Comparison between other digital system and Kollector
Most of the digital recording systems available today compress the image data
using Motion-JPEG or MPEG format.
Most of the digital recording systems available today compress the image data
using Motion-JPEG or MPEG format.
Motion-JPEG format relies upon the successive display of compressed still JPEG
files, It originally used to create the special effects of movies and then was
adopted to the security field owing to the merit that it can get capture a clear still
image. However, Motion-JPEG format lacks the efficiency of data compression
especially at the situation where there is motion, due to large file sizes. A typical
file size for a single image is approx 15~18k bytes for mediocre resolution.
Meanwhile, MPEG format analyzes current movements and restore the images
with pre and post image capture. That is, if any movement occurred, MPEG
format compares adjacent frames and saves only different part of image from
previous frame. Under normal security circumstances to watch specific area
continuously, MPEG algorithm is much more efficient than Motion-JPEG due to
smaller file sizes. However, MPEG files require a uniform number of pixels as a
requirement, therefore, it is difficult to get the clear still images during high-activity
recording, as images become pixilated.
To make up for above disadvantages, Vicon Industries has developed a new
algorithm-Enhanced MPEG1. Kollector format allows you to get the high quality
images including clear still images during high-activity recording through
enhanced compression efficiency and adjusting number of bits to very low file
sizes. These amount to a dynamic range of between 35 to 6,000 bytes, a fraction
of all other known compression schemes, at a resolution of over 280 HTVL,
Algorithm Motion-JPEG MPEG
Kollector
Bit Rate
Variable Fixed Variable
Still Image
High Quality Low Quality High Quality
File Size
12-15 KB 6~7 KB
0~4 KB
Horizontal TV Lines
180HTVL 180HTVL
280~320HTVL
