| blob | 573398f347c8d38d2b4b7ad2d44ab8ce238058c6 |
2 #------------------------------------------------------------------------------
3 # $File: dolby,v 1.7 2014/01/08 22:37:23 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
9 0 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