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1. 发明申请

US20100121648A1 AUDIO FREQUENCY ENCODING AND DECODING METHOD AND DEVICE 有权
标题翻译：音频编码和解码方法和装置
公开(公告)号：US20100121648A1
公开(公告)日：2010-05-13
申请号：US12615965
申请日：2009-11-10
申请人： Benhao Zhang , Heyun Huang , Tan Li , Fuhui Lin
发明人： Benhao Zhang , Heyun Huang , Tan Li , Fuhui Lin
IPC分类号： G10L21/00
CPC分类号： G10L19/025
摘要： An audio encoding method and a corresponding decoding method are provided according to the present invention. Accordingly, the pre-echo effect of the audio transient signal is eliminated and the distortion of the transient signal is mitigated. The technical solution includes performing time-domain processing on an input audio transient signal; dividing sampling points x1, x2, . . . , xN of an input frame into L segments, where N is the length of the input frame and L is an arbitrary natural number less than or equal to N; calculating an energy Ei for each segment, where i is a natural number between 1˜L; calculating an average energy E0 for each segment of the input frame; calculating a multiplying parameter λi corresponding to each segment by virtue of λi=r(bitrate)*E0/Ei, where i is a natural number between 1˜L and r(bitrate) is a bit rate related function; multiplying the sampling points of all the segments of the input frame by corresponding multiplying parameter λi, obtaining the processed sampling points x1′, x2′, . . . , xN′; and sending the multiplying parameter λi to a code stream for transportation; performing time-frequency transformation and coding on the processed sampling points x1′, x2′, . . . , xN′ and outputting to the code stream. The present invention is applicable to mobile communication.
摘要翻译：根据本发明提供一种音频编码方法和相应的解码方法。因此，消除了音频瞬态信号的预回波效应，并且缓和了瞬态信号的失真。技术方案包括对输入音频瞬态信号执行时域处理; 分割采样点x1，x2，... 。。，输入帧的xN分成L个段，其中N是输入帧的长度，L是小于或等于N的任意自然数; 计算每个段的能量Ei，其中i是1〜L之间的自然数; 计算输入帧的每个段的平均能量E0; 通过λi= r（比特率）* E0 / Ei计算与每个段对应的乘法参数λi，其中i是1〜L和r（比特率）之间的自然数是比特率相关函数; 将输入帧的所有段的采样点乘以相应的乘法参数λi，获得经处理的采样点x1'，x2'。。。，xN' 并将乘法参数λi发送到用于传送的码流; 对经处理的采样点x1'，x2'进行时频变换和编码。。。，xN'并输出到码流。本发明可应用于移动通信。

2. 发明授权

US08098952B2 Method and device for removing image noise based on the median filter 有权
标题翻译：基于中值滤波器去除图像噪声的方法和装置
公开(公告)号：US08098952B2
公开(公告)日：2012-01-17
申请号：US12615923
申请日：2009-11-10
申请人： Benhao Zhang , Xiaoguang Feng , Jing Hu , Fuhuei Lin
发明人： Benhao Zhang , Xiaoguang Feng , Jing Hu , Fuhuei Lin
IPC分类号： G06K9/40 , H03M7/00 , G06K9/00
CPC分类号： H04N5/21 , G06T5/002 , G06T5/20 , G06T2207/10024 , G06T2207/20032 , G06T2207/20192
摘要： A method and an apparatus for image denoising based on medium filter is disclosed according to the present invention. Such method and apparatus may be used to remove linear noise and random noise for the sensor, as well as the bad points in the sensor image, and to prevent over-denoising. The technical solutions includes selecting three groups of pixels from neighboring pixels of a current pixel, calculating medians Φ1, Φ2 and Φ3 for the pixels in each group; calculating a reference luminance Y: Y=Φ2+[Φ1+Φ3−2*Φ2]*h*[1−k*var], where var=Φ3−Φ1; determining whether the current pixel (cur_pixel) is a bad pixel; letting a temporary variable (tmp_data) be Φ1 if the current pixel is a bad pixel; letting a temporary variable (tmp_data) be the current pixel value (cur_pixel) if the current pixel is not a bad pixel; determining whether the current pixel is located on an edge. If the current pixel is determined to be located on the edge, the reference luminance Y is limited to a range of [tmp_data−edge_limit, tmp_data+edge_limit], the current pixel value is updated with the limited reference luminance Y and the denoising process ends. If the current pixel is determined not to be located on the edge, the value of |Y−tmp_data| and the value of avoid_over_noise are compared. If |Y−tmp_data|
摘要翻译：根据本发明公开了一种基于介质滤波器的图像去噪方法和装置。这种方法和装置可以用于消除传感器的线性噪声和随机噪声，以及传感器图像中的坏点，并防止过度去噪。技术方案包括从当前像素的相邻像素中选择三组像素，为每组中的像素计算中值Φ1，Φ2和Φ3; 计算参考亮度Y：Y =Φ2+ [Φ1+Φ3-2*Φ2] * h * [1-k * var]，其中var =Φ3-Φ1; 确定当前像素（cur_pixel）是否是不良像素; 如果当前像素是不良像素，则使临时变量（tmp_data）为Φ1; 如果当前像素不是坏像素，则使临时变量（tmp_data）为当前像素值（cur_pixel）; 确定当前像素是否位于边缘上。如果当前像素被确定为位于边缘，则参考亮度Y被限制在[tmp_data-edge_limit，tmp_data + edge_limit]的范围内，当前像素值被限制的参考亮度Y更新，并且去噪处理结束。如果当前像素被确定为不位于边缘，则| Y-tmp_data |的值并比较avoid_over_noise的值。如果| Y-tmp_data |

3. 发明申请

US20070035637A1 Method for color filter array demosaicking 审中-公开
标题翻译：滤色器阵列去马赛克的方法
公开(公告)号：US20070035637A1
公开(公告)日：2007-02-15
申请号：US11501674
申请日：2006-08-08
申请人： Xiaoguang Feng , Benhao Zhang , Jing Hu , Fu-Huei Lin
发明人： Xiaoguang Feng , Benhao Zhang , Jing Hu , Fu-Huei Lin
IPC分类号： H04N9/73
CPC分类号： H04N9/045 , G06T3/4015 , H04N2209/046
摘要： This invention provides a method of interpolating a color filter array (CFA), which combines the advantages of the interpolation method based on edge detection and the interpolation method which utilizes the original color of each CFA pixel as reference, in order to ensure that the edges of the output image are clear and there are no obvious color artifacts. The interpolation method in this invention is computationally efficient and appropriate for real-time applications, in that only a 5×5 linear interpolation template is calculated and applied for each pixel.
摘要翻译：本发明提供了一种内插滤色器阵列（CFA）的方法，其结合了基于边缘检测的内插方法的优点和利用每个CFA像素的原始颜色作为参考的插值方法，以确保边缘的输出图像清晰，没有明显的色差。本发明中的插值方法在计算上是有效的并且适用于实时应用，因为仅计算5×5线性内插模板并将其应用于每个像素。

4. 发明授权

US08463614B2 Audio encoding/decoding for reducing pre-echo of a transient as a function of bit rate 有权
标题翻译：用于减少作为比特率的函数的瞬态的前回波的音频编码/解码
公开(公告)号：US08463614B2
公开(公告)日：2013-06-11
申请号：US12615965
申请日：2009-11-10
申请人： Benhao Zhang , Heyun Huang , Tan Li , Fuhuei Lin
发明人： Benhao Zhang , Heyun Huang , Tan Li , Fuhuei Lin
IPC分类号： G10L19/02 , G10L21/02
CPC分类号： G10L19/025
摘要： An audio encoding method and a corresponding decoding method are provided. Accordingly, the pre-echo effect of the audio transient signal is eliminated and the distortion of the transient signal is mitigated. The technical solution includes performing time-domain processing on an input audio transient signal; dividing sampling points x1,x2, . . . , xN of an input frame into L segments; calculating an energy Ei for each segment; calculating an average energy E0 for each segment of the input frame; calculating a multiplying parameter λi corresponding to each segment by virtue of λi=r(bitrate)*E0/Ei; multiplying the sampling points of all the segments of the input frame by corresponding multiplying parameter λi, obtaining the processed sampling points x1′,x2′, . . . , xN′; and sending the multiplying parameter λi to a code stream for transportation; performing time-frequency transformation and coding on the processed sampling points x1′,x2′, . . . , xN′ and outputting to the code stream.
摘要翻译：提供音频编码方法和相应的解码方法。因此，消除了音频瞬态信号的预回波效应，并且缓和了瞬态信号的失真。技术方案包括对输入音频瞬态信号执行时域处理; 分割采样点x1，x2，... 。。，将输入帧的xN分成L个段; 计算每个段的能量Ei; 计算输入帧的每个段的平均能量E0; 通过lambdai = r（比特率）* E0 / Ei计算与每个段相对应的乘法参数lambdai; 将输入帧的所有段的采样点乘以相应的乘法参数lambdai，获得经处理的采样点x1'，x2'。。。，xN' 并将乘法参数lambdai发送到用于传输的码流; 对经处理的采样点x1'，x2'进行时频变换和编码。。。，xN'并输出到码流。

5. 发明申请

US20100098348A1 METHOD AND DEVICE FOR REMOVING IMAGE NOISE BASED ON THE MEDIAN FILTER 有权
标题翻译：基于中值滤波器去除图像噪声的方法和装置
公开(公告)号：US20100098348A1
公开(公告)日：2010-04-22
申请号：US12615923
申请日：2009-11-10
申请人： Benhao ZHANG , Xiaoguang Feng , Jing Hu , Fuhuei Lin
发明人： Benhao ZHANG , Xiaoguang Feng , Jing Hu , Fuhuei Lin
IPC分类号： G06K9/40
CPC分类号： H04N5/21 , G06T5/002 , G06T5/20 , G06T2207/10024 , G06T2207/20032 , G06T2207/20192
摘要： A method and an apparatus for image denoising based on medium filter is disclosed according to the present invention. Such method and apparatus may be used to remove linear noise and random noise for the sensor, as well as the bad points in the sensor image, and to prevent over-denoising. The technical solutions includes selecting three groups of pixels from neighboring pixels of a current pixel, calculating medians Φ1, Φ2 and Φ3 for the pixels in each group; calculating a reference luminance Y: Y=Φ2+[(Φ1+Φ3−2*Φ2]*h*[1−k*var], where var=Φ3−Φ1; determining whether the current pixel (cur_pixel) is a bad pixel; letting a temporary variable (tmp_data) be Φ1 if the current pixel is a bad pixel; letting a temporary variable (tmp_data) be the current pixel value (cur_pixel) if the current pixel is not a bad pixel; determining whether the current pixel is located on an edge. If the current pixel is determined to be located on the edge, the reference luminance Y is limited to a range of [tmp_data−edge_limit , tmp_data+edge_limit], the current pixel value is updated with the limited reference luminance Y and the denoising process ends. If the current pixel is determined not to be located on the edge, the value of |Y−tmp_data| and the value of avoid_over_noise are compared. If |Y−tmp_data|
摘要翻译：根据本发明公开了一种基于介质滤波器的图像去噪方法和装置。这种方法和装置可以用于消除传感器的线性噪声和随机噪声，以及传感器图像中的坏点，并防止过度去噪。技术方案包括从当前像素的相邻像素中选择三组像素，为每组中的像素计算中值Φ1，Φ2和Φ3; 计算参考亮度Y：Y =Φ2+ [（Φ1+Φ3-2*Φ2] * h * [1-k * var]，其中var =Φ3-Φ1;确定当前像素（cur_pixel）是否为坏像素; 如果当前像素是不良像素，则使临时变量（tmp_data）为Φ1;如果当前像素不是坏像素，则使临时变量（tmp_data）为当前像素值（cur_pixel）;确定当前像素是否位于如果当前像素被确定为位于边缘，则参考亮度Y被限制在[tmp_data-edge_limit，tmp_data + edge_limit]的范围内，以有限的参考亮度Y更新当前像素值，并且去噪处理结束，如果确定当前像素不位于边缘，则比较| Y-tmp_data |的值和avoid_over_noise的值，如果| Y-tmp_data |

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