Sony RDR-GX7 - Manual (Page 21)

High quality image performance
from input to output
The distinct advantage of a DVD recorder is that the DVD
medium exhibits superior durability and performance, making it
ideal for the storing of video content. When a video is recorded
onto DVD, it's essential to maintain the quality of the original
image. For this reason, Sony has designed and engineered the
RDR-GX7 to maintain top quality image performance from input
to output. DVD recording employs MPEG compression, so if
video sources containing noise are encoded, this noise becomes
data. This not only reduces the entire data volume available for
the video image, but will also emphasize the noise and create
new types of noise. Old video tapes, or other sources offer
significantly inconsistent picture quality and colour quality. To
remedy this, the RDR-GX7 takes a different approach to the
conventional practice of simply recording the input signal as is.
Instead, this new advanced approach makes use of various types
of pre-processing to clean up the signal before encoding it into a
video image, ready for recording. In addition, in the encoding
process, regardless of the format to be used for recording, a VBR
(Variable Bit Rate) system is employed to ensure recording with
the highest possible image quality. Then, during playback,
advanced technologies, developed through several generations of
Sony DVD players, are employed to assure optimum
performance. In this way, the RDR-GX7 handles all image data,
in every stage from input to output, in such a way that improved
image quality is assured. This approach sets a new standard of
high quality image performance for both DVD recording and
playback.
Chapter 4-4
High quality
image & sound
High quality image performance
for recording and playback on DVD
RDR-GX7 Technical Notes
21
Original Source
Pre Process
Pre Process
Encoding
Encoding
Post Process
Post Process
NSV DAC etc.
VBR Enc
noise
Input signal
Broadcast
Output signal
VHS
8mm
Improve the original picture quality before encoding
Play back the recorded disc
with high picture quality
High picture quality encoding
- TBC
- Pre Frame NR
- Pre Video Equalizer
- Precision Cinema Progressive
- BNR (H/V)
- Motion Adaptive Field NR
- 12-bit 108 MHz Noise Shaped Video DAC
- Post Video Equalizer
- VBR MPEG encoding for all formats
High performance at each operation stage
Tuner
Video In
Video Out
Video
Decoder
Video
Encoder
Progressive
Circuit
MPEG
Encoder
MPEG
Decoder
BNR BNR
Pre Video EQ Pre Frame NR TBC
Post Video EQ Post Field NR
Drive
Interface
DVD Drive
Graphics
VBR Encoding
Video
Processor
Multi-stage processing during both input and output
assures high image quality