TDA9875 Philips Semiconductors, TDA9875 Datasheet - Page 53

• Manufacturer Part Number: TDA9875
• Description: Digital TV Sound Processor DTVSP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 60 Pseudo control setting
Table 61 Spatial control setting
Table 62 Description of Table 58 (notes 1, 2 and 3)
Notes
1. Switching the AVL off will reset the associated hardware to a defined state.
2. When the signal source for the Main channel is changed while the AVL is on, the AVL needs to be reset in order to
3. The pseudo stereo function is based on an all-pass filter. A 90 degrees phase shift occurs at the frequencies stated
10.3.23 V
10.3.23.1 Description
These two registers control the volume setting of the Main (loudspeaker) channel. The register at subaddress 26 applies
to the left channel signal, while the register at subaddress 27 applies to the right channel signal.
Balance control is exercised by offsetting the left and right channel volume settings.
1998 Feb 13
AVL0, AVL1 These bits set the mode of operation of the automatic volume level control function at the entrance to
PSEUDO0,
PSEUDO1
SPATIAL0,
SPATIAL1
Digital TV Sound Processor (DTVSP)
NAME
avoid excessive settling times. This can be achieved by switching the AVL off and on again.
in Table 60. There is a gain of 3 dB in the audio channel containing the filter.
OLUME CONTROL REGISTERS
the Main (loudspeaker) channel.
These bits set the amount of the effect function (pseudo stereo) for mono signals in the Main channel.
This function should be activated only in accordance with the result of the sound mode identification.
These bits set the amount of the effect function (stereo base width expansion) for stereo signals in the
Main channel. This function should be activated only in accordance with the result of the sound mode
identification.
B3
B5
0
0
1
1
0
0
1
1
(
MAIN
)
B2
B4
53
0
1
0
1
0
1
0
1
FUNCTION
PSEUDO SETTING
SPATIAL SETTING
Preliminary specification
(Hz)
300
200
150
(%)
off
off
30
40
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TDA9875