概览

描述

The TW2968 is a low power NTSC/PAL video decoder chip that is designed for video surveillance applications. It consumes very low power in a typical composite input application. The available power down mode further reduces the power consumption. It uses the 1. 0V for digital supply voltage and 3. 3V for I/O and analog power. A single 27MHz crystal is all that needed to decode all analog video standards. The video decoder decodes the base-band analog CVBS into digital 8-bit 4:2:2 YCbCr for output. It consists of analog front-end with input source selection, variable gain amplifier and analog-to-digital converters, Y/C separation circuit, multi-standard color decoder (PAL BGHI, PAL M, PAL N, combination PAL N, NTSC M, NTSC 4. 43) and synchronization circuitry. The Y/C separation is done with high quality adaptive 4H (5-line) comb filter for reduced cross color and cross luminance. The advanced synchronization processing circuitry can produce stable pictures for non-standard signal as well as weak signal.

特性

  • WD1 (960H) and D1 compatible video decoding operation and each channel is programmable
  • NTSC (M, 4.43) and PAL (B, D, G, H, I, M, N, N combination), PAL (60) support with automatic format detection
  • Built-in analog anti-alias filter
  • Eight 10-bit ADCs and analog clamping circuit for CVBS input
  • Fully programmable static gain or automatic gain control for the Y channel
  • Programmable white peak control for CVBS channel
  • 4-H adaptive comb filter Y/C separation
  • PAL delay line for color phase error correction
  • Image enhancement with peaking and CTI
  • Digital sub-carrier PLL for accurate color decoding
  • Digital Horizontal PLL for synchronization processing and pixel sampling
  • Advanced synchronization processing and sync detection for handling non-standard and weak signal
  • Programmable hue, brightness, saturation, contrast, sharpness
  • Automatic color control and color killer
  • ITU-R 656 like YCbCr (4:2:2) output or time multiplexed output with 36/72/144MHz for WD1 or 27/54/108MHz for D1 format
  • Ten integrated audio ADCs processing and one audio DAC
  • Provides multi-channel audio mixed analog output
  • Supports I2S/DSP Master/Slave interface for record output and playback input
  • PCM 8/16-bit and u-Law/A-Law 8-bit for audio word length
  • Programmable audio sample rate that covers popular frequencies of 8/16/32/44.1/48kHz
  • Embedded PTZ Tx pulse generation
  • Two-wire MPU serial bus interface
  • Integrated clock PLL for 144/108MHz clock output
  • Power save and Power down mode
  • Low power consumption
  • Single 27MHz crystal for all standards and both WD1 and D1 format
  • 3.3V tolerant I/O
  • 1.0V/3.3V power supply
  • 128-pin LQFP package (pin compatible with TW2964 128-LQFP version)

文档

文档标题 类型 日期
PDF5.40 MB
数据手册
PDF603 KB
End Of Life Notice
PDF208 KB
Price Increase Notice
PDF74 KB
产品变更通告

设计和开发

软件与工具

软件下载

文档标题 类型 日期
PDF603 KB
End Of Life Notice

模块