MITSUMI
Q Surround Processor MM1454
Q Surround Processor
Monolithic IC MM1454
Outline
This is an analog IC virtual surround processor that faithfully reproduces the sound algorithm developed by Q
SOUND Labs, Inc.
In particular, when a stereo signal (L/Rch) encoded by Dolby Pro Logic is input to this IC, a virtual rear speaker
is created spatially, and this allows reproduction of realistic, 3-dimensional sound from two speakers, without
the addition of another speaker.
Q Xpander technology allows deep, spatially wide sound for input of normal stereo signals, as well.
*
Virtual Dolby sound is a system developed by Dolby Labs, Inc. that reproduces realistic Pro Logic sound
with just two front left and right speakers, so there is no need for the additional two rear speakers and
center speaker normally required for Pro Logic sound.
*
Dolby and Dolby Surround are registered trademarks of Dolby Laboratory Licensing Corporation.
*
The Q Surround virtual processor (MM1454) was developed by Mitsumi Electric, and has not received the
certification or authorization of Dolby Laboratory.
*
Mitsumi Electric has no business ties or other relationship with Dolby Laboratory.
Features
1. Virtual rear speakers allow reproduction of 3-dimensional sound through only two speakers when a Pro
Logic encoded source is input.
2. Also reproduces wide sound for a normal stereo source.
3. 2ch input - 2ch output.
4. Few external parts due to use of the active filter created using Mitsumi's bipolar technology.
5. Low noise design Q Surround
ON: 15碌Vrms
OFF: 10碌Vrms
6. Simple structure results in small size and low cost.
Package
SOP-16B
Applications
1. TV, VCR
2. Audio equipment
3. Computer monitors
4. Active speaker systems
Absolute Maximum Ratings
Item
Storage Temperature
Operating Temperature
Power Supply Voltage
Input Voltage
Output Voltage
Allowable loss
(Ta=25擄C)
Symbol
T
STG
T
OPR
V
CC
max.
V
IN
max.
I
O
max.
Pd
Rating
-40~+125
-20~+75
13
0 < V
IN
< V
CC
=
=
10
350
Unit
擄C
擄C
V
V
mA
mW
1
2
3
4
5
