Dolby E input audio in MediaLive

You can set up AWS Elemental MediaLive to ingest Dolby E audio. The Dolby E audio must be wrapped in a PCM streams tagged with SMPTE-337. The options for handling this audio source are the following:

• Extract individual programs from the source audio, and then convert it or remix it in the output.

• Pass them through all the programs, with no conversion and no remixing.

• Set up the source for both types of handling—to extract programs and to pass through the entire source.

About Dolby E

Dolby E wrapped in PCM can carry up to eight Dolby E programs delivered in two audio tracks. The two audio tracks are a standard stereo pair (in other words, 2.0 coding mode).

The two tracks contain the number of Dolby E programs required for the coding mode of the audio. For example, if the audio is 7.1 audio, then all the Dolby E programs contains content. If the audio is four stereo languages, then all the Dolby E programs contain content. But if the audio is only three stereo languages, then only six of the Dolby E programs contain content.

The supported coding modes for Dolby E audio are AD, 1.0 (mono), 1.1, 2.0 (stereo), 3.2, 4.0, 5.1, and 7.1. All these coding modes are supported by MediaLive on the input side.

For information about the input types that support Dolby E, see Supported codecs for inputs.

Getting ready

Contact the content provider for this input to find out about the programs that are included in the Dolby E audio. For example, it might contain 7.1 audio in English. Or it might contain four sets of stereo (English, French, Spanish, Punjabi) with English in Dolby E programs 1 and 2, and so on, through to Punjabi in Dolby E programs 7 and 8.

Setting up the input to extract programs

You must identify each Dolby E program that you want to extract and map it to a MediaLive audio selector. Each MediaLive audio selector maps to one Dolby E program.

Note

The information in this section assumes that you are familiar with the general steps for creating a channel.

1. In the channel in MediaLive, select the Input attachment that contains the Dolby E audio that you want to decode or pass through.

2. In the General input settings section choose Add audio selectors. Fields for one audio selector (Audio Selectors 1) appear.

3. Complete the fields as follows.

   Field	Description
   Audio selector name	Assign a name to the Dolby E program. For example, DolbyE program1.
   Selector settings	From the drop-down menu, choose Audio track selection.
   Dolby E decode	Choose Audio Dolby E decode. The Dolby E program selection field appears. The drop-down menu shows the eight possible Dolby E programs.
   Dolby E program selection	Select the Dolby E program that you want to extract. For example, PROGRAM_1.

   Don't select the Add tracks field. This field doesn't apply to Dolby E audio.

4. To extract more Dolby E programs, choose Add audio selectors as many times as you need. Follow the steps above for each Dolby E program that you want to extract.

When you have finished, there will be one audio selector for each program to extract.

Setting up the input to pass through the audio

You can pass through the entire Dolby E audio source so that you can then pass it through in the output.

Note

The information in this section assumes that you are familiar with the general steps for creating a channel.

1. In the channel in MediaLive, select the Input attachment that contains the Dolby E audio that you want to decode or pass through.

2. In the General input settings section choose Add audio selectors. Fields for one audio selector (Audio Selectors 1) appear.

3. Complete the fields as follows.

   Field	Description
   Audio selector name	Assign a name to the Dolby E program. For example, DolbyE passthrough.
   Selector settings	From the drop-down menu, choose Audio track selection.
   Dolby E decode	Choose Audio Dolby E decode. The Dolby E program selection field appears. The drop-down menu shows the eight possible Dolby E programs.
   Dolby E program selection	Select the Dolby E program that you want to extract. For example, ALL_CHANNELS.

Setting up the input to extract and pass through

You can set up the source in both ways—to extract programs and to pass through the entire source.

In the same input attachment, set up one selector for passthrough, and set up several selectors to extract programs.