Video Communications System

Block Diagram (SBD) for a Video Communications System featuring a DaVinciTM Digital Media or OMAP35x Processor, analog and digital video inputs, audio I/Os, video outputs, touch panel, an Ethernet connection as well as Power over Ethernet.


Video communication endpoints are terminals used to make point-to-point video-enabled calls. Video communications essentially consists of an input video source and base unit interfaced to an output display. Additional features such as human-machine input sources (keyboard, touch panel, etc.) and Ethernet connectivity allow the user to control and transmit data with ease. Data transmission is typically over IP or ISDN networks. The base unit consists of an embedded processor with integrated on-chip peripherals and audio/video acceleration to process audio and video encoding/decoding.

The core system includes:

  • Embedded Processor - Internal host processor moderates input/output data between the microphone, speaker, keyboard, touch panel, and the Digital Signal Processor (DSP). The DSP and associated video accelerators perform real-time image capture processing, compression/decompression, color space conversion, real time display, and data packetization for data communication over the IP/ISDN networks.
  • Video Decoder (ADC) - Digitizes, demodulates, and/or decodes the analog video for the digital video multiplexer to be eventually used by the video processor.
  • Video Encoder / DACs - Converts digital component video signals into the analog domain for display.
  • Audio Interface (Voice Codec) - Interfaces the microphone/speaker and uses a codec to digitize audio signals.
  • Network Interface - Uses an Ethernet PHY transceiver to transmit and receive audio and video data packets through the IP/ISDN networks.
  • Human-machine Interface - Provides the user control of the video communications system by allowing the use of keyboard, mouse, or touch panel to manipulate the data
  • Power Management - There are typically two ways to provide power to these systems; either via an AC wall outlet or via the Ethernet port using Power over Ethernet (PoE). If PoE is used, one can provide as much as 12.95 W to the whole board. More than sufficient for this video endpoint.

Technical documents

Application notes & user guides

Application Notes (5)

Title Abstract Type Size (KB) Date Views
HTM 9 KB 24 Oct 2009 115
HTM 8 KB 02 Mar 2009 46
HTM 8 KB 03 Dec 2008 21
HTM 9 KB 18 Feb 2005 59
HTM 9 KB 03 May 2004 101

Selection & solution guides

Selection Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 5.8 MB 10 Jun 2016 20763
PDF 80 KB 18 Jan 2013 590

Product bulletin & white papers

Product Bulletin (2)

Title Abstract Type Size (MB) Date Views
PDF 245 KB 22 Jan 2013 504
PDF 199 KB 09 Nov 2012 153

White Papers (2)

Title Abstract Type Size (MB) Date Views
PDF 284 KB 29 Mar 2012 184
PDF 147 KB 29 Sep 2008 213

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