Patent ID: 7653538
Filing Date: 2010-01-26
Classification: G10L

Abstract:
1. A playback apparatus for receiving data having a lower layer second stream contained in an upper layer first stream that includes a detectable header signal, the second stream containing an encoded audio signal and a private header storing attribute information for the encoded audio signal in one frame but not containing a synchronization word, decoding the encoded audio signal, and outputting audio, said playback apparatus comprising: a stream analyzing means for analyzing the first stream and detecting the header signal, analyzing the second stream based on the detected header signal, and outputting the encoded audio signal and private header address; a pre-decoding buffer memory for temporarily storing the encoded audio signal and private header output from said stream analyzing means; a decoding means for decoding the encoded audio signal input from said pre-decoding buffer memory and outputting audio; a first header analyzing means for analyzing attribute information contained in the private header of a first frame, and detecting data length information denoting the data length of the encoded audio signal following the private header; a second header analyzing means for analyzing target data of a specified length staffing from an address acquired by adding the detected data length to the address of the private header of the first frame, and determining if the target data is the attribute information contained in the private header of a second frame; and a control means for stopping audio output from said decoding means for at least the encoded audio signal of the first frame if the analyzed target data is determined to not be attribute information contained in the private header of a second frame.