DATA SHEET
MSP 34x0G
2.5.7. Quasi-Peak Detector
2.5.8.2. Adding Harmonics
The quasi-peak readout register can be used to read
out the quasi-peak level of any input source. The fea-
ture is based on following filter time constants:
Micronas BASS exploits the psychoacoustic phenome-
non of the ‘missing fundamental’. Adding harmonics of
the frequency components below the cutoff frequency
gives the impression of actually hearing the low fre-
quency fundamental. In other words: The listener has
the impression that a loudspeaker system seems to
reproduce frequencies although physically not possi-
ble.
attack time: 1.3 ms
decay time: 37 ms
2.5.8. Micronas BASS (MB)
The Micronas Bass system extends the frequency
range of loudspeakers or headphones.
After the adaption of MB to the loudspeakers and the
cabinet, further customizing of MB allows individual
fine tuning of the sound.
Micronas BASS is placed in the subwoofer path. For
applications without a subwoofer, the enhanced bass
signal can be added back onto the Left/Right channels
(see Fig. 2–1 on page 9). MB combines two effects:
dynamic amplification and adding harmonics.
Frequency
MB_HP
Fig. 2–7: Adding harmonics
2.5.8.3. Micronas BASS Parameters
2.5.8.1. Dynamic Amplification
Several parameters allow tuning the characteristics of
Micronas BASS according to the TV loudspeaker, the
cabinet, and personal preferences (see Table 3–11).
For more detailed information on how to set up MB,
please refer to the corresponding application note.
Low frequency signals can be boosted while the output
signal amplitude is measured. If the amplitude comes
close to a definable limit, the gain is reduced automati-
cally in dynamic Volume mode. Therefore, the system
adapts to the signal amplitude which is really present
at the output of the MSP device. Clipping effects are
avoided.
2.6. SCART Signal Routing
2.6.1. SCART DSP In and SCART Out Select
The SCART DSP Input Select and SCART Output
Select blocks include full matrix switching facilities. To
design a TV set with four pairs of SCART-inputs and
two pairs of SCART-outputs, no external switching
hardware is required. The switches are controlled by
the ACB user register (see page 41).
MB_LIMIT
Frequency
MB_HP
MB_LP
SUBW_FREQ
Fig. 2–6: Dynamic amplification
Micronas
May 27, 2003; 6251-476-1DS
15
MICRONAS [ MICRONAS ]
