HD491 Smart Encoder
Copyright © 2000-2014 EEG Enterprises, Inc. 18
All Rights Reserved.
In HD491 Versions 1.19 and above, you can use the Web Terminal
interchangeably with the serial port interface. Instead of entering
<CTRL+A> at the beginning of commands, use ‘@’.
In this manual, Encoder commands will be distinguished from other text
by use of a bold font. The parameters for each command will be listed in
italics. Optional parameters will be listed within square brackets.
To check the operation of your communications setup, try typing
<CTRL+A>?<ENTER>
. If your setup is working correctly, the Encoder
will respond with its model name, firmware version, and serial number.
Local Entry Modes
Caption data entered into the Encoder must be associated with a particular
Line 21 Data Channel, NTSC field, or HD caption Service. The table
below identifies the commonly used NTSC (SD) Line 21 data channels.
Data
Channel
Description
CC1
Primary language Closed Captioning in
Field 1
CC2
Secondary language Closed Captioning
in Field 1
CC3
Secondary language Closed Captioning
in Field 2
T1, T2
Field 1 Text services, including
Interactive TV URLs
XDS
Extended Data Services such as
Program Rating, Type and Length.
Appears in Field 2.
In HD captioning, Services are designated instead of Channels. Service
1 is assigned for primary language captioning, and Service 2 is assigned
for secondary language captioning. When 608 data is up-converted to
create 708 data, CC1 data is assigned to Service 1, and CC3 data is
assigned to Service 2. Text and XDS data is preserved in 608 down-
compatibility bytes, but is not up-converted.
The Local Entry Modes described in this section are used for local
insertion of data into caption channels only; see the next two sections of
the manual for modes to insert Text or XDS data.
Regeneration
Mode
