首页>
外国专利>
EFFICIENT IMPLEMENTATION OF ANALYSIS AND SYNTHESIS FILTERBANKS FOR MPEG AAC AND MPEG AAC ELD ENCODERS/DECODERS
EFFICIENT IMPLEMENTATION OF ANALYSIS AND SYNTHESIS FILTERBANKS FOR MPEG AAC AND MPEG AAC ELD ENCODERS/DECODERS
展开▼
机译：MPEG AAC和MPEG AAC ELD编码器/解码器的分析和综合筛选的有效实施
展开▼
页面导航
摘要
著录项
相似文献
摘要
An encoder may include a core MDCT filterbank that can be used to implement an advancedaudio coding (AAC) algorithm, an AAC-enhanced low delay (ELD) algorithm or bothalgorithms. For the AAC algorithm, a sequence of input samples is sent directlyto the MDCT filterbank to obtain a sequence of output samples. For the AAC-ELDalgorithm, the signs of input samples of the sequence of input samples are inverted,the MDCT analysis filterbank is applied to the sign-inverted sequence of inputsamples to obtain a sequence of output samples, the order of the sequence of outputsamples is reversed, and the signs of alternating output samples of the sequenceof output samples are inverted. Similarly, a decoder may include a core IMDCTsynthesis filterbank that can be used to implement AAC-ELD or both AAC and AAC-ELDalgorithms. The steps for the decoder are merely the reverse of the encoder.
展开▼
