Blackmagicdesign H.264 Pro Recorder Operation Manual page 18

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18
HDMI and SDI — Digital Video is the Best!
HDMI and SDI are digital protocols which provide the highest quality video to H.264 Pro Recorder.
A single cable is used to transmit all of the color and audio information.
If you have a choice of using analog or digital connections, always choose digital for the best quality video
and audio.
HDMI provides the same uncompressed, digital quality as high-end SDI digital video but at a much lower
cost. It is designed to be used over short distances and standard cables are typically only 6 feet or 2 meters
in length. HDMI is often found on consumer equipment as well as on some professional equipment.
The HDMI cable can be directly connected to the HDMI port on H.264 Pro Recorder.
SDI and HD-SDI provide industrial grade connections for uncompressed, digital video. SDI cables support
transmission of uncompressed digital video over at least 300 feet or 100 meters. SDI and HD-SDI connections
are found on high-end broadcast and professional video hardware. An SDI or HD-SDI cable can be directly
connected the SDI / HD-SDI port on H.264 Pro Recorder.
How Does H.264 Pro Recorder Know Which Input Connections to Use?
H.264 Pro Recorder auto-detects the video input you wish to use, i.e. SDI, HDMI, component, S-Video or
composite analog video. For this reason, only connect one video source to H.264 Pro Recorder so it can
auto-detect which source to use. If you are using analog video, you can also connect analog audio at the
same time as expected. The RS-422 remote connection does not affect video input auto-detection.