STV82X7 datasheet(26/156 Pages) STMICROELECTRONICS

26 / 156 page

Dedicated Digital Signal Processor (DSP)

STV82x7

26/156

The main features depend on the path:

● FM Channel

— DC Removal

— Prescaling

— De-emphasis (50 or 75 us)

—Stereo Dematrix

● NICAM Channel

— DC Removal

— Prescaling

— De-emphasis (J17)

— Dematrix

● Input SCART Channel

— DC Removal

— Prescaling

● Input I²S Channel

— I²S Prescaling

● Digital Audio Matrix

— Audio Channel Multiplexer between the different sources (IF, I²S, SCART) towards all

outputs (S/PDIF, LS, HP or SCART).

● Autostandard management

— device configuration depending on the standard to be detected

— freeze the device when a standard is detected

— once a standard detected, check that there is no change in the detection status

— set the correct action depending on any change in the detection status (mono backup or

mute setup and new standard detection)

● SCART

— Downmixing: LT / RT or L0 / R0 (see AC-3 specification)

— Soft Mute

4.2

Audio Processing

The following software is provided for main loudspeakers (L, R, C, LS, RS, SubW):

● Downmix

● Dolby

® Pro Logic II® Decoder (LT, RT → L, R, C, Ls, Rs, SubW) with Bass Management

● ST WideSurround, ST OmniSurround, SRS

® WOW™ or SRS® TruSurround XT® (certified

Virtual Dolby

® Surround and Virtual Dolby® Digital)

● ST Dynamic Bass

● Smart Volume Control (SVC)

● 5-band Equalizer or Bass-Treble

● Loudness

● Volume with independent channels (Smooth Volume Control)

● Master Volume Control

● Mute/soft-mute

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