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1. 发明公开

EP2637407A1 Apparatus and method for decoding Huffman codes 审中-公开
标题翻译： Vorrichtung und Verfahren zum Decodieren von Huffman Koden
公开(公告)号：EP2637407A1
公开(公告)日：2013-09-11
申请号：EP13157836.1
申请日：2013-03-05
申请人： Samsung Electronics Co., Ltd
发明人： Kim, Doo Hyun , Kim, Do Hyung , Lee, Shi Hwa
IPC分类号： H04N7/26 , H03M7/40
CPC分类号： H03M7/425 , H03M7/4043 , H03M7/4062 , H04N19/91
摘要： A decoding apparatus and method store at least one table including at least one code, receive at least one instruction signal, and extract a symbol value and a symbol length from the at least one table based on the at least one instruction signal. The decoding apparatus calculates a target suffix length that minimizes the size of a generated table and minimizes the size of a non-prefix length of the at least one code.
摘要翻译：解码装置和方法存储至少一个表，其包括至少一个代码，接收至少一个指令信号，以及基于所述至少一个指令信号从所述至少一个表提取符号值和符号长度。解码装置计算使所生成的表的大小最小的目标后缀长度，并且使至少一个代码的非前缀长度的大小最小化。

2. 发明公开

EP3295568A1 IMPROVED COMPRESSED CACHING IN A VIRTUAL MEMORY SYSTEM 有权
公开(公告)号：EP3295568A1
公开(公告)日：2018-03-21
申请号：EP16719648
申请日：2016-04-15
申请人： QUALCOMM INC
发明人： MILNER ADRIENNE , ANSARI AMIN , SENIOR RICHARD , BICA VITO REMO
IPC分类号： H03M7/30 , G06F12/08 , H04N19/91
CPC分类号： H03M7/4062 , G06F2212/401 , H03M7/30 , H03M7/3084 , H03M7/4006 , H03M7/42 , H03M7/48 , H04N19/423 , H04N19/91
摘要： Data compression systems, methods, and computer program products are disclosed. For each successive input word of an input stream, it is determined whether the input word matches an entry in a lookback table. The lookback table is updated in response to the input word. Input words may be of a number of data types, including zero runs and full or partial matches with an entry in the lookback table. A codeword is generated by entropy encoding a data type corresponding to the input word. The lookback table may be indexed by the position of the input word in the input stream.

3. 发明公开

EP3152840A4 VLSI EFFICIENT HUFFMAN ENCODING APPARATUS AND METHOD 有权转让
公开(公告)号：EP3152840A4
公开(公告)日：2018-05-30
申请号：EP15806381
申请日：2015-06-08
申请人： MICRON TECHNOLOGY INC
发明人： WU YINGQUAN , HUBRIS ALEXANDER
IPC分类号： H03M7/40 , H03M7/30
CPC分类号： H03M7/40 , H03M7/3084 , H03M7/4037 , H03M7/4056 , H03M7/4062 , H03M7/6047 , H03M7/6058
摘要： A compression algorithm based on Huffman coding is disclosed that is adapted to be readily implemented using VLSI design. A data file may be processed to replace duplicate data with a copy commands including an offset and length, such as according to the LV algorithm. A Huffman code may then be generated for parts of the file. The Huffman code may be generated according to a novel method that generates Huffman code lengths for literals in a data file without first sorting the literal statistics. The Huffman code lengths may be constrained to be no longer than a maximum length and the Huffman code may be modified to provide an acceptable overflow probability and be in canonical order. Literals, offsets, and lengths may be separately encoded. The different values for these data sets may be assigned to a limited number of bins for purpose of generating usage statistics used for generating Huffman codes.

4. 发明公开

EP3152840A1 VLSI EFFICIENT HUFFMAN ENCODING APPARATUS AND METHOD 有权转让
标题翻译： VLSI高效Huffman编码装置和方法
公开(公告)号：EP3152840A1
公开(公告)日：2017-04-12
申请号：EP15806381.8
申请日：2015-06-08
申请人： Tidal Systems, Inc.
发明人： WU, Yingquan , HUBRIS, Alexander
IPC分类号： H03M7/40
CPC分类号： H03M7/40 , H03M7/3084 , H03M7/4037 , H03M7/4056 , H03M7/4062 , H03M7/6047 , H03M7/6058
摘要： A compression algorithm based on Huffman coding is disclosed that is adapted to be readily implemented using VLSI design. A data file may be processed to replace duplicate data with a copy commands including an offset and length, such as according to the LV algorithm. A Huffman code may then be generated for parts of the file. The Huffman code may be generated according to a novel method that generates Huffman code lengths for literals in a data file without first sorting the literal statistics. The Huffman code lengths may be constrained to be no longer than a maximum length and the Huffman code may be modified to provide an acceptable overflow probability and be in canonical order. Literals, offsets, and lengths may be separately encoded. The different values for these data sets may be assigned to a limited number of bins for purpose of generating usage statistics used for generating Huffman codes.
摘要翻译：公开了一种基于霍夫曼编码的压缩算法，其适于使用VLSI设计容易地实现。数据文件可以被处理以利用包括偏移和长度的复制命令（诸如根据LV算法）来替换重复的数据。然后可以为文件的部分生成霍夫曼代码。霍夫曼代码可以根据一种新的方法生成，该方法在不首先对文字统计进行排序的情况下为数据文件中的文字生成霍夫曼代码长度。霍夫曼码长度可以被限制为不超过最大长度，并且霍夫曼码可以被修改以提供可接受的溢出概率并且处于规范的次序。文字，偏移量和长度可以单独编码。为了生成用于生成霍夫曼代码的使用统计量，可以将这些数据集的不同值分配给有限数量的箱。

5. 发明授权

EP3295568B1 IMPROVED COMPRESSED CACHING IN A VIRTUAL MEMORY SYSTEM 有权
公开(公告)号：EP3295568B1
公开(公告)日：2018-12-05
申请号：EP16719648.4
申请日：2016-04-15
申请人： Qualcomm Incorporated
发明人： MILNER, Adrienne , ANSARI, Amin , SENIOR, Richard , BICA, Vito Remo
IPC分类号： H03M7/30 , H04N19/91 , G06F12/08
CPC分类号： H03M7/4062 , G06F2212/401 , H03M7/30 , H03M7/3084 , H03M7/4006 , H03M7/42 , H03M7/48 , H04N19/423 , H04N19/91
摘要： Data compression systems, methods, and computer program products are disclosed. For each successive input word of an input stream, it is determined whether the input word matches an entry in a lookback table. The lookback table is updated in response to the input word. Input words may be of a number of data types, including zero runs and full or partial matches with an entry in the lookback table. A codeword is generated by entropy encoding a data type corresponding to the input word. The lookback table may be indexed by the position of the input word in the input stream.

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