Abstract: A method and apparatus are provided for generating comfort noise in a communication device. The method includes receiving a signal, scaling the signal to a preselected value, indicating whether an error occurred during transmission of the signal, and providing the scaled signal as an output signal in response to receiving the indication that the error occurred during transmission. The apparatus includes a scaler for receiving a signal and being capable of scaling the signal to a preselected value. The apparatus includes an indicator capable of indicating that an error occurred during transmission of the signal, wherein the scaled signal is provided as an output signal in response to an indication that the error occurred during transmission.

Abstract: A signal modulator includes a digital signal processor, an address buffer, a counter, and a first memory device. The digital signal processor is adapted to receive digital data at a receive sampling rate and define a code word based on a subset of the digital data. The address buffer is coupled to the digital signal processor and adapted to receive the code word and store a base address. The counter is adapted to increment an address offset at a transmit sampling rate. The transmit sampling rate is a multiple of the receive sampling rate. The first memory device has a plurality of memory locations and is adapted to receive the base address and the address offset and provide a first waveform data sample from the memory location addressed by the base address and the address offset. A method for modulating a signal includes receiving digital data at a receive sampling rate. The time interval between digital data samples defines a bit interval. A code word is determined based on a subset of the digital data.