20
Uncompressed
10-bit 4:2:2 (SD)
Data rate:
28 MB/second standard definition—external storage recommended
Quality: Excellent, broadcast quality
Capturing in an uncompressed format results in clearly defined video, and
maintains the full raster size with 4:2:2 chroma sampling. Using an uncompressed
format maintains high quality video from the capture stage of the timeline all the
way through effects rendering stage. Offering all the benefits noted previously for
8-bit uncompressed, 10-bit additionally offers higher color specificity for
compositing and color correction. With Uncompressed 10-bit 4:2:2 media, video
quality is second to none-at any price point - for non-linear post production.
DVCPRO HD
Data rate:
6 to 14 MB/second high definition—supported by internal system
drive
Quality:
Excellent
Io HD can capture to DVCPro HD media via computer processing. DVCProHD
can be played back from a mixed format ProRes 422 codec timeline for
monitoring and/or output in both SD and HD.
Apple ProRes 422
and Apple ProRes
422 HQ
(SD or HD)
Data rate:
18 MB/second ProRes 422, 31 MB/second ProRes 422 HQ—
supported by internal system drive or attached storage
Quality:
Excellent, broadcast quality
Captured media is virtually indistinguishable from pristine uncompressed sources.
Better yet, ProRes maintains the quality during editing, surviving multiple
encoding/decoding generations without degradation. It was designed by Apple for
editing, rather than as a transmission/distribution codec as are most popular
codecs. For HD, this is the preferred workflow for Io HD ingest into Final Cut
Pro 6. Some of the advantages include:
•
Full-size 1920-by-1080 and 1280-by-720 HD resolutions.
•
Full-size 720-by-486 and 720-by-576 SD resolutions.
•
4:2:2 chroma sampling. Provides precise compositing and blending at sharp
saturated-color boundaries.
•
10-bit sample depth. Preserves subtle gradients of 10-bit sources (perfect for
green-screen compositing, graphics or color correction) with no visible
banding artifacts.
•
I frame-only encoding. Ensures consistent quality in every frame and no
artifacts from complex motion.
•
Variable bit-rate (VBR) encoding. “Smart” encoding analyzes the image and
allocates more bits to complex frames.
•
Low data rate requirements make for more storage options and require less
drive space to store high quality video.
Summary of Contents for io hd
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