STV82X8 datasheet(22/157 Pages) STMICROELECTRONICS

22 / 157 page

Dedicated Digital Signal Processor (DSP)

STV82x8

22/157

The main features depend on the path:

● FM Channel

— DC Removal

—Prescaling

— De-emphasis (50 or 75 us)

— Stereo 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 and ST Bass Enhancer

● Smart Volume Control (SVC)

● 5-band Equalizer or Bass-Treble

● Loudness

● Volume with independent channels (Smooth Volume Control)

● Master Volume Control

● Mute/soft-mute

● Balance

● Beeper

● Pink Noise Generator (used to position the loudspeakers)

● Programmable Delay for each loudspeaker

● Adjustable Delay for “lip sync” up to 120 ms (to compensate for audio/video latency)

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