AudioChannelConfiguration descriptor
The channel configuration for a Dolby Digital
Plus stream is specified in the AudioChannelConfiguration
descriptor.
For Dolby Digital
Plus bitstreams, the
AudioChannelConfiguration
descriptor uses the
AudioChannelConfiguration
scheme described in
the schemeIdUri:
tag:dolby.com,2014:dash:audio_channel_configuration:2011
.
For a Dolby Digital Plus bitstream that carries Dolby Atmos content, this descriptor describes the channel configuration of the backward-compatible channel coding of the presentation.
The value
element contains
a four-digit hexadecimal representation of the 16-bit bit field, which describes the channel
assignment of the referenced Dolby Digital
Plus bitstream
according to the table.
Bit | Location |
---|---|
0 (most-significant bit) | L |
1 | C |
2 | R |
3 | Ls |
4 | Rs |
5 | Lc/Rc pair |
6 | Lrs/Rrs pair |
7 | Cs |
8 | Ts |
9 | Lsd/Rsd pair |
10 | Lw/Rw pair |
11 | Lvh/Rvh pair |
12 | Cvh |
13 | Lts/Rts pair |
14 | LFE2 |
15 | LFE |
Bit 0, which indicates the presence of the L channel, is the most-significant bit of the
AudioChannelConfiguration
descriptor. For example, to indicate that the channel
configuration of the Dolby Digital
Plus bitstream is L, C, R, Ls, Rs, LFE, the
value
element must contain the value F801
(the hexadecimal
equivalent of the binary value 1111 1000 0000 0001).