BSP3505D Micronas Intermetall GmbH, BSP3505D Datasheet - Page 16

• Manufacturer Part Number: BSP3505D
• Manufacturer: Micronas Intermetall GmbH

16
BSP 3505D
4.4.6. Spatial Effects Loudspeaker Channel
Spatial Effect Strength
Loudspeaker
Enlargement 100%
Enlargement 50%
Enlargement 1.5%
Effect off
Reduction 1.5%
Reduction 50%
Reduction 100%
Spatial Effect Mode
Loudspeaker
Stereo Basewidth En-
largement (SBE) and
Pseudo Stereo Effect
(PSE). (Mode A)
Stereo Basewidth En-
largement (SBE) only.
(Mode B)
Spatial Effect Cus-
tomize Coefficient
Loudspeaker
max high pass gain
2/3 high pass gain
1/3 high pass gain
min high pass gain
automatic
0005
0111 1111
0011 1111
0000 0001
0000 0000
RESET
1111 1111
1100 0000
1000 0000
0005
0000
RESET
0000
0010
0005
0000
RESET
0010
0100
0110
1000
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H
7F
3F
01
00
FF
C0
80
[7..4]
0
0
2
[3..0]
0
2
4
6
8
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There are several spatial effect modes available:
Mode A (low byte = 00
used spatial effect. Here, the kind of spatial effect de-
pends on the source mode. If the incoming signal is in
mono mode, Pseudo Stereo Effect is active; for stereo
signals, Pseudo Stereo Effect and Stereo Basewidth
Enlargement is effective. The strength of the effect is
controllable by the upper byte. A negative value reduces
the stereo image. A rather strong spatial effect is recom-
mended for small TV sets where loudspeaker spacing is
rather close. For large screen TV sets, a more moderate
spatial effect is recommended. In mode A, even in case
of stereo input signals, Pseudo Stereo Effect is active,
which reduces the center image.
In Mode B, only Stereo Basewidth Enlargement is effec-
tive. For mono input signals, the Pseudo Stereo Effect
has to be switched on.
It is worth mentioning, that all spatial effects affect ampli-
tude and phase response. With the lower 4 bits, the fre-
quency response can be customized. A value of 0000
yields a flat response for center signals (L = R) but a high
pass function of L or R only signals. A value of 0110
has a flat response for L or R only signals but a lowpass
function for center signals. By using 1000
quency response is automatically adapted to the sound
material by choosing an optimal high pass gain.
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PRELIMINARY DATA SHEET
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