High Quality Audio and Video Decoders for Surveillance Applications

The CX25838 eight-channel audio/video decoder was designed for surveillance applications. The CX25838 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 CX25838.

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

- I2S outputs

• Flexible digital video output formats at 27, 54, and 108 MHz

- Byte-interleaved

- Line-interleaved

- Frame-interleaved (requires external DDR2 memory)

• Tiling and cascading functions (requires external DDR2 memory)

• Programmable Motion Detection

• 48 GPIO pins