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Playout of multiple formats, Playout on sd-only models, Playout on hd/sd models – Grass Valley K2 Media Client System Guide Oct.10 2006 User Manual

Page 128: 25/50 fps conversions on hd/sd models

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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

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