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Chapter 10. Record Section In-Depth
1. Compression, Resolution, Quality, and Speed of Video
Page 91
Chapter 10. Record Section In-Depth
In this section we will cover all aspects of record configuration, and how it effects the DVR’s
performance, storage capacity, recorded image quality and frames per second of recorded video.
1. Compression, Resolution, Quality, and Speed of Video
Video Compression
This DVR is using the H.264 compression, compression used to compact the size of the video recording
that are save to the HDD. The H.264 compression is currently being used to stream HD video in
broadcast industry and is being widely accepted as industry standard in compression. Compare to older
compression types, H.264 compression uses more complex algorithms to compress video therefore even
the TCP/IP streaming videos are adapting this H.264 compression. Compression option is not selectable,
yet it is important to understand that this DVR is using the best compression available at the time of
product creation.
Video Resolution
Our DVR currently support 3 types of video resolution possible for recording and they are resolution
measuring at 720 pixels by 480 pixels, 720 pixels by 240 pixels, and 360 pixels by 240 pixels in NTSC
format. In PAL format they are 720 pixels by 576 pixels, 720 pixels by 288 pixels, and 360 pixels by 288
pixels. Often they are referenced and marked 720X480 or D1 resolution, 720X240 or 2CIF resolution,
360X240 or CIF resolution for NTSC. Respectively in PAL standard they are referenced as 720X576 or D1
resolution, 720X288 or 2CIF resolution, 360X288 or CIF resolution.
There are two selectable standards for video NTSC or PAL. Reasons for two type of video standards are
that some countries decided to use PAL or NTSC standard for television broadcast. In CCTV environment
you must correspond to determine what type of cameras are being used and what type of display
monitor is being used. Simple rule to remember is that you should matchup equipment with one
uniform standard. If you resided in country that uses NTSC for broadcast and are using NTSC monitor,
NTSC Camera then you must choose NTSC for video standards setting for DVR unit. Even if you reside in
country that uses PAL standards some countries uses NTSC standard due to compatibility of equipments
being used. So it is very critical that you identify what types of camera, and what type of monitor will be
used for the DVR unit.