Camera module digital video recording equipment can be divided into basic type, professional type and comprehensive type according to its functions and uses.

Maximum interval

The maximum time interval allowed between two adjacent records in the process of segmented continuous image recording.

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Total resource

The ability of a single DVR device to process (collect, compress, store, monitor, etc.) multiple video (audio) signals at the same time is usually expressed by the total number of frames per second recorded in a specific image format.

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Synchronization of video and audio

The time consistency of video and audio signals during playback is expressed by the delay time between video and audio signals of the same video and audio source.

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Pre recording before alarm

Record the visual (audio) frequency signal before responding to the alarm event.

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Word of command

A set of specific authorizations that can be set to identify logged in users and prevent abnormal access to the system.