STV3550 datasheet(20/144 Pages) STMICROELECTRONICS

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STV3550

Video Functional Description

3.1

Standard Definition Input (SDIN)

The Standard Definition Input (SDIN) processes video signals before their storage in the external

SDRAM. The SDIN includes the following features and functions:

●

4:2:2 D1 Input Stream De-multiplexing including ancillary data extraction

●

Horizontal and Vertical Decimation by 2 and 4 with horizontal and vertical anti-aliasing filters

(with programmable coefficients)

●

3D-Temporal Noise Reduction based on a proprietary ST algorithm

●

Noise Level Estimator used to control the 3D-TNR through a software loop

●

Motion Estimator to perform film mode detection or scene change detection through a software

loop

3.1.1

System Description

3.1.1.1 D1 Interface

The D1 interface extracts the luma and chroma pixels from the 8-bit data stream as well as the

ancillary data embedded in the horizontal and vertical blanking interval (VBI). This data includes VBI

data such as Teletext, Closed Caption, WSS, VPS, etc... and sync pulses for horizontal and vertical

synchronization.

Figure 7: SDIN Block Diagram

VSYNC

STBus Interface

anc_data

D1H/V

Cr/Cb

Yn in

Cr/Cb

Yn-1

Yn-2

YCrCb

CLK_DATA

HSYNC

Interface

H/V

Filter

Decimation

by 2 and 4

3D-TNR

Noise

Level

Estimator

Level

Motion

Estimator

Interrupts

Synchronization

H50

V50

Field Parity

Registers

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