Patent ID: 6104991
Filing Date: 2000-08-15
Classification: G10L,H04B

Abstract:
An encoding apparatus of a telecommunications transceiver for converting an analog signal to a composite digital signal for transmission over a wireless communication channel, the encoding apparatus comprising:an analog signal characterization circuit which concurrently measures a plurality of characteristics of the analog signal to concurrently provide a plurality of characterization values:a sampling circuit which samples the analog signal to form a digital signal;a parameter generator circuit, providing a plurality of sets of encoding parameters;processor that sequentially (1) selects at least one characterization value of the plurality of the characterization values, (2) then selects a set of encoding parameters of the plurality of sets of encoding parameters, and (3) then provides the selected one set to the digital encoding circuit and provides a corresponding coding value;a digital encoding circuit which encodes the digital signal according to the selected set of encoding parameters; anda combining circuit which combines the encoded digital signal and the coding value to form the composite digital signal, whereinthe analog signal characterization circuit includes a plurality of voice characteristic measurement circuits, each voice characteristic circuit including a filter which bandpass filters the analog signal and an integrator which integrates the bandpass filtered analog signal to measure as one characterization value a signal power of the analog signal within a respective frequency band, andeach set of the plurality of sets of encoding parameters provided by the parameter generator circuit is optimized for a corresponding one characterization value.