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：US08351501B2

公开(公告)日：2013-01-08

申请号：US13370174

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： H04B1/66

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 decoding method is for decoding a bit stream in an image decoding apparatus. The method includes receiving the bit stream and a weight parameter that is added to a luma quantization parameter by an addition operation. The method also includes decoding, in a decoding unit in the image decoding apparatus, the bit stream and generating a chroma component of quantized coefficients. In addition, the method includes performing, in a dequantization unit in the image decoding apparatus, dequantization on the chroma component of quantized coefficients using the chroma quantization parameter calculated on the basis of a luma quantization parameter weighted by the weight parameter.

摘要翻译： 图像解码方法是对图像解码装置中的比特流进行解码。 该方法包括通过加法运算来接收比特流和加权参数，该加权参数被加到亮度量化参数。 该方法还包括在图像解码装置的解码单元中解码比特流并生成量化系数的色度分量。 此外，该方法包括在图像解码装置的去量化单元中，使用基于由权重参数加权的亮度量化参数计算的色度量化参数，对量化系数的色度分量进行逆量化。

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：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：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：US20120141024A1

公开(公告)日：2012-06-07

申请号：US13370094

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： G06K9/36

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 encoding method for encoding an image in an image encoding apparatus. The encoding method includes: performing, in a quantization unit in the image encoding apparatus, quantization on a chroma component of transform coefficients using a chroma quantization parameter calculated on the basis of a luma quantization parameter weighted by an addition operation that adds a weight parameter; encoding, in an encoding unit in the image encoding apparatus, a chroma component of quantized coefficients and generating a bit stream; and transferring the bit stream and the weight parameter.

摘要翻译： 一种用于对图像编码装置中的图像进行编码的图像编码方法。 编码方法包括：在图像编码装置的量化单元中，使用基于通过添加权重参数的加法运算加权的亮度量化参数计算的色度量化参数，对变换系数的色度分量进行量化; 在图像编码装置的编码单元中编码量化系数的色度分量并生成比特流; 并传送比特流和权重参数。

公开(公告)号：US20120140817A1

公开(公告)日：2012-06-07

申请号：US13370174

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 decoding method for decoding a bit stream in an image decoding apparatus. The decoding process includes receiving the bit stream and a chroma quantization parameter calculated on the basis of a luma quantization parameter weighted by an addition operation; 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 the 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解码方法。 解码处理包括接收比特流和基于通过加法运算加权的亮度量化参数计算的色度量化参数; 在所述图像解码装置的解码单元中解码所述比特流并生成量化系数的色度分量; 以及在所述图像解码装置的去量化单元中，使用根据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：US08139636B2

公开(公告)日：2012-03-20

申请号：US12620431

申请日：2009-11-17

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： H04B1/66

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 compressed image information in an image decoding apparatus, which has been coded via a process including dividing an input image signal into blocks, performing an orthogonal transform on the blocks on a block-by-block basis, and quantizing resultant orthogonal transform coefficients. The decoding process includes performing, in a dequantization unit in the image decoding apparatus, dequantization such that a quantization parameter is weighted by an addition operation that adds the weight by addition, and the dequantization is performed on each chroma and luma component of the quantized coefficients using quantization step sizes, said luma component being weighted by the quantization parameter; and performing, in a transform unit in the image decoding apparatus, an inverse orthogonal transform.

摘要翻译： 一种用于对图像解码装置中的压缩图像信息进行解码的图像信息解码方法，所述图像解码装置已经通过包括将输入图像信号分割为块的处理进行编码，并且逐块地对块执行正交变换， 得到正交变换系数。 解码处理包括在图像解码装置的去量化单元中进行去量化，使得通过加法加权的加法运算对量化参数进行加权，并且对量化系数的每个色度和亮度分量执行去量化 使用量化步长，所述亮度分量由所述量化参数加权; 并且在图像解码装置的变换单元中执行逆正交变换。