Monaural music sound separation isolates individual instrument sources from a mono-channel polyphonic mixture. The primary challenge is to separate the source partials overlapped in time-frequency regions, especially for the full overlapping cases that at least one source does not have any nonoverlapping partial. Due to the lack of effective methods to separate the sources with full overlapping partials, this paper put forward a relaxed extended common amplitude modulation (RECAM) approach to deal with the octave sound separation, one of the most difficult cases. Our strategy uses a multi-band co-processing way for each short-time partial wave segment. Extensive experiments are conducted on octave mixture samples drawn from the Iowa University Musical Instrument Database. Results confirm that our RECAM achieves the best separation performance. For nonvibrato and vibrato mixtures, the average improvement of RECAM in each measure exceeds 3dB and 2dB, respectively.

中文翻译：

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使用宽松的扩展公共幅度调制的单声道音乐八度音程声音分离

单声道音乐声音分离将单个乐器源与单声道复音混合物隔离开来。主要挑战是分离在时频区域重叠的源部分，特别是对于至少一个源没有任何非重叠部分的完全重叠情况。由于缺乏有效的方法来分离具有完全重叠部分的声源，本文提出了一种轻松的扩展公共幅度调制（RECAM）方法来处理八度音程声音分离，这是最困难的情况之一。我们的策略对每个短时分波段使用多波段协处理方式。对从爱荷华大学乐器数据库中提取的八度音阶混合样本进行了广泛的实验。结果证实我们的 RECAM 实现了最佳分离性能。