EEG - The Captioning Solutions Company

Closed Caption Bridges

Bridge the Gap: The EEG Closed Caption Bridge is a simple solution for merging closed captioning services from one video signal to another, and relocating caption displays to avoid emergency crawls.

Our award-winning CB512 is an HD Relocating Bridge / Legalizer that makes a real difference in your broadcast plant. It can bridge closed captioning data between a wide variety of HD formats (1080i, 720p, 24/23.98, 24/23.98p, 24/23.98psf) and provides an extremely efficient solution for debugging a wide variety of captioning problems.

For SD-only environments, look to the CB412 Captioning Bridge, with analog and SDI video inputs..

The HD 480 Smart Encoder V can also be used for live caption relocation, as well as providing secure IP delivery of real-time caption data, streaming program audio to a remote captioner and many other features.

 

Caption Offset

Vertical caption position in the Master Video output can be controlled via GPI inputs. This allows broadcasters the ability to re-position captions so they do not interfere with graphics or emergency alert crawls appearing at the top or bottom of the picture.

The active video screen is divided into 15 equal horizontal rows for caption relocation. The default behavior for the primary GPI switch, activated during the presence of an Emergency Message, is to automatically remap caption data to prevent overlay of the two bottom rows (14 and 15). No caption data is lost in this process and caption readability and timing is unaffected.

The secondary GPI input operates similarly except the default behavior is to remap captions to prevent overlay of the top two rows (1 and 2). The remapping functions of the GPI switches are programmable, and they can be used independently or in any combination as required.

Blocks of captioning, i.e. 3 and 4 row captions as well as horizontally and/or vertically split captions, will be processed to maintain their display integrity.

 

About Closed Caption Bridges

The Closed Caption Bridge extracts the HD VANC / SDLine 21 caption data from the Source Video Input signal and inserts it into the Master Video Output signal. The data present in both fields are processed simultaneously. A typical installation is shown in the figure below.