Difference between revisions of "XDCAM Space Requirements"
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{| width="90%" cellspacing="1" cellpadding="1" border="1" align="center" | {| width="90%" cellspacing="1" cellpadding="1" border="1" align="center" | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | <br> |
| align="center" | '''MPEG HD422'''<br> (50 Mb/sec)<br> 4:2:2* best for chroma key!<br> | | align="center" | '''MPEG HD422'''<br> (50 Mb/sec)<br> 4:2:2* best for chroma key!<br> | ||
| align="center" | '''MPEG HD (HQ)'''<br> (35 Mb/sec) 4:2:0*<br> | | align="center" | '''MPEG HD (HQ)'''<br> (35 Mb/sec) 4:2:0*<br> | ||
| Line 9: | Line 9: | ||
| align="center" | '''DVCAM'''<br> (25 Mb/sec) 4:1:1*<br> | | align="center" | '''DVCAM'''<br> (25 Mb/sec) 4:1:1*<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 1 Minute<br> |
| align="center" | 500 MB<br> | | align="center" | 500 MB<br> | ||
| align="center" | 345 MB<br> | | align="center" | 345 MB<br> | ||
| Line 15: | Line 15: | ||
| align="center" | 270 MB<br> | | align="center" | 270 MB<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 2 Minutes<br> |
| align="center" | 1 GB<br> | | align="center" | 1 GB<br> | ||
| align="center" | 690 MB<br> | | align="center" | 690 MB<br> | ||
| Line 21: | Line 21: | ||
| align="center" | 540 MB<br> | | align="center" | 540 MB<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 10 Minutes<br> |
| align="center" | 5 GB<br> | | align="center" | 5 GB<br> | ||
| align="center" | 3.5 GB<br> | | align="center" | 3.5 GB<br> | ||
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| align="center" | 2.7 GB<br> | | align="center" | 2.7 GB<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 30 Minutes<br> |
| align="center" | 16 GB<br> | | align="center" | 16 GB<br> | ||
| align="center" | 10.5 GB<br> | | align="center" | 10.5 GB<br> | ||
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| align="center" | 8 GB<br> | | align="center" | 8 GB<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 1 Hour<br> |
| align="center" | 32 GB<br> | | align="center" | 32 GB<br> | ||
| align="center" | 21 GB<br> | | align="center" | 21 GB<br> | ||
| Line 39: | Line 39: | ||
| align="center" | 16 GB<br> | | align="center" | 16 GB<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 23 GB Disc<br> |
| align="center" | 43 Minutes<br> | | align="center" | 43 Minutes<br> | ||
| align="center" | 60 Minutes<br> | | align="center" | 60 Minutes<br> | ||
| Line 45: | Line 45: | ||
| align="center" | 85 Minutes<br> | | align="center" | 85 Minutes<br> | ||
|- | |- | ||
| − | | nowrap="nowrap" align="left | + | | nowrap="nowrap" align="left" | 50 GB Disc<br> |
| align="center" | 95 Minutes<br> | | align="center" | 95 Minutes<br> | ||
| align="center" | 145 Minutes<br> | | align="center" | 145 Minutes<br> | ||
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<br> | <br> | ||
| − | [[Image:]] | + | [[Image:Chroma_subsampling.jpg|center]]<br> |
[[Category:CCAM]] [[Category:Multimedia_Lab]] | [[Category:CCAM]] [[Category:Multimedia_Lab]] | ||
Revision as of 16:32, 9 September 2011
Bitrates and space requirements for XDCAM footage can be found in this PDF.
| |
MPEG HD422 (50 Mb/sec) 4:2:2* best for chroma key! |
MPEG HD (HQ) (35 Mb/sec) 4:2:0* |
MPEG HD (SP) (25 Mb/sec) 4:2:0* |
DVCAM (25 Mb/sec) 4:1:1* |
| 1 Minute |
500 MB |
345 MB |
263 MB |
270 MB |
| 2 Minutes |
1 GB |
690 MB |
527 MB |
540 MB |
| 10 Minutes |
5 GB |
3.5 GB |
2.7 GB |
2.7 GB |
| 30 Minutes |
16 GB |
10.5 GB |
8 GB |
8 GB |
| 1 Hour |
32 GB |
21 GB |
16 GB |
16 GB |
| 23 GB Disc |
43 Minutes |
60 Minutes |
90 Minutes |
85 Minutes |
| 50 GB Disc |
95 Minutes |
145 Minutes |
190 Minutes |
185 Minutes |
- Chroma Subsampling Rationale:
Because of storage and transmission limitations, there is always a desire to reduce (or compress) the signal. Since the human visual system is much more sensitive to variations in brightness than color, a video system can be optimized by devoting more bandwidth to the luma component (usually denoted Y or first digit in the notation), than to the color difference components Cb and Cr. The 4:2:2 Y'CbCr scheme for example requires two-thirds the bandwidth of (4:4:4) R'G'B'. This reduction results in almost no visual difference as perceived by the viewer.
