DATASHEET FN7743 TW2851 Rev. 0.00 August 17, 2012 4-Channel A/V Decoder with Multiplexer/VGA/LCD Display Processor for Security Applications to both VGA / LCD and the CVBS output The TW2851 is a fully integrated A/V decoder, simultaneously. Before the VGA / LCD output, there multiplexer, and display processor chip. It has eight is a 2D de-interlacer converting the interlaced video CVBS analog inputs fed into four internal high into progressive for any PC monitor / LCD panel quality NTSC/PAL video decoders. It has four digital with resolution up to WXGA+ (1440x900) input ports supporting various type of input format, resolution. The VGA interface provides RGB including four BT 656 inputs, two BT 601 inputs, or component with both analog output through 3 one 1120 playback input. It has one optional VGA embedded DACs and digital TTL outputs. The LVDS display controller or LCD panel controller, two CVBS interface provides single or dual channel output to display, one digital SPOT output, two digital drive various TFT LCD panels. recorder outputs, and one digital display output. Every output has its associated graphic overlay The SPOT multiplexer functions as a either SPOT function that displays bitmap for OSG, single box, display or a secondary record mux. It supports 2D array box, borders, privacy mask, and mouse single D1 frame rate output. When used as display cursor. purpose, it is capable of supporting 1 / 4 windows in a fixed configuration. When used as record mux The four built-in video decoders include four anti- purpose, it is capable of supporting quad window or aliasing filters, 10bit Analog-to-Digital converters, frame / field interleave multi-channel stream in proprietary digital gain/clamp controller, and high single D1 frame rate. quality Y/C separator to reduce cross-noise. Associated with each video decoder, there are built- There are two built-in video encoders features two in motion, blind, and night detectors to provide 10-bit embedded DACs to provide 2 CVBS outputs. alarm signals, a noise reducer to reduce the The two video encoders are flexibly configurable to impulse noise, and 3 sets of downscalers to output any two of the display, SPOT and record path provide proper video size into the display, record, video content. and SPOT multiplexers. The TW2851 also includes an audio CODEC with The TW2851 MUX function selects video inputs five audio Analog-to-Digital converters and one from any video decoder/ digital inputs to any of Digital-to-Analog converter. A built-in audio recording / SPOT / VGA display / CVBS display multiplexer generates digital outputs for recording / outputs flexibly. The recording multiplexer supports mixing and accepts digital input for playback. frame / field and byte-interleaved multi-channel video streams in the format of BT 656, BT 1120 to TW2851 features a cascade function to allow up to interface with external video compression CODEC. 4 TW2851 chips to connect together to increase the The frame / field allocation of each channel can be total number of channels / windows supported in flexibly configurable in the multi-channel video VGA display and SPOT display. With 4 chips stream. The multi-channel video stream features cascaded together, the VGA display path can built-in channel ID to identify channels of interest display up to 32 display windows, and the SPOT for the CODEC or playback module to properly de- display can display up to 16 windows. multiplex the multi-channel stream into single channel streams. The motion / night / blind Analog Video Decoder detection information are also embedded as part of 4 sets of video decoder accept all the channel ID. NTSC(M/N/4.43) / PAL The display multiplexer displays up to 8 video (B/D/G/H/I/K/L/M/N/60) standards with auto detection windows, with 4 for video decoders and 4 for either digital interface or video decoder interface to 8 CVBS analog inputs for pseudo 8 channel support pseudo 8 channel inputs. The location and support size of each of the 8 display windows are flexibly Integrated video analog anti-aliasing filters and 10 configurable. The multiplexed display video is sent bit CMOS ADCs for each video decoder FN7743 Rev.0.00 Page 1 of 380 August 17, 2012 TW2851 High performance adaptive 4H comb filters for all Programmable hue, saturation, contrast, NTSC/PAL standards brightness and sharpness IF compensation filter for improvement of color Proprietary fast video locking system for non-real- demodulation time application Color Transient Improvement (CTI) Noise Reduction to remove impulse noise Automatic white peak control Triple high performance scalers scale video input TFT LCD Panel Support independently for each of display, recording and Supports panel with similar resolution as the VGA SPOT path port Four built-in motion detectors with 16 X 12 cells, Supports single or dual channel LVDS panel four blind and night detectors Supports Panel power sequencing. Digital Input Ports Supports DPMS for monitor power management Supports up to 4 BT. 656 ports, 2 BT. 601, 1 port Display CVBS Output RGB, or 1 port BT. 1120. The BT 1120 supports a 54 MHz channel with 4 D1 put together. Display Output through one of the two built-in Auto cropping / strobe for playback input using 2 CVBS video encoder built-in Analog / Digital Channel ID decoder for Built-in 2-layer 9-windows bitmap OSG with 16-bit selecting 4 out of maximum of 16 channels from per pixel color multi-channel input stream Additional OSG layers such as window border box, 4 built-in down scalers for displaying arbitrary size 2D motion box, mouse cursor, and Privacy Mask windows on the display output overlay Analog/Digital VGA Display Display Multiplexer Native Resolution of VGA, D1, SVGA, XGA, up to Displays 8 windows for 4 video decoder inputs WXGA+ (1440x900), capable of displaying 4 D1 plus 4 digital input channels or 8 video decoder screens side by side without downscaling. channels to support pseudo 8-channel Up-Scaler for ZOOM function and playback of full Either Live or Strobe capture mode for pseudo 8- screen D1 image channel support 3 Built-in DACs for analog VGA RGB output Horizontal / Vertical mirroring for each window Digital RGB interface in 24-bit TTL output Last field / frame image captured when video-loss DDC channel interface to read the external detected monitor configuration Simultaneous output to both VGA/LCD and CVBS Built-in 2D De-interlacer for progressive output output with the same video content Sharpness control with horizontal/vertical peaking Record Multiplexer Black/White Stretch 2 ports of BT. 656, 1 port BT. 601, or 1 port of Programmable hue, brightness, saturation, BT.1120-like digital Interface support up to 4 D1 contrast real-time recording output to external CODEC Independent RGB gain and offset controls Supports Frame/Field Interleaved mode with 8 picture types or byte interleaved stream for multi- Programmable Gamma correction for each of channel video output RGB Either Live or Strobe capture mode for pseudo 8- Built-in 2-layer 9-window bitmap OSG with 16-bit channel support per pixel color Supports dynamic field / frame picture-type and Hardware OSG bitmap up-scaler to allow same channel allocation through a switching queue up content displayed on both VGA/LCD and CVBS to 2048 entries output Horizontal / Vertical mirroring for each window Additional OSG layers such as window border box, 2D motion box, Privacy Mask overlay, and Mouse 2 Built-in channel ID encoder carrying channel and Cursor support motion / blind / night detection information of each field/frame in multi-channel stream FN7743 Rev.0.00 Page 2 of 380 August 17, 2012