1 2#------------------------------------------------------------------------------ 3# $File: dolby,v 1.9 2019/04/19 00:42:27 christos Exp $ 4# ATSC A/53 aka AC-3 aka Dolby Digital <ashitaka@gmx.at> 5# from https://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# Proposed audio/ac3 RFC/4184 11!:mime audio/vnd.dolby.dd-raw 12# fscod 13>4 byte&0xc0 = 0x00 48 kHz, 14>4 byte&0xc0 = 0x40 44.1 kHz, 15>4 byte&0xc0 = 0x80 32 kHz, 16# is this one used for 96 kHz? 17>4 byte&0xc0 = 0xc0 reserved frequency, 18# 19>5 byte&0x07 = 0x00 \b, complete main (CM) 20>5 byte&0x07 = 0x01 \b, music and effects (ME) 21>5 byte&0x07 = 0x02 \b, visually impaired (VI) 22>5 byte&0x07 = 0x03 \b, hearing impaired (HI) 23>5 byte&0x07 = 0x04 \b, dialogue (D) 24>5 byte&0x07 = 0x05 \b, commentary (C) 25>5 byte&0x07 = 0x06 \b, emergency (E) 26>5 beshort&0x07e0 0x0720 \b, voiceover (VO) 27>5 beshort&0x07e0 >0x0720 \b, karaoke 28# acmod 29>6 byte&0xe0 = 0x00 1+1 front, 30>>6 byte&0x10 = 0x10 LFE on, 31>6 byte&0xe0 = 0x20 1 front/0 rear, 32>>6 byte&0x10 = 0x10 LFE on, 33>6 byte&0xe0 = 0x40 2 front/0 rear, 34# dsurmod (for stereo only) 35>>6 byte&0x18 = 0x00 Dolby Surround not indicated 36>>6 byte&0x18 = 0x08 not Dolby Surround encoded 37>>6 byte&0x18 = 0x10 Dolby Surround encoded 38>>6 byte&0x18 = 0x18 reserved Dolby Surround mode 39>>6 byte&0x04 = 0x04 LFE on, 40>6 byte&0xe0 = 0x60 3 front/0 rear, 41>>6 byte&0x04 = 0x04 LFE on, 42>6 byte&0xe0 = 0x80 2 front/1 rear, 43>>6 byte&0x04 = 0x04 LFE on, 44>6 byte&0xe0 = 0xa0 3 front/1 rear, 45>>6 byte&0x01 = 0x01 LFE on, 46>6 byte&0xe0 = 0xc0 2 front/2 rear, 47>>6 byte&0x04 = 0x04 LFE on, 48>6 byte&0xe0 = 0xe0 3 front/2 rear, 49>>6 byte&0x01 = 0x01 LFE on, 50# 51>4 byte&0x3e = 0x00 \b, 32 kbit/s 52>4 byte&0x3e = 0x02 \b, 40 kbit/s 53>4 byte&0x3e = 0x04 \b, 48 kbit/s 54>4 byte&0x3e = 0x06 \b, 56 kbit/s 55>4 byte&0x3e = 0x08 \b, 64 kbit/s 56>4 byte&0x3e = 0x0a \b, 80 kbit/s 57>4 byte&0x3e = 0x0c \b, 96 kbit/s 58>4 byte&0x3e = 0x0e \b, 112 kbit/s 59>4 byte&0x3e = 0x10 \b, 128 kbit/s 60>4 byte&0x3e = 0x12 \b, 160 kbit/s 61>4 byte&0x3e = 0x14 \b, 192 kbit/s 62>4 byte&0x3e = 0x16 \b, 224 kbit/s 63>4 byte&0x3e = 0x18 \b, 256 kbit/s 64>4 byte&0x3e = 0x1a \b, 320 kbit/s 65>4 byte&0x3e = 0x1c \b, 384 kbit/s 66>4 byte&0x3e = 0x1e \b, 448 kbit/s 67>4 byte&0x3e = 0x20 \b, 512 kbit/s 68>4 byte&0x3e = 0x22 \b, 576 kbit/s 69>4 byte&0x3e = 0x24 \b, 640 kbit/s 70