January 2012 – Conexant Systems Inc., a developer for imaging, audio, embedded modem, and video surveillance applications, now introduced the CX25828, a highly flexible eight-channel video/audio decoder designed for surveillance applications. The CX25828 features eight high quality NTSC/PAL video decoders, nine audio ADCs and one audio DAC (Digital-to-Analog Converter) for audio playback or two-way communication applications. Conexant’s CX25828 video/audio decoder is suitable for CCTV DVR video surveillance systems.

The CX25828 Video-Audio Decoder system-on-chip (SoC) is the latest in a line of products from Conexant specifically designed for advanced, high-capacity DVR video surveillance products that capture and record multiple video streams simultaneously. In addition, Conexant has an industrial temperature grade version, which is ideally suited for the growing automotive market.

Conexant’s CX25828 is designed with 10-bit ADCs and 5-line comb filtering for optimal color separation, generating the highest quality digital video output with the lowest possible noise and cross-luma/cross-chroma artifacts. Additionally, the decoder is optimized to lock to inputs with low signal levels as well as line-locked cameras, both of which are commonly found in video surveillance systems. Offering extreme flexibility, the CX25828 provides bi-directional bridging of video and audio data, as well as connectivity through GPIO and I2C interfaces.

The CX25828 supports the standard ITU-R BT.656 digital video format and byte-multiplexed output at 27, 54 and 108 MHz. Each video decoder includes a motion detection and image analytical engine, features which can be used to notify host controllers to begin recording or wake from sleep during detected events.