| 摘要 |
A signal decoding apparatus preventing substantial noise from being produced when transmission error occurs during decoding of scalable-coded information. In this signal decoding apparatus, a coded information operation section ( 601 ) performs error detection for base layer coded information, first enhancement layer coded information and second enhancement layer coded information using transmission error detection bits. A decoding operation control section ( 602 ) performs ON/OFF control of control switches ( 606, 607 ) in accordance with pattern information indicating error detection results and bit rate patterns, and controls the sampling frequencies of sampling frequency adjustment sections ( 608, 609 ). A base layer decoding section ( 603 ) , first enhancement layer decoding section ( 604 ) and second enhancement layer decoding section ( 605 ) perform decoding of coded information or frame loss compensation processing, depending on error detection results and bit rates. Sampling frequency adjustment sections ( 608, 609 ) adjust the sampling frequency of the decoded signal.
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