You can use Alta 2110's Selective 6101 Embedding feature to only send 6101 packets in 2110-40 when your Alta is actively captioning your broadcasts through LEXI or by human captioners through iCap. This document describes the prerequisites and steps needed for using the Selective 6101 Embedding feature.

This feature is most useful to Alta 2110 users whose downstream workflow does not tolerate receiving 6101 data during times when captioning is not active.

Applicability

Selective 6101 embedding is available for all Alta ST 2110 encoders with system version v3.09 and Alta 2110 REST API version 3.54.0 or higher.

Before You Begin

Before activating selective 6101 embedding, fully configure your Alta system, including network access.

Configuration

To activate selective 6101 embedding on a new or existing Alta device:

1.  Navigate to Other Settings on the device configuration window.
2. Select Selective 6101 Embedding.
3. Click Create Device (new devices) or Save Settings (existing devices).

When selected, the system includes 6101 captioning packets in the 2110-40 VANC output packets when the Alta encoder is actively captioning, through LEXI or by a human captioner through iCap.

When not selected (the default), the system conforms to industry-standard behavior and includes 6101 captioning packets on every 2110-40 VANC output packet, regardless of active captioning.

HTTP API Trigger

To prevent unexpected service interruptions, before following the steps in this section, see the API documentation hosted on your Alta system for more information about using the API.

HTTP API Trigger Behavior

You can use the turn_on_6101 and turn_off_6101 API triggers to further control inclusion of 6101 in the 2110-40 VANC output packets. After sending a turn_off_6101 trigger, the system does not include 6101 packets in the 2110-40 output. Use the turn_on_6101 trigger to reactivate 6101. 

If you enable selective 6101 embedding with no active captioning, turn_on_6101 has no effect. When captions return, selective 6101 embedding returns as well.

HTTP API Trigger Requests

The API posts turn_on_6101 and turn_off_6101 requests to the trigger_preset endpoint at http://<Alta IP>/alta/alta_instances/<channel_id>/trigger_preset where <Alta IP> is the IP address of your Alta system and <channel_ID> is the ID of the channel you are using.

Sample turn_off_6101 Request

POST http://192.168.2.31/alta/alta_instances/EEG_BR_VQDPMW65RVICE4TX/trigger_preset
{
"type" : "cc_encoder",
"function" : "turn_off_6101"
}
If success, returns
{
"success": true
}
If failure, returns
{
"msg": "Channel is not running",
"success": false
}

In this sample, the msg statement contains the relevant error message.

When you send a successful post message via the API trigger preset, the output includes "success": true and a 200 OK message displays.

{
       "success": true
}

Sample turn_on_6101 Request

POST http://192.168.2.31/alta/alta_instances/EEG_BR_VQDPMW65RVICE4TX/trigger_preset
{
"type" : "cc_encoder",
"function" : "turn_on_6101"
}

Behavior Information

The following summarizes the captioning behaviors with selective 6101 embedding enabled and disabled.

Note: The information in Behavior Description and the Behavior Matrix is the same, but presented it in two formats to help with your workflow and planning needs.

Behavior Description

Selective 6101 Enabled

• no active captions = No 6101 output
  • turn_off_captions trigger, no active captions = No 6101 output
  • turn_on_captions trigger, no active captions = No 6101 output
• active captions = 6101 output present
  • turn_off_captions trigger, active captions = No 6101 output
  • turn_on_captions trigger, active captions = 6101 output present

Selective 6101 Disabled (Default)

• no active captions = 6101 output present
  • turn_off_captions trigger, no active captions = No 6101 output
  • turn_on_captions trigger, no active captions = 6101 output present
• active captions = 6101 output present
  • turn_off_captions trigger, active captions = No 6101 output
  • turn_on_captions trigger, active captions = 6101 output present

Behavior Matrix