A/V outputs on the Model 4031 digital video recorder allow live video, recorded A/V or JPEG snapshots to be displayed on an external monitor. Date and time are maintained by a real-time clock with battery backup. Implementation of a complete embedded DVR takes just a power connection, an optional custom keypad, and a microSD storage device.
The board encodes analog HD (AHD, HD-TVI, HD-CVI ) with resolutions up to 1080p30 and standard 
NTSC/PAL composite video using efficient H.264 compression. Audio from the microphone or stereo line-level inputs is digitized and compressed using AAC encoding. The compressed A/V streams are multiplexed and recorded as MP4 files, with file names automatically generated using the real-time clock. Bit rates can be tailored to match application requirements and storage capacity.
The text overlay generator can locate the current date, time and other information anywhere in the video frame. The date and time overlays are automatically updated every video frame.
The DVR user interface consists of an optional user-supplied keypad working in conjunction with the board’s on-screen menus. Each keypad connector pin can be routed to any keypad switch and configured to match the control scheme of a custom keypad.
The DVR measures 48x25x10 mm, consumes 1.8 W, accepts two multiplexed composite inputs, and features available interfaces for RS-232, I2C (master), USB 2.0 (master), and keypad/GPIO.
Model 4031 is built on a flexible hardware platform which can be configured as a standalone digital video recorder or used with a computer as a compact USB-compatable analog HD (AHD, HD-TVI, HD-CVI, NTSC, PAL) video capture device Model 2231.
Sensoray, 7313 SW Tech Center Drive | Tigard, OR. 97223, www.sensoray.com
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