公开(公告)号：US20120140818A1

公开(公告)日：2012-06-07

申请号：US13370205

申请日：2012-02-09

申请人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki ,  Kuniaki Takahashi

发明人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki ,  Kuniaki Takahashi

IPC分类号： H04N7/26

CPC分类号： H04N19/124 ,  H04N7/26244 ,  H04N7/26335 ,  H04N7/26941 ,  H04N7/50 ,  H04N19/126 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/40 ,  H04N19/44 ,  H04N19/60 ,  H04N19/61 ,  H04N19/625

摘要： An image information decoding method for decoding a bit stream in an image decoding apparatus. The decoding process includes decoding, in a decoding unit in the image decoding apparatus, the bit stream and generating a chroma component of quantized coefficients; and performing, in a dequantization unit in the image decoding apparatus, dequantization on the chroma component of quantized coefficients using a chroma quantization parameter calculated on the basis of a luma quantization parameter weighted by an addition operation.

摘要翻译： 一种用于对图像解码装置中的比特流进行解码的图像信息解码方法。 解码处理包括在图像解码装置的解码单元中对位流进行解码，生成量化系数的色度分量; 并且在所述图像解码装置的去量化单元中，使用基于通过加法运算加权的亮度量化参数计算出的色度量化参数，对量化系数的色度分量进行去量化。

公开(公告)号：US08155460B2

公开(公告)日：2012-04-10

申请号：US12346351

申请日：2008-12-30

申请人： Kazushi Sato ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Sato ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： G06K9/36

CPC分类号： H04N19/523 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176

摘要： The present invention is directed to an image information encoding apparatus, used in receiving compressed image information through network media when processing of such compressed image information is performed on storage media. A picture sorting buffer delivers information of picture type of frame Picture_type to a picture type discrimination unit. The picture type discrimination unit transmits command to a motion prediction/compensation unit on the basis of that information. The motion prediction/compensation unit generates predictive picture by using filter coefficients having the number of taps lesser than that of P picture with respect to B picture for which operation quantity and the number of memory accesses are required to more degree as compared to P picture on the basis of that command.

摘要翻译： 本发明涉及一种图像信息编码装置，其用于在对存储介质执行这种压缩图像信息的处理时通过网络媒体接收压缩图像信息。 图像分类缓冲器将帧Picture_type的图像类型的信息提供给图像类型识别单元。 图像类型识别单元基于该信息向运动预测/补偿单元发送命令。 运动预测/补偿单元通过使用相对于B图像的抽头数小于P图像的滤波器系数来产生预测图像，与B图像相比，需要更多的操作量和存储器访问次数 该命令的基础。

公开(公告)号：US20090135914A1

公开(公告)日：2009-05-28

申请号：US12340283

申请日：2008-12-19

申请人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki

发明人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki

IPC分类号： H04N7/26

CPC分类号： H04N19/109 ,  H04N7/01 ,  H04N11/042 ,  H04N11/046 ,  H04N19/105 ,  H04N19/112 ,  H04N19/124 ,  H04N19/136 ,  H04N19/139 ,  H04N19/152 ,  H04N19/16 ,  H04N19/176 ,  H04N19/186 ,  H04N19/36 ,  H04N19/44 ,  H04N19/50 ,  H04N19/51 ,  H04N19/513 ,  H04N19/523 ,  H04N19/57

摘要： In an image information encoder (10) supplied with an interlaced image in a 4:2:0 format, a color-difference signal phase correction unit (22) shifts, for motion estimation and compensation, the phase of the color-difference signal in a reference image block adaptively to a selected motion estimate mode and the value mv of vertical component in motion vector information so that the reference image block will coincide in phase of the color-difference signal with an input image block.

摘要翻译： 在以4:2:0格式提供隔行扫描图像的图像信息编码器（10）中，色差信号相位校正单元（22）将色差信号的相位移动到运动估计和补偿 参考图像块自适应于所选择的运动估计模式和运动矢量信息中的垂直分量的值mv，使得参考图像块将与色差信号与输入图像块的相位一致。

公开(公告)号：US20090103623A1

公开(公告)日：2009-04-23

申请号：US12340356

申请日：2008-12-19

申请人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki

发明人： Kazushi SATO ,  Osamu Sunohara ,  Teruhiko Suzuki ,  Peter Kuhn ,  Yoichi Yagasaki

IPC分类号： H04N7/26

CPC分类号： H04N19/109 ,  H04N7/01 ,  H04N11/042 ,  H04N11/046 ,  H04N19/105 ,  H04N19/112 ,  H04N19/124 ,  H04N19/136 ,  H04N19/139 ,  H04N19/152 ,  H04N19/16 ,  H04N19/176 ,  H04N19/186 ,  H04N19/36 ,  H04N19/44 ,  H04N19/50 ,  H04N19/51 ,  H04N19/513 ,  H04N19/523 ,  H04N19/57

摘要： In an image information encoder (10) supplied with an interlaced image in a 4:2:0 format, a color-difference signal phase correction unit (22) shifts, for motion estimation and compensation, the phase of the color-difference signal in a reference image block adaptively to a selected motion estimate mode and the value mv of vertical component in motion vector information so that the reference image block will coincide in phase of the color-difference signal with an input image block.

公开(公告)号：US07515636B2

公开(公告)日：2009-04-07

申请号：US11113299

申请日：2005-04-25

申请人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： H04B1/66

CPC分类号： H04N19/40 ,  H04N19/115 ,  H04N19/126 ,  H04N19/139 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/20 ,  H04N19/463 ,  H04N19/51 ,  H04N19/61

摘要： An image information conversion apparatus and method by which picture quality deterioration caused by conversion from inputted MPEG2 image compression information into MPEG4 image compression information to be outputted is prevented. When an I picture of an MPEG2 bit stream is to be converted into a P-VOP of an MPEG4 bit stream based on an estimated value of the complexity for each VOP, a scene change detection section detects whether or not the I picture includes a scene change. If a scene change is detected by the scene change detection section, then a GOV structure determination section determines that conversion of the I picture of the MPEG2 bit stream into a P-VOP of an MPEG4 bit stream should not be performed.

摘要翻译： 防止由输入的MPEG2图像压缩信息转换成要输出的MPEG4图像压缩信息引起的图像质量劣化的图像信息转换装置和方法。 当基于每个VOP的复杂度的估计值将MPEG2比特流的I图像转换为MPEG4比特流的P-VOP时，场景改变检测部分检测I图像是否包括场景 更改。 如果场景变化检测部检测到场景变化，则GOV构造判定部判定为不进行MPEG2比特流的P图像的MPEG图像的MPEG图像的转换。

公开(公告)号：US07088775B2

公开(公告)日：2006-08-08

申请号：US09765852

申请日：2001-01-19

申请人： Kazushi Sato ,  Kuniaki Takahashi ,  Zhu Yiwen ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Sato ,  Kuniaki Takahashi ,  Zhu Yiwen ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： H04B1/66

CPC分类号： H04N5/4401 ,  H04N7/012 ,  H04N19/132 ,  H04N19/20 ,  H04N19/40 ,  H04N19/577 ,  H04N19/587 ,  H04N21/440218 ,  H04N21/440281

摘要： An image data converting apparatus comprising an MPEG2-image data decoding section 19, a scan-converting section 20, an MPEG4-image encoding section 21, and a picture-type determining section 18. The MPEG2-image data decoding section 19 decodes input MPEG2-image compressed data in both the vertical direction and the horizontal direction by using only lower, fourth-order coefficients. The scan-converting section 20 converts interlaced-scan pixel data to sequential-scan pixel data. The MPEG4-image encoding section 21 generates MPEG4-image compressed data from the sequential-scan pixel signals. The sections 19, 20 and 21 are connected in series. The picture-type determining section 18 is connected to the input of the MPEG2-image data decoding section 19. The section 18 determines the picture type of each frame data contained in the interlaced-scan MPEG4-picture compressed data, outputs only the frame data about I/P pictures, discards the frame data about B pictures, thereby converting the frame rate.

公开(公告)号：US06950468B2

公开(公告)日：2005-09-27

申请号：US09986436

申请日：2001-11-08

申请人： Kazushi Satoh ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Satoh ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： H04N19/00 ,  H04N19/102 ,  H04N19/126 ,  H04N19/134 ,  H04N19/136 ,  H04N19/146 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/19 ,  H04N19/196 ,  H04N19/40 ,  H04N19/85 ,  H04N7/12

CPC分类号： H04N19/40 ,  H04N19/105 ,  H04N19/115 ,  H04N19/126 ,  H04N19/139 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/15 ,  H04N19/172 ,  H04N19/196 ,  H04N19/197 ,  H04N19/20 ,  H04N19/61 ,  H04N19/87

摘要： The invention provides an image information conversion apparatus and method by which picture quality deterioration caused by setting of an initial value can be prevented when code amount control in MPEG4 image coding is performed based on information extracted from MPEG2 image compression information. An initial reference quantization scale determination section determines an initial value for a reference quantization scale from predetermined MPEG2 image compression information, the number of macro blocks to be included in an MPEG4 bit stream, a code amount allocated to the first I picture of the MPEG2 image compression information stored in an information buffer, an average quantization scale and a target code amount for the first I-VOP of the MPEG4 bit stream calculated by an MPEG4 image information coding section, and then calculates an initial value for a virtual buffer occupation amount based on the determined initial value for the reference quantization scale.

摘要翻译： 本发明提供了一种图像信息转换装置和方法，在MPEG4图像编码中的代码量控制基于从MPEG2图像压缩信息中提取的信息进行时，可以防止由初始值的设置引起的图像质量恶化。 初始参考量化尺度确定部分从预定的MPEG2图像压缩信息，要包括在MPEG4比特流中的宏块的数量，分配给MPEG2图像的第一I图像的代码量确定用于参考量化尺度的初始值 存储在信息缓冲器中的压缩信息，由MPEG4图像信息编码部分计算的MPEG4比特流的第一I-VOP的平均量化尺度和目标代码量，然后计算基于虚拟缓冲器占用量的初始值 对于参考量化比例的确定的初始值。

公开(公告)号：US20050190840A1

公开(公告)日：2005-09-01

申请号：US11113295

申请日：2005-04-25

申请人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： H04N19/50 ,  G06T9/00 ,  H04N19/103 ,  H04N19/134 ,  H04N19/136 ,  H04N19/142 ,  H04N19/146 ,  H04N19/172 ,  H04N19/186 ,  H04N19/19 ,  H04N19/196 ,  H04N19/20 ,  H04N19/40 ,  H04N19/423 ,  H04N19/51 ,  H04N19/59 ,  H04N19/60 ,  H04N19/625 ,  H04N19/85 ,  H04N19/91 ,  H04N7/12

CPC分类号： H04N19/40 ,  H04N19/115 ,  H04N19/126 ,  H04N19/139 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/20 ,  H04N19/463 ,  H04N19/51 ,  H04N19/61

摘要： The invention provides an image information conversion apparatus and method by which picture quality deterioration caused by conversion from inputted MPEG2 image compression information into MPEG4 image compression information to be outputted is prevented. When an I picture of an MPEG2 bit stream is to be converted into a P-VOP of an MPEG4 bit stream based on an estimated value of the complexity for each VOP, a scene change detection section detects whether or not the I picture includes a scene change. If a scene change is detected by the scene change detection section, then a GOV structure determination section determines that conversion of the I picture of the MPEG2 bit stream into a P-VOP of an MPEG4 bit stream should not be performed.

公开(公告)号：US06888889B2

公开(公告)日：2005-05-03

申请号：US09986435

申请日：2001-11-08

申请人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Kazushi Sato ,  Kuniaki Takahashi ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： H04N19/50 ,  G06T9/00 ,  H04N19/103 ,  H04N19/134 ,  H04N19/136 ,  H04N19/142 ,  H04N19/146 ,  H04N19/172 ,  H04N19/186 ,  H04N19/19 ,  H04N19/196 ,  H04N19/20 ,  H04N19/40 ,  H04N19/423 ,  H04N19/51 ,  H04N19/59 ,  H04N19/60 ,  H04N19/625 ,  H04N19/85 ,  H04N19/91 ,  H04B1/66 ,  H04N7/12

CPC分类号： H04N19/40 ,  H04N19/115 ,  H04N19/126 ,  H04N19/139 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196 ,  H04N19/20 ,  H04N19/463 ,  H04N19/51 ,  H04N19/61

摘要： The system provides an image information conversion apparatus and method by which picture quality deterioration caused by conversion from inputted MPEG2 image compression information into MPEG4 image compression information to be outputted is prevented. When an I picture of an MPEG2 bit stream is to be converted into a P-VOP of an MPEG4 bit stream based on an estimated value of the complexity for each VOP, a scene change detection section detects whether or not the I picture includes a scene change. If a scene change is detected by the scene change detection section, then a GOV structure determination section determines that conversion of the I picture of the MPEG2 bit stream into a P-VOP of an MPEG4 bit stream should not be performed.

摘要翻译： 该系统提供了一种图像信息转换装置和方法，通过该图像信息转换装置和方法防止了从输入的MPEG2图像压缩信息转换成要输出的MPEG4图像压缩信息引起的图像质量恶化。 当基于每个VOP的复杂度的估计值将MPEG2比特流的I图像转换为MPEG4比特流的P-VOP时，场景改变检测部分检测I图像是否包括场景 更改。 如果场景变化检测部检测到场景变化，则GOV构造判定部判定为不进行MPEG2比特流的P图像的MPEG图像的MPEG图像的转换。

公开(公告)号：US06608935B2

公开(公告)日：2003-08-19

申请号：US09339690

申请日：1999-06-24

申请人： Takefumi Nagumo ,  Teruhiko Suzuki ,  Yoichi Yagasaki

发明人： Takefumi Nagumo ,  Teruhiko Suzuki ,  Yoichi Yagasaki

IPC分类号： G06K946

CPC分类号： H04N19/00 ,  G06T9/20 ,  H04N19/20 ,  H04N19/46 ,  H04N19/563 ,  H04N19/593 ,  H04N19/61 ,  H04N19/63 ,  H04N19/70

摘要： The MPEG4 is expanded to permit the use of the 4:2:2 format and the 4:4:4 format. To this end, there is provided an encoder adapted for encoding a picture in terms of a macro-block made up of a block of luminance Y and a block of chrominance Cr, Cb. The encoder includes a VOP encoding unit 3 for encoding the picture as reading of a flag (cbpc) specifying the state of encoding of the chrominance block and a flag (cbpcb, cbpcr) specifying the state of encoding of the chrominance block associated with the types of the chrominance Cb, Cr is adaptively changed responsive to a flag (chroma_type) representing the chrominance format of the picture and to the flag (cbpc) specifying the state of encoding of the chrominance block.

摘要翻译： MPEG4扩展为允许使用4：2：2格式和4：4：4格式。 为此，提供了一种编码器，其适于根据由亮度块Y和色度块Cr，Cb组成的宏块来编码图像。 编码器包括用于将图像编码为指定色度块的编码状态的标志（cbpc）的读取的VOP编码单元3和指定与类型相关联的色度块的编码状态的标志（cbpcb，cbpcr） 的色度Cb，Cr响应于表示图像的色度格式的标志（chroma_type）和指定色度块的编码状态的标志（cbpc）自适应地改变。