Compressing Approaches In An IP Network Camera
With the increased popularity of an IP network camera for inspection, its use is quickly growing. However, the only problem seen in their use is keeping and moving video data, which is enormous in size.
The video content that is appeared while controlling via an IP network camera possesses lots of information. Compressing helps in reduction in size of those files, which helps in conserving them without strain. The most largely used tools for compressing such video content are MPEG-4 and MJPEG.
MJPEG (Motion JPEG)
This compressing tool could grasp image at the rate of up to 30 frames in a second in an IP network camera. Every MJPEG frame is a complete JPEG image. Each frame if compressed as an individual image can give improved picture clarity. Yet, as compared to MPEG4, its disk space for keeping and conducting band for transmission are more in MJPEG for video camera surveillance.
MPEG-4
Moving Picture Experts Group (MPEG) is an organization, that has founded the standards for this format. In MPEG4, a very small part of video frames is applied for a complete image. In other frames, just the differences between the new frame and the old one are passed instead of the whole image. The basic idea behind this technique is that most frames are alike to the ones promptly before or after them. This means that every essential and different frame gets kept but with lesser conducting band and little storing space.
The other difference between MJPEG and MPEG4 is that the latter has poorer image quality than MJPEG.
MJPEG for Video Camera Surveillance
Many models of IP network camera surveillance systems are MJPEG connected. Nevertheless, additional interesting information MPEG4 has refined compressing quality, which results in lesser storage, but it also produces weaker picture quality as well. Better image quality delivered by MJPEG makes it a best-selling option in an IP network camera. It can be interesting, MJPEG is as well less complex than the other compression methods. If you are eager to look for a frame in MPEG4 then you originally need to find the reference frame according to which modifications in other frames were made. This issue is not encountered in a MJPEG version since one can immediately retrieve the frame needed in a short time. Therefore, MJPEG is quick and easy to apply.
MJPEG also produces a better degradation in passband together with a superior level of image clearness and quality which is quite essential in camera surveillance applications.
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Article author: Nino Plevnik Source: http://freearticlesdirect.com
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