公开(公告)号：US5825314A

公开(公告)日：1998-10-20

申请号：US717946

申请日：1996-09-23

申请人： Kenichi Kawauchi ,  Taro Yokose ,  Yutaka Koshi ,  Koumei Tomida ,  Eiri Hashimoto

发明人： Kenichi Kawauchi ,  Taro Yokose ,  Yutaka Koshi ,  Koumei Tomida ,  Eiri Hashimoto

IPC分类号： H04N19/00 ,  H03M7/40 ,  H03M7/42 ,  H04N1/41 ,  H04N19/423 ,  H04N19/44 ,  H04N19/91

CPC分类号： H03M7/425

摘要： The present invention provides a variable-length code decoder for inputting a code data bit string having a predetermined number of code data bits in every decoding cycle and decoding it, which comprises storing means for storing a decoded symbol and a node in a code tree in the next decoding cycle corresponding to each combination of a value of the code data bit string and a node in the code tree, reading means for reading the decoded symbol and the node in the code tree in the next decoding cycle from the storing means in accordance with the code data bit string inputted in a current decoding cycle and the node in the code tree in the current decoding cycle, outputting means for outputting the decoded symbol read by the reading means, and providing means for providing the node in the code tree in the next decoding cycle read by the reading means to the reading means.

摘要翻译： 本发明提供一种可变长度码解码器，用于在每个解码周期中输入具有预定数量的码数据位的码数据位串，并对其进行解码，该存储装置用于存储解码码元和节点到代码树中 对应于码数据位串的值和代码树中的节点的每个组合的下一个解码周期，根据存储装置在下一个解码周期中读取解码符号和代码树中的节点的读取装置 在当前解码周期中输入的代码数据位串和当前解码周期中代码树中的节点，输出装置，用于输出由读取装置读取的解码符号;以及提供装置，用于在代码树中提供节点 由读取装置读取的下一个解码周期到读取装置。

公开(公告)号：US06473533B1

公开(公告)日：2002-10-29

申请号：US08956079

申请日：1997-10-22

申请人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06K936

CPC分类号： H04N19/59 ,  H04N19/124 ,  H04N19/126 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

摘要： An input image is subjected to transform by a DCT transforming unit 20. A coefficient analyzing unit 30 compares a predetermined coefficient and coefficient data 120, and obtains low-frequency image data 150 of the input image by a high-frequency coefficient masking unit 50 and an inverse DCT unit 60 on the basis of a result of that comparison. A pixel subsampling unit 70 receives this low-frequency image data 150, and generates a subsampled image on the aforementioned result of comparison. The subsampled image and coefficient information are transmitted to a decoding side. A decoding apparatus decodes an image on the basis of the subsampled image and the coefficient information.

摘要翻译： 输入图像由DCT变换单元20进行变换。系数分析单元30比较预定系数和系数数据120，并通过高频系数掩蔽单元50获得输入图像的低频图像数据150，以及 基于该比较的结果的逆DCT单元60。 像素子采样单元70接收该低频图像数据150，并且根据上述比较结果生成二次采样图像。 子采样图像和系数信息被发送到解码侧。 解码装置基于子采样图像和系数信息对图像进行解码。

公开(公告)号：US6072909A

公开(公告)日：2000-06-06

申请号：US730764

申请日：1996-10-15

申请人： Taro Yokose ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06T1/20 ,  G06K9/36 ,  G06K9/46

CPC分类号： G06T1/20

摘要： Disclosed herein are easy-to-realize multivalued image coding and decoding devices, each of which is capable of reducing memories in number while the accuracy of calculations necessary upon coding and decoding is being held and relaxing a probability estimate. An image disassembler disassembles a bit string indicative of pixels into a plurality of parts in response to image data inputted from an image input unit. Further, the image disassembler sends the value of each disassembled pixel to be coded and the value of each disassembled pixel for reference to an image analyzer as disassembled image data. The image analyzer sends the value of each disassembled pixel to be coded to a coding unit as disassembled pixel-value data and transmits the value of the reference pixel to a probability estimate unit as status data. The probability estimate unit sends probability estimate data corresponding to the status data to the coding unit. The coding unit creates a codeword for each disassembled part from the probability estimate data and the disassembled pixel-value data and sends it to a code output unit as coded data.

摘要翻译： 这里公开的是容易实现的多值图像编码和解码装置，其中每个都能够减少编码和解码所需的计算精度并放宽概率估计的数量上的存储器。 图像反汇编器响应于从图像输入单元输入的图像数据，将指示像素的位串拆分为多个部分。 此外，图像分解器将要被编码的每个拆卸的像素的值和每个拆卸的像素的值发送到图像分析器作为反汇编的图像数据。 图像分析器将要被编码的每个拆卸的像素的值作为分解的像素值数据发送到编码单元，并将参考像素的值作为状态数据发送到概率估计单元。 概率估计单元将对应于状态数据的概率估计数据发送给编码单元。 编码单元从概率估计数据和拆卸的像素值数据为每个拆卸部分创建码字，并将其作为编码数据发送到代码输出单元。

公开(公告)号：US06782133B2

公开(公告)日：2004-08-24

申请号：US10042338

申请日：2002-01-11

申请人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06K936

CPC分类号： H04N19/59 ,  H04N19/124 ,  H04N19/126 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

摘要： An input image is subjected to transform by a DCT transforming unit 20. A coefficient analyzing unit 30 compares a predetermined coefficient and coefficient data 120, and obtains low-frequency image data 150 of the input image by a high-frequency coefficient masking unit 50 and an inverse DCT unit 60 on the basis of a result of that comparison. A pixel subsampling unit 70 receives this low-frequency image data 150, and generates a subsampled image on the basis of the aforementioned result of comparison. The subsampled image and coefficient information are transmitted to a decoding side. A decoding apparatus decodes an image on the basis of the subsampled image and the coefficient information.

摘要翻译： 输入图像由DCT变换单元20进行变换。系数分析单元30比较预定系数和系数数据120，并通过高频系数掩蔽单元50获得输入图像的低频图像数据150，以及 基于该比较的结果的逆DCT单元60。 像素子采样单元70接收该低频图像数据150，并且基于上述比较结果生成二次采样图像。 子采样图像和系数信息被发送到解码侧。 解码装置基于子采样图像和系数信息对图像进行解码。

公开(公告)号：US20050053287A1

公开(公告)日：2005-03-10

申请号：US10722439

申请日：2003-11-28

申请人： Ikken So ,  Masanori Sekino ,  Taro Yokose ,  Yutaka Koshi

发明人： Ikken So ,  Masanori Sekino ,  Taro Yokose ,  Yutaka Koshi

IPC分类号： G06T5/00 ,  G06K9/36 ,  G06T5/20 ,  H04N1/409 ,  H04N1/417 ,  H04N5/92 ,  H04N19/40 ,  H04N19/60 ,  H04N19/80 ,  H04N19/85 ,  H04N19/90 ,  H04N19/93

CPC分类号： H04N19/85 ,  H04N19/50 ,  H04N19/80

摘要： Filtering for enhancing the reversible compression rate is performed for image data as preprocessing of compression processing. For image processing after the filtering, repeating of compression and decompression according to the reversible compression technique corresponding to the filtering is allowed. As the filtering and reversible compression processing are performed, a sufficient compression ratio is provided and accumulation of image quality degradation by repeating compression and decompression is prevented.

摘要翻译： 对作为压缩处理的预处理的图像数据进行用于提高可逆压缩率的滤波。 对于滤波后的图像处理，允许根据对应于滤波的可逆压缩技术重复压缩和解压缩。 由于进行了滤波和可逆压缩处理，因此提供了足够的压缩比，并且防止了通过重复压缩和解压缩降低图像质量的累积。

公开(公告)号：US06650786B2

公开(公告)日：2003-11-18

申请号：US10228992

申请日：2002-08-28

申请人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06K946

CPC分类号： H04N19/132 ,  G06F3/0338 ,  G06T3/4084 ,  H01H25/008 ,  H01H25/041 ,  H01H2001/5888 ,  H01H2239/024 ,  H04N19/18 ,  H04N19/60

摘要： An input image is subjected to transform by a DCT transforming unit 20. A coefficient analyzing unit 30 compares a predetermined coefficient and coefficient data 120, and obtains low-frequency image data 150 of the input image by a high-frequency coefficient masking unit 50 and an inverse DCT unit 60 on the basis of a result of that comparison. A pixel subsampling unit 70 receives this low-frequency image data 150, and generates a subsampled image on the basis of the aforementioned result of comparison. The subsampled image and coefficient information are transmitted to a decoding side. A decoding apparatus decodes an image on the basis of the subsampled image and the coefficient information.

公开(公告)号：US06516096B2

公开(公告)日：2003-02-04

申请号：US10041567

申请日：2002-01-10

申请人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Ikken So ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06K936

CPC分类号： H04N19/59 ,  H04N19/124 ,  H04N19/126 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60

摘要： An input image is subjected to transform by a DCT transforming unit 20. A coefficient analyzing unit 30 compares a predetermined coefficient and coefficient data 120, and obtains low-frequency image data 150 of the input image by a high-frequency coefficient masking unit 50 and an inverse DCT unit 60 on the basis of a result of that comparison. A pixel subsampling unit 70 receives this low-frequency image data 150, and generates a subsampled image on the basis of the aforementioned result of comparison. The subsampled image and coefficient information are transmitted to a decoding side. A decoding apparatus decodes an image on the basis of the subsampled image and the coefficient information.

公开(公告)号：US6118900A

公开(公告)日：2000-09-12

申请号：US396434

申请日：1999-09-15

申请人： Taro Yokose ,  Shunichi Kimura ,  Yutaka Koshi

发明人： Taro Yokose ,  Shunichi Kimura ,  Yutaka Koshi

IPC分类号： G06T1/20 ,  G06K9/36 ,  G06K9/46

CPC分类号： G06T1/20

摘要： Disclosed herein are easy-to-realize multivalued image coding and decoding devices, each of which is capable of reducing memories in number while the accuracy of calculations necessary upon coding and decoding is being held and relaxing a probability estimate. An image disassembler disassembles a bit string indicative of pixels into a plurality of parts in response to image data inputted from an image input unit. Further, the image disassembler sends the value of each disassembled pixel to be coded and the value of each disassembled pixel for reference to an image analyzer as disassembled image data. The image analyzer sends the value of each disassembled pixel to be coded to a coding unit as disassembled pixel-value data and transmits the value of the reference pixel to a probability estimate unit as status data. The probability estimate unit sends probability estimate data corresponding to the status data to the coding unit. The coding unit creates a codeword for each disassembled part from the probability estimate data and the disassembled pixel-value data and sends it to a code output unit as coded data.

摘要翻译： 这里公开的是容易实现的多值图像编码和解码装置，其中每个都能够减少编码和解码所需的计算精度并放宽概率估计的数量上的存储器。 图像反汇编器响应于从图像输入单元输入的图像数据，将指示像素的位串拆分为多个部分。 此外，图像分解器将要被编码的每个拆卸的像素的值和每个拆卸的像素的值发送到图像分析器作为反汇编的图像数据。 图像分析器将要被编码的每个拆卸的像素的值作为分解的像素值数据发送到编码单元，并将参考像素的值作为状态数据发送到概率估计单元。 概率估计单元将对应于状态数据的概率估计数据发送给编码单元。 编码单元从概率估计数据和拆卸的像素值数据为每个拆卸部分创建码字，并将其作为编码数据发送到代码输出单元。

公开(公告)号：US5784012A

公开(公告)日：1998-07-21

申请号：US717945

申请日：1996-09-23

申请人： Kenichi Kawauchi ,  Taro Yokose ,  Yutaka Koshi ,  Eiri Hashimoto

发明人： Kenichi Kawauchi ,  Taro Yokose ,  Yutaka Koshi ,  Eiri Hashimoto

IPC分类号： H03M7/40 ,  H03M7/42

CPC分类号： H03M7/425

摘要： A variable-length code decoder includes plural barrel shifters, each of which executes shift processing on inputted variable-length code data bit by bit from the 0 bit to (the bit number of a maximum length codeword -1). The barrel shifters, which are in number equal to the bit number of the maximum length codeword, are arranged in parallel connection. Plural storing devices are provided, each of which stores a pair of a decoded symbol and codeword length thereof corresponding to code data. Plural fetching devices are provided, each of which fetches the pair of the decoded symbol and the codeword length thereof in accordance with the code data outputted from each of the barrel shifters. Each of the fetching devices is connected to a respective barrel shifter and storing devices. A selecting device is provided for selecting a predetermined pair from plural pairs of the decoded symbol and the codeword length fetched by the plural fetching devices in an initial decoding process. The selecting device further selects any one pair from the plural pairs of the decoded symbol and the codeword length utilizing the codeword length selected in the initial decoding process in subsequent decoding processes.

摘要翻译： 可变长度码解码器包括多个桶形移位器，每个桶形移位器对从0位到（最大长度码字-1的位数）逐位执行对输入的可变长度码数据的移位处理。 数量等于最大长度码字的位数的桶形移位器被并联布置。 提供了多个存储装置，每个存储装置存储对应于代码数据的一对解码符号和码字长度。 提供了多个提取装置，每个取出装置根据从每个桶形移位器输出的代码数据，取出一对解码符号及其码字长度。 每个取出装置连接到相应的桶形移位器和存储装置。 提供了一种选择装置，用于在初始解码处理中从多对解码符号中选择预定的对，以及由多个提取装置获取的码字长度。 选择装置利用在后续解码处理中的初始解码处理中选择的码字长度，从多对解码符号和码字长度中进一步选择一对。

公开(公告)号：US08600156B2

公开(公告)日：2013-12-03

申请号：US13397281

申请日：2012-02-15

申请人： Taro Yokose

发明人： Taro Yokose

IPC分类号： G06K9/36 ,  H04N1/41

CPC分类号： H04N1/648 ,  H04N19/115 ,  H04N19/124 ,  H04N19/15 ,  H04N19/176 ,  H04N19/192

摘要： Provided is an image processing apparatus including a receiving unit that receives a point sequence image, a point-plane conversion unit that performs a point-plane conversion processing for the image received by the receiving unit, plural lossy encoding units that perform a lossy encoding processing for the point-plane conversion image by using the point-plane conversion unit, and a control unit that performs control such that transmission of the image to the lossy encoding unit from the point-plane conversion unit is controlled to synchronize lossy encoding processings of the plural lossy encoding units, and each lossy encoding unit changes processing variables used in the encoding processing based on a code amount of the processing result of the lossy encoding unit.

摘要翻译： 提供一种图像处理装置，包括接收点序列图像的接收单元，对由接收单元接收的图像执行点平面转换处理的点平面转换单元，执行有损编码处理的多个有损编码单元 对于通过使用点平面转换单元的点平面转换图像，以及控制单元，其执行控制，使得从点平面转换单元传输图像到有损编码单元被控制以同步有损编码处理 多个有损编码单元，并且每个有损编码单元基于有损编码单元的处理结果的代码量改变在编码处理中使用的处理变量。