audioStreamFormat

Description

A stream is a combination of tracks (or one track) required to render a channel, object, HOA component or pack. The audioStreamFormat establishes a relationship between audioTrackFormats and the audioChannelFormats or audioPackFormat. Its main use is to deal with non-PCM encoded tracks, where one or more audioTrackFormats must be combined to represent a decodable signal that covers several audioChannelFormats (by referencing an audioPackFormat). For PCM audio, an audioStreamFormat will refer to a single audioTrackFormat and a single audioChannelFormat.

Example

<audioStreamFormat audioStreamFormatID="AS_00031001"
                   audioStreamFormatName="PCM_Dialogue1"
                   formatLabel="0001" formatDefinition="PCM">
  <audioChannelFormatIDRef>AC_00031001</audioChannelFormatIDRef>
  <audioTrackFormatIDRef>AT_00031001_01</audioTrackFormatIDRef>
</audioStreamFormat>

Attributes

Attribute	Description	Example	Required
audioStreamFormatName	Name of the stream	PCM_FrontLeft	Yes
audioStreamFormatID	ID for the stream. The yyyy digits of AS_yyyyxxxx represent the type of audio contained in the stream. The xxxx digits should match the audioChannelFormat xxxx digits.	AS_00010001	Yes
formatLabel	Descriptor of the format	0001	Optional
formatDefinition	Description of the format	PCM	Optional

* At least one of formatLabel or formatDefinition is required.

Sub-elements

Element	Description	Example	Quantity
audioChannelFormatIDRef	Reference to audioChannelFormat	AC_00010001	0 or 1
audioPackFormatIDRef	Reference to audioPackFormat	AP_00010003	0 or 1
audioTrackFormatIDRef	Reference to audioTrackFormat	AT_00010001_01	0…*

Only one of audioPackFormatIDRef or audioChannelFormatIDRef can be used, not both in the same element.