video video surveillance/security applications conexants portfolio includes a comprehensive suite of semiconductor solutions for communications and consumer applications. distinguishing features ? eight high-quality ntsc/pal video decoders: - anti-alias filters - 10-bit a/ds - 5-line comb filtering - independent scaling ? eight mono audio a/ds - variable sample rates - i 2 s outputs ? flexible digital video output formats at 27, 54, and 108 mhz - byte-interleaved - line-interleaved - frame-interleaved (requires external ddr2 memory) ? pcie 1.1 x1 interface ? interface to maxim codecs for bridging of compressed data to pcie ? tiling and cascading functions (requires external ddr2 memory) ? programmable motion detection ? 48 gpio pins part number CX25858 description 8-channel audio/video decoder with integrated pcie interface 8-channel audio/video decoder with integrated pcie interface CX25858 high quality audio and video decoders for surveillance applications the CX25858 8-channel audio/video decoder with integrated pcie interface was designed for surveillance applications. the CX25858 contains eight high quality ntsc/pal video decoders with 10-bit a/ds and 5-line comb filtering, to generate the highest quality digital video output with the lowest possible noise. this creates not only the best image quality for viewing, but enables lower bitrates for compression devices using the output of the CX25858. the video decoders within the CX25858 are optimized to lock to inputs with low signal levels as well as line-locked cameras, both of which are common in surveillance systems. each video decoder may be scaled independently and the CX25858 supports bt.656 as well as a variety of other interleaved digital video output formats. the CX25858 also contains eight high-quality mono audio a/ds with i 2 s outputs. pcie bridging the CX25858 contains a pcie 1.1 compliant x1 interface. it is ideal for capture card applications in systems where eight channels of high-quality, uncompressed video must be digitized and transmitted via pcie for viewing, compression, and/or analytics. the CX25858 can downscale digital video from 4:2:2 format to 4:1:1, reducing bandwidth requirements from 16 bits per pixel to 12. additionally, the CX25858 supports the bridging of up to four channels of digital video and audio from pcie, and can output these streams over pins in bt.656 or i 2 s-style interfaces, respectively. direct-connection to multi-channel h.264 codecs the CX25858 supports byte, line, or frame-interleaved digital video outputs at 27, 54, or 108 mhz. byte and line interleaved outputs are supported entirely within the CX25858. frame-interleaved outputs require that the CX25858 interface with external ddr2 memory. the CX25858 supports i 2 s and multiplexed i 2 s audio outputs. the CX25858 contains an interface for maxim h.264 codecs that permit the CX25858 to bridge compressed data from maxim devices to the pcie bus. this simplifies the bill of materials (bom) and reduces costs in pcie systems.
? 2008 conexant systems, inc. all rights reserved. conexant and the conexant logo are registered trademarks of conexant systems, inc. all other trademarks are owned by their respective owners. although conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. this mate rial is pr ovided as is and without any express or implied w arranties , including mer chantabi lit y, f itness for a pa r ticular purpose and non-infringement . conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. additional features there are two variants of the CX25858 offered one with the external ddr2 interface, and one without the interface. when equipped with ddr2, the CX25858 supports frame-interleaved video outputs, as well as a 2x2 cif tiling mode, in which four cif images are tiled into a single d1 stream. the CX25858 may be cascaded with the cx25838 to create a 16-channel system for sending video and audio data over pcie. the CX25858 includes programmable motion detection logic, which can trigger flags or pcie interrupts when motion is detected on incoming analog video streams. the CX25858 contains 48 gpio pins, which maximize flexibility and allow customization to a variety of applications and designs. i 2 c interfaces and the maxim interface are supported via gpios. 08-2833 CX25858 block diagram video video surveillance/security applications the CX25858-1x (contains ddr2 interface) is offered in a 23mm x 23mm, 288 pin fpbga package. the CX25858-2x (no ddr2 interface) is offered in a 14mm x 14mm, 233 pin fpbga package. www.conexant.com general information: u.s. and canada: (888) 855-4562 international: 1+ (949) 483-3000 headquarters 4000 macarthur blvd. newport beach, ca 92660 doc# pbr-202315 conexant product portfolio conexants comprehensive product portfolio includes solutions for imaging, audio, video, and embedded-modem applications. analog video decoders 8x composite ntsc/pal 1 input/decoder independently scaleable bt.656/vip2.0 digital video i/o configurable: 4x bt.656 @ 27, 54 and 108 mhz; byte, line, or frame-interleaved x1 pci express phy interface data1[7:0], clk1 pci express bus 8 cvbs inputs luma-based motion detection (x8) pll broadband audio a/ds 8x mono (4x stereo) 8 mono basedband audio inputs pci express tl/dll/mac dma controller 8 downstream video dmas 4 upstream video dmas audio dmas ddr2 interface (optional) 16-bit data frame-interleaving and tiling ddr2 memory (optional) digital audio i/o i 2 s 16-bit @ 8, 16, 32, 44.1, or 48 khz; multiplex-able gpios 3x i 2 c master maxim codec host i/f interrupts data2[7:0], clk2 data3[7:0], clk3 data4[7:0], clk4 mux-able i 2 s mux-able i 2 s mux-able i 2 s mux-able i 2 s i 2 c data and control motion and board level interrupts
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