ntsc/pal/secam video decoder for multimedia applications ntsc/pal/secam video decoder for multimedia applications crt, lcd, pdp and projection tv multifunction lcd monitor (monitor tv) dvd-recorder pc tv capture card cctv digital video recorder www.intersil.com techwell techwell target applications features features analog video decoder techwell's TW9919 is a high quality ntsc/pal/secam video decoder that is designed for multimedia applications. it uses the mixed-signal 2.5v/3.3v cmos technology to provide a low-power integrated solution. the TW9919 analog front-end is equipped with six separate analog channels that enable it to accept various analog video input standard including composite video, s-video, component video (ycbcr), and scart rgb. with the analog fb support, it also allows the mixing of composite or s-video input with ycbcr/rgb input. all channels include an analog multiplexer (mux) for maximum flexibility in software controlled input selection. it is possible to connect up to five composite inputs or two s- video inputs or two ycbcr inputs or two scart rgb inputs at one time and allow the software to switch between them. alternatively, a maximum combination of five of these inputs may be switched under software control. in the pip mode, a maximum combination of four composite/s- video input can be mixed with any of two ycbcr/rgb inputs through the front-end contains all the necessary circuits to simplify the system design. the built-in six high quality 10-bit analog-to-digital converters (adcs) convert inputs into digital signals for processing. the TW9919 uses proprietary adaptive 3d comb filter to achieve best ntsc and pal quality fpr stationary portion. for motion part of the image, it employs 2h(ntsc)/4h(pal) comb filter for chroma and luma separation to achieve high video quality. the image enhancement includes horizontal the advanced synchronization processing can produce stable pictures for non-standard signal such as those produced by vcr trick mode. the high quality scaler uses multi-tap poly-phase decimation filter to accurately scale down the image with minimum phase error. it can be programmed to scale-down the output picture to an arbitrary ratio with the TW9919 supports flexible pixel interface. it outputs ycbcr (4:2:2) data stream over 10-bit or 20-bit data path. it also supports both free-running a 2-wire serial mpu interface is used to simplify system integration. all the TW9919 ntsc (m, 4.43) and pal (b, d, g, h, i, m, n, n combination), pal (60), secam support with automatic format detection advanced synchronization processing for vcr fast forward, backward, and pause mode software selectable 14 analog input terminals allow maximum flexibility: up to five composite, or two s-video or two up to two scart rgb inputs with fb. six 10-bit adcs with analog clamping circuit and anti-aliasing filter fully programmable static gain or automatic gain control for the y and g(y) channel programmable white peak control for the y channel high quality rgb/ycbcr mixing by fast blanking signal 6x10-bit multi-standard 3d comb filter video decoder with scart and rgb mixing support external fb control. and vertical peaking, cti and bcs control. cropping. clock and line-locked clock output. functions can be controlled through this interface. ycbcr inputs techwell video decoders
TW9919 block diagram miscellaneous two wire mpu serial bus interface power-down mode typical power consumption 0.4w single 27mhz crystal for all standards supports 24.54mhz and 29.5mhz crystal for high quality square pixel format 3.3v / 5v tolerant i/o 2.5v / 3.3v power supply embedded sdram controller accepts 16mb 128 pin tqpf package techwell video processing high quality motion adaptive 3d comb lter for both ntsc and pal with concurrent 3d noise reduction adaptive 4h comb lter for the best image quality pal delay line for color phase error correction digital sub-carrier pll for accurate color decoding digital horizontal pll and advanced synchronization processing for non-standard video signals programmable hue, brightness, saturation, contrast, and sharpness blue stretch image enhancement with 2d peaking and cti. automatic color control and color killer if compensation lter detection o evel of copy protection according to macrovision standard ycbcr input supports 480i/576i and sub- sampled 480p/576p with auto-detection. ? 2005 intersil americas inc. all rights reserved. the following are trademarks or registered trademarks of intersil americas inc.: intersil, intersil logo, ?i? and design. all other trademarks are the property of the respective trademark owners. www.intersil.com video output supports both free-running and line-locked clock outputs programmable output cropping high quality horizontal filtered scaling with arbitrary scale down ratio vmi 1.4 compatible 10-bit or 20-bit pixel interface itu-r 601 or itu-r 656 compatible output ycbcr(4:2:2) output format vbi slicer supporting industrial standard data services with data packet filter capability built-in vbi fifo for convenient access through host interface vbi data pass through, raw adc data for intercast? field locked audio clock generator TW9919 6x10-bit multi-standard 3d comb filter video decoder with scart and rgb mixing support ntsc/pal/secam video decoder for multimedia applications ntsc/pal/secam video decoder for multimedia applications agc/clam p 4-h adaptive comb filter chroma demodulator mixer sync video interface vbi slicer vbi fifo dvalid field hsync vsync mpout vd(19:0) cb cr clam p adc x 4 adc x 2 h/vdown scaler/cropping rgb-yuv rgb/ycrcb1 rgb/ycrcb0 vbi pass throu g h pdn clkx2 clkx1 y 2wire serial bus sclk sda siad clock 27 mhz contrast saturation brightness tint fb y contrast/brightness peaking/cti fb1/0 ybfout 3 dnoise reduction frame-comb filter & motion detector memory controller y/c sdram cb cr cin1 mux2 mux1 mux0 cin0 mux3 mux4 mux5 audio a mxclk a mclk a sclk a lrclk line-lock clock generator analog video in
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