STV8206 STMicroelectronics, STV8206 Datasheet - Page 19

• Manufacturer Part Number: STV8206
• Description: IC TV AUDIO PROC/DEMOD 80-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of STV8206

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STV82x6
3.3
3.4
3.5
required, it complements the dedicated prescaler for FM, NICAM or SCART sources. The internal
level can be measured using the peak detector.
The SVC can be used either in the Loudspeaker or Headphone path (but not both simultaneously).
When used in the Headphone path, the SVC prevents the sound level from becoming suddenly too
strong, causing ear damage. The SVC is configured in registers
ST WideSurround
STV82x6 offers three preset ST WideSurround effects on the Loudspeaker path:
“ST WideSurround” is an extension of the conventional stereo concept which improves the spatial
characteristics of the sound. This could be done simply by adding more speakers and coding more
channels into the source signal as is done in the cinema, but this approach is too costly for normal
home use. The ST WideSurround system exploits a method of phase shifting to achieve a similar
result using only two speakers. It restores spatiality by adding artificial phase differences.
The Surround/Pseudo-stereo mode is automatically selected by the Automatic Standard
Recognition System (AUTOSTD) depending on the detected stereo or mono source. By default,
“Movie” is selected for Surround mode. This value may be changed to “Music” by the STS_MODE
bit in the
Additional user controls are provided to better adapt the spatial effect to the source. The ST
WideSurround Gain (LS_STS_GAIN) and ST WideSurround Frequency (LS_STS_FREQ) registers
can be used to enhance music predominance in Music mode and theater effect + voice
predominancy in Movie mode.
5-Band Audio Equalizer
The Loudspeaker audio spectrum is split into 5 frequency bands and the gain of each of them can
be adjusted within a range from -12 dB to +12 dB in steps of 1 dB. The Audio Equalizer may be
used to pre-define frequency band enhancement features dedicated to various kinds of music or to
attenuate frequency resonances of loudspeakers or the listening environment. The Equalizer is
enabled by the EQ_ON bit in the
programmed in registers LS_EQ_BAND[1:5].
Bass/Treble Control
The gain of bass and treble frequency bands for the headphone can be also tuned within a range
from -12 dB to +12 dB in steps of 1 dB. It may be used to pre-define frequency band enhancement
●
●
●
Music, a concert hall effect
Movie, for films on TV
Simulated Stereo, which generates a pseudo-stereo effect from mono source
LS_SRD_CTRL
f
1
=100Hz f
register.
2
LS_EQ_CTRL
=330Hz
Figure 10: Equalizer
f
3
=1KHz
register. The Bass, Medium and Treble values are
f
4
=3.3KHz
f
5
=6.6KHz
SVC_SEL
Audio Processor Block
and SVC_CTRL.
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