TW8809低成本視頻格式轉換器

　　The TW8809 is a low cost video format converter that can take either analog CVBS or 24-bit digital RGB format video and output these signals in ITU-R.656 format. The video sources can be scaled and deinterlaced， so that the ITU-R BT.656 output is already formatted to the desired resolution and in progressive format. In addition， the TW8809 has built-in OSD and image enhancement capabilities.

　　NTSC （M， 4.43） and PAL （B， D， G， H， I， M， N， N combination）， PAL （60）， SECAM with automatic format detection ? Selectable differential or single-ended CVBS input ? Supports two differential or 4 single-ended CVBS inputs ? 10-bit ADC and analog clamping circuit ? Fully programmable static gain or automatic gain control for the Y or CVBS channel ? Programmable white peak control for the Y or CVBS channel ? High quality adaptive 2D comb filter for both NTSC and PAL inputs ? PAL delay line for color phase error correction ? Image enhancement with 2D dynamic peaking and CTI ? Digital subcarrier PLL for accurate color decoding ? Digital horizontal PLL and advanced synchronization processing for VCR playback and weak signal performance ? Programmable hue， brightness， saturation， contrast and sharpness