www.intersil.com techwell techwell ntsc/pal/secam video decoder for multimedia applications ntsc/pal/secam video decoder for multimedia applications techwell video decoders techwell's TW9906 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 TW9906 analog front-end is equipped with three separate analog channels that enable it to accept all three possible analog video signal standards: composite, s-video or ycbcr component video. 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 at one time and allow the software to switch between them. alternatively several combinations of composite inputs and s-video component inputs may be switched under software control. (four input channels of any format can be accommodated with but there is a the front-end contains all the necessary circuits to simplify the system design. the built-in three high quality 10-bit analog-to-digital converters (adcs) convert inputs into digital signals for processing. the TW9906 uses proprietary adaptive 4h comb filter for chroma and luma separation to achieve high video quality. the image enhancement includes horizontal and vertical peaking, cti and bcs control. 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 TW9906 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 TW9906TW9906 cropping. clock and line-locked clock output. functions can be controlled through this interface. 3x10-bit multi-standard comb filter video decoder with ycbcr component input * pin to pin with tw9909 3x10-bit multi-standard comb filter video decoder with ycbcr component input * pin to pin with tw9909 target applications target applications analog video decoder analog video decoder 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 analog inputs up to five composite video inputs four composite, one s-video or one ycbcr two composite, two s-video or two ycbcr three composite, one s-video and one ycbcr three 10-bit adcs with analog clamping circuit and anti-aliasing filter built in fully programmable static gain or automatic gain control for the y channel programmable white peak control for the y channel crt, lcd, pdp and projection tv multifunction lcd monitor (monitor tv) dvd-recorder pc tv capture card cctv digital video recorder input inputs inputs maximum of 2 s-video inputs or 2 component inputs.)
techwell TW9906 block diagram miscellaneous two wire mpu serial bus interface power-down mode typical power consumption 0.25w 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 80 pin tqpf package www.intersil.com ? 2006 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. video processing adaptive 4h comb filter 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 filter detection of level of copy protection according to macrovision standard ycbcr input supports 480i/576i and sub- sampled 480p/576p with auto-detection. 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 analog video in mux agc/cla 4-h adaptive comb filter y/c separation chroma demodulation luma/chroma processor s y nc video out p ut interface vbi slicer vbi fifo 2wire serial bus mux0 cin ( 1 ) dvalid field hsync vsync mpout vd ( 19:0 ) cin ( 0 ) sclk sdat siad0 10-bit adc u v mux vin (1)/mux4 vin ( 0 ) mux mux3 clam p 10-bit adc 10-bit adc h/v down scaler/cropping filter filter filter ybout vbi pass through clock 27 mhz pdn clkx2 clkx1 y audio clock a mxclk a mclk a sclk a lrclk intreq anti-alias filter clam p anti-alias filter anti-alias filter line-lock clock generator TW9906 3x10-bit multi-standard comb filter video decoder with ycbcr component input * pin to pin with tw9909 3x10-bit multi-standard comb filter video decoder with ycbcr component input * pin to pin with tw9909 ntsc/pal/secam video decoder for multimedia applications ntsc/pal/secam video decoder for multimedia applications
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