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1. 发明申请

WO2011126424A1 TEXTURE COMPRESSION AND DECOMPRESSION 审中-公开
标题翻译：纹理压缩和分解
公开(公告)号：WO2011126424A1
公开(公告)日：2011-10-13
申请号：PCT/SE2011/050145
申请日：2011-02-09
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , RASMUSSON, Jim , DOGGETT, Michael , STRÖM, Jacob , WENNERSTEN, Per
发明人： RASMUSSON, Jim , DOGGETT, Michael , STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： G06T9/00 , H04N7/26
CPC分类号： G06T9/00
摘要： Embodiments relate to compression and decompression of textures. A texel block (10) is compressed by specifying two major directions in the texel block (10) and defining the profiles of how the texel values change along the respective directions. The resulting compressed texel block (30) comprises two value codewords (31, 32), two line codewords (35-38) and a function codeword (33, 34). The two value codewords (31, 32) are employed to calculate two texel values for the texel block (10). The line codewords (35-38) are employed to determine equations of two lines (20, 22) coinciding with the two major directions in the texel block (10). Signed distances are calculated for each texel (12) from the texel position in the texel block (10) and to the two lines (20, 22). The signed distances are input to a function defined by the function codeword (33, 34) to output two values from which weights are calculated and applied to the two texel values in order to get a representation of the texel value of a texel (12).
摘要翻译：实施例涉及纹理的压缩和解压缩。通过在纹素块（10）中指定两个主要方向来压缩纹理块（10），并且定义纹理值沿着各个方向如何变化的轮廓。所得到的压缩纹理块（30）包括两个值码字（31,32），两行码字（35-38）和一个功能码字（33,34）。两个值码字（31,32）用于计算纹素块（10）的两个纹素值。行码字（35-38）用于确定与纹理块（10）中的两个主要方向一致的两条线（20,22）的等式。从纹理块（10）中的纹素位置和两条线（20,22）中的每个纹理像素（12）计算签名距离。有符号距离被输入到由功能代码字（33,34）定义的函数，以输出计算权重的两个值并将其应用于两个纹素值，以便获得纹素的纹理值的表示（12）。

2. 发明申请

WO2012082029A1 METHOD AND DEVICE FOR STORING A COMPRESSION RATIO INDICATION IN A PIXEL VALUE BUFFER IN TILE ENCODING 审中-公开
标题翻译：用于在层编码中存储像素值缓冲器中的压缩比率的方法和装置
公开(公告)号：WO2012082029A1
公开(公告)日：2012-06-21
申请号：PCT/SE2010/051380
申请日：2010-12-14
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , STRÖM, Jacob , WENNERSTEN, Per
发明人： STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： H04N7/26 , G06T9/00
CPC分类号： G06T9/005 , G06T9/00 , H04N19/428 , H04N19/46 , H04N19/91
摘要： A tile (1) of pixels (6) is encoded by variable length encoding blocks (3-9) of pixels (10) constituting different subsets of the tile (1) to form sequences of symbols (23-29) as encoded representations of the pixel values. A respective size indication (33-39, 52, 54, 56, 58) is determined for each set (12, 14) of at least block. A size indication (33-39, 52, 54, 56, 58) is representative of a compression ratio of a combined sequence (23-29, 51, 53, 55, 57) corresponding to the at least one sequence of symbols (23- 29) obtained for the at least one block of the set (12, 14). The combined sequences (23-29, 51, 53, 55, 57) are arranged in a pixel value buffer (80) in a buffer memory (20). The size indication (32-39, 52, 54, 56, 58) determined for a given set (12, 14) is also stored in the pixel value buffer (80) in the buffer memory (20) to precede, according to a reading order of the pixel value buffer (80), the combined sequence (23-29, 51, 53, 55, 57) of the given set (12, 14).
摘要翻译：像素（6）的瓦片（1）由构成瓦片（1）的不同子集的像素（10）的可变长度编码块（3-9）编码，以形成符号序列（23-29），作为像素值。对于至少块的每个集合（12,14）确定相应的大小指示（33-39,52,54,56,58）。尺寸指示（33-39,52,54,56,58）表示对应于至少一个符号序列的组合序列（23-29,51,53,55,57）的压缩比（23 - 29），用于所述组（12,14）的所述至少一个块获得。组合序列（23-29,51,53,55,57）被布置在缓冲存储器（20）中的像素值缓冲器（80）中。对于给定集合（12,14）确定的尺寸指示（32-39,52,54,56,58）也存储在缓冲存储器（20）中的像素值缓冲器（80）中，根据像素值缓冲器（80）的读取顺序，给定组（12,14）的组合序列（23-29,51,53,55,57）。

3. 发明申请

WO2010147529A1 METHODS AND ARRANGEMENTS FOR IMAGE PROCESSING 审中-公开
标题翻译：图像处理的方法和布置
公开(公告)号：WO2010147529A1
公开(公告)日：2010-12-23
申请号：PCT/SE2009/051483
申请日：2009-12-22
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , RASMUSSON, Jim , AKENINE-MÖLLER, Tomas , WENNERSTEN, Per , STRÖM, Jakob
发明人： RASMUSSON, Jim , AKENINE-MÖLLER, Tomas , WENNERSTEN, Per , STRÖM, Jakob
IPC分类号： G06T9/00
CPC分类号： H04N1/64 , G06T9/00 , H04N19/14 , H04N19/428 , H04N19/593
摘要： The present invention relates to methods and arrangements for compressing images. The invention is based on the fact that edge blocks contain much information in one direction (across the edge), but very little information in the other direction (along the edge). By encoding edges explicitly, it is possible to obtain a high quality to a very low cost for many blocks. A block is encoded by first specifying the orientation of the edge in the block, and then specifying the profile across the edge using a function with a small number of parameters.
摘要翻译：本发明涉及压缩图像的方法和装置。本发明基于以下事实：边缘块在一个方向（跨越边缘）包含许多信息，但在另一个方向（沿着边缘）包含很少的信息。通过明确地编码边缘，可以获得许多块的高质量到非常低的成本。通过首先指定块中边缘的方向，然后使用少量参数的函数来指定边缘上的轮廓来对块进行编码。

4. 发明申请

WO2012105882A1 PIXEL BLOCK COMPRESSION AND DECOMPRESSION 审中-公开
标题翻译：像素块压缩和解压缩
公开(公告)号：WO2012105882A1
公开(公告)日：2012-08-09
申请号：PCT/SE2011/050123
申请日：2011-02-04
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , STRÖM, Jacob , WENNERSTEN, Per
发明人： STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： H04N7/26 , H04N7/34 , H03M7/30 , G06T1/20 , G06T15/00
CPC分类号： H04N1/41 , H04N19/428 , H04N19/50
摘要： Compression of a pixel block (1) having multiple pixels (10, 12, 14) comprises calculating a respective prediction error for each pixel component of the pixels (12, 14) except a defined starting pixel (10). Respective minimum number of symbols required for representing the prediction errors are determined and used to select a symbol configuration among multiple different symbol configurations. Each such symbol configuration defines respective numbers of symbols maximally available for the different prediction errors. A compressed representation (20) of the pixel block (1) comprises a configuration identifier (21) of the selected symbol configuration, a representation of the pixel value of the defined starting pixel (10) and representations (25-27) of the prediction errors calculated for the remaining pixels (12, 14).
摘要翻译：具有多个像素（10,12,14）的像素块（1）的压缩包括计算除了限定的起始像素（10）之外的像素（12,14）的每个像素分量的相应预测误差。确定表示预测误差所需的符号的最小数量，并用于在多个不同符号配置中选择符号配置。每个这样的符号配置定义对于不同的预测误差最大可用的符号的相应数目。像素块（1）的压缩表示（20）包括所选择的符号配置的配置标识符（21），所定义的起始像素（10）的像素值的表示和预测的表示（25-27）为剩余像素（12,14）计算出的误差。

5. 发明申请

WO2009035410A2 DEPTH BUFFER COMPRESSION 审中-公开
标题翻译：深度缓冲压缩
公开(公告)号：WO2009035410A2
公开(公告)日：2009-03-19
申请号：PCT/SE2008/051027
申请日：2008-09-12
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , WENNERSTEN, Per , STRÖM, Jacob
发明人： WENNERSTEN, Per , STRÖM, Jacob
IPC分类号： G06T15/40
CPC分类号： G06T9/00 , G06T15/405 , H04N19/119 , H04N19/12 , H04N19/15 , H04N19/176 , H04N19/42 , H04N19/46
摘要： Device, computer readable medium, and method for selecting compression modes to be applied in a depth buffer (20). The method includes obtaining values corresponding to a tile (30) of the depth buffer (20), selecting a first compression mode (34) from a first plurality of compression modes, compressing the values of the tile (30), writing the compressed values into a first block, based on the first mode (34), and using a preset number of primary bits (34) to store information related to at least one of the first mode (34) and a compression size of the first block, selecting a set of secondary compression modes (32) from a second plurality of compression modes, determining a number of sub-tiles (28), that make up the tile (30), compressing values of the sub-tiles, writing the compressed values into a second block, based on the set of secondary modes (32), and using the same preset number of primary bits (34) to store information related to at least one of the set of secondary modes (32) and a compression size of the second block, comparing the compression size of the tile (30) to the compression size of the sub-tiles (28), choosing the first mode (34) or the set of secondary modes (32) and a corresponding tile size based on a result of the comparing, and storing the selected compressed tile or sub-tiles into the depth buffer (20) and writing into the preset number of primary bits (34) information related to the chosen first mode (34) or set of secondary compression modes (32) or a corresponding size.
摘要翻译：用于选择要在深度缓冲器（20）中应用的压缩模式的设备，计算机可读介质和方法。该方法包括获得与深度缓冲器（20）的图块（30）对应的值，从第一多个压缩模式中选择第一压缩模式（34），压缩图块（30）的值，将压缩值基于所述第一模式（34），并且使用预设数量的主要比特（34）来存储与所述第一模式（34）中的至少一个和所述第一块的压缩大小有关的信息;将所述第一模式来自第二多个压缩模式的一组次压缩模式（32），确定组成瓦片（30）的子瓦片（28）的数量，压缩子瓦片的值，将压缩值写入基于所述一组辅助模式（32），并且使用相同的预设数量的主要比特（34）来存储与所述一组辅助模式（32）中的至少一个有关的信息和所述一组辅助模式第二块，比较拼块（30）的压缩尺寸和压缩尺寸（28）中选择第一模式（34）或第二模式（32）的集合以及相应的图块大小，并且将选择的压缩图块或子图块存储到所述深度缓冲器（20）并将与所选择的第一模式（34）或所述第二压缩模式组（32）或相应大小相关的信息写入预设数量的主要比特（34）。

6. 发明申请

WO2012146320A1 ENCODER, DECODER AND METHODS THEREOF FOR TEXTURE COMPRESSION 审中-公开
标题翻译：编码器，解码器及其对于纹理压缩的方法
公开(公告)号：WO2012146320A1
公开(公告)日：2012-11-01
申请号：PCT/EP2011/068145
申请日：2011-10-18
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , STRÖM, Jacob , WENNERSTEN, Per
发明人： STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： G06T9/00
CPC分类号： G06T9/004 , G06T9/00
摘要： The embodiments of the present invention relate to compression of parameters of an encoded texture block such that an efficient encoding is achieved. Index data is used as an example of parameters to be encoded. Accordingly, encoding the index data is achieved by predicting the index data, wherein the prediction is done in the pixel color domain, where changes often are smooth, instead of in the pixel index domain where the changes vary a lot. Hence, according to embodiments of the present invention the index data is predicted from previously predicted neighboring pixels taking into account that the base value and a modifier table value are known. When the index value is predicted the real index value can be decoded with the prediction as an aid. Since this way of predicting the index provides a very good prediction, it lowers the number of bits needed to represent the pixel index.
摘要翻译：本发明的实施例涉及编码纹理块的参数的压缩，使得实现有效的编码。索引数据用作要编码的参数的示例。因此，通过预测索引数据来实现索引数据的编码，其中在像素颜色域中完成预测，其中变化通常是平滑的，而不是在像素索引域中，其中变化很大。因此，根据本发明的实施例，考虑到基值和修改表值是已知的，从先前预测的相邻像素预测索引数据。当预测索引值时，可以用预测来解码实际索引值。由于这种预测索引的方式提供了非常好的预测，因此降低了表示像素索引所需的位数。

7. 发明申请

WO2012082028A1 TILE ENCODING AND DECODING 审中-公开
标题翻译：编码和解码
公开(公告)号：WO2012082028A1
公开(公告)日：2012-06-21
申请号：PCT/SE2010/051379
申请日：2010-12-14
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , STRÖM, Jacob , WENNERSTEN, Per
发明人： STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： G06T9/00 , H03M7/40
CPC分类号： G06T9/005 , G06T9/00 , H04N19/176 , H04N19/42 , H04N19/436 , H04N19/69 , H04N19/91
摘要： A tile (1) of pixels (6) is encoded by variable length encoding at least a first block (4) of pixels (6) into a first sequence (10) of symbols and a second block (5) of pixels (6) into a second sequence (20) of symbols. The symbols of the first and second sequences (10, 20) are co-organized into a combined sequence (70) of symbols in which the symbols of the first sequence (10) are readable in a first reading direction and at least a portion of the symbols in the second sequence (20) are readable in a second, opposite reading direction. The encoding of the tile (1) to form one or more combined sequences (70) significantly reduces the bandwidth requirements when writing the tile (1) to a pixel value buffer (9). The co-organization of the first and second sequences (10, 20) enables parallel reading and decoding of the first and second sequences (10, 20) from the pixel value buffer (9), thereby reducing any decoding latency.
摘要翻译：像素（6）的瓦片（1）通过将像素（6）的至少第一块（4）可变长度编码为符号的第一序列（10）和像素（6）的第二块（5）来编码，转换成符号的第二个序列（20）。第一和第二序列（10,20）的符号被共同组织成符号的组合序列（70），其中第一序列（10）的符号在第一读取方向上是可读的，并且至少一部分第二序列（20）中的符号在第二相反的读取方向上是可读的。当将瓦片（1）写入像素值缓冲器（9）时，瓦片（1）的形成一个或多个组合序列（70）的编码显着地减少了带宽需求。第一和第二序列（10,20）的共同组织使得能够从像素值缓冲器（9）并行读取和解码第一和第二序列（10,20），从而减少任何解码等待时间。

8. 发明申请

WO2009093947A1 PIXEL BLOCK PROCESSING 审中-公开
标题翻译：像素块处理
公开(公告)号：WO2009093947A1
公开(公告)日：2009-07-30
申请号：PCT/SE2008/051038
申请日：2008-09-17
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , STRÖM, Jacob , AKENINE-MÖLLER, Tomas , WENNERSTEN, Per , RASMUSSON, Jim
发明人： STRÖM, Jacob , AKENINE-MÖLLER, Tomas , WENNERSTEN, Per , RASMUSSON, Jim
IPC分类号： H04N7/26 , G06T9/00
CPC分类号： G06T9/00 , H04N19/105 , H04N19/124 , H04N19/14 , H04N19/15 , H04N19/152 , H04N19/176 , H04N19/182 , H04N19/186 , H04N19/192 , H04N19/426 , H04N19/46 , H04N19/593 , H04N19/98
摘要： A pixel block (300) is losslessly compressed into a candidate compressed block. If the bit length of the candidate block exceeds a threshold value, the property values of the pixels (310-317) in the block (300) are quantized and the quantized values are losslessly compressed into a new candidate compressed block. The procedure is repeated until a candidate compressed block having good image quality and a bit length below the threshold value is found. A compressed representation (400) of the block (300) is determined based on the found candidate compressed block (420) and an identifier (410) of the used quantization parameter.
摘要翻译：像素块（300）被无损压缩成候选压缩块。如果候选块的比特长度超过阈值，则对块（300）中的像素（310-317）的属性值进行量化，并将量化值无损压缩为新的候选压缩块。重复该过程，直到找到具有良好图像质量和位长度低于阈值的候选压缩块。基于所找到的候选压缩块（420）和使用的量化参数的标识符（410）来确定块（300）的压缩表示（400）。

9. 发明申请

WO2009092455A2 PREDICTION-BASED IMAGE PROCESSING 审中-公开
标题翻译：基于预测的图像处理
公开(公告)号：WO2009092455A2
公开(公告)日：2009-07-30
申请号：PCT/EP2008/056288
申请日：2008-05-21
申请人： Telefonaktiebolaget LM Ericsson (publ) , STRÖM, Jacob , WENNERSTEN, Per , AKENINE-MÖLLER, Tomas , RASMUSSON, Jim
发明人： STRÖM, Jacob , WENNERSTEN, Per , AKENINE-MÖLLER, Tomas , RASMUSSON, Jim
IPC分类号： H04N7/34
CPC分类号： G06T9/00 , H04N19/105 , H04N19/124 , H04N19/14 , H04N19/15 , H04N19/152 , H04N19/176 , H04N19/182 , H04N19/186 , H04N19/192 , H04N19/426 , H04N19/46 , H04N19/593
摘要： A pixel block (300) is compressed by providing a respective color component prediction for each pixel (310-318) in the block (300). A difference between color components of two neighboring pixels (312, 316) is calculated and compared to a threshold. If the difference is smaller than the threshold, the prediction is calculated based on a first linear combination the color components of these two neighboring pixels (312, 316). However, if the difference exceeds the threshold, a second or third linear combination of the color components of the neighboring pixels (312, 316) is employed a prediction. A guiding bit (470) associated with the selected linear combination. A prediction error is calculated based on the color component of the pixel (318) and the provided prediction. The compressed block (400) comprises an encoded representation (480) of the prediction error and any guiding bit (470).
摘要翻译：通过对块（300）中的每个像素（310-318）提供相应的颜色分量预测来压缩像素块（300）。计算两个相邻像素（312,316）的颜色分量之间的差异并将其与阈值进行比较。如果差值小于阈值，则基于这两个相邻像素（312,316）的颜色分量的第一线性组合来计算预测。然而，如果差超过阈值，则采用相邻像素（312,316）的颜色分量的第二或第三线性组合来进行预测。与所选择的线性组合相关联的引导位（470）。基于像素（318）的颜色分量和所提供的预测来计算预测误差。压缩块（400）包括预测误差的编码表示（480）和任何引导位（470）。

10. 发明申请

WO2012128701A1 ENCODER, DECODER FOR SCANNING A PICTURE AND METHODS THEREOF 审中-公开
标题翻译：编码器，用于扫描图像的解码器及其方法
公开(公告)号：WO2012128701A1
公开(公告)日：2012-09-27
申请号：PCT/SE2012/050285
申请日：2012-03-15
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , SJÖBERG, Rickard , SAMUELSSON, Jonatan , WENNERSTEN, Per
发明人： SJÖBERG, Rickard , SAMUELSSON, Jonatan , WENNERSTEN, Per
IPC分类号： H04N7/26 , H04N7/50
CPC分类号： H04N19/61 , H04N19/129 , H04N19/176 , H04N19/46
摘要： The present invention relates to an encoder, a decoder and methods thereof for increasing the coding efficiency. The coding efficiency is achieved by introducing Zscan blocks and scanning the Zscan blocks horizontally, row by row, in the picture e.g. by processing the coding units in a Z-scan order within each Zscan block. The Zscan block size is equal to or smaller than the maxsize of the macroblocks and the Zscan block size is larger than the current macroblock size.
摘要翻译：本发明涉及一种用于提高编码效率的编码器，解码器及其方法。编码效率通过引入Zscan块并在图像中逐行扫描Zscan块来实现。通过在每个Zscan块内以Z扫描顺序处理编码单元。 Zscan块大小等于或小于宏块的maxsize，并且Zscan块大小大于当前宏块大小。

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