challenging signal

Elimination of the background noise in speech is one of the most challenging problems of speech signal processing.

剔除语音中的背景噪声是语音信号处理中具有挑战性的问题。

Single channel signal separation ( SCSS) is a fundamental and challenging research topic in signal processing field.

单通道信号分离是信号处理研究领域近年来高速发展的分支之一，是一个基本的、极富挑战性的研究课题。

Blind source separation ( BSS) is a traditional yet challenging topic in signal processing, in which the separation is performed only depends on the observed signals, without knowing source signals and the mixing channels.

盲源分离是信号处理中一个传统而又极具挑战性的课题，一般指在源信号不可测及混合系统特性未知的情况下，仅由观测信号分离出各源信号的过程。