1. PC based DVRs are complete PC computer-based systems incorporating all video/audio operations (capture, multiplexing, recording and playback, display and remote video access via networking).
2. Embedded DVRs (E-DVR) use embedded firmware on chips (such as DSPs). No Windows operating system is contained.
3. Mobile DVRs are embedded systems meant specifically for use in vehicles.

Compared to PC based DVR, E-DVR system have greater stability, lower hardware and software cost, smaller mechanical size, and easier usage. Moreover, operations and settings can return to previous conditions after power loss resumes. No Computer or Mouse is Necessary with using buttons. Better compression is possible with DSP assistance.

Step Digital has developed H.264 based solutions ready for CCTV surveillance industry.