Patent ID: 8548801

Claim:
An adaptive time/frequency-based audio encoding apparatus, comprising: a transformation & mode determination unit to divide an input audio signal into a plurality of frequency-domain signals and to select a time-based encoding mode or a frequency-based encoding mode for each respective frequency-domain signal; a time-based encoding unit, implemented by at least one processing device, to perform time-based encoding in a linear prediction coding domain by using at least a long-term prediction on a first frequency-domain signal determined to be encoded in a time-based encoding mode; a frequency-based encoding unit to perform frequency-based encoding in a frequency domain other than the linear prediction coding domain, on a second frequency-domain signal determined to be encoded in a frequency-based encoding mode; and a bitstream output unit to output encoded data, division information, and encoding mode information including the time-based encoding mode or the frequency-based encoding mode corresponding to each respective encoded frequency-domain signal.