PRELIMINARY DATA
February 2005
1/149
Rev. 3
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
NICAM
Multi-Channel Capability
3 IS 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
WOWTM,
SRS
TruSurround XTTM 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
TruBassTM
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.
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
ST
V8
2x
7
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.
STV82x7
Digital Audio Decoder/Processor
for A2 and NICAM Television/Video Recorders
STV82x7
2/149
Block Diagram
LS_C
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3/149
STV82x7
Table of Contents
Chapter 1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.1
STV82x7 Overview .............................................................................................................. 8
1.1.1
Core Features ............................................................................................................................................8
1.1.2
Software Information .................................................................................................................................9
1.1.3
Device Input Modes ...................................................................................................................................9
1.1.4
Electrical Features ...................................................................................................................................10
1.2
Typical Applications ........................................................................................................... 10
1.3
Pin Descriptions and Application Diagrams ....................................................................... 14
Chapter 2
System Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Chapter 3
Digital Demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.1
Sound IF Signal .................................................................................................................. 21
3.2
Demodulation ..................................................................................................................... 22
Chapter 4
Dedicated Digital Signal Processor (DSP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.1
Back-end Processing ......................................................................................................... 24
4.2
Audio Processing ............................................................................................................... 25
4.3
ST WideSurround ............................................................................................................... 28
4.4
ST OmniSurround .............................................................................................................. 28
4.5
Dolby Pro Logic II Decoder ................................................................................................ 28
4.6
Bass Management ............................................................................................................. 28
4.6.1
Bass Management Configuration 0 .........................................................................................................29
4.6.2
Bass Management Configuration 1 .........................................................................................................30
4.6.3
Bass Management Configuration 2 .........................................................................................................31
4.6.4
Bass Management Configuration 3 .........................................................................................................32
4.6.5
Bass Management Configuration 4 .........................................................................................................33
4.7
SRS WOW and TruSurround XT ...................................................................................... 33
4.7.1
SRS TruSurround ....................................................................................................................................33
4.7.2
SRS WOW ...............................................................................................................................................34
4.8
Smart Volume Control (SVC) ............................................................................................. 34
4.9
ST Dynamic Bass .............................................................................................................. 35
4.10
5-Band Audio Equalizer ..................................................................................................... 35
4.11
Bass/Treble Control ........................................................................................................... 35
4.12
Automatic Loudness Control .............................................................................................. 36
4.13
Volume/Balance Control .................................................................................................... 36
4.14
Soft Mute Control ............................................................................................................... 37
STV82x7
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4.15
Beeper ................................................................................................................................ 37
Chapter 5
Analog Audio Matrix (In / Out) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Chapter 6
IS Interface (In / Out) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
6.1
IS Inputs ............................................................................................................................ 40
6.2
IS Output ........................................................................................................................... 41
Chapter 7
S/PDIF Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Chapter 8
Power Supply Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
8.1
Standby Mode (Loop-through mode) ................................................................................. 43
Chapter 9
Additional Controls and Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
9.1
Headphone Detection ........................................................................................................ 44
9.2
IRQ Generation .................................................................................................................. 44
9.3
IC Bus Expander ............................................................................................................... 44
Chapter 10
STV82x7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Chapter 11
IC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
11.1
IC Address and Protocol ................................................................................................... 46
11.2
Start-up and Configuration Change Procedure .................................................................. 47
Chapter 12
Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
12.1
IC Register Map ................................................................................................................ 49
12.2
STV82x7 General Control Registers .................................................................................. 55
12.3
Clocking 1 .......................................................................................................................... 56
12.4
Demodulator ....................................................................................................................... 59
12.5
Demodulator Channel 1 ..................................................................................................... 62
12.6
Demodulator Channel 2 ..................................................................................................... 66
12.7
NICAM Registers ............................................................................................................... 71
12.8
Stereo Mode ....................................................................................................................... 73
12.9
Analog Control ................................................................................................................... 74
12.10
Clocking 2 .......................................................................................................................... 76
12.11
DSP Control ....................................................................................................................... 77
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STV82x7
12.12
Automatic Standard Recognition ........................................................................................ 81
12.13
Audio Preprocessing and Selection Registers ................................................................... 85
12.14
Matrixing ............................................................................................................................. 93
12.15
Audio Processing ............................................................................................................... 98
12.16
5-Band Equalizer / Bass-Treble for Loudspeakers .......................................................... 112
12.17
Headphone Bass-Treble .................................................................................................. 113
12.18
Volume ............................................................................................................................. 116
12.19
Beeper .............................................................................................................................. 126
12.20
Mute ................................................................................................................................. 127
12.21
S/PDIF .............................................................................................................................. 128
12.22
Headphone Configuration ................................................................................................ 128
12.23
DAC Control ..................................................................................................................... 129
12.24
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 IS Output Path Characteristics ............................................................................. 134
13.7
SCART to SCART Analog Path Characteristics .............................................................. 134
13.8
SCART and MONO IN to IS Path Characteristics .......................................................... 135
13.9
I2S to LS/HP/SUB/C Path Characteristics ....................................................................... 135
13.10
IS to SCART Path Characteristics .................................................................................. 136
13.11
MUTE Characteristics ...................................................................................................... 136
13.12
Digital I/Os Characteristics ............................................................................................... 136
13.13
IC 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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