Communications using wideband terminals
First Claim
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1. A method for transmitting wideband speech signals over a narrowband communication system, comprising:
- generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal;
puncturing the narrowband digital signal by inserting the plurality of data packets carrying the wideband speech signal into the narrowband digital signal;
transmitting the punctured narrowband digital signal over the narrowband communication system to a second base station;
separating the narrowband digital signal from the plurality of data packets at the second base station; and
forwarding only the plurality of data packets to a second remote station.
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Abstract
A call setup procedure is presented to permit vocoder bypass, which will allow the transmission of wideband speech packets between wideband terminals over narrowband transmission constraints. In addition, methods and apparatus are presented that allow the conversion between a wideband tandem-free operation, a narrowband tandem-free operation, and a standard tandem operation.
18 Citations
35 Claims
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1. A method for transmitting wideband speech signals over a narrowband communication system, comprising:
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generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal; puncturing the narrowband digital signal by inserting the plurality of data packets carrying the wideband speech signal into the narrowband digital signal; transmitting the punctured narrowband digital signal over the narrowband communication system to a second base station; separating the narrowband digital signal from the plurality of data packets at the second base station; and forwarding only the plurality of data packets to a second remote station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for transmitting wideband speech signals over a narrowband communication network, comprising:
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means for generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal; means for puncturing the narrowband digital signal by inserting the plurality of data packets carrying the wideband speech signal into the narrowband digital signal; means for transmitting the punctured narrowband digital signal over the narrowband communication network to a second base station; means for separating the narrowband digital signal from the plurality of data packets at the second base station; and means for forwarding the plurality of data packets to a second remote station. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for transmitting wideband speech signals over a narrowband communication system, comprising:
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generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal; puncturing the narrowband digital signal with the plurality of data packets carrying the wideband speech signal; transmitting the punctured narrowband digital signal over the narrowband communication system to a second base station; separating the narrowband digital signal from the plurality of data packets at the second base station; and forwarding only the plurality of data packets to a second remote station, wherein generating the narrowband digital signal comprises; decoding the plurality of data packets to recover the wideband speech signal; generating a narrowband speech signal from the wideband speech signal; and digitizing the narrowband speech signal.
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27. A system for transmitting wideband speech signals over a narrowband communication network, comprising:
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means for generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal; means for puncturing the narrowband digital signal with the plurality of data packets carrying the wideband speech signal; means for transmitting the punctured narrowband digital signal over the narrowband communication network to a second base station; means for separating the narrowband digital signal from the plurality of data packets at the second base station; and means for forwarding the plurality of data packets to a second remote station, wherein means for generating the narrowband digital signal comprises; means for decoding the plurality of data packets to recover the wideband speech signal; means for generating a narrowband speech signal from the wideband speech signal; and means for digitizing the narrowband speech signal.
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28. A method of creating a narrowband digital signal containing data packets carrying a wideband speech signal in a communications system, comprising:
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generating said narrowband digital signal having 8-bit pulse code modulated (PCM) symbols; and puncturing the narrowband digital signal by inserting, in a psuedo-random basis, a plurality of data packets containing said wideband speech signal into the least significant bits (LSB) of a mantissa value portion of the PCM symbols.
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29. A method of encoding wideband speech signal information for compatibility with a narrowband communication system, comprising:
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generating a narrowband digital signal at a base station from a plurality of data packets received from a remote station, wherein the plurality of data packets carry a wideband speech signal; and puncturing the narrowband digital signal by inserting the plurality of data packets carrying the wideband speech signal into the narrowband digital signal. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification