Patent ID: 9240192
Filing Date: 2016-01-19
CPC Classification: G10L

Claim Text:
1. An audio/speech encoding apparatus, comprising: a band splitting section that splits a spectrum of input signal to a plurality of sub-bands; a vector quantization section that quantizes spectral coefficients in each sub-band; a spectral analysis section that splits the spectrum to null vectors region and non-null vectors region by analyzing on a series of indications of sub-bands generated by vector quantization; and a parameter encoding section that converts the series of indications for null vectors in the null vector region to an indication of null vectors region and a parameter which represents the ending position of the null vectors region, wherein the parameter encoding section comprises: a first parameter encoding section that converts the series of indications for null vectors in the null vector region to an indication of null vectors region and a parameter which represents the ending position of the null vectors region; a reversing section that reverses the series of indications; a second parameter encoding section that converts the reversed series of indications for null vectors; and a selection section that selects between the first parameter encoding section and the second parameter encoding section based on which consumes less bits; and wherein audio/speech is encoded in accordance with the selection by the selection section.