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1. 发明申请

US20080095276A1 METHOD AND DEVICE TO PROVIDE ARITHMETIC DECODING OF SCALABLE BSAC AUDIO DATA 有权
标题翻译：提供可扩展的BSAC音频数据的算术解码的方法和设备
公开(公告)号：US20080095276A1
公开(公告)日：2008-04-24
申请号：US11957861
申请日：2007-12-17
申请人： Kihyun CHOO , Junghoe Kim , Eunmi Oh , Changyong Son
发明人： Kihyun CHOO , Junghoe Kim , Eunmi Oh , Changyong Son
IPC分类号： G06F17/00 , H03D1/00
CPC分类号： H03M7/30 , G10L19/24
摘要： A method and device to arithmetically decode scalable bit sliced arithmetic coding (BSAC) audio data are provided. The arithmetic decoding method includes checking whether all side information of a last layer of the BSAC audio data is to be decoded, and performing BSAC smart decoding and terminating the decoding when all the side information of the last layer is not decoded, and terminating decoding of the last layer when all the side information of the last layer is decoded. The BSAC smart decoding includes checking whether a symbol to be decoded is determined regardless of data read after the truncated bitstream, continuing the decoding when decoding can be performed regardless of data read after the truncated bitstream, and determining that ambiguity occurs and terminating the decoding, when the symbol to be decoded is determined dependent on the data read after the truncated bitstream. Accordingly, byte level scalability can be provided in a MPEG-4 BSAC decoder. Even though the bitstream is truncated, the decoding termination time can be known, and additional decoding with respect to a truncated portion of the bitstream can be performed.
摘要翻译：提供了一种用于算术解码可缩放位分片算术编码（BSAC）音频数据的方法和装置。算术解码方法包括检查BSAC音频数据的最后一层的所有侧信息是否被解码，并且当最后一层的所有侧信息未解码时，执行BSAC智能解码并终止解码，并终止解码当最后一层的所有侧面信息被解码时的最后一层。 BSAC智能解码包括检查是否确定要解码的符号，而不管截断的比特流之后读取的数据如何，当可以执行解码时继续解码，而不管截断的比特流之后读取的数据如何，并且确定该模糊性并终止解码，当要解码的符号取决于在截断比特流之后读取的数据时确定。因此，可以在MPEG-4 BSAC解码器中提供字节级可扩展性。即使比特流被截断，解码终止时间可以是已知的，并且可以执行关于比特流的截断部分的附加解码。

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