About KAM codec

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About KAM codec (KAM compression)
High video quality/high compression core technologyspecializing on camera monitoring


At transmitting video through network, general compression method will cause missing data when exceeding the network capacity due to the attempt to transmit defined data forcibly by encoder. For this reason it is necessary to prepare very large network capacity to prevent from missing data, for the system with many cameras. As KAM is the method to request video data against client (PC for display), waits until receiving data and one request is completed, not requesting for next video, no chance for network overflow. Besides due to high compression rate the load to network is reduced remarkably. KAM is the optimum video compression method for large scale monitoring system to transmit videos by some tens - hundreds of cameras.

Main features of KAM codec

(1) Superior realtime capability
Compression / playback delay time : 100ms (less than 1/4 of MPEG)

(2) Variable bitrate method
Increasing overall compression rate maintaining detailed information by varying compression rate partially depending on video status. Best compression method for evidencing for monitoring system due to capability to transmit / record clear information
KAM (variable bitrate method)
compression image
MPEG (fixed bitrate method)
compression image

* KAM (left) increases compression rate for large blocks against less information part like sky, wall, etc. and transmits faithful fine shape of man, character in small blocks, while whole image is compressed uniformly by fixed bitrate method (right) like MPEG.


(3) 3D compression (subtraction data transmission method
Remarkable reduction of transmission / recording data volume for monitoring system for relatively less motions, TV conference, due to our own method of transmitting subtraction data only against base video
Transmission data to be small by sending subtraction data (right) from base video (left)
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KAM codec
(KAM compression)
General video codec (MPEG, etc.)
Video object Video by cameta Movies, etc.
Object video quality Evidencing quality Human eye
Feature Fixed quality Variable bitrate Variable video quality (fixed bitrate)
Compression priority Still object large object Moving object, fine object
Compression unit Variable block
(per pixel)
Fixed block unit

Comparison of data size after compression (measured by QEL)



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