Mobile telephone having continuous recording capability

Details Mobile telephone having continuous recording capability Mobile telephone having continuous recording capability

1997-03-10

2000-02-01

Eisenzopf, Reinhard J.

Telecommunications

Radiotelephone system

Message storage or retrieval

455466, 455557, H04M 1110

Patent

active

060213256

ABSTRACT:
A mobile telephone has a receiver, a transmitter, a microprocessor and an associated memory. The memory includes a first-in-first-out (FIFO) queue and a static buffer. An audio signal carried by the mobile telephone is digitized and provided to the microprocessor. The resulting digital signal is continuously written to the FIFO queue. In response to a first command from the mobile telephone user, the microprocessor causes the contents of the FIFO queue to be transferred to the static buffer. Upon a second command from the user, the contents of the buffer are converted to an analog signal and played back over the mobile telephone's speaker.

REFERENCES:
patent: 4573140 (1986-02-01), Szeto
patent: 4672670 (1987-06-01), Wang et al.
patent: 5134717 (1992-07-01), Rasmussen
patent: 5251250 (1993-10-01), Obata et al.
patent: 5687216 (1997-11-01), Svensson
patent: 5867793 (1999-02-01), Davis

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