Patent ID: 9111533
Filing Date: 2015-08-18
Classification: G10L

Abstract:
1. An audio coding device comprising: a time-to-frequency converter that performs time-to-frequency conversion on each frame of a signal in at least one channel included in an audio signal in a predetermined length of time in order to convert the signal in the at least one channel to a frequency signal; a complexity calculator that calculates a first value indicating complexity of the frequency signal for each of the at least one channel, based on a spectral power of a frequency bandwidth and a masking threshold representing a power of a lower limit frequency signal of a sound that a listener is able to hear; a bit allocation controller that: determines a second value indicating a number of bits to be allocated to each frame of audio signals for each of the at least one channel so that the second value increases as the first value increases, a coder that codes the frequency signal in each channel so that a number of available bits for each frame of coded audio signals does not exceeds the updated second value.