Signaling Dolby Digital Plus bitstreams in an ISO base media file
The basic structures defined within ISO/IEC 14496-12 to identify audio tracks are used with specific extensions (defined in Annex F of ETSI TS 102 366) to provide detailed information on the characteristics of a Dolby Digital Plus stream.
The information is included in the stbl
box of the moov
box
of the ISO base media file. The locations and hierarchy of the boxes that must be included in
stbl
to identify a Dolby Digital
Plus stream within an ISO base media
file are listed in the table.
Nesting Level | ||||
---|---|---|---|---|
4 | 5 | 6 | 7 | Reference |
stbl
|
ISO/IEC 14496-12 | |||
stsd
|
||||
(header type set to |
Annex F of ETSI TS 102 366 | |||
(header type set to |
Annex F of ETSI TS 102 366 and Deriving the contents of the EC3Specific box section of this information set | |||
stts
|
ISO/IEC 14496-12 | |||
stsc
|
||||
stsz
|
||||
stz2
|
||||
stco
|
||||
co64
|
In the table, the value of the nesting level provided for each box is based on the structure of
the complete ISO base media file, beginning with a nesting value of 0
for the
ftyp
and moov
boxes. The table also includes a reference to
where each box is defined.
For an unencrypted ISO base media file, the EC3SampleEntry
box header type
value is ec-3
. The value of the EC3SpecificBox
header type is
dec3
.