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    • 1. 发明申请
    • SPEECH CODER
    • 语音编码器
    • WO1997000516A1
    • 1997-01-03
    • PCT/GB1996001428
    • 1996-06-13
    • NOKIA MOBILE PHONES LIMITEDNOKIA MOBILE PHONES (UK) LTDJARVINEN, KariHONKANEN, Tero
    • NOKIA MOBILE PHONES LIMITEDNOKIA MOBILE PHONES (UK) LTD
    • G10L09/14
    • G10L19/26G10L19/04
    • A post-processor (317) and method substantially for enhancing synthesized speech is disclosed. The post-processor (317) operates on a signal ex(n) derived from an excitation generator (211) typically comprising a fixed code book (203) and an adaptive code book (204), the signal ex(n) being formed from the addition of scaled outputs from the fixed code book (203) and adaptive code book (204). The post-processor operates on ex(n) by adding to it a scaled signal pv(n) derived from the adaptive code book (204). A gain or scale factor p is determined by the speech coefficients input to the excitation generator (211). The combined signal ex(n) + pv(n) is normalised by unit (316) and input to an LPC or speech synthesis filter (208), prior to being input to an audio processing unit (209).
    • 公开了一种基本上用于增强合成语音的后处理器(317)和方法。 后处理器(317)对通常包括固定码本(203)和自适应码本(204)的激励发生器(211)导出的信号ex(n)进行操作,信号ex(n)由 添加固定码本(203)和自适应码本(204)的缩放输出。 后处理器通过向其添加来自自适应码本(204)的缩放信号pv(n)来对ex(n)进行操作。 增益或比例因子p由输入到激励发生器(211)的语音系数确定。 在输入到音频处理单元(209)之前,组合信号ex(n)+ pv(n)被单元(316)归一化并输入到LPC或语音合成滤波器(208)。