Sound Devices PIX 220i, Руководство пользователя и техническая информация

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• 1080 PsF 29.97
• 1080 PsF 25
• 1080 PsF 24
• 1080 PsF 23.976
• 720 p 60
• 720 p 59.94
• 720 p 50
• 720 p 30
• 720 p 29.97
• 720 p 25
• 720 p 24
• 720 p 23.976
• 576 i 50 *
• 480 i 59.94 *
When Setup Menu option
Video

File Resolution/Rate
is set to
Same as Video Input
, recorded
QuickTime files and HDMI and SDI output signals will be of the same resolution and frame rate as
the input video signal.
* Standard definition recording is only available for ProRes 422 HQ, ProRes 422, and ProRes 422 Proxy.
Progressive Segmented Frames (PsF)
Some cameras output video signal in progressive segmented frames (PsF). PsF is a method for
transmitting progressive video in an interlaced stream. A device generates PsF signal by splitting
each frame into two segments. PsF segments are the same as interlaced fields in that one segment
represents the even lines of a frame and the other segment represents the odd lines of a frame. PsF
segments differ from interlaced fields in that there is no motion between each segment in a pair.
The PIX will automatically sense PsF signal from most cameras that output PsF over SDI. This is
accomplished through the use a flag inserted into the SDI signal by the camera. If a camera does
not insert this flag into the SDI stream or if it outputs PsF signal over HDMI, then the PIX setting
Video

Input PsF Detect
can be set to
Interpret 1080i as PsF
. This will force the PIX to treat all
1080i signal as if it were PsF and deinterlace it accordingly.
Selecting a Video Codec
Setup Menu option:
Video

Codec
.
PIX has two families of intra-frame, DCT based codecs available: Apple ProRes and Avid DNxHD,
with four levels of data compression available for each. Both codecs are intermediate codecs that
assist the editing process by eliminating the need to transcode video before importing into Final Cut
(ProRes) or Avid (ProRes or DNxHD).
ProRes is a variable data rate codec; DNxHD is a fixed data rate codec. PIX recorders support all
compression levels and bit rates of DNxHD and ProRes and automatically record the correct bit rate
dependent upon the video input resolutions and frame rate. The data rates indicated in the Setup
Menu item
Video  Codec
indicate the maximum data rate at 1080p30.
DNxHD 36 Mb/s only supports 1080p signal. Standard definition recording is only available for ProRes
422 HQ, ProRes 422, and ProRes 422 Proxy.
Interruption of Signal During Recording
In the event that video signal is lost (an unplugged HDMI or SDI cable, for example) during record-
ing, the PIX recorder will pause the recording and wait for video signal to be re-initialized. If video
signal is re-initialized, the PIX recorder will begin recording again to a new file of the same name
with an “A” appended to the end. Further interruptions of signal during that take will cause an
alphabetic filename progression (“B”, “C”, etc).
PIX 220i and PIX 240i Video Recorder User Guide and Technical Information
30
v. 3.51 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
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ding