| 摘要 |
PROBLEM TO BE SOLVED: To provide a decoding process circuit in which deterioration in output sound quality is suppressed even though an error is generated in audio data and to provide a mobile terminal device. SOLUTION: An AAC decoder 61 restores low and middle range frequency band PCM data LM from AAC data and outputs the restored PCM data LM and remaining SBR data to an SBR decoder 62. In accordance with the instruction of a control section 60, the SBR decoder 62 conducts a correcting process of the PCM data LM, up-sampling of the PCM data LM and a high frequency extending process based on the SBR data to obtain high frequency band PCM data H. The control section 60 conducts to determine whether an error is generated in the AAC data and the SBR data, and the control section 60 controls the SBR decoder 62 based on the decision result and the correction process of the PCM data LM, up-sampling of the PCM data LM and a high frequency expanding process based on the SBR data are performed. COPYRIGHT: (C)2005,JPO&NCIPI
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