 \b, emergency (E) 24# acmod 25>6 byte&0xe0 0x00 1+1 front, 26>6 byte&0xe0 0x20 1 front/0 rear, 27>6 byte&0xe0 0x40 2 front/0 rear, 28>6 byte&0xe0 0x60 3 front/0 rear, 29>6 byte&0xe0 0x80 2 front/1 rear, 30>6 byte&0xe0 0xa0 3 front/1 rear, 31>6 byte&0xe0 0xc0 2 front/2 rear, 32>6 byte&0xe0 0xe0 3 front/2 rear, 33# lfeon (these may be incorrect) 34>7 byte&0x40 0x00 LFE off, 35>7 byte&0x40 0x40 LFE on, 36# 37>4 byte&0x3e = 0x00 \b, 32 kbit/s 38>4 byte&0x3e = 0x02 \b, 40 kbit/s 39>4 byte&0x3e = 0x04 \b, 48 kbit/s 40>4 byte&0x3e = 0x06 \b, 56 kbit/s 41>4 byte&0x3e = 0x08 \b, 64 kbit/s 42>4 byte&0x3e = 0x0a \b, 80 kbit/s 43>4 byte&0x3e = 0x0c \b, 96 kbit/s 44>4 byte&0x3e = 0x0e \b, 112 kbit/s 45>4 byte&0x3e = 0x10 \b, 128 kbit/s 46>4 byte&0x3e = 0x12 \b, 160 kbit/s 47>4 byte&0x3e = 0x14 \b, 192 kbit/s 48>4 byte&0x3e = 0x16 \b, 224 kbit/s 49>4 byte&0x3e = 0x18 \b, 256 kbit/s 50>4 byte&0x3e = 0x1a \b, 320 kbit/s 51>4 byte&0x3e = 0x1c \b, 384 kbit/s 52>4 byte&0x3e = 0x1e \b, 448 kbit/s 53>4 byte&0x3e = 0x20 \b, 512 kbit/s 54>4 byte&0x3e = 0x22 \b, 576 kbit/s 55>4 byte&0x3e = 0x24 \b, 640 kbit/s 56# dsurmod (these may be incorrect) 57>6 beshort&0x0180 0x0000 Dolby Surround not indicated 58>6 beshort&0x0180 0x0080 not Dolby Surround encoded 59>6 beshort&0x0180 0x0100 Dolby Surround encoded 60>6 beshort&0x0180 0x0180 reserved Dolby Surround mode 61