Patent ID: 8886548
Filing Date: 2014-11-11
Classification: G10L

Abstract:
1. An encoding device comprising: a pitch detector which detects pitch contour information of an input audio signal; a pitch parameter generator which generates, based on the detected pitch contour information, pitch parameters that include pitch change ratios within a range including a range of the pitch change ratios corresponding to absolute pitch differences of 42 cents or larger; a first encoder which codes the generated pitch parameters; a pitch shifter which shifts pitch frequency of the input audio signal according to the pitch contour information; a second encoder which codes audio signal obtained by the shifting and output from said pitch shifter; and a multiplexer which combines the coded pitch parameters output from said first encoder and data of the audio signal output from said pitch shifter and then coded by and output from said second encoder, to generate a bitstream including the coded pitch parameter and the data, wherein said first encoder