Video Decoder 4ADC 1DAC 10-Bit 256-Pin BGA

The TW2837 has four high quality NTSC/PAL video decoders, dual color display controllers and dual video encoders. The TW2837 contains four built-in analog anti-aliasing filters, four 10-bit Analog-to-Digital converters, and proprietary digital gain/clamp controller, high quality Y/C separator to reduce cross noise and high performance free scaler. Four built-in motion, blind and night detectors can increase security system feature. The TW2837 has flexible video display/record/playback controller including basic display and MUX functions. The TW2837 also has excellent graphic overlay function, which displays bitmap for OSD, single box, 2D array box, and mouse pointer. The built-in channel ID CODEC allows auto decoding and displaying during playback and the additional scaler on the playback supports multicropping function of the same field or frame image. The TW2837 contains two video encoders with three 10-bit Digital-to-Analog converters to provide 2 composite or S-video. The TW2837 also includes audio CODEC that has four 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. The TW2837 can be extended up to 8/16 channel video controller using chip-to-chip cascade connection.

• Improved video decoder with adaptive 4H comb filters for all NTSC and PAL standards
• An enhanced OSD with 256 color look up table and supports OSD Block Move, Block Fill and Bitmap Burst Write functions to enhance the OSD buffer write performance
• PCM 8/16-bit and u-Law/A-Law 8-bit for audio word length
• Additional audio PLL for accurate 8KHz/16KHz sampling rate
• Programmable audio sample rates: 8, 16, 32, 44.1 and 48kHz
• Video field locked audio sample support
• Audio master/slave I2S interface for playback and record Video Decoder
• Accepts all NTSC(M/N/4.43)/PAL (B/D/G/H/I/K/L/M/N/60) standards with auto detection ·
• Integrated four video analog anti-aliasing filters and 10 bit CMOS ADCs
• Color Transient Improvement (CTI)
• Automatic white peak control
• Programmable hue, saturation, contrast, brightness and sharpness
• High performance horizontal and vertical scaler for each path including playback input
• Supports ITU-R BT.656 format or time multiplexed output with 54MHz or 108MHz
• Auto cropping/strobe for playback input with Channel ID decoder
• Supports four channel full D1 record mode