Pioneer ELITE Blu-ray Disc BDP-85FD Reference Manual page 9

Audio Features
Audio Scaler
88FD
Pioneer's latest Audio Scaler technology consists of Hi-bit32,
Up-Sampling, and Digital Filter, with manual and auto settings.
Hi-bit32
Hi-Bit32 creates a wider dynamic range from digital sources such
as CDs, DVDs, or Blu-ray Discs. The technology requantizes 16, 20,
and 24-bit PCM as well as compressed audio to 32 bits, and the
high frequency component is interpolated during the data
processing for a smoother and more subtle musical expression.
Up Sampling (2ch)
Up Sampling reduces the noise in the audible range, provides
clear sound reproduction, and vividly brings out the delicate
sound details that are often buried within the noise. With manual
settings, you can select from Off/x2/x4 sampling rates.
Digital Filter
The function improves the response characteristics typical of
digital signals. By removing the pre-echo, the outline of the sound
stands out, and audio full of transient feel can be reproduced.
Select"Sharp" for solid and tight sound, and "Slow" for soft and
warm sound.
Balanced Analog Audio Output
88FD
The Blu-ray Disc player is equipped with a pair of balanced
analog audio output terminals, letting you enjoy quality sound
for audio playback.
ELITE BLU-RAY DISC PLAYERS REFERENCE GUIDE
Actual Effects
24-bit vs 32-bit signal wave form comparison
24-bit Processing
1
0
-1
0 2m 4m 6m 8m 10m 12m
Time / s
Effects of Bit Expansion Processing
24-bit Signals
Previous
24-bit DAC
24-bit sine wave
Close up
24-bit resolution 32-bit DAC
input signals
24-bit resolution
32-bit DAC +
Hi-bit32
Red: original analog signals (ideal)
Black: 24-bit digital signals (actual)
Bit expansion processing required to bring out the real
performance from 32-bit DAC.
Digital Filter
Slow
Slow
Sharp
Short
9
32-bit Extension Processing
1
0
-1
14m 0 2m 4m 6m 8m 10m 12m
Time / s
24-bit resolution
Previous
32-bit resolution
DAC alone
makes no
difference
32-bit resolution
DAC + signal
processing
–> closer to
original signal
(in red)
Slow
Sharp
Sharp
Short
14m