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公开(公告)号:US20060025993A1
公开(公告)日:2006-02-02
申请号:US10520201
申请日:2003-06-18
IPC分类号: G10L21/00
CPC分类号: H04S1/007
摘要: An audio system comprises a post-processor (12) arranged to alter successive fragments of a decoded audio signal (14) to provide successive fragments of post-processed audio signal (16). A masking threshold generator (20) provides an estimate of a masking threshold ( ) for successive fragments of post-processed audio signal (16). A noise level generator (17) provides an estimate of a noise level ( ) for successive fragments of the post-processed audio signal (16). A distortion generator (17) determines a degree (D) to which the noise level exceeds the masking threshold for successive fragments of the post-processed audio signal (16). A regulator (18) controls the post-processor according to the degree to which the noise levels exceed the masking threshold.
摘要翻译: 音频系统包括后处理器(12),其被配置为改变解码音频信号(14)的连续片段以提供后处理音频信号(16)的连续片段。 掩蔽阈值生成器(20)提供对后处理音频信号(16)的连续片段的掩蔽阈值()的估计。 噪声电平发生器(17)提供后处理音频信号(16)的连续片段的噪声电平()的估计。 失真发生器(17)确定噪声电平超过后处理音频信号(16)的连续片段的掩蔽阈值的程度(D)。 调节器(18)根据噪声水平超过屏蔽阈值的程度控制后处理器。