Patent ID: 6778649
Filing Date: 2004-08-17
Classification: H04Q,H04R

Abstract:
A portable CODEC for transmitting high quality audio signals over a standard telephone line having a limited bandwidth and maximum transmission rate, said portable CODEC comprising:a memory within a housing and storing a lossy audio compression routine; an encoder within a housing and including a program to convert an entire audio input signal to a digital input signal in a single encoding process at a sampling rate and encode said digital input signal based on said lossy compression routine stored in memory to produce an encoded digital signal having a compression ratio with respect to said audio input signal; an analog modem within a housing and establishing a connection with, and a transmission rate for, a standard telephone line of a telephone network, said modem converting said encoded digital signal to an encoded analog output signal and outputting said encoded analog output signal at said transmission rate established by said analog modem along the standard telephone line through the telephone network; and a processor within a housing and enabling said analog modem to output said encoded analog output signal at a transmission rate that does not exceed a predetermined transmission rate of the standard telephone line.