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公开(公告)号：US5404140A
公开(公告)日：1995-04-04
申请号：US180644
申请日：1994-01-13
CPC分类号： H03M7/4006
摘要： A coding system comprises the comparing circuit which compares a magnitude of the range on the number line which is allocated to the most probability symbol with a magnitude of the fixed range on the number line which is allocated to the Less Probability Symbol. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the MPS, the range allocated to the LPS is generated. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the LPS, the range allocated to the MPS is generated. By the system, a coding efficiency is improved especially when a probability of occurrence of LPS (Less Probability Symbol) is approximate to 1/2.
摘要翻译： 编码系统包括比较电路，其将分配给最大概率符号的号线上的范围的大小与分配给较小概率符号的号线上的固定范围的大小进行比较。 如果分配给MPS的范围小于LPS的范围，并且当符号是MPS时，则生成分配给LPS的范围。 如果分配给MPS的范围小于LPS的范围，并且当符号是LPS时，生成分配给MPS的范围。 通过该系统，当LPS的发生概率（Less概率符号）近似为1/2时，编码效率得到改善。
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公开(公告)号：USRE35781E
公开(公告)日：1998-05-05
申请号：US553235
申请日：1995-11-07
CPC分类号： H04N1/417 , H03M7/4006
摘要： A coding method of a binary Markov information source comprises the steps of providing a range on a number line from 0 to 1 which corresponds to an output symbol sequence from the information source, and performing data compression by binary expressing the position information on the number line corresponding to the output symbol sequence. The present method further includes the steps of providing a normalization number line to keep a desired calculation accuracy by expanding a range of the number line which includes a mapping range, by means of a multiple of a power of 2, when the mapping range becomes below 0.5 of the range of the number line; allocating a predetermined mapping range on the normalization number line for less probable symbols LPS proportional to its normal occurrence probability; allocating the remaining mapping range on the normalization number line for more probable symbols MPS; and reassigning the predetermined mapping range to the remaining mapping range the half of a portion where the allocated remaining range is less than 0.5, when the allocated remaining range becomes below 0.5.
摘要翻译： 二进制马尔科夫信息源的编码方法包括以下步骤：在从数字行0到1之间提供一个对应于来自信息源的输出符号序列的范围，以及通过二进制数据压缩来表示数字行上的位置信息 对应于输出符号序列。 本方法还包括以下步骤：提供归一化数字行以通过在映射范围变得低于2的情况下通过2的幂的倍数扩展包括映射范围的数字行的范围来保持期望的计算精度 数字线范围的0.5; 在归一化数行上分配与其正常发生概率成比例的较小可能符号LPS的预定映射范围; 在归一化数字行上分配剩余的映射范围以获得更可能的符号MPS; 并且当所分配的剩余范围变得低于0.5时，将预定映射范围重新分配给剩余映射范围，其中所分配的剩余范围小于0.5的部分的一半。
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公开(公告)号：US5311177A
公开(公告)日：1994-05-10
申请号：US901762
申请日：1992-06-19
CPC分类号： H03M7/4006 , G06F17/18
摘要： Although data is transmitted with efficiency by an arithmetic encoding system, the number of carry control signals increases in proportion to the number of consecutive bits "1" s or bytes X`FF` s in a conventional system. In the present invention, an arithmetic encoder 302 `detects the possibility of a carry generated during arithmetic coding operation being propagated beyond at least a predetermined number of consecutive bytes X`FF` s in a supplied arithmetic code 315. When the propagation of the carry is impossible, a carry control signal is inserted into the first 2 bits of the byte other than X`FF` which occurs immediately after the consecutive bytes X`FF` s so as to transmit the presence or absence of a carry. An arithmetic decoder 303 detects the continuation of at least a predetermined number of bytes X`FF` s in the arithmetic code 315, and arithmetically decodes an output value YN316 on the basis of the predicted value MPS317 of the occurrence probability of the output value YN316 to be encoded and the region width Qe of the complementary predicted value LPS. Since the number of total bits of the inserted carry control signals is reduced by this "one-time 2-bits insertion system", the total number of transmitted code bits is also reduced.
摘要翻译： 虽然通过算术编码系统有效地发送数据，但是进位控制信号的数量与常规系统中的连续比特数“1”或字节X'FF的比例增加。 在本发明中，算术编码器302'检测在所提供的算术代码315中，算术编码操作中产生的进位在至少预定数量的连续字节X'FF之后传播的可能性。当进位传播 不可能，在紧邻连续字节X'FF之后发生的X'FF'以外的字节的前2位插入进位控制信号，以发送进位的存在或不存在。 算术解码器303检测算术码315中至少预定数量的字节X'FF'的继续，并且基于输出值YN316的发生概率的预测值MPS317对输出值YN316进行算术解码 并且互补预测值LPS的区域宽度Qe。 由于通过“一次2位插入系统”减少了插入的进位控制信号的总比特数，所以发送码位的总数也减少了。
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公开(公告)号：US5059976A
公开(公告)日：1991-10-22
申请号：US470099
申请日：1990-01-25
CPC分类号： H04N1/417 , H03M7/4006
摘要： A coding method of a binary Markov information source comprises the steps of providing a range on a number line from 0 to 1 which corresponds to an output symbol sequence from the information source, and performing data compression by binary expressing the position information on the number line corresponding to the output symbol sequence. The present method further includes the steps of providing a normalization number line to keep a desired calculation accuracy by expanding a range of the number line which includes a mapping range, by means of a multiple of a power of 2, when the mapping range becomes below 0.5 of the range of the number line; allocating a predetermined mapping range on the normalization number line for less probable symbols LPS proportional to its normal occurrence probability; allocating the remaining mapping range on the normalization number line for more probable symbols MPS; and reassigning the predetermined mapping range to the remaining mapping range the half of a portion where the allocated remaining range is less than 0.5, when the allocated remaining range becomes below 0.5.
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公开(公告)号：US5592163A
公开(公告)日：1997-01-07
申请号：US284086
申请日：1994-08-01
IPC分类号： H04N19/50 , H03M7/40 , H04L1/00 , H04L25/49 , H04N1/32 , H04N1/333 , H04N1/41 , H04N1/417 , H04N19/102 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/70 , H04N19/91 , H03M7/00
CPC分类号： H04N1/417 , H03M7/40 , H04N1/32128 , H04N1/33307 , H04N1/33315 , H04N2201/3212
摘要： This invention relates to a coding system and the coding method in encoding information source symbols of an image. When the total number of original information source symbols cannot be known at the decoding site just from the encoded symbols, it is an object to finish the decoding process correctly and decode the symbols equal to the number of original information source symbols.At an encoding site, the total number of information source unit composed of a finite number of information source symbols is placed at the tail of code at the completion of encoding process. For example, at the encoding site, the number of horizontal pels of an image are transmitted in advance as an information source unit and the total number of lines are placed at the tail of code at the completion of encoding process. At the decoding site, the number of decoded lines is counted and decoded up to the number of lines placed at the tail of code. As a result, it is possible to judge the end of information source symbols without missing the total number.
摘要翻译： 本发明涉及对图像信息源码元进行编码的编码系统和编码方法。 当原始信息源符号的总数仅在编码符号的解码位置不能被知道时，其目的是正确地完成解码处理，并解码等于原始信息源符号数的符号。 在编码站点，在编码处理完成时，将由有限数量的信息源符号组成的信息源单元的总数放在代码的尾部。 例如，在编码部位，预先将图像的水平像素数作为信息源单位发送，并且在编码处理完成时将总行数置于代码的尾部。 在解码位置，解码行的数量被计数并解码直到放置在码尾的行数。 结果，可以判断信息源符号的结束而不丢失总数。
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公开(公告)号：US5307062A
公开(公告)日：1994-04-26
申请号：US990377
申请日：1992-12-15
CPC分类号： H03M7/4006
摘要： A coding system comprises the comparing circuit which compares a magnitude of the range on the number line which is allocated to the most probability symbol with a magnitude of the fixed range on the number line which is allocated to the Less Probability Symbol. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the MPS, the range allocated to the LPS is generated. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the LPS, the range allocated to the MPS is generated. By the system, a coding efficiency is improved especially when a probability of occurrence of LPS (Less Probability Symbol) is approximate to 1/2.
摘要翻译： 编码系统包括比较电路，其将分配给最大概率符号的号线上的范围的大小与分配给较小概率符号的号线上的固定范围的大小进行比较。 如果分配给MPS的范围小于LPS的范围，并且当符号是MPS时，则生成分配给LPS的范围。 如果分配给MPS的范围小于LPS的范围，并且当符号是LPS时，生成分配给MPS的范围。 通过该系统，当LPS的发生概率（Less概率符号）近似为1/2时，编码效率得到改善。
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公开(公告)号：US06351569B1
公开(公告)日：2002-02-26
申请号：US09155166
申请日：1998-09-23
申请人： Tomohiro Kimura , Masayuki Yoshida , Fumitaka Ono
发明人： Tomohiro Kimura , Masayuki Yoshida , Fumitaka Ono
IPC分类号： G06K936
CPC分类号： G06T9/004
摘要： A prediction value is previously set in an MPS table corresponding to a state number, a state number for an encoding pixel is obtained from a STATE table, the prediction value is determined based on the MPS table using the state number, a pixel-to-symbol converter compares the prediction value and the encoding pixel to obtain a symbol, and an arithmetic encoder obtains an LPS interval from an LSZ table using the state number for the encoding pixel, and the arithmetic encoder implements encoding based on the symbol and the LPS interval.
摘要翻译： 先前在与状态号对应的MPS表中设置预测值，从STATE表获得编码像素的状态号，根据使用状态号的MPS表确定预测值， 符号转换器比较预测值和编码像素以获得符号，并且算术编码器使用编码像素的状态号从LSZ表获得LPS间隔，并且算术编码器基于符号和LPS间隔来实现编码 。
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公开(公告)号：US06411231B1
公开(公告)日：2002-06-25
申请号：US09275006
申请日：1999-03-24
申请人： Taichi Yanagiya , Tomohiro Kimura , Ikuro Ueno , Masayuki Yoshida , Fumitaka Ono
发明人： Taichi Yanagiya , Tomohiro Kimura , Ikuro Ueno , Masayuki Yoshida , Fumitaka Ono
IPC分类号： H03M700
CPC分类号： H03M7/4006
摘要： In an adaptive probability estimation method, an index referring to coding parameters is determined according to occurrence probabilities of symbols from estimated occurrence counts of symbols, thresholds for probability values that determine the probability intervals corresponding to the indexes are set to values that are examined with small operational load, and an index referring to the corresponding occurrence probability is selected without division, using the probability intervals determined by the thresholds for probability values.
摘要翻译： 在自适应概率估计方法中，根据来自估计的符号发生次数的符号的出现概率来确定参照编码参数的索引，确定与索引对应的概率间隔的概率值的阈值被设置为小的检查值 使用由概率值的阈值确定的概率间隔来选择参考相应出现概率的索引而不分割。
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公开(公告)号：US5991449A
公开(公告)日：1999-11-23
申请号：US680053
申请日：1996-07-15
申请人： Tomohiro Kimura , Ikuro Ueno , Taichi Yanagiya , Masayuki Yoshida , Fumitaka Ono , Naoto Tanabe
发明人： Tomohiro Kimura , Ikuro Ueno , Taichi Yanagiya , Masayuki Yoshida , Fumitaka Ono , Naoto Tanabe
IPC分类号： H04N19/102 , G06T9/00 , H03M7/36 , H04N1/41 , H04N19/103 , H04N19/134 , H04N19/136 , H04N19/137 , H04N19/182 , H04N19/189 , H04N19/192 , H04N19/196 , H04N19/423 , H04N19/426 , H04N19/50 , H04N19/85 , H04N19/91 , G06K9/36
CPC分类号： H04N19/593
摘要： An image memory outputs a target encoding pixel and a plurality of reference pixels in the vicinity thereof. A boundary mode determining unit determines a maximum value and a minimum value of the reference pixels, determines an average value of the maximum value and the minimum value, compares the respective reference pixel values with the average value, detects a boundary in the target encoding pixel and the reference pixels based on comparison results, and detects a pixel distribution state of the reference pixels based on the detected boundary. An adaptive predictor calculates a prediction value by performing a calculation based on a function corresponding to the pixel distribution state and the reference pixels. A prediction difference calculating unit determines a difference value between the prediction value and a value of the target encoding pixel. A prediction coincidence determining unit compares the prediction value and the target encoding pixel value, and outputs a comparison result as a binary signal. A context generator generates a context based on the pixel distribution state and the difference value of the prediction difference calculating unit. An arithmetic encoder encodes the binary signal based on the context thus generated.
摘要翻译： 图像存储器输出其附近的目标编码像素和多个参考像素。 边界模式确定单元确定参考像素的最大值和最小值，确定最大值和最小值的平均值，将各个参考像素值与平均值进行比较，检测目标编码像素中的边界 和基于比较结果的参考像素，并且基于检测到的边界来检测参考像素的像素分布状态。 自适应预测器通过基于与像素分布状态和参考像素对应的功能进行计算来计算预测值。 预测差分计算单元确定预测值和目标编码像素的值之间的差值。 预测符号确定单元将预测值和目标编码像素值进行比较，并输出比较结果作为二进制信号。 上下文生成器基于像素分布状态和预测差分计算单元的差值来生成上下文。 算术编码器根据这样生成的上下文对二进制信号进行编码。
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10.发明授权MULTIPLE QUALITY DATA CREATION ENCODER, MULTIPLE QUALITY DATA CREATION DECODER, MULTIPLE QUANTITY DATA ENCODING DECODING SYSTEM, MULTIPLE QUALITY DATA CREATION ENCODING METHOD, MULTIPLE QUALITY DATA CREATION DECODING METHOD, AND MULTIPLE QUALITY DATA CREATION ENCODING/DECODING METHOD 有权多个质量数据创建编码器，多个质量数据创建解码器，多个数量数据编码解码系统，多个质量数据创建编码方法，多个质量数据创建解码方法和多个质量数据创建编码/解码方法公开(公告)号：US06756921B2
公开(公告)日：2004-06-29
申请号：US10398033
申请日：2003-04-01
申请人： Tomohiro Kimura , Fumitaka Ono , Masayuki Yoshida
发明人： Tomohiro Kimura , Fumitaka Ono , Masayuki Yoshida
IPC分类号： H03M700
CPC分类号： H03M7/4006 , H03M7/40
摘要： Plural decoded results are obtained from one code data based on with/without change information attached to encoding information shared by the receiver. An encoder having a modeling unit 502A′ for modeling input data sequence 501 to obtain a data value 503 and a parameter 504, an encoding unit 505′ for encoding output from the modeling unit, and a code sending unit 506′ for sending output from the encoding unit, the encoder includes: a) a setting changing unit 523A for instructing to change one of the data value and the parameter based on change information 521; and at least one of following b-1) and b-2): b-1) a data manipulating unit 530A for manipulating either of the data value 503 or the parameter 504 output from the modeling unit to output to the encoding unit based on the change information instructed by the setting changing unit; and b-2) a code manipulating unit 531A for obtaining encoded result by instructing the encoding unit to perform predetermined change or manipulating sending code output sent by the code sending unit based on the change information instructed by the change setting unit. Further, a decoder having corresponding function is provided.
摘要翻译： 一种具有建模单元502A'的编码器，具有建模单元502A'，用于对输入数据序列501进行建模以获得数据值503和参数504，该编码器具有一个编码数据， 用于编码来自建模单元的输出的编码单元505'和用于从编码单元发送输出的代码发送单元506'，编码器包括：a）设置改变单元523A，用于指示改变数据值和 基于变化信息的参数521; 和b-1）和b-2）中的至少一个）：b-1）数据操作单元530A，用于操纵从建模单元输出的数据值503或参数504中的任一个，以输出到编码单元 由所述设定改变单元指示的更改信息; 代码操作单元531A，用于通过指示编码单元基于由改变设置单元指示的改变信息执行预定的改变或操纵由代码发送单元发送的发送代码输出来获得编码结果。 此外，提供具有相应功能的解码器。
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