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PDF STV8238 Data sheet ( Hoja de datos )
| Número de pieza | STV8238 | |
| Descripción | Digital Audio Decoder/Processor | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STV8238 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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STV82x8
Digital audio decoder/processor
for BTSC television/video recorders
Features
■ Fully automatic multi-standard demodulation
– M/N standards
– FM mono
– BTSC (US MTS) stereo and SAP standards
■ Multi-channel capability
– 3 x I²S digital inputs
– I²S SRC
– S/PDIF (pass thru/out)
– 5.1 analog outputs
– 1 x I²S digital output (shared with one I²S digital
input)
– 2 x I²S additional digital outputs (TQFP100 only)
– I²S digital loop for external delay (TQFP100
only)
■ Sound processing: Loudspeaker
– Dolby®‚ Pro Logic®‚
– Dolby®‚‚ Pro Logic II®‚
– ST royalty-free processing: ST WideSurroundTM,
ST OmniSurroundTM, (which is Virtual Dolby®‚
Surround and Virtual Dolby®‚ Digital compliant),
ST Dynamic BassTM
– SRS®‚ WOWTM, SRS® TruSurround XTTM,
(which is Virtual Dolby®‚ Surround and Virtual
Dolby®‚ Digital compliant)
– SVC (smart volume control), 5-band equalizer
and loudness
– Independent volume/balance
– Variable beep tone and 3 sampled tones
■ Sound processing: Headphone
– SVC (smart volume control), bass-treble,
loudness and SRS®‚ TruBassTM,
– Independent volume/balance
■ Analog audio matrix
– 4 stereo inputs or 5 stereo inputs (TQFP100
only)
– 3 stereo outputs
– THRU mode
– 2 VRMS capability
■ Audio delay for audio video synchronization
– Embedded stereo delay up to 117 ms for lip-
sync function
– Independent delay on headphone and
loudspeaker channels
– External additional audio delay support
(TQFP100 only)
STV82x8 ®
STV82x8®
TQFP80 Package
TQFP100 Package
Description
The STV82x8 family, based on 24-bit 48kHz audio
DSPs (digital signal processors), performs high quality
and advanced dedicated digital audio processing.The
STV82x8 devices provide all of the necessary
resources for automatic detection and demodulation of
analog audio transmissions for USA, Taiwanese, and
Brazilian terrestrial analog TV broadcasts.
Virtual or true multi-channel capabilities and easy
digital links make them ideal for digital audio low cost
consumer applications. Starting from enhanced stereo
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up to independent control of 5 loudspeakers and a
subwoofer (5.1 channels), the STV82x8 family offers
standard and advanced features plus sound
enhancements, spatial and virtual effects to enhance
television viewer comfort and entertainment.
Table 1. Device summary
Order code
Packaging
STV82x8
Tray
March 2009
Rev 2
1/167
www.st.com
1
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
STV82x8
Contents
17.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
17.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
17.3 Power supply data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
17.4 Crystal oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
17.5 Analog sound IF signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
17.6 SIF to I²S output path characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
17.7 SCART to SCART analog path characteristics . . . . . . . . . . . . . . . . . . . 156
17.8 SCART and MONO IN to I²S path characteristics . . . . . . . . . . . . . . . . . 157
17.9 I2S to LS/HP/SUB/C path characteristics . . . . . . . . . . . . . . . . . . . . . . . . 157
17.10 I²S to SCART path characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
17.11 MUTE characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
17.12 Digital I/Os characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
17.13 I²C bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
17.14 I²S bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
18 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
18.1 TQFP80 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
18.2 TQFP100 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
18.3 Environmentally-friendly packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
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19 Order information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
20 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
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5 Page 
STV82x8
Digital signal processor
The following software is provided for the headphone or auxiliary output:
● Downmix
● SRS® TruBassTM
● ST Dynamic BassTM
● SVC (smart volume control)
● Bass/Treble
● Loudness
● Independent volume for each channel (smooth volume control)
● Soft mute
● Balance
● Beeper
● Adjustable delay for “lip sync” feature up to 120 ms (to compensate for audio/video
latency)
The following software is provided for SCART or S/PDIF outputs:
● Downmix
● Soft Mute
2.3 ST WideSurround
STV82x8 offers three preset ST WideSurroundTM sound effects on the loudspeakers path:
● Music, a concert hall effects
● Movie, for films on TV
● Simulated stereo, which generates a pseudo-stereo effect from mono source
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“ST WideSurround” sound 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 (Autostandard) depending on the detected stereo or mono source. By
default, “Movie” is selected for surround mode. This value can be changed to “Music” by the
WIDESRND_MODE bit in the WIDESRND_CONTROL register.
Additional user controls are provided to better adapt the spatial effect to the source. The ST
WideSurround Gain (WIDESRND_LEVEL) and ST WideSurround frequency
(WIDESRND_FREQ) registers can be used to enhance music predominancy in music mode
and theater effect and voice predominancy in movie mode.
2.4 ST OmniSurround
STV82x8 offers a spatial virtualizer ST OmniSurroundTM to output any multi-channel input in
stereo on the loudspeakers path.
11/167
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet STV8238.PDF ] | |
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