Abstract: A narrowband video codec for generating an output stream of control, data, and error correction bits includes means for framing the outputs control and data bits into a series of sequential frames of bytes for transmission over an RF link of a controlled frequency. Each frame includes an identical sequence of bytes. Each frame of bytes includes, in sequence, two control bytes, a plurality of sequential sets of data bytes, and a plurality of error correction bytes. Each set of data bytes includes a sequence of at least one audio byte and a plurality of video bytes. At least one video byte is between each sequential audio byte. Each set of data bytes has its audio and video bytes in the same order as each other set of data bytes.

Abstract: A home videoconferencing system 100 uses a standard television receiver 16 and a camcorder 14. The video controller 112 converts an outgoing analog video signal into a compressed digital video signal; an audio controller 116 converts an outgoing analog audio signal into a compressed digital audio signal. The system controller 120 multiplexes, synchronizes and error corrects outgoing and incoming digital system signals. The digital system signals are coupled to a modem 122 for transmission and reception over analog phone lines 124.