Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1996-12-04
1997-09-09
Blum, Russell W.
Multiplex communications
Communication over free space
Combining or distributing information via time channels
370466, 370473, 370476, 370525, 370526, 455466, H04J 312
Patent
active
056663579
ABSTRACT:
The present invention relates to a system and method for sending and receiving digital signals in a voice communication system. The system includes a data buffer, a tone detector, a speech encoder, and a transmitting unit. The data buffer receives and stores a digitized signal including voice band tone data and speech data. The tone detector detects the voice band tone data and generates at least one tone packet containing data indicative of the voice band tone data. The speech encoder encodes the speech data into a plurality of compressed speech packets. The transmitting unit in communication with the tone detector and the speech encoder transmits a packet message including tone packets and speech packets over an RF channel. The present invention also relates to a receiver including a speech decoder and a tone generator. The speech decoder decompresses speech packets to generate a digitized speech signal. The tone generator detects tone packets and generates a digitized DTMF tone signal from data contained in the tone packet. The present invention also relates to a method of encoding a digital signal. The method includes the steps of receiving the digital signal having a speech component and a digit component, detecting digit information from the digit component, generating a tone packet signal and a speech packet signal, and generating a digital output signal including the tone packet signal and the speech packet signal. The tone packet signal includes the digit information, and the speech packet signal is generated by compressing the speech component.
REFERENCES:
patent: 4677656 (1987-06-01), Burke et al.
patent: 5121391 (1992-06-01), Paneth et al.
patent: 5392348 (1995-02-01), Park et al.
Blum Russell W.
Denson-Low Wanda
Hughes Electronics
Whelan John T.
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