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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.
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When the primary GPI input (GPI A) is activated during the presence of an Emergency Message, caption data is automatically remapped to prevent overlay of video lines 212-239 (caption rows 14 and 15). No caption data is lost in this process and caption readability and timing is unaffected. |
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The secondary GPI input (GPI B) operates similarly except captions are remapped to prevent overlay of video lines 43-70 (caption rows 1 and 2). GPI A and B can be used independently in any combination as required. |
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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.
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.
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