相关实验视频
Updated: Jul 8, 2025

07:14
A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
6.6K
一个嵌套的通用侧叶片取消器用于源计算,定位和信号分离在反响场的反响场
Fan-Jie Kung1, Mingsian R Bai1
1Department of Electrical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan.
The Journal of the Acoustical Society of America
|December 15, 2023
概括
新的嵌套通用侧叶片取消器 (NGSC) 提高了阵列信号处理中的源数和定位精度. 这种方法增强了信号分离,在复杂的声学环境中性能优于现有的技术.
科学领域:
- 阵列信号处理 阵列信号处理
- 声学信号分析 声学信号分析
- 机器学习用于音频.
背景情况:
- 传统的阵列信号处理方法在反响环境中难以准确计算,定位和分离源.
- 主导源和噪声干扰使复杂声学信号的分析变得复杂.
- 现有的技术,如最小描述长度 (MDL) 和多重信号分类 (MSC) 在性能上有局限性.
研究的目的:
- 为增强阵列信号处理引入嵌套通用侧环取消器 (NGSC).
- 为了提高源数计数,到达方向 (DOA) 估计和信号分离的准确性.
- 根据已建立的基线方法评估NGSC的绩效.
主要方法:
- 使用阻断矩阵的嵌套结构来逐步消除主导源.
- 麦克风信号使用多通道加权预测错误算法进行脱声.
- 源数使用阻塞信号功率;DOA估计使用共弦相似度和金色截面搜索;信号分离使用带有过后 (LCMV-PF) 的线性约束最小偏差光束造型器.
主要成果:
- 与基线相比,NGSC实现了至少28.80%更高的源数计数精度.
- 对DOA估计的根平均平方 (RMS) 度误差与NGSC相比较低1.04°.
- 使用NGSC的LCMV-PF导致信号与扭曲比率 (SDR) 比比较的光束造型器高1.52dB.
结论:
- 拟议的NGSC在源计数,定位和信号分离方面提供了显著的改进.
- 在复杂的声学场景中,NGSC在传统方法中表现优越.
- NGSC框架为先进的阵列信号处理应用提供了强大的解决方案.
相关概念视频
Downsampling
161
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
161
Sinusoidal Sources
540
Direct current (DC) refers to an electric current that flows in a single direction, maintaining a constant polarity. This is in contrast to alternating current (AC), which periodically changes its direction and magnitude. AC forms the backbone of modern electricity transmission and distribution systems due to its efficient long-distance transmission capabilities.
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
540
Reconstruction of Signal using Interpolation
203
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
203
Linear Approximation in Frequency Domain
91
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
91
Cascaded Op Amps
639
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
639
Difference from Background: Limit of Detection
6.4K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
6.4K

