公开(公告)号：US20160300582A1

公开(公告)日：2016-10-13

申请号：US15187464

申请日：2016-06-20

申请人： VOICEAGE CORPORATION

发明人： Tommy VAILLANCOURT ,  Milan JELINEK

IPC分类号： G10L19/26 ,  G10L25/93 ,  G10L19/08 ,  G10L21/0224 ,  G10L21/0232

CPC分类号： G10L19/26 ,  G10L19/08 ,  G10L19/12 ,  G10L21/0208 ,  G10L21/0224 ,  G10L21/0232 ,  G10L25/21 ,  G10L25/78 ,  G10L25/93

摘要： The present disclosure relates to a device and method for reducing quantization noise in a sound signal contained in a time-domain excitation decoded by a time-domain decoder. A future frame time-domain excitation is evaluated based on the decoded time-domain excitation. A concatenated time-domain excitation is produced from the decoded time-domain excitation of the time-domain excitation of the future frame and is converted into a frequency-domain excitation. A weighting mask is produced for retrieving spectral information lost in the quantization noise. The frequency-domain excitation is modified to increase spectral dynamics by application of the weighting mask. The modified frequency-domain excitation is converted into a modified time-domain excitation. The latter conversion is delay-less. In an embodiment, the weighting mask may be produced using time averaging or frequency averaging or a combination of time and frequency averaging of the frequency-domain excitation. The method and device can be used for improving music content rendering of linear-prediction (LP) based codecs.

摘要翻译： 本公开涉及一种用于减少包含在由时域解码器解码的时域激励中的声音信号中的量化噪声的装置和方法。 基于解码的时域激励来评估未来帧时域激励。 从未来帧的时域激励的解码时域激励产生级联的时域激励，并将其转换为频域激励。 产生用于检索在量化噪声中丢失的光谱信息的加权掩码。 通过应用加权掩模来修改频域激发以增加光谱动力学。 修改的频域激发被转换成修改的时域激励。 后者的转换是无延迟的。 在一个实施例中，可以使用时域平均或频率平均或频域激励的时间和频率平均的组合来产生加权掩码。 该方法和装置可用于改进基于线性预测（LP）的编解码器的音乐内容呈现。

公开(公告)号：US20180286415A1

公开(公告)日：2018-10-04

申请号：US15761895

申请日：2016-09-22

申请人： VOICEAGE CORPORATION

发明人： Tommy VAILLANCOURT ,  Milan JELINEK

IPC分类号： G10L19/008 ,  H04S1/00 ,  G10L25/21

摘要： A method and system are implemented in a stereo sound signal encoding system for time domain down mixing right and left channels of an input stereo sound signal into primary and secondary channels. Correlation of the primary and secondary channels of previous frames is determined, and an out-of-phase condition of the left and right channels is detected based on the correlation of the primary and secondary channels of the previous frames. The left and right channels are time domain down mixed, as a function of the detection, to produce the primary and secondary channels using a factor β, wherein the factor β determines respective contributions of the left and right channels upon production of the primary and secondary channels.