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BrightEye 72 - Page 6
3G/HD/SD SDI to HDMI Converter User Guide
TM
BrightEye 72
Closed Caption Decoding
The BrightEye 72 has a caption reader in the video path that decodes caption data. After being
decoded, a character generator system in the BrightEye 72 overlays the captions onto the video
which is then sent through the HDMI output to be displayed on screen. This is useful for compliance
monitoring to be sure that all the captions are present in the broadcast signal.
The CEA-608 and CEA-708 standards for closed captions are specific to NTSC-based television systems.
Accordingly, they are supported for these input signals:
Standard Definition 525/59.94
High Definition 1080i/59.94
High Definition 720p/59.94
Under U.S. federal law, all consumer television receivers above a certain display size sold in the U.S.
must include decoding and display of closed caption data. However, that requirement is only for
over the air (or cable) broadcast signals received through the tuner input. The HDMI input of these
displays is not required to support closed captions. In fact, the HDMI standard provides no support for
captions in ‘closed’ form. BrightEye 72 is able to deliver open captions to an HDMI display by rendering
them as actual image content with its built-in character generator.
Timecode Reader
The video path includes a timecode reader. BrightEye 72 can read and
display running timecode from either DVITC (Digital Vertical Interval
Time Code) on SD SDI inputs, or ATC (Ancillary Time Code) on
HD SDI inputs.
Timecode display
