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STV8247 Datasheet(PDF) 3 Page - STMicroelectronics

Part No. STV8247
Description  Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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 3 page
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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




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