A very low bit rate communication system. In preferred embodiments, an
off-the-shelf module is adapted to convert a speaker's voice to text. A
processor is provided to separate the text into individual words. The
processor is programmed with a dictionary which provides pre-assigned
specific 14-bit numeric values to each word in the dictionary (words used
more frequently may be assigned shorter codes). The processor creates a
numeric stream from 14-bit numeric values and this numeric stream is then
transmitted to a receiver. Typical speech contains 4 words/second, so bit
rates as low as 50 bits/second may be achieved with this technique. At
the receiving end, the stream of received 14-bit numeric values,
representing the speaker's words, are looked up in a dictionary identical
to that at the transmitting end and the text of the words reconstructed.
Text-to-speech techniques common to the industry are then used to
regenerate the speech.