公开(公告)号：US07647222B2

公开(公告)日：2010-01-12

申请号：US11739562

申请日：2007-04-24

申请人： Ivan Dimkovic ,  Gian Carlo Pascutto

发明人： Ivan Dimkovic ,  Gian Carlo Pascutto

IPC分类号： G10L19/00

CPC分类号： G10L19/032 ,  G10L19/028

摘要： A method and an apparatus for encoding digital audio data with reduced bit rates, the apparatus having a provider of psycho-acoustically quantized digital audio data with a bit rate being higher than the reduced bit rate. The apparatus further has an identifier for identifying a frequency band according to a selection criterion, the selection criterion being such that an impact on the quality of the digital audio data when the data in the identified frequency band is replaced by generated noise is smaller than the impact on the quality of the digital audio data, which would arise when the data in a different frequency band is replaced by generated noise. The apparatus further has a replacer for replacing data in the identified frequency band of the digital audio data by a noise synthesis parameter.

摘要翻译： 一种用于以降低的比特率对数字音频数据进行编码的方法和装置，该装置具有心理声学量化的数字音频数据的提供者，比特率高于降低的比特率。 该设备还具有根据选择标准识别频带的标识符，该选择标准使得当所识别的频带中的数据被产生的噪声代替时对数字音频数据的质量的影响小于 影响数字音频数据的质量，当不同频段的数据被产生的噪声所取代时，数字音频数据的质量将会发生变化。 该装置还具有用于通过噪声合成参数替换所识别的数字音频数据的频带中的数据的替换器。