Block Diagram (SBD) - IP Based Video Conferencing Endpoint

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Design Considerations

IP Based Video Conferencing Endpoint

Overview:
Video conferencing Conferencing Endpoints are terminals used to make point to point video-enabled calls. Video conferencing consists of an input camera and base unit interfaced to an output display. Data transmission is over IP or ISDN networks. The base unit consists of a DSP with integrated on-chip video ports to process audio and video encoding/decoding.

The core subsystems include:

Video Processor
- Performs 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
- Digitizes, demodulates, and decodes the NTSC/PAL/SECAM/S- video to be used by the video processor.
Video Encoder
- Converts digital component video signals into the analog domain for display.
Memory (FLASH & SDRAM)
- Stores executing code and data/parameters.
Audio Interface (Voice Codec)
- Interfaces the microphone/speaker and uses a Codec to digitize audio signals.
Network Interface (Ethernet PHY Transceiver)
- Transmits and receives audio and video data packets through the IP/ISDN networks.
ARM9 (or suitable GPP)
- Moderates Input/Output between the Microphone, Speaker, Keyboard and the Digital Signal Processor.