Patent ID: 6418163
Filing Date: 2002-07-09
Classification: H04L

Abstract:
In a variable rate communications system, a sub-system for determining, at a receiver, the data rate of a received data frame, comprising:a processor for generating a signal indicating the most likely rate of said received data frame in accordance with a predetermined hypothesis test, the predetermined hypothesis test considering characteristics of speech activity; and a decoder for receiving said most likely rate signal and for decoding said received data frame into a decoded frame of bits at said most likely rate, wherein the predetermined hypothesis test further considers a priori probability distribution of received data rates, wherein the predetermined hypothesis test further considers a predetermined sequence of data rates, and wherein the decoder sequentially decodes the received data frame according to the predetermined sequence of data rates, and wherein the received data frame has an associated encoding key, the encoding key having a probability function, and wherein the predetermined sequence of data rates is a function of the probability function of the encoding key.