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12.0 XF-AVC PROXY – LOW DATA RATE FOR OFFLINE EDITING
To support offline editing of any of the above HD / 2K / UHD / 4K formats, the C700 separately
records a low data rate proxy of the format in question. This is an HD or 2K format that is
coded as YCrCb 4:2:0 in Long GOP form at 8-bit at frame rates up to 59.94P. While the primary
program signal format is being recorded to the CFast memory cards this proxy is recorded in
parallel to a separate SD memory card. As shown in Table 7, the recording data rate varies
from 24 Mbps to 35 Mbps depending upon the frame rate.
TABLE 7 Highly efficient Proxy Recording of YCrCb 4:2:0
13.0 SLOW AND FAST MOTION RECORDING
The EOS C700 can be set to shoot and capture at a wide range of frame rates. Depending
upon the choice of recording frame rate and the separate choice of the playback frame rate the
EOS C700 can implent either Fast Motion playback (over quite a broad range) or alternatively
Slow Motion Playback (over a more modest range) .
Table 8 outlines all of the choices when the camcorder is operating in either the 4K / UHD and
the 2K / HD mode. The left hand column identifies the desired playback frame rate and the
two adjoining columns identify the digital production format that has been selected. The
righthand column then identifies the various frame rates that can be chosen for the actual
shooting – depending on whether fast or slow motion effects are sought.
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