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DVR and DVS

Block diagram (SBD) for a Digital Video Recorder and Digital Video Server for HD video surveillance featuring video decoders and audio codecs which allows for storage of data, and enables remote access via TCP/IP networks.

Block Diagram

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Audio Codec Clock Driver Real-Time Clock USB Protection 10/100/1000 PHY RS-232 Logic AC Adaptor LCD Backlight USB Power Low-Noise Analog Memory Power Memory Power Core Power Digital System Power Embedded Processor Video Display Processor Bus Switch Temp Sensor Four Video Input Amplifiers Four Video Input Amplifiers Four Video Input Amplifiers Four Video Input Amplifiers Video Amp Video Decoder

Design Considerations

A digital video recorder (DVR) and digital video server (DVS) are appliances used in video surveillance. These appliances take the analog video signals from multiple analog surveillance cameras and digitize them. A processing engine encodes the video streams in digital formats such as H.264, motion JPEG, MPEG-4 or proprietary codecs to allow for data storage or transmission.

While the DVR is designed to store and view this video stream locally, the DVS sends the encoded video to the larger security network using the TCP/IP protocol. Higher performance systems also have video content analysis (VCA) capabilities allowing for the automatic detection of motion, crossing of virtual fences, etc.

DVRs and DVSs are used to upgrade existing security systems, which are based on analog surveillance cameras. Replacing tape-based VCRs, the DVR/DVS automates the storage of surveillance data and enables remote access to surveillance installations via TCP/IP networks. DVRs/DVSs typically have 4-, 8- or 16-input channels. With further integration, the channel count will increase to 32, 64 and beyond.

With the advent of IP cameras, systems that accept both analog and digital formats are advantageous as the installed analog camera market base still dominates. For this reason, Hybrid DVRs are available today. These appliances are versatile video recording devices that also must have the capability to perform storage and VCA functions.

Application Notes

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Selection and Solution Guides

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Tools and Software

Name Part # Company Software/Tool Type
Code Composer Studio Integrated Development Environment (IDE) - v4.x CCSTUDIO Texas Instruments Code Composer Studio(TM) IDE
DM6467 Digital Video Evaluation Module TMDSEVM6467 Texas Instruments Development Boards/EVMs
TMSDM365 Digital Video Evaluation Module TMDXEVM365 Texas Instruments Development Boards/EVMs

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