Multiplex Mode

What Is Multiplex Mode?

ANPR multiplex mode is a special type of number plate recognition, with which the multiplex mode license allows licensing of four media channels.

As opposed to a full ANPR license, the licensed multiplex channels are not monitored and evaluated continuously, rather only a certain number are monitored.

As it can take a certain amount of time until a channel is activated, the multiplex mode license is primarily suitable for stopped traffic, i.e. barrier control or similar applications.

How Does Multiplex Mode Work?

The number of channels determines the number of multiplex slots that perform the actual evaluation. For up to four media channels each, a multiplex slot is made available. 5 channels require two slots, as would 8 channels.

The maximum number of slots is 16, corresponding to 64 media channels. If more than 64 channels are to be licensed, then only 16 slots are made available for evaluation. The performance remains at the level of 16 slots.

A media channel in the multiplex mode is different from a channel with a full license because processing is constantly interrupted at intervals due to the other channels, meaning that no pictures are evaluated for certain periods of time.

The channels alternate every second, meaning that the live stream of the current channel is stopped and the next channel is switched on. The channel that has been interrupted then gets back into the waiting line. This cyclical alternation makes it possible to evaluate a channel every four seconds.

The use of multiplex mode requires corresponding settings for the program: For one, the video sources must supply a sufficient number of pictures; the picture rate should not be under 5 pictures/second. Also, the Setup Parameter must be modified using the Provide Result After option. The number of intermediate results must be selected so that there is a result within the analysis time (approximately 1 second).

How Do I Setup Multiplex Mode?

If you have a multiplex mode license, then you will see four ANPR licenses in the license management, which you can distribute to any of the media channels. Send the modified settings to the server and configure the parameters. ANPR multiplex mode is then operational.