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Hass the Hi3520 chip platform as a platform to build a H.264 mixed input DVR system , from the perspective of research and development , described the design of the architecture of the whole system , use the functionality of the chip , hardware design principles , Notes , software underlying development principle . American TI Company : DM642 The DM6467 , NXP : The PNX1700 , Taiwan KWG : GM8185 Hisilicon : Hi3520 , The Ambarella : A388C chip selection , contrast . Through the analysis of the function of these chips , the cost of development of the degree of difficulty , the final selection of the Hass Hi3520 chip as the main program chip platform development . Other major Techwell's TW2864, Taiwan Accard company ATP8624, Silicon Image Company the SiI9034 chip . 4 Hi3520 chip to 16 analog signals D1 encoding as well as 16 network cameras signal decoding Hi3520 between the chips by PCI communication , the original video signal through the the Hi3520 chip video cascade interface transfer . Use two ATP8624 chip 8 SATA hard disk interface , 16-way video analog-to-digital conversion using four TW2864 chip , using the SiI9034 HDMI HD output .
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