Newport Beach, Calif. Conexant Systems, Inc. has introduced two media bridges targeted at PC-based video surveillance products with digital video recording (DVR) capabilities. The CX25820 and CX25821 enable multi-channel, bi-directional uncompressed digital audio and video transfers to a host computer for preview, processing, or compression via an integrated PCI Express (PCIe) interface.
The new media bridges can be used with the company's CX25853 video decoder to form a complete eight-channel, industry-standard "D1" digital video solution for real-time video surveillance DVR applications. In addition, the combination of these highly integrated devices allows product developers to reduce the previously required number of components from nine to two devices, Conexant said.
The CX25820 and CX25821 are based on a flexible architecture, and are offered with integrated bi-directional video and audio interfaces. The devices can bridge multiple ITU-R BT.656/VIP2.0 video and Inter-IC Sound (I2S) audio streams over PCIe simultaneously. For transfers originating at the host, the video interfaces can be configured in a "data-pump" mode that allows generic 8- or 16-bit data to be transferred to the add-in card. The devices can also be configured to interface with certain advanced H.264 video compression codecs, which allows compressed data to be transferred from add-in cards to the host processor.
Key video surveillance-specific features include programmable logic, which can be used to detect motion on incoming, industry-standard BT.656/VIP2.0 video streams. When this occurs, an alert is immediately sent to the host processor via the PCIe bus. The CX25820/1 media bridges also have the ability to downscale digital video from 4:2:2 format to 4:1:1, reducing the bandwidth from 16 to 12 bits per pixel. This increases the number of uncompressed video streams that can be sent over the PCIe bus.
Pricing: $9.00 for the CX25820 and $11.50 for the CX25821 in volume quantities.
Availability: Packaged in a 233-pin ball grid array (BGA), the CX25820 and CX25821 are sampling now, with volume production quantities scheduled for October 2008.
Product information: CX25820 and CX25821