Features: H.264(MPEG-4/Part 10) video compression standard leads to high compression ration and good video quality OggVorbis audio compression standard, with 16kHZ sampling rate and 16kbps output bitrate Real-time video and audio compression, no frame lost 4CIF preview resolution Comply with PCI 2.2 standard , a PC can support up to 64 channels Support WINDOWS 2000/XP and Linux operating system Provide full SDK , demonstration with source code Provide player SDK and network SDK for PC platform . Less than 1 second delay in LAN Setable I. B.P frame sequence Setable video quality and bitrate Setable brightness , contrast , saturation and hue of video signal Support motion detection Support OSD , LOGO and MASK overlay Support watermark technology Support double encoding Merits of Adopting Hikvision H.264 Compression Board H.264 encoding has the advantage of high image quality , low bitrate and low storage requirement, especially suitable for digital video security. Hikvision H.264 compression board is the state-of-the-art video / audio compression board, which adopts H.264 ACE (ADVANCED CODE EFFICIENCY). Compared with other compression board, its advantage embodies the following aspects: Save storage space Hikvision board compression ratio is higher than those that adopt MPEG-1 or other standards. Given the same capacity of hard disk, Hikvision board leads to longer recording time, thus reduces storage costs and maintenance expenses and improves systematic reliability. Excellent image quality Hikvision board adopts variable bitrate coding. It assures constant image quality to different scene and motion picture. Even violent motion cannot bring the mosaic phenomenon. Hikvision board supports real time preview without wobble or time delay. Preeminent characters of network transmission Hikvision board adjust parameter dynamically, which is suitable to assure excellent and fluent image quality in network transmission. It supports 4CIF, DCIF, 2CIF, CIF, QCIF coding, variable bitrate and variable frame rate. This is more suitable for narrowband transmission, for instance, through PSTN??ISDN??DDN, etc. Convenient control Hikvision board??s parameter, such as image quality, frame rate, and sensitive tolera