公开(公告)号：US07211721B2

公开(公告)日：2007-05-01

申请号：US10964385

申请日：2004-10-13

申请人： Marc A. Boillot ,  Radu C. Frangopol ,  Jean Khawand

发明人： Marc A. Boillot ,  Radu C. Frangopol ,  Jean Khawand

IPC分类号： G10H1/06 ,  G10H7/00

CPC分类号： G10H7/105 ,  G10H2250/031 ,  G10H2250/485 ,  G10H2250/571 ,  G10L19/093

摘要： Systems (100 or 300) and methods (400 or 500) are provided for selecting a post-compression waveform from a post-compression waveform table (106) and supplying it to a synthesis engine (108). The post-compression waveform is based upon a set of post-compression coefficients determined by generating a frequency-domain representation of a periodic signal, the representation including at least one pre-compression frequency-domain sample (204), and performing a threshold-based compression of the pre-compression frequency-domain samples. Systems and methods also include indexing and storing (502) post-compression coefficients in a post-compression coefficient table (102), generating (506) a post-compression waveform based upon the set of post-compression coefficients, and placing (508) the post-compression waveform in the table prior to the selecting (510). The system and method also include performing (504) a read-ahead operation on a sound file before selecting the post-compression waveform, the read-ahead operation indicating the post-compression waveform to be selected and supplied to the synthesis engine.

摘要翻译： 系统（100或300）和方法（400或500）用于从后压缩波形表（106）中选择后压缩波形并将其提供给合成引擎（108）。 后压缩波形基于通过生成周期信号的频域表示而确定的一组后压缩系数，所述表示包括至少一个预压缩频域样本（204），并且执行阈值 - 预压缩频域采样的基于压缩的压缩。 系统和方法还包括在后压缩系数表（102）中索引和存储后压缩系数（502），基于所述一组后压缩系数产生（506）后压缩波形，以及将（508） 在选择之前的表中的后压缩波形（510）。 该系统和方法还包括在选择后压缩波形之前对声音文件执行（504）预读操作，所述预读操作指示要被选择并提供给合成引擎的后压缩波形。