STV82x7
Dedicated Digital Signal Processor (DSP)
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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