Method and apparatus for compressing and transmitting ultra high speed data
First Claim
1. A compression system in a telecommunications device for receiving a plurality of telephone signals having voice signals or data signals or a combination of both, comprising:
- a digital signal processor that comprises a compression selector processor configured to receive a telephone signal, including a monitor and a control unit, wherein the monitor is configured to detect a data signal and to inform the control unit of the presence of the data signal, whereby the control unit identifies a speed type of the detected data signal by its characteristic modem answer tones; and
a plurality of codecs, including a first codec for voice signal compression coding and decoding, and a second codec for data signal compression coding and decoding; and
a channel forming processor configured to perform dynamic timeslot allocation of the data signals and the voice signals for transmitting each of the telephone signals on a respective communication channel, wherein each communication channel is formed on at least one transmit radio frequency (RF) carrier, each RF carrier having a plurality of information slots and at least one of the information slots is assigned to one of the telephone signals;
whereby the control unit initiates a set-up of a communication channel by sending a signal to the channel forming processor and the control unit selects which codec will process the voice compression and the data compression coding and decoding.
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Abstract
Voiceband compression techniques are employed in order to enable an RF telecommunications base station to accommodate data signals of high speed voiceband modems and FAX machines. An Ultra-High Speed Codec supports voiceband modem and FAX transmissions up to 14.4 kb/s and operates using four 16-phase RF slots. Because these codecs transmit information over several RF slots which can be contiguous, the slots within RF communication channels are dynamically allocated. The Dynamic Time slot/Bandwidth Allocation feature detects and monitors the data transmission and forms a data channel from the necessary number of slots.
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Citations
7 Claims
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1. A compression system in a telecommunications device for receiving a plurality of telephone signals having voice signals or data signals or a combination of both, comprising:
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a digital signal processor that comprises a compression selector processor configured to receive a telephone signal, including a monitor and a control unit, wherein the monitor is configured to detect a data signal and to inform the control unit of the presence of the data signal, whereby the control unit identifies a speed type of the detected data signal by its characteristic modem answer tones; and
a plurality of codecs, including a first codec for voice signal compression coding and decoding, and a second codec for data signal compression coding and decoding; and
a channel forming processor configured to perform dynamic timeslot allocation of the data signals and the voice signals for transmitting each of the telephone signals on a respective communication channel, wherein each communication channel is formed on at least one transmit radio frequency (RF) carrier, each RF carrier having a plurality of information slots and at least one of the information slots is assigned to one of the telephone signals;
whereby the control unit initiates a set-up of a communication channel by sending a signal to the channel forming processor and the control unit selects which codec will process the voice compression and the data compression coding and decoding. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification