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Description: This indeed is the core idea of MELP and is based on practical observations
where the prediction-error sequence is a combination of a pulse train with noise.
Thus, the MELP model is much more realistic than the LPC model, where the excitation
is either impulse train or noise.
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Size: 1024 |
Author: ehsan |
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Description: A block diagram of the MELP model of speech production is shown in Figure 17.1,
which is an attempt to improve upon the existent LPC model.
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Size: 1024 |
Author: ehsan |
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Description: The MELP coder depends on the computation of Fourier magnitudes the
prediction-error signal to capture the shape of the excitation pulse, which basically
are the magnitudes of the Fourier transform. These quantities are quantized and
transmitted as information on the frames. The objective is to create, on the decoder
side, a periodic sequence as close as possible to the original excitation signal.-The MELP coder depends on the computation of Fourier magnitudes the
prediction-error signal to capture the shape of the excitation pulse, which basically
are the magnitudes of the Fourier transform. These quantities are quantized and
transmitted as information on the frames. The objective is to create, on the decoder
side, a periodic sequence as close as possible to the original excitation signal.
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Size: 1024 |
Author: ehsan |
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Description: The procedure used by the FS MELP coder for Fourier magnitude calculations and
quantizations is presented next (Figure 17.3). Inputs to the procedure are the speech
data (200 samples), the LPC, and the pitch period. It is assumed that the LPC and
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Size: 1024 |
Author: ehsan |
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Description: melp na ruskom na platforme tms320vc5-melp na ruskom na platforme tms320vc5xx
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Size: 15360 |
Author: ilya |
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Description: this code for melp vocoder
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Size: 78848 |
Author: massoud |
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Description: this code for melp decoder
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Size: 572416 |
Author: massoud |
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Description: this code for melp encoder
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Size: 52224 |
Author: massoud |
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Description: melp音频编码解码算法的源代码,,广泛应用于保密通信中,算法比较复杂,有比较高的学习价值-a very useful code
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Size: 3223552 |
Author: 毛革非 |
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Description: 实现了语音采集,基于MELP改进算法的低速率声码器设计与实现-a very useful code.
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Size: 3223552 |
Author: 毛革非 |
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Description: melp 1200 2400 sources
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Size: 794624 |
Author: laff |
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Description: MELP 2.4kpbs低速率语音编码代码 实测可用 环境 VS 2012- 2.4kpbs low rate speech coding environment available in VS 2012 Code Found
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Size: 79872 |
Author: 赵月娇 |
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Description: 提出了一种新的工作于极低码率下的混合激励线性预测(MELP)声码器.该声码器结合了线性预测编码(LPC)和多带激励编码算法的优点,对算法和量化方案重新进行了设计和改造,其主要特征包括改进的基音检测算法、混合的周期脉冲和随机噪声激励、有效的线性谱频率(LSF)参数量化以及激励谱形状表示.非正式主观测试表明,由采用本算法的一个2.4 kb/s编码器所重建的语音质量略优于美国联邦标准4.8 kb/s码激励线性预测编码(CELP)所重建的语音质量.-New Mixed Excitation Linear Prediction Codec at 2.4 kb/s
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Size: 139264 |
Author: 梦转 |
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Description: 目前2.4kbps的混合激励线性预测 (MELP) 语音编码方法已经被确定为美国新的联邦语音编码标准.本文提出了一种改进的MELP语音编码方法,利用滤波器相似度和基于LPC系数分类的矢量量化技术,可以把MELP的码率降到1.7kbps以下,仍有较好的合成语音质量.-An Improved MELP Speech Coder
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Size: 53248 |
Author: 梦转 |
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Description: 在混合激励线性预测(MELP)语音编码算法中,语音帧的突变转换导致合成语音质量的下降成为一个突出问题.为解决该问题,提出一种基于过渡帧判决算法的改进MELP模型,提高了参数估计的准确度,有效实现了语音的降噪处理.-In the hybrid excitation linear prediction (MELP) speech coding algorithm, the abrupt change of the speech frame leads to the degradation of synthesized speech quality. The accuracy of the estimation, the effective realization of the voice of the noise reduction processing.
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Size: 698368 |
Author: 梦转 |
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Description: 为了提高深度模型的编码重构性能,本文为传统对比散度(Contrastive divergence,CD)添加了基于交叉熵的重构误差约束。利用改进后的算法训练了重构性深度自编码机(Reconstructive deep au-to-encoder,RDAE),并用 RDAE 替换混合激励线性预测编码(Mixed excitation linear prediction, MELP)语音编码器中 LSF 参数的矢量量化方法。测试结果表明,改进后的算法在损失一定模型似然度的条件下获得了重构性能的提升,当 RDAE 隐藏层结点设为19 bit 时,本文方法所测得的加权 LSF 距离、重构语音质量、谱失真指标在训练集和测试集上均优于25 bit 矢量量化方法,即利用本文方法改进的 MELP 编码器,在不降低语音质量的条件下,可将 MELP 编码速率从2.4 kb/s 降低至2.1 kb/s,编码速率降低了12.5 。-Improved MELP Algorithm Based on Reconstructive Deep Neural Network
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Size: 1484800 |
Author: 梦转 |
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Description: This a source that encode an audio wav file using the MELP algorithm-This is a source that encode an audio wav file using the MELP algorithm
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Size: 702464 |
Author: sroca |
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Description: ADPCM voice compression algorithm
G729A assembler after manual opti
speech coding the original proced
MELP (Mixed-Excitation Linear Pre
MP3 decoder source code and audio
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Size: 715776 |
Author: sisop
|
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