Sony Betacam SX DNW-A100 Maintenance Manual page 388

A-4. Signal Processing
Playback of Betacam SX Tape
This unit uses multiple-tracing technology in which the
number of playback heads is larger than that of recording
heads. This technology requires no high-precision track-
ing. It also enables data to be played back at high speed by
increasing the number of playback heads.
The data played back by multiple heads is error-corrected
using an inner code by an ECC decoder. After that, valid
data is selected from memory according to error informa-
tion and error-corrected using an outer code. The correct-
ed video data and audio data are output to the 1. SDTI
output terminal *1 , 2. hard disk drive, 3. SDI output termi-
nal, and 4. video/audio output terminal via an SDTI
interface, respectively. (Refer to Fig. A-4-3.)
Video/Audio Output during High-Speed Playback
(DNW-A100/A100P only)
During high-speed playback (FEED mode) of the Betacam
SX tape and high-speed read from the hard disk drive,
complete data is output from the SDTI output terminal. A
frame-lapse picture is output from the video output
terminal, and a sound generated during fast-forward
playback is output from the audio output terminal. The
output data can be used for monitoring.
PB Amp.
Equalizer
PB Head
Tape
(Betacam SX)
SDTI
Input
(Option)
*1, *2 : DNW-A100/A100P is provided with the SDTI
output terminal.
A-8
SDTI Input (Optionally set to DNW-A100/A100P.)
An SDTI input signal is output to the 1. SDTI output
terminal
4. video/audio output terminal via an SDTI interface,
respectively. (Refer to Fig. A-4-3.)
ECC
Decoder
SDTI
Interface
V
A
Fig. A-4-3
*2
, 2. hard disk drive, 3. SDI output terminal, and
SCSI
Interface
SDI
Interface
Video
MPEG2 4:2:2P@ML
Output
Decoder
Process
Interface
Audio
Output
Process
Interface
SDTI Output
HDD
SCSI Terminal
SDI Output
Video Output
Audio Output
DNW-A100/A50/A45
DNW-A100P/A50P/A45P