Pioneer VSX-922-K Referentiehandleiding - Pagina 4

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Pioneer VSX-922-K Referentiehandleiding
Advanced Sound Retriever
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Pioneer's AV receivers feature the Advanced
Sound Retriever, which restores the output of
compressed audio — such as WMA, MPEG-4 AAC,
and MP3 — to the level of CD sound. The Advanced Sound
Retriever creates new signals to restore the minor details left
out during the compression process.
Multi-Channel Advanced Sound Retriever
Advanced Sound Retriever for multi-surround sound is
compatible with DVD soundtracks featuring Dolby Digital or
DTS.
Auto Sound Retriever
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Since the Advanced Sound Retriever is designed
with an algorithm optimized to process 128 kbps
signal, it did not work well with 8-15 kHz high
frequencies in 64 kbps signal, which is the bit rate for quite a few
internet stations. The newly developed Auto Sound Retriever
automatically determines the audio signal's bit rate, and
interpolates the data lost during compression. It is especially
effective for improving the sound quality of low bit-rate content
— an ideal feature when switching between internet radio
stations with different bit-rates.
Auto Sound Retriever for ARC
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With digital broadcast, although images are displayed in high-
definition, the audio quality is not as high since they are
compressed with various bit rates. By applying Pioneer's Auto
Sound Retriever feature to TV broadcast signals, it adjusts the
effects according to the bit rate transferred via HDMI's ARC
(Audio Return Channel), letting you enjoy digital TV broadcast in
high-definition sound via Pioneer AV receiver.
Sound Retriever Link
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Through HDMI connection, Sound Retriever Link
detects the original audio file information such as
source type, codec, and bit rate played on a
compatible Pioneer Blu-ray Disc player, and automatically
switches to the most suitable Sound Retriever. So there is no
need to switch on/off according to the source. Advanced Sound
Retriever is selected for Blu-ray Disc and DVD sources, and Auto
Sound Retriever is selected for other sources.
* Advanced Sound Retriever is selected for all sources when connected with
a non-compatible Blu-ray Disc player.
Sound Retriever AIR
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When streaming music via Bluetooth, the sound
quality often suffers due to the compression
process. Pioneer's Sound Retriever AIR is the
world's first technology for improving the quality of Bluetooth
transmitted sound. It restores the music cadence lost through
compression, and also reduces the noise generated by
Bluetooth transmission for a better S/N ratio.
* Bluetooth connection by AS-BT100 or AS-BT200 adapter required
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Advanced Sound Retriever
Restoration Image
Restoration of lost music cadence
Sound Retriever ON
CD sound
Compressed
sound
Time
Time
Restoration of lost music cadence
Sound Retriever ON
Compressed
CD sound
sound
Low
Middle
High
Frequency
Low
Middle
High
Frequency
Low
Playback Upper Limit Frequency by Bit Rate
25
20
15
10
5
64
96
128
Bit rate (kbps)
Current Sound Retriever
Upper limit for
unable to play 8-15 kHz
playback differs
range for MP3's 64 kbps
by frequency
Auto Sound Retriever
Compressed Sound
Sound Retriever AIR OFF
Improvement for S/N Ratio
-80
-100
db
-120
1k
Hz
4
AV RECEIVERS REFERENCE GUIDE
Advanced Sound Retriever
Compensation Effect
+0
Restored
sound
-20
-40
-60
-80
Time
-100
-120
-140
0
5k
10k
15k
Restored
sound
Original Sound
Advanced Sound Retriever ON
Advanced Sound Retriever OFF
Middle
High
Frequency
MP3
WMA
AAC
160
192
256
320
Current Sound Retriever
optimized for
128 kbps bit rate
Restored Sound
Sound Retriever AIR ON
14.5dB
: OFF
: ON
20k
20k
Hz