公开(公告)号：US20100104027A1

公开(公告)日：2010-04-29

申请号：US12259649

申请日：2008-10-28

申请人： Jeongnam Youn ,  Yushin Cho ,  Daisuke Hiranaka

发明人： Jeongnam Youn ,  Yushin Cho ,  Daisuke Hiranaka

IPC分类号： H04N7/26

CPC分类号： H04N19/00066 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/30 ,  H04N19/61 ,  H04N19/85

摘要： A method and apparatus for preprocessing a video signal prior to its being encoded. During preprocessing, features are extracted from the video signal into feature planes which are each adaptively filtered in response to estimations of feature activity. After feature extraction the signal which remains is referred to as a “remaining signal”, which is then noise filtered to remove a substantial portion of the noise. The feature planes and remaining signal are recombined into a preprocessed output signal configured for receipt and processing by a video encoder. A video encoder receiving the preprocessed video signal can generate higher quality and/or lower bit rate encoded video than one receiving the original source video. Preprocessing according to the invention is particularly well suited for use with encoders adapted to remove temporal and/or spatial redundancy, such as those implemented according to the MPEG2/4, or AVC/H.264 standards.

摘要翻译： 一种用于在编码视频信号之前对视频信号进行预处理的方法和装置。 在预处理期间，将特征从视频信号提取到特征平面中，每个特征平面根据特征活动的估计被自适应过滤。 在特征提取之后，剩下的信号被称为“剩余信号”，然后对其进行噪声滤波以去除大部分噪声。 特征平面和剩余信号被重新组合成被配置为由视频编码器接收和处理的预处理输出信号。 接收预处理视频信号的视频编码器可以产生比接收原始源视频的视频编码视频更高质量和/或较低比特率编码视频。 根据本发明的预处理特别适合于适用于去除时间和/或空间冗余的编码器，诸如根据MPEG2 / 4或AVC / H.264标准实现的冗余。

公开(公告)号：US20110074976A1

公开(公告)日：2011-03-31

申请号：US12571070

申请日：2009-09-30

申请人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

发明人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

IPC分类号： H04N5/76 ,  G06K9/00

CPC分类号： H04N17/004 ,  G06K9/4647 ,  H04N21/44008

摘要： A method of detecting existence of visually thin lines in images is described herein. The method includes profile generation, profile analysis and deciding the existence of thin lines. The profile generation includes generating a profile in each direction of the input image. Multiple projection lines are projected along the direction and all of the pixel values along the projection lines are added and averaged to obtain a profile. The profile analysis includes determining presence of thin lines in the input image and also noticing if the direction of the thin lines is similar to that of the projection lines. At the third step, according to the analysis made, existence of thin lines in the image is decided.

摘要翻译： 这里描述了检测图像中视线细线的存在的方法。 该方法包括轮廓生成，轮廓分析和确定细线的存在。 简档生成包括在输入图像的每个方向上生成简档。 多个投影线沿着该方向投影，并且沿着投影线的所有像素值被添加并平均以获得轮廓。 轮廓分析包括确定输入图像中的细线的存在，并且还注意细线的方向是否类似于投影线的方向。 在第三步，根据分析，确定图像中细线的存在。

公开(公告)号：US20110074967A1

公开(公告)日：2011-03-31

申请号：US12570976

申请日：2009-09-30

申请人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

发明人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

IPC分类号： G06K9/36 ,  H04N5/228

CPC分类号： H04N19/152 ,  H04N19/107 ,  H04N19/115 ,  H04N19/176 ,  H04N19/63

摘要： A method of deciding a target bit rate for wavelet-based image encoding based on the wavelet coefficients is described. The target bit rate is used for maintaining a high quality image. A minimum target bit rate and a maximum target bit rate are determined. A pseudo code length corresponding to the minimum target bit rate is calculated. The pseudo code length is calculated as a function of the wavelet coefficients. The corresponding pseudo code length is calculated for the maximum target bit rate. A curve between the pseudo code length and target bit rate is derived. Slope of the curve depends on buffer fullness. Using the curve, for a given pseudo code length, an appropriate target bit rate is derived. The derived target bit rate depends on the image content, and computing resources are able to be optimally used to attain similar quality for each image block of an image.

摘要翻译： 描述了基于小波系数来确定基于小波的图像编码的目标比特率的方法。 目标比特率用于维持高质量的图像。 确定最小目标比特率和最大目标比特率。 计算与最小目标比特率对应的伪码长度。 根据小波系数计算伪码长度。 针对最大目标比特率计算相应的伪码长度。 导出伪码长度与目标比特率之间的曲线。 曲线的斜率取决于缓冲区充满度。 使用曲线，对于给定的伪代码长度，导出适当的目标比特率。 导出的目标比特率取决于图像内容，并且计算资源能够被最佳地用于为图像的每个图像块获得相似的质量。

公开(公告)号：US08792564B2

公开(公告)日：2014-07-29

申请号：US12259649

申请日：2008-10-28

申请人： Jeongnam Youn ,  Yushin Cho ,  Daisuke Hiranaka

发明人： Jeongnam Youn ,  Yushin Cho ,  Daisuke Hiranaka

IPC分类号： H04N7/26

CPC分类号： H04N19/00066 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/30 ,  H04N19/61 ,  H04N19/85

摘要： A method and apparatus for preprocessing a video signal prior to its being encoded. During preprocessing, features are extracted from the video signal into feature planes which are each adaptively filtered in response to estimations of feature activity. After feature extraction the signal which remains is referred to as a “remaining signal”, which is then noise filtered to remove a substantial portion of the noise. The feature planes and remaining signal are recombined into a preprocessed output signal configured for receipt and processing by a video encoder. A video encoder receiving the preprocessed video signal can generate higher quality and/or lower bit rate encoded video than one receiving the original source video. Preprocessing according to the invention is particularly well suited for use with encoders adapted to remove temporal and/or spatial redundancy, such as those implemented according to the MPEG2/4, or AVC/H.264 standards.

摘要翻译： 一种用于在编码视频信号之前对视频信号进行预处理的方法和装置。 在预处理期间，将特征从视频信号提取到特征平面中，每个特征平面根据特征活动的估计被自适应过滤。 在特征提取之后，剩下的信号被称为“剩余信号”，然后对其进行噪声滤波以去除大部分噪声。 特征平面和剩余信号被重新组合成被配置为由视频编码器接收和处理的预处理输出信号。 接收预处理视频信号的视频编码器可以产生比接收原始源视频的视频编码视频更高质量和/或较低比特率编码视频。 根据本发明的预处理特别适用于适用于去除时间和/或空间冗余的编码器，例如根据MPEG2 / 4或AVC / H.264标准实现的冗余。

公开(公告)号：US08203619B2

公开(公告)日：2012-06-19

申请号：US12570976

申请日：2009-09-30

申请人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

发明人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

IPC分类号： H04N5/228 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/152 ,  H04N19/107 ,  H04N19/115 ,  H04N19/176 ,  H04N19/63

摘要： A method of deciding a target bit rate for wavelet-based image encoding based on the wavelet coefficients is described. The target bit rate is used for maintaining a high quality image. A minimum target bit rate and a maximum target bit rate are determined. A pseudo code length corresponding to the minimum target bit rate is calculated. The pseudo code length is calculated as a function of the wavelet coefficients. The corresponding pseudo code length is calculated for the maximum target bit rate. A curve between the pseudo code length and target bit rate is derived. Slope of the curve depends on buffer fullness. Using the curve, for a given pseudo code length, an appropriate target bit rate is derived. The derived target bit rate depends on the image content, and computing resources are able to be optimally used to attain similar quality for each image block of an image.

摘要翻译： 描述了基于小波系数确定基于小波的图像编码的目标比特率的方法。 目标比特率用于维持高质量的图像。 确定最小目标比特率和最大目标比特率。 计算与最小目标比特率对应的伪码长度。 根据小波系数计算伪码长度。 针对最大目标比特率计算相应的伪码长度。 导出伪码长度与目标比特率之间的曲线。 曲线的斜率取决于缓冲区充满度。 使用曲线，对于给定的伪代码长度，导出适当的目标比特率。 导出的目标比特率取决于图像内容，并且计算资源能够被最佳地用于为图像的每个图像块获得相似的质量。

公开(公告)号：US08154617B2

公开(公告)日：2012-04-10

申请号：US12571070

申请日：2009-09-30

申请人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

发明人： Yushin Cho ,  Daisuke Hiranaka ,  Jeongnam Youn

IPC分类号： H04N5/228 ,  H04N7/12 ,  G06K9/36

CPC分类号： H04N17/004 ,  G06K9/4647 ,  H04N21/44008

摘要： A method of detecting existence of visually thin lines in images is described herein. The method includes profile generation, profile analysis and deciding the existence of thin lines. The profile generation includes generating a profile in each direction of the input image. Multiple projection lines are projected along the direction and all of the pixel values along the projection lines are added and averaged to obtain a profile. The profile analysis includes determining presence of thin lines in the input image and also noticing if the direction of the thin lines is similar to that of the projection lines. At the third step, according to the analysis made, existence of thin lines in the image is decided.

摘要翻译： 这里描述了检测图像中视线细线的存在的方法。 该方法包括轮廓生成，轮廓分析和确定细线的存在。 简档生成包括在输入图像的每个方向上生成简档。 多个投影线沿着该方向投影，并且沿着投影线的所有像素值被添加并平均以获得轮廓。 轮廓分析包括确定输入图像中的细线的存在，并且还注意细线的方向是否类似于投影线的方向。 在第三步，根据分析，确定图像中细线的存在。

公开(公告)号：US06438169B1

公开(公告)日：2002-08-20

申请号：US09261360

申请日：1999-03-03

申请人： Masatoshi Takashima ,  Daisuke Hiranaka ,  Eiji Ogura ,  Katsumi Tahara ,  Noriaki Oishi ,  Mikita Yasuda ,  Shinji Negishi

发明人： Masatoshi Takashima ,  Daisuke Hiranaka ,  Eiji Ogura ,  Katsumi Tahara ,  Noriaki Oishi ,  Mikita Yasuda ,  Shinji Negishi

IPC分类号： H04N1102

CPC分类号： H04N21/23406 ,  H04N7/52 ,  H04N19/46 ,  H04N21/44004

摘要： A video signal compressing method and a video signal compressing apparatus for compressing a video signal for a system in which for a synchronism between a plurality of compressed signals must be maintained. A presentation time stamp and/or a decode time stamp are multiplexed in a stream for transmission in which a video signal is compressed to generate a compressed signal. The following are generated as access unit information (AUI) for use in multiplexing the compressed data of the video signal: a picture size value, a picture type value, a repeat first field value, and a flag indicating the occurrence of a big picture.

摘要翻译： 视频信号压缩方法和用于压缩视频信号的视频信号压缩装置，其中必须维持用于多个压缩信号之间的同步的系统。 呈现时间戳和/或解码时间戳被复用在用于传输的流中，其中视频信号被压缩以产生压缩信号。 产生以下作为用于复用视频信号的压缩数据的存取单元信息（AUI）：图像尺寸值，图像类型值，重复第一场值和表示大图像的出现的标志。

公开(公告)号：US06947601B2

公开(公告)日：2005-09-20

申请号：US09862834

申请日：2001-05-22

申请人： Keisuke Aoki ,  Hirofumi Morimoto ,  Masatoshi Takashima ,  Hideyuki Narita ,  Daisuke Hiranaka ,  Yoshihiro Ishida

发明人： Keisuke Aoki ,  Hirofumi Morimoto ,  Masatoshi Takashima ,  Hideyuki Narita ,  Daisuke Hiranaka ,  Yoshihiro Ishida

IPC分类号： H04N7/14 ,  H04N7/26 ,  G06K9/36

CPC分类号： H04N7/142 ,  H04N7/147 ,  H04N19/17 ,  H04N19/30 ,  H04N2007/145

摘要： A data transmission method able to maintain the quality of a transmitted image substantially same as that of one's own image and an apparatus using the method and a data transmission system, transmitting image data accommodated in a frame of a preset frame during communication between terminals, comprising capturing an image including a target image to be transmitted, making adjustments so that the target image to be transmitted from the obtained image substantially fully fills the image frame, and compressing and transmitting the adjusted image data in the image frame.

摘要翻译： 一种数据传输方法，其能够保持发送图像的质量与本人的图像的质量基本相同，以及使用该方法和数据传输系统的装置，在终端之间的通信期间传送容纳在预设帧的帧中的图像数据，包括 捕获包括要发送的目标图像的图像，进行调整，使得要从所获得的图像发送的目标图像基本上完全填充图像帧，并且在图像帧中压缩和发送经调整的图像数据。

公开(公告)号：US06661840B1

公开(公告)日：2003-12-09

申请号：US09720467

申请日：2001-04-27

申请人： Daisuke Hiranaka

发明人： Daisuke Hiranaka

IPC分类号： H04N712

CPC分类号： H04N19/177 ,  H04N19/115 ,  H04N19/119 ,  H04N19/124 ,  H04N19/126 ,  H04N19/15 ,  H04N19/176 ,  H04N19/61

摘要： An image encoder and its processing method for compression-encoding a dynamic image at a variable encoding rate in the case of an application required to perform real-time processing. A variable bit rate (VBR) control section (22) determines a VBR control quantizing scale VBRq according to a VBR buffer value held in a VBR buffer recording section (21). A constant bit rate (CBR) control section (23) determines a CBR control quantizing scale CBRq according to an inputted maximum bit rate BRmax. A quantizing scale comparing section (25) outputs the CBRq during constant rate encoding and outputs the larger one of the VBRq and CBRq during variable rate encoding. An image compression-encoding section (24) encodes the inputted image signal at a quantizing scale outputted from the quantizing scale comparing section (25) and outputs a bit stream (S20).

摘要翻译： 一种用于在执行实时处理所需的应用的情况下以可变编码速率对动态图像进行压缩编码的图像编码器及其处理方法。 可变比特率（VBR）控制部分（22）根据保存在VBR缓冲器记录部分（21）中的VBR缓冲器值确定VBR控制量化比例VBRq。 恒定比特率（CBR）控制部分（23）根据输入的最大比特率BRmax确定CBR控制量化比例CBRq。 量化比例比较部分（25）在恒定速率编码期间输出CBRq，并在可变速率编码期间输出较大的VBRq和CBRq。 图像压缩编码部（24）以从量化比例比较部（25）输出的量化标尺对输入的图像信号进行编码，输出比特流（S20）。

公开(公告)号：US06546140B1

公开(公告)日：2003-04-08

申请号：US09437031

申请日：1999-11-09

申请人： Daisuke Hiranaka

发明人： Daisuke Hiranaka

IPC分类号： G06K936

CPC分类号： H04N19/102 ,  H04N19/149 ,  H04N19/172

摘要： A method and apparatus can determine the VBV delay from the bit rate without limiting the encoding time and raising the cost. An image compression-coding apparatus adapted to control the volume of generated codes on the basis of the occupied volume of the VBV buffer at the decoder side comprises an MPEG encoder 13 for computationally determining the cumulative value of the number of input bits of each frame and output as volume of generated information, a number of input bits generating section 16 for computationally determining the theoretical value of the number of input bits from the bit rate, a B(n) counter 15 for replacing the value of the volume of generated information by the theoretical value at the end of a number of frames when the theoretical value of the number of input bits becomes equal to an integer and a VBV delay computing section 14 for computationally determining the VBV delay on the basis of the occupied volume of the VBV buffer from the B(n) counter 15.

摘要翻译： 方法和装置可以从比特率确定VBV延迟，而不限制编码时间并提高成本。 一种图像压缩编码装置，用于根据解码器侧的VBV缓冲器的占用体积来控制生成的代码量，包括：MPEG编码器13，用于计算确定每个帧的输入比特数的累积值， 输出为生成信息量，输入比特生成部16的数量，用于从比特率计算确定输入比特数的理论值; B（n）计数器15，用于将生成信息量的值替换为 当输入比特数的理论值变为等于整数的帧数结束时的理论值，以及用于基于VBV缓冲器的占用体积来计算确定VBV延迟的VBV延迟计算部分14 从B（n）计数器15。