Chapter
1
8
Features
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Overview
Features
The PDW-70MD is a professional disc recorder
supporting HD playback and recording with Professional
Disc
1)
media.
When you use this unit in combination with a nonlinear
editing system, the FAM
2)
function enables data file
transfers between the unit and computers over the i.LINK
interface, allowing the unit to be used like an external hard
drive. The unit can be connected to Sony nonlinear editors,
monitors, and video equipment with HDSDI interfaces via
its standard HDSDI I/O connectors. It incorporates a color
LCD display, allowing you to check video and use the
menu system without connecting an external monitor.
1) Professional Disc is a trademark of Sony Corporation.
2) FAM: File access mode
Features of This Unit
The principal features of this unit are as follows.
MPEG HD
1)
codec
High-quality video and audio recording and
playback
The MPEG HD codec provides video compression
compliant with the MPEG-2 MP@HL standard. It enables
HD 4:2:0 digital component file recording in the 1080i
(1,080 effective scanning lines, interlaced) format
currently in use by many broadcast facilities.
Uncompressed PCM recording of 16-bit 48 kHz audio
delivers a wide dynamic range with a high signal-to-noise
ratio.
1) MPEG HD is a trademark of Sony Corporation.
Video bitrates and audio channels selectable
according to application
You can select the appropriate video bitrate for your
application from three video bitrate modes: 35 Mbps (HQ:
high quality mode), 25 Mbps (SP: standard mode), and 18
Mbps (LP: long-play mode). You can select 2-channel or
4-channel audio. If the audio channel modes are the same,
different video bitrates can be mixed on the same disc.
Rich selection of recording and playback
functions
Support for multiple frame frequencies
The unit can record and play back four different frame
frequencies: 1080/59.94i (displayed as 60I), 50i (displayed
as 50I), 29.97PsF (displayed as 30P), and 25PsF.
HD downconvert function
The unit is provided with a downconvert function. HD disc
playback signals can be downconverted to SD signals and
then output as SDSDI or composite signals, or output via
the i.LINK (DV) interface. This allows you to shoot and
record masters in an HD environment, and to use SD
nonlinear editors and monitors for editing and program
output.
DVCAM upconvert function
The unit features an upconvert function, with the ability to
upconvert to HD and output HDSDI signals when playing
back DVCAM discs.
Recording of proxy AV data
Proxy AV data is a low-resolution (1.5 Mbps video, 64
kbps per audio channel), MPEG-4 based version of a full-
resolution data stream. Whenever this unit records full-
resolution MPEG HD data, it simultaneously generates
and records low-resolution proxy AV data. Because of its
small size, proxy AV data can be transferred quickly over
computer networks, easily edited in the field with laptop
computers,
1)
and readily used in a wide variety of
applications, such as content management on small-scale
servers.
Содержание PDW-70MD
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