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BIT1612 10-Bit Digital Video Decoder with OSD and T-CON

1 General Description

BIT1612 是結合 T-CON 與 OSD 的一個高性能單晶片數字式視訊解碼器。視訊解碼器解譯普遍使用的

NTSC/PAL/SECAM 影像內容。投向 BIT1612 的信號包括類比視訊 CVBS 和 Y/C、數字式 CCIR601/656 和數字式

RGB 格式。類比/數字轉換器的自動增益控制 (AGC) 功能加強了處理微弱和失真信號的能力。卓越的 2D 梳型濾波

器和先進的 CTI 和 Skin-Tone 處理使顯示顏色更加清楚，圖像更加自然。可編程序的時序控制 (TCON) 讓 BIT1612

系統 (解析度可達 800xRGBx600) 可使用大多數普及的 LCD 屏。可編程序的亮度、對比和色飽和度以及內含的伽瑪

校正讓用戶自由地調整顯示的顏色。嵌入式 OSD 使系統設計師非常容易開發出簡單易用使用者介面。先進的顯示格

式控制器能非常順利地轉換 4:3 顯示成 16:9。BIT1612 可以用在一臺傳統手持式 LCD 顯示器。以其卓越的影像處理

表現，使用在車用 TV/導航系統和便攜式的 AV 系統也是適當的。

2 Features

General:

y No external memory required

y Two 10-bit video CMOS Analog-to-Digital Converters (ADCs) in differential CMOS style for best

S/N-performance

y Fully programmable static gain or automatic gain control (AGC) the selected CVBS or Y/C channel : 0~12db

(Analog) and 0~18db (Digital)

y Automatic Clamp Control (ACC) for CVBS, Y and C

y On-chip clock generator

y L-lock system clock frequencies

y Digital PLL for synchronization and clock generation from all standards and non-standard video sources e.g.

consumer grade VTR

y Requires only one crystal (24.576 MHz) for all standards

y Automatic detection of 50 and 60 Hz field frequency, and automatic switching between PAL and NTSC

standards

y Accepts NTSC (J, M, 4.43), PAL (60, B, D, G, H, I, M, N), and SECAM (B, D, G, K, K1, L) video signal

y User programmable luminance peaking or aperture correction

y Adaptive 3/5-line comb filter for two dimensional chrominance/luminance separation

y PAL delay line for correcting PAL phase errors

y Multi-standard VBI-data slicer including closed caption

y MV copy protection detection

y YUV to RGB color space converting

y Fully programmable zoom-out arbitrary ratio in both horizontal and vertical

y Anamorphic zoom for 4:3 video input to 16:9 display converting

y Embedded brightness, contrast, sharpness and gamma correction

y Embedded Skin-Tone and CTI

y Embedded programmable OSD for user Interface

y Embedded programmable TCON (Timing-Control) generator for LCD interface

y Embedded 3 PWM (Pulse Width Modulation) generators for general purpose control

y Embedded IR remote control decoder

Input:

y 3 analog inputs, internal analog source selectors, e.g. CVBS x 3 or Y/C x 1 or (Y/C x 1 and CVBS x 1) or

YPbPr (480i or 576i)

y 3 of 8-bit digital video input ports (R,G,B)

y HSYNC/VSYNC Input x 1

y Clock Input x 2

y 24-bit RGB/YUV input up to 85MHz

y 16-bit RGB (RGB 5:6:5) input

y 8-bit Serial RGB Data format

y ITU-R BT.601(16-bit) (CCIR 601)

y ITU-R BT.656(8-bit) (CCIR 656)

y Built-in YUV to RGB color space converter

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Zoom V3 1612 Manual de usuario Pagina 11

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