One chipset compress 8 channels video image.
Available Models:
Cards are stackable to obtain 64 channels maximum
NV4008HS 8 channels video and audio CIF(real time)
or 8 channels video and audio 4CIF (not real time, record frame about 3 frames, and preview image will loss frame)
or 8 channels video and audio DCIF (not realtime,record frame about 5 frames,and preview image will loss frame)
Features & Functions :
H.264 (MPEG-4/Part 10) video compression standard leads to high compression ratio and good video quality OggVorbis audio compression standard, with 16 kHz sampling rate and 16 kbps output bitrate.
Real-time Video and Audio compression, No frame lost
4CIF preview resolution
Support Windows2000/XP/
Setable I.B.P frame sequence
Setable video quality and bit rate
Setable brightness, contrast, saturation and hue of Video signal
Support motion detection
Support OSD, LOGO, and MASK overlay
Not support capture image
Not support double encoding
Source: netvisiondvr.com