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PDF STV8257 Data sheet ( Hoja de datos )
| Número de pieza | STV8257 | |
| Descripción | (STV82x7) Digital Audio Decoder/Processor | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STV8257 (archivo pdf) en la parte inferior de esta página. Total 70 Páginas | ||
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® STV82x7
Digital Audio Decoder/Processor
for A2 and NICAM Television/Video Recorders
Key Features
■ Full-Automatic Multi-Standard Demodulation
● B / G / I / L / M / N / D / K Standards
● Mono AM and FM
● FM 2-Carrier (German and Korean Zweiton) and
www.DataSheeNt4ICUA.cMom
■ Multi-Channel Capability
● 3 I²S digital inputs, S/PDIF (in/out)
● 5.1 analog outputs
● Dolby® Pro Logic®
● Dolby® Pro Logic II®
■ Sound Processing
● ST royalty-free processing: ST WideSurround, ST
OmniSurround, ST Dynamic Bass, SRS® WOW™,
SRS® TruSurround XT™ which is Virtual Dolby®
Surround and Virtual Dolby® Digital compliant
● Independent Volume / Balance for Loudspeakers
and Headphone
● Loudspeakers: Smart Volume Control (SVC),
5-band equalizer and loudness
● Headphone: Smart Volume Control (SVC), Bass-
Treble, Loudness and SRS® TruBass™
■ Analog Audio Matrix
● 4 stereo inputs
● 3 stereo outputs
● THRU mode
■ Audio Delay for Audio Video Synchronization
● Embedded stereo delay up to 120 ms for lip-sync
function (up to 180 ms for tuner input)
● Independent delay on headphone and loudspeaker
channels
The STV82x7 family, based on audio digital signal
processors (DSP), performs high quality and advanced
dedicated digital audio processing.These devices
provide all of the necessary resources for automatic
detection and demodulation of analog audio
transmissions for European and Asian terrestrial TV
broadcasts.
PRELIMINARY DATA
Virtual or true, multi-channel capabilities and easy digital
links make them ideal for digital audio low cost consumer
applications. Starting from enhanced stereo up to
independent control of 5 loudspeakers and a subwoofer
(5.1 channels), the STV82x7 family offers standard and
advanced features plus sound enhancements, spatial
and virtual effects to enhance television viewer comfort
and entertainment.
Typical Applications
● Analog and digital TV with virtual surround sound
● Analog and digital TV with multi-channel surround
sound
● DVD and HDD recorders
● “Palm size” portable TV
STV82x7®
© 2004 SRS Labs, Inc. All rights reserved, SRS and
the SRS logo are registered trademarks of SRS Labs, Inc.
“Dolby”, “Pro Logic”, and the double-D symbol are trademarks of
Dolby Laboratories.
February 2005
Rev. 3
1/149
1 page  
STV82x7
12.12
12.13
12.14
12.15
12.16
12.17
12.18
12.19
12.20
www.DataSheet4U1.2co.2m1
12.22
12.23
12.24
Automatic Standard Recognition ........................................................................................ 81
Audio Preprocessing and Selection Registers ................................................................... 85
Matrixing ............................................................................................................................. 93
Audio Processing ............................................................................................................... 98
5-Band Equalizer / Bass-Treble for Loudspeakers .......................................................... 112
Headphone Bass-Treble .................................................................................................. 113
Volume ............................................................................................................................. 116
Beeper .............................................................................................................................. 126
Mute ................................................................................................................................. 127
S/PDIF .............................................................................................................................. 128
Headphone Configuration ................................................................................................ 128
DAC Control ..................................................................................................................... 129
AutoStandard Coefficients Settings ................................................................................. 130
Chapter 13 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132
13.1 Absolute Maximum Ratings ............................................................................................ 132
13.2 Thermal Data .................................................................................................................. 132
13.3 Power Supply Data .......................................................................................................... 132
13.4 Crystal Oscillator ............................................................................................................. 133
13.5 Analog Sound IF Signal .................................................................................................. 133
13.6 SIF to I²S Output Path Characteristics ............................................................................. 134
13.7 SCART to SCART Analog Path Characteristics .............................................................. 134
13.8 SCART and MONO IN to I²S Path Characteristics .......................................................... 135
13.9 I2S to LS/HP/SUB/C Path Characteristics ....................................................................... 135
13.10 I²S to SCART Path Characteristics .................................................................................. 136
13.11 MUTE Characteristics ...................................................................................................... 136
13.12 Digital I/Os Characteristics ............................................................................................... 136
13.13 I²C Bus Characteristics .................................................................................................. 137
13.14 I2S Bus Interface .............................................................................................................. 138
Chapter 14 Input/Output Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
Chapter 15 Package Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
Chapter 16 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
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5 Page 
STV82x7
General Description
Figure 2: STV8237 Typical Application (Enhanced Stereo)
or
www.DataSheet4U.com
Tuner
STV8237
Multistandard Demodulation
- FM 2-carrier and NICAM
Sound Processing
- Volume, Balance, 5-Band Equalizer
- ST WideSurround
- SRS® WOW™
R
SubW
L
Left Right
Figure 3: STV8247 Typical Application (Analog Virtual Sound)
Tuner
STV8247
Multistandard Demodulation
or - FM 2-carrier and NICAM
Sound Processing
- Volume, Balance, 5-Band Equalizer
- SRS® TruSurround XT™
- ST OmniSurround
- Virtual Dolby® Surround1
R
SubW
L
Left Right
1. When using VDS with ST OmniSurround or SRS TruSurround XTTM, a Pro Logic® decoder is mandatory.
11/149
11 Page | ||
| Páginas | Total 70 Páginas | |
| PDF Descargar | [ Datasheet STV8257.PDF ] | |
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