Patent ID: 7792668
Filing Date: 2010-09-07
Classification: G10L,H04R,H04S

Abstract:
1. A method of decoding an audio signal, comprising: receiving, in a computer-readable medium including one of non-volatile medium, volatile medium, transmission medium and combinations thereof, an audio signal including at least one frame, the frame comprising at least one time slot and at least one parameter set; extracting, by one or more processors, a number of time slots and a number of parameter sets from the audio signal to identify time slot information, the time slot information indicating a time slot to which a parameter set is applied, based on instructions received from the computer-readable medium; determining, by one or more processors, a bit length of time slot information, the bit length being variable according to the number of time slots, the number of parameter sets and previous time slot information associated with a previous parameter set, based on instructions received from the computer-readable medium; extracting, by one or more processors, the time slot information based on the bit length, based on instructions received from the computer-readable medium; and decoding, by one or more processors, the audio signal by applying the parameter set to the time slot corresponding to the time slot information, based on instructions received from the computer-readable medium, wherein the number of time slot information is equal to the number of parameter sets and the time slot information includes an absolute value for indicating a time slot to which a first parameter set is applied or a difference value for indicating a time slot to which a following parameter set of the first parameter set is applied, and wherein the absolute value is determined within a first maximum range, the first maximum range being calculated using the number of parameter sets and the number of time slots, and wherein the difference value is determined within a second maximum range, the second maximum range being calculated according to the previous time slot information.