Grass Valley K2 Media Client System Guide Oct.10 2006 - Manual (Page 128)

128 K2 Media Client System Guide September 7, 2006
Appendix A Specifications
Playout of multiple formats
The K2 Media Client automatically handles material of various types and formats as
specified in the following sections:
Playout on SD-only models
On SD-only models, for a given frame rate, you can play clips of any format
back-to-back on the same timeline. Refer to table
“Video codec description – SD-only
models” earlier in this chapter for a list of the supported formats.
On SD-only models, both 16:9 and 4:3 resolution formats can be played on the same
timeline. Refer to
“Aspect ratio conversions” on page 130 .
Both SD-only and HD/SD models support mixed clips with uncompressed and
compressed (Dolby-E) audio on the same timeline. (requires external Dolby-E
decoder).
Refer to “VBI/Ancillary data specifications” on page 131 for specifications on how
SD-only models handle VBI data and ancillary data.
Playout on HD/SD models
On HD/SD models, for similar frame rates (25/50 fps or 29.97/59.95 fps), MPEG SD
material transferred or recorded into the K2 Media Client along with its audio is
up-converted when played on a HD output channel. Likewise, HD material is
down-converted along with its audio when played on SD output channel. HD and SD
clips can be played back-to-back on the same timeline, and aspect ratio conversion is
user configurable. Refer to
“Aspect ratio conversions” on page 130 . Refer to the
following tables for specifications on SD and HD conversions.
Refer to “VBI/Ancillary data specifications” on page 131 for specifications on how
HD/SD models handle VBI data.
25/50 fps conversions on HD/SD models
Converted SD format Converted HD formats
625 at 25 fps 1080i at 25 fps 720p at 50 fps
S
our
c
e
S
D
fo
rmat
625 at 25 fps No conversion Up-convert
SD to HD Up-convert
SD to HD
So
ur
c
e
HD f
o
rm
ats
1080i at 25 fps Down-convert
HD to SD No conversion Cross-convert
from 1080i to
720p
720p at 50 fps Down-convert
HD to SD Convert
HD to HD No conversion