| 摘要 |
PURPOSE: An audio signal decoding method using a shaping function and a device thereof are provided to restore a fixed codebook by using the shaping function calculated on an adaptive codebook basis when frame data is lost. CONSTITUTION: When an input frame data is abnormal or a lost data, an audio signal decoding device restores a pitch(801,802). The device restores an adaptive codebook by using the restored pitch(803). The device restores a fixed codebook by using a random function(804). The device shapes the fixed codebook by using a shaping function(806). The device restores an adaptive codebook gain and a fixed codebook gain(807). |
