Method and apparatus to transmit signals in a communication system
A method is provided to transmit a signal by a transmitter in a communication system. The method includes predicting a receiver noise signal received from a receiver, and increasing an intelligibility of a transmitter signal using the receiver noise signal. The transmitter signal includes a transmitter noise signal and a transmitter speech signal. The transmitter cancels the transmitter noise signal from the transmitter signal and intensifies the transmitter speech signal in consideration of the receiver noise signal.
1. A method of transmitting a signal by a transmitter in a communication system, comprising:
estimating a receiver noise signal received from a receiver; and
increasing an intelligibility of a transmitter signal including a transmitter speech signal and a transmitter noise signal using the estimated receiver noise signal,
wherein increasing the intelligibility of the transmitter signal comprises:
estimating the transmitter noise signal;
comparing the transmitter noise signal with the receiver noise signal;
decreasing the transmitter noise signal to have a value less than the receiver noise signal when the transmitter noise signal is greater than or equal to the receiver noise signal; and
comparing the receiver noise signal with the transmitter speech signal.
2. The method of claim 1 , further comprising:
increasing a sound pressure level (SPL) of the transmitter speech signal, when it is determined that the receiver noise signal is greater than or equal to the transmitter speech signal.
3. The method of claim 2 , further comprising:
estimating a first transmitter noise signal being different from the transmitter noise signal from a first transmitter speech signal indicative of the sound pressure level-increased transmitter speech signal to obtain a second analyzed transmitter noise signal;
decreasing the first transmitter noise signal to have a value less than the receiver noise signal when the first transmitter noise signal is greater than or equal to the receiver noise signal; and
comparing the receiver noise signal with the first transmitter speech signal.
4. The method of claim 3 , further comprising:
transmitting the first transmitter speech signal to the receiver when the receiver noise signal is less than the first transmitter speech signal.
5. The method of claim 3 , further comprising:
increasing a sound pressure level of the first transmitter speech signal when the receiver noise signal is greater than or equal to the first transmitter speech signal, and repeating the operations of:
estimating a first transmitter noise signal being different from the transmitter noise signal from a first transmitter speech signal indicative of the sound pressure level-increased transmitter speech signal to obtain a second analyzed transmitter noise signal;
decreasing the first transmitter noise signal to have a value less than the receiver noise signal when the first transmitter noise signal is greater than or equal to the receiver noise signal; and
comparing the receiver noise signal with the first transmitter speech signal.
6. A transmitter to transmit a signal in a communication system, comprising:
a receiver noise estimator to estimate a receiver noise signal received from a receiver; and
an increaser to increase an intelligibility of a transmitter signal including a transmitter speech signal and a transmitter noise signal using the receiver noise signal,
wherein the increaser comprises:
a transmitter noise estimator to estimate the transmitter noise signal;
a noise canceller to compare the transmitter noise signal with the receiver noise signal, and to decrease the transmitter noise signal to have a value less than the receiver noise signal when the transmitter noise signal is greater than or equal to the receiver noise signal; and
a speech enhancer to compare the receiver noise signal with the transmitter speech signal.
7. The transmitter of claim 6 , wherein:
the speech enhancer increases a sound pressure level (SPL) of the transmitter speech signal when the receiver noise signal is greater than or equal to the transmitter speech signal.
8. The transmitter of claim 6 , wherein:
the transmitter noise estimator estimates a first transmitter noise signal being different from the transmitter noise signal from a first transmitter speech signal indicative of the sound pressure level-increased transmitter speech signal and transmits the first transmitter noise signal to the noise canceller,
the noise canceller decreases the first transmitter noise signal to have a value less than the receiver noise signal when the first transmitter noise signal is greater than or equal to the receiver noise signal and transmits the second transmitter signal to the speech enhancer, and
the speech enhancer compares the receiver noise signal with the first transmitter speech signal and transmits the first transmitter speech signal to an antenna to transmit the first transmitter speech signal to the receiver when the receiver noise signal is less than the first transmitter speech signal.
9. The transmitter of claim 8 , wherein the speech enhancer increases a sound pressure level of the first transmitter speech signal when the receiver noise signal is greater than or equal to the first transmitter speech signal, and the following operations are repeated:
the transmitter noise estimator estimates a first transmitter noise signal being different from the transmitter noise signal from a first transmitter speech signal indicative of the sound pressure level-increased transmitter speech signal;
the noise canceller decreases the first transmitter noise signal to have a value less than the receiver noise signal when the first transmitter noise signal is greater than or equal to the receiver noise signal and transmits the second transmitter signal to the speech enhancer; and
the speech enhancer compares the receiver noise signal with the first transmitter speech signal.