Features; Features Of The Srw-5800 - Sony SRW-5800 Operation Manual

Overview

1-1 Features

1-1-1 Features of the SRW-5800

The SRW-5800 is a high-definition digital videocassette
recorder using the HDCAM-SR
to the conventional SRW-5000 in size and weight, and
recording of 4:2:2/1080/50P or 60P signal or HQ recording
of 4:4:4 (RGB) signal can be supported. The SRW-5800 is
also designed considering file transfer through the
network.
1) HDCAM-SR is a trademark of Sony Corporation.
HDCAM-SR format
The HDCAM-SR format exploits technological advances
in signal processing and magnetic recording, to provide
functionality comparable to that of the HDCAM format,
while offering HD digital recording and playback with
high image and sound quality.
The technology incorporated in this unit includes the
following.
• Highly efficient and mild data compression using newly
developed MPEG-4 Studio Profile
• Powerful error-correcting codes
• The drum with a high-performance, high-accuracy head,
together with a new auto-tracking technique, yielding
highly reliable narrow track recording and playback.
These technologies allow 120 minutes of recording on an
HDCAM-SR cassette (L type), the same size as the
HDCAM cassette.
Digital signal processing
In this unit, 4:2:2/4:4:4 component video signals obtained
by quantization according to ITU-R709, SMPTE 274M
and BTA S-002B (SMPTE 260M) are compressed using
MPEG-4 Studio Profile. Audio signals are processed
without compression.
1)
format. It is comparable
Chapter
Input interface
The input interface is based on the HD SDI (HD Serial
Digital Interface) format specified by BTA S-004B/005B/
006B (SMPTE 291M/292M/299M/372M) and ARIB
STD-B4, allowing the BNC coaxial cable to carry one
component video signal, twelve digital audio channels,
and time code in time division multiplex; this is separated
for conversion to parallel data.
Audio recording can be switched between the digital audio
signal multiplexed with the HD SDI signal and the audio
signal from an AES/EBU digital interface.
Bit rate reduction encoder
The component video signal undergoes frame shuffling. It
is then compressed by a process in which it is subjected to
DCT (discrete cosine transform) or DPCM (differential
pulse code modulation), quantization control, and variable
length word encoding. This is the core of the newly
developed MPEG-4 Studio Profile. Interlaced signals are
compressed in fields and progressive signals are
compressed in frames.
ECC encoder
The outer ECC (Error Correction Code) is added to the
compressed video and audio data, followed by the inner
ECC, ID data, and sync data. Reed-Solomon codes are
employed in this error correction system.
Channel coding
Video and audio data with the ECC added is recorded in
the form of serial data. The HDCAM-SR format adopts a
scrambled i-NRZ channel coding system, giving
consideration to off-track and noise characteristics.
Playback signal processing
The playback digital signal is equalized by an equalizer
circuit. It then passes powerful inner and outer ECCs
which can correct dropouts in the reproduced signal. It
further goes through an error concealment circuit to have
errors still remaining in the signal rectified.
Output interface
Component video data is converted into serial data and
multiplexed with audio data and time code, then output in
the HD SDI format.
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1-1 Features