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參數(shù)資料
| 型號： | TDA9875AH/V2,557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, QFP |
| 文件頁數(shù)： | 51/96頁 |
| 文件大小： | 324K |
| 代理商： | TDA9875AH/V2,557 |
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1999 Dec 20
55
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
10.3.22 AUDIO EFFECTS REGISTER (MAIN)
Switching the AVL off will reset the associated hardware to a defined state. When the signal source for the Main channel
is changed while the AVL is on, the AVL needs to be reset in order to avoid excessive settling times. This can be achieved
by switching the AVL off and on again.
The pseudo stereo function is based on an all-pass filter. A 90 degrees phase shift occurs at the frequencies stated in
Table 57. There is a gain of 3 dB in the left audio channel.
Table 55 Subaddress 25 (note 1)
Note
1. The default setting at power-up is 0000 0000.
Table 56 Spatial control setting
Table 57 Pseudo control setting
Table 58 AVL control mode
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
B7
0
Default value.
6
B6
0
Default value.
5
SPATIAL1
These bits set the amount of the effect function (stereo base width expansion)
for stereo signals in the Main channel (see Table 56). This function should be
activated only in accordance with the result of the sound mode identication.
4
SPATIAL0
3
PSEUDO1
These bits set the amount of the effect function (pseudo stereo) for mono
signals in the Main channel (see Table 57). This function should be activated
only in accordance with the result of the sound mode identication.
2
PSEUDO0
1
AVL1
These bits set the mode of operation of the automatic volume level control
function at the entrance to the Main (loudspeaker) channel (see Table 58).
0 (LSB)
AVL0
B5
B4
SPATIAL SETTING (%)
0
off
01
30
10
40
11
52
B3
B2
PSEUDO SETTING (Hz)
0
off
0
1
300
1
0
200
1
150
B1
B0
AVL MODE
0
off/reset
0
1
short decay
1
0
medium decay
1
long decay
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