Patent ID: 6772126
Filing Date: 2004-08-03
Classification: G10L

Abstract:
A terminal for transferring a digital voice message to a communication transceiver, the terminal comprising:a central processor; a memory coupled to the central processor, the memory including operating instructions that, when executed by the central processor, control the central processor to: generate from an analog voice signal a series of digital samples organized as frames; generate from the series of digital samples a set of speech model parameters for at least one frame, the set of speech model parameters encoding the voice signal at a first vocoder rate that synthesizes a first voice quality; select a first subset of speech model parameters from the set of speech model parameters for transmission to the communication transceiver, the first subset of speech model parameters requiring a lower rate of transmission than the set of speech model parameters and synthesizing a second voice quality at the communication transceiver, the second voice quality being lower than the first voice quality; and select a second subset of speech model parameters from the set of speech model parameters in response to receiving a quality improvement request from the communication transceiver, the second subset of speech model parameters supplementing the first subset of speech model parameters to synthesize a third voice quality that is higher than the second voice quality; a transmitter, coupled to the central processor, that transmits at least one of the first subset of speech model parameters and the second subset of speech model parameters to the communication transceiver; and a receiver, coupled to the central processor, that receives the quality improvement request from the communication transceiver.