compressed speech

Compressed speech is the norm, particularly among sabras.

The alternative method, as epitomised by the National Semiconductor Digitalker chip, is that of stored compressed speech.

After all, the Voice could pipe the data you needed on fast-flow, a kind of compressed speech that was as fast (or in fact, by that time, faster) as people could read.

Various codecs exist that optimize the media stream based on application requirements and network bandwidth; some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs.