Sony PDW-70MD Benutzerhandbuch

Chapter

8

Features

  

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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

The principal features of this unit are as follows.

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.

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.