H - Electricity – 04 – M
Patent
H - Electricity
04
M
179/16, 379/3, 3
H04M 1/64 (2006.01) H04M 1/656 (2006.01)
Patent
CA 1284113
ABSTRACT OF THE DISCLOSURE Methods and devices for recording and replaying audio or voice communications are disclosed. A device according to the invent on is compatible with conventional magnetic tape loggers. Such a device is termed a message repeater, and it records and replays audio signals forming messages on a message channel, such as a telephone line or a radio channel. The message repeater includes circuits for converting the audio signals on a particular channel into corresponding digital signals and circuits for storing the digital signals. The message repeater also includes circuits for selectively recalling the signals that were stored and circuits for converting the signals that were recalled into analog audio signals. The analog audio signals may be sent to a speaker, a headset, or another recording device, such as a cassette recorder. Hence, messages on the selected message channel may be recorded and later replayed by the message repeater. Preferably, the message repeater includes a display with indications of the relative locations and lengths of the stored messages as well as a cursor or index. Furthermore, the message repeater preferably permits a selected message to be saved, thereby allowing the selected message to be replayed at the convenience of the operator. Additionally, the message repeater advantageously has fault detection circuits for determining if a fault has occurred in the other circuits. For instance, a relatively low audio frequency signal may be generated in the message repeater. This signal is converted into corresponding digital signals, which are stored and then recalled. After these signals are recalled, they are converted to an analog audio signal, which is supplied to a sensing circuit. Moreover, a predetermined pattern of bits may be stored and retrieved. The data retrieved from storage is compared to the predetermined pattern of bits to check for proper storage operation.
535814
Goldson John D.
Hoffman Wayne C.
Leung Keith K.w.
Quinn Kathleen
Dictaphone Corporation
Macrae & Co.
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