Canon EOS C300 Mark II PL 手册
7.0
120 FPS Operation of 2K / HD
When the C300 Mark II is originating in 2K or HD it can record picture capture rates from 1 fps
up to a maximum of 120 fps progressive. To do this, however, the data rate of the video
components emanating from the image sensor system must be constrained so that the
processing and recording can retain a high integrity. The expedient to accomplish this
curtailment of maximum data rate is to center crop the image sensor readout. Thus, instead of
the usual four frames of 2048 x 1080 digital samples – this now becomes four frames of 1024 x
540 (approximately one megapixel frames each). These frames are then subject to the
upsampling process – shown in Figure 4 – where they are converted to three RGB frames of
2018 x 1080 digital samples. They are then processed in the same manner as the 2K / HD
frames for the normal operation of the camera and delivered to the recording codec as YCrCb
4:2:2 at 120 fps.
up to a maximum of 120 fps progressive. To do this, however, the data rate of the video
components emanating from the image sensor system must be constrained so that the
processing and recording can retain a high integrity. The expedient to accomplish this
curtailment of maximum data rate is to center crop the image sensor readout. Thus, instead of
the usual four frames of 2048 x 1080 digital samples – this now becomes four frames of 1024 x
540 (approximately one megapixel frames each). These frames are then subject to the
upsampling process – shown in Figure 4 – where they are converted to three RGB frames of
2018 x 1080 digital samples. They are then processed in the same manner as the 2K / HD
frames for the normal operation of the camera and delivered to the recording codec as YCrCb
4:2:2 at 120 fps.
Figure 4
To originate 2K / HD at frame rates as high as 120 fps progressive a center crop is
readout of the image sensor as 1024 x 540 frames that are upsampled to produce three RGB 2048 x
1080 frames
1080 frames
8.0
The 4K UHD Capability of the C300 Mark II
As listed above, the range of enhancements to the overall 2K / HD image performance are
unprecedented. It was recognized that 2K / HD is still the center of worldwide digital
productions and that technological advances had still much to offer in terms of facilitating further
improvements to their picture quality – both for television and television commercial production,
and also for a great deal of moviemaking. Today, both HDR and WCG are considered core
elements of these picture enhancements.
unprecedented. It was recognized that 2K / HD is still the center of worldwide digital
productions and that technological advances had still much to offer in terms of facilitating further
improvements to their picture quality – both for television and television commercial production,
and also for a great deal of moviemaking. Today, both HDR and WCG are considered core
elements of these picture enhancements.
At the same time, it is now clear that 4K / UHD is steadily advancing, and while such services to
the home will still be limited for some time, there is growing adoption of these formats in digital
production to support the shelf life of higher end programming assets.
the home will still be limited for some time, there is growing adoption of these formats in digital
production to support the shelf life of higher end programming assets.
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