參數(shù)資料
型號(hào)： TDA9875A
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 消費(fèi)家電
英文描述： Digital TV Sound Processor DTVSP
中文描述： SPECIALTY CONSUMER CIRCUIT, PDIP64
封裝： SHRINK, PLASTIC, DIP
文件頁(yè)數(shù)： 16/96頁(yè)
文件大?。?/td> 296K
代理商： TDA9875A
1999 Dec 20
16
Philips Semiconductors
Product specification
Digital TV Sound Processor (DTVSP)
TDA9875A
6.2.13
E
XPERT MODE
The TDA9875A provides a special expert mode that gives
directwriteaccesstotheinternalCoefficientRAM(CRAM)
of the DSP. It can be used to create user-defined
characteristics, such as a tone control with different corner
frequencies or special boost/cut characteristics to correct
the low-frequency loudspeaker and/or cabinet frequency
responses by means of the bass boost filter. However, this
mode must be used with great care.
More information on the functions of this device, such as
the number of coefficients per function, their default
values, memory addresses, etc., can be made available
on request.
6.2.14
DSP
FUNCTIONS
Table 5
Overview of DSP functions
FUNCTION
EXPERT
MODE
PARAMETER
VALUE
UNIT
Bass control for loudspeaker and
headphone output
yes
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
control range
resolution
resolution at frequency
corner frequency
control range
resolution
mute position at step
processing time
12 to +15
1
40
12 to +12
1
14
0 to +18
1
40
0 to +20
2
20
350
83 to +24
1
1010 1100
32
dB
dB
Hz
dB
dB
kHz
dB
dB
Hz
dB
dB
Hz
Hz
dB
dB
Treble control for loudspeaker and
headphone output
yes
Contour for loudspeaker output
yes
Bass boost for loudspeaker output
yes
Volume control for each separate
channel in loudspeaker and
headphone output
no
Soft mute for loudspeaker and
headphone output
Spatial effects
Pseudo stereo
Beeper additional to the signal in
the loudspeaker and headphone
channel
no
ms
yes
yes
yes
anti-phase crosstalk positions
90 degrees phase shift at frequency
beep frequencies
control range
resolution
mute position at step
step width
AVL output level for an input level
between 0 and
29 dB (full-scale)
attack time
decay time constant
30, 40 and 52
150, 200 and 300
see Section 10.3.38
0 to
93
3
0010 0000
quasi continuously
23
%
Hz
dB
dB
Automatic Volume Level (AVL)
yes
dB
10
2, 4 and 8
ms
s
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