4-Channel Video Decoder and Audio Codec plus Video Encoder

The TW2865 includes four high quality NTSC/PAL/SECAM video decoders that convert analog composite video signal to digital component YCbCr data for security application. Each channel contains 10 bit ADC and proprietary clamp and gain controllers and utilizes 4H comb filter for separating luminance & chrominance to reduce cross noise artifacts. The TW2865 adopts the image enhancement techniques such as IF compensation filter, CTI and programmable peaking. TW2865 also includes one NTSC/PAL video encoder with two 10 bit DACs to support CVBS and YC output. The TW2865 also includes audio CODEC which has five audio Analog-to-Digital converters and one Digital-to-Analog converter. A built-in audio controller can generate digital outputs for recording/mixing and accepts digital input for playback.