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41. 发明授权

US08451904B2 8-point transform for media data coding 失效
标题翻译：用于媒体数据编码的8点变换
公开(公告)号：US08451904B2
公开(公告)日：2013-05-28
申请号：US12820329
申请日：2010-06-22
申请人： Yuriy Reznik , Rajan L. Joshi , Marta Karczewicz
发明人： Yuriy Reznik , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N7/12
CPC分类号： H04N19/00812 , G06F17/147 , H04N19/42 , H04N19/45 , H04N19/61 , H04N19/625
摘要： In general, techniques are described for implementing an 8-point discrete cosine transform (DCT). An apparatus comprising an 8-point discrete cosine transform (DCT) hardware unit may implement these techniques to transform media data from a spatial domain to a frequency domain. The 8-point DCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point DCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third internal factor and a fourth internal factor, as well as, the fifth internal factor and a sixth internal factor.
摘要翻译：通常，描述了用于实现8点离散余弦变换（DCT）的技术。包括8点离散余弦变换（DCT）硬件单元的装置可以实施这些技术以将媒体数据从空间域转换到频域。 8点DCT硬件单元包括与根据第一关系的第一缩放因子（mu）相关的因子A，B的偶数部分。 8点DCT硬件单元还包括与根据第二关系的第二缩放因子（eta）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。第二个关系将第二个缩放因子与第三个内在因素和第四个内在因素以及第五个内在因素和第六个内在因素联系起来。

42. 发明授权

US08385424B2 Reduction of errors during computation of inverse discrete cosine transform 有权
标题翻译：在计算逆离散余弦变换期间减少误差
公开(公告)号：US08385424B2
公开(公告)日：2013-02-26
申请号：US11767444
申请日：2007-06-22
申请人： Yuriy Reznik
发明人： Yuriy Reznik
IPC分类号： H04N7/12 , G06K9/36
CPC分类号： G06F17/147 , H04N19/45 , H04N19/60 , H04N19/61
摘要： Techniques are described to reduce rounding errors during computation of discrete cosine transform using fixed-point calculations. According to these techniques, an inverse discrete cosine transform a vector of coefficients is calculated using a series of butterfly structure operations on fixed-point numbers. Next, a midpoint bias value and a supplemental bias value are added to a DC coefficient of the matrix of scaled coefficients. Next, an inverse discrete cosine transform is applied to the resulting matrix of scaled coefficients. Values in the resulting matrix are then right-shifted in order to derive a matrix of pixel component values. As described herein, the addition of the supplemental bias value to the DC coefficient reduces rounding errors attributable to this right-shifting. As a result, a final version of a digital media file decompressed using these techniques may more closely resemble an original version of a digital media file.
摘要翻译：描述了使用定点计算在离散余弦变换计算期间减少舍入误差的技术。根据这些技术，使用对定点数量的一系列蝶形结构操作来计算系数向量的逆离散余弦变换。接下来，将中点偏置值和补充偏置值加到缩放系数矩阵的DC系数中。接下来，将逆离散余弦变换应用于所得到的缩放系数矩阵。然后将所得矩阵中的值右移，以便导出像素分量值的矩阵。如这里所述，补充偏置值加到DC系数可以减少归因于该右移的舍入误差。因此，使用这些技术解压缩的数字媒体文件的最终版本可能更接近于数字媒体文件的原始版本。

43. 发明申请

US20120177108A1 32-POINT TRANSFORM FOR MEDIA DATA CODING 有权
标题翻译：用于媒体数据编码的32点变换
公开(公告)号：US20120177108A1
公开(公告)日：2012-07-12
申请号：US13346632
申请日：2012-01-09
申请人： Rajan Laxman Joshi , Yuriy Reznik , Joel Sole Rojals , Marta Karczewicz
发明人： Rajan Laxman Joshi , Yuriy Reznik , Joel Sole Rojals , Marta Karczewicz
IPC分类号： H04N7/30 , H04N7/50 , H04N7/26
CPC分类号： G06F17/147 , H04N19/625
摘要： In general, techniques are described for implementing a 32-point discrete cosine transform (DCT) that is capable of applying multiple DCTs of different sizes. For example, an apparatus comprising a 32-point discrete cosine transform of type II (DCT-II) unit may implement the techniques of this disclosure. The 32-point DCT-II unit performs these DCTs-II of different sizes to transform data from a spatial to a frequency domain. The 32-point DCT-II unit includes an 16-point DCT-II unit that performs one of the DCTs-II of size 16 and at least one 8-point DCT-II unit that performs one of the DCTs-II of size 8. The 16-point DCT-II unit includes another 8-point DCT-II unit. The 16-point DCT-II unit also comprises at least one 4-point DCTs-II unit. Two or more of these DCTs-II units may concurrently perform DCTs-II of different sizes to various portions of the content data.
摘要翻译：通常，描述了用于实现能够应用不同尺寸的多个DCT的32点离散余弦变换（DCT）的技术。例如，包括II型（DCT-II）单元的32点离散余弦变换的装置可以实现本公开的技术。 32点DCT-II单元执行不同尺寸的DCT-II，以将数据从空间转换到频域。 32点DCT-II单元包括执行尺寸为16的DCT-II之一的16点DCT-II单元和执行尺寸为8的DCT-II之一的至少一个8点DCT-II单元 16点DCT-II单元包括另外8点DCT-II单元。 16点DCT-II单元还包括至少一个4点DCT-II单元。这些DCT-II单元中的两个或更多个可以对内容数据的各个部分同时执行不同大小的DCT-II。

44. 发明申请

US20120109993A1 Performing Visual Search in a Network 审中-公开
标题翻译：在网络中执行视觉搜索
公开(公告)号：US20120109993A1
公开(公告)日：2012-05-03
申请号：US13158013
申请日：2011-06-10
申请人： Yuriy Reznik
发明人： Yuriy Reznik
IPC分类号： G06F17/30
CPC分类号： G06F16/583 , G06K9/4671
摘要： In general, techniques are described for performing a visual search in a network. A client device comprising an interface, a feature extraction unit and a feature compression unit may implement various aspects of the techniques. The feature extraction unit extracts feature descriptors from an image. The feature compression unit quantizes the image feature descriptors at a first quantization level. The interface that transmits the first query data to the visual search device via the network. The feature compression unit determines second query data that augments the first query data such that when the first query data is updated with the second query data the updated first query data is representative of the image feature descriptors quantized at a second quantization level. The interface transmits the second query data to the visual search device via the network to successively refine the first query data.
摘要翻译：通常，描述了用于在网络中执行视觉搜索的技术。包括接口，特征提取单元和特征压缩单元的客户端设备可以实现该技术的各个方面。特征提取单元从图像中提取特征描述符。特征压缩单元以第一量化级量化图像特征描述符。通过网络将第一查询数据发送到可视搜索设备的接口。特征压缩单元确定增加第一查询数据的第二查询数据，使得当用第二查询数据更新第一查询数据时，更新的第一查询数据表示在第二量化级别量化的图像特征描述符。该接口经由网络将第二查询数据发送到视觉搜索装置，以连续细化第一查询数据。

45. 发明申请

US20120014455A1 Variable Localized Bit-Depth Increase for Fixed-Point Transforms in Video Coding 有权
标题翻译：视频编码中定点变换的可变局部位深增加
公开(公告)号：US20120014455A1
公开(公告)日：2012-01-19
申请号：US13159063
申请日：2011-06-13
申请人： Rajan L. Joshi , Wei-Jung Chien , Marta Karczewicz , Yuriy Reznik , Peisong Chen , Hsiao-Chiang Chuang
发明人： Rajan L. Joshi , Wei-Jung Chien , Marta Karczewicz , Yuriy Reznik , Peisong Chen , Hsiao-Chiang Chuang
IPC分类号： H04N7/30
CPC分类号： H04N19/42 , H04N19/122 , H04N19/157 , H04N19/176 , H04N19/184 , H04N19/196 , H04N19/46 , H04N19/60 , H04N19/61
摘要： This disclosure describes techniques for mitigating rounding errors in a fixed-point transform associated with video coding by applying a variable localized bit-depth increase at the transform. More specifically, the techniques include selecting a constant value based on a size of a fixed-point transform in a video coding device and applying a variable localized bit-depth increase at the transform with a value equal to the constant value. Applying the variable localized bit-depth increase includes left-shifting a transform input signal by a number of bits equal to the constant value before the fixed-point transform, and right-shifting a transform output signal by a number of bits equal to the constant value after the fixed-point transform. The constant value is selected from a plurality of constant values stored on the video coding device. Each of the constant values is pre-calculated for one of a plurality of different transform sizes supported by the video coding.
摘要翻译：本公开描述了通过在变换处应用可变局部位深增加来减轻与视频编码相关联的定点变换中的舍入误差的技术。更具体地，这些技术包括基于视频编码装置中的定点变换的大小来选择常数值，并且在变换时以等于常数值的值应用可变的局部位深增加。应用可变局部位置深度增加包括将变换输入信号左移到等于定点变换之前的常数值的位数，并且将变换输出信号右移到等于常数的位数定点变换后的值。从存储在视频编码装置上的多个常数值中选择常数值。对于由视频编码支持的多个不同的变换大小之一，预先计算每个常数值。

46. 发明申请

US20110150078A1 8-POINT TRANSFORM FOR MEDIA DATA CODING 失效
标题翻译：用于媒体数据编码的8点变换
公开(公告)号：US20110150078A1
公开(公告)日：2011-06-23
申请号：US12820329
申请日：2010-06-22
申请人： Yuriy Reznik , Rajan L. Joshi , Marta Karczewicz
发明人： Yuriy Reznik , Rajan L. Joshi , Marta Karczewicz
IPC分类号： H04N7/30
CPC分类号： H04N19/00812 , G06F17/147 , H04N19/42 , H04N19/45 , H04N19/61 , H04N19/625
摘要： In general, techniques are described for implementing an 8-point discrete cosine transform (DCT). An apparatus comprising an 8-point discrete cosine transform (DCT) hardware unit may implement these techniques to transform media data from a spatial domain to a frequency domain. The 8-point DCT hardware unit includes an even portion comprising factors A, B that are related to a first scaled factor (μ) in accordance with a first relationship. The 8-point DCT hardware unit also includes an odd portion comprising third, fourth, fifth and sixth internal factors (G, D, E, Z) that are related to a second scaled factor (η) in accordance with a second relationship. The first relationship relates the first scaled factor to the first and second internal factors. The second relationship relates the second scaled factor to the third internal factor and a fourth internal factor, as well as, the fifth internal factor and a sixth internal factor.
摘要翻译：通常，描述了用于实现8点离散余弦变换（DCT）的技术。包括8点离散余弦变换（DCT）硬件单元的装置可以实施这些技术以将媒体数据从空间域转换到频域。 8点DCT硬件单元包括与根据第一关系的第一缩放因子（μ）相关的因子A，B的偶数部分。 8点DCT硬件单元还包括与根据第二关系的第二缩放因子（＆eegr）相关的第三，第四，第五和第六内部因素（G，D，E，Z）的奇数部分。第一个关系将第一个缩放因子与第一个和第二个内部因素相关联。第二个关系将第二个缩放因子与第三个内在因素和第四个内在因素以及第五个内在因素和第六个内在因素联系起来。

47. 发明申请

US20100262427A1 LOW COMPLEXITY SPECTRAL BAND REPLICATION (SBR) FILTERBANKS 有权
标题翻译：低复杂频谱带复制（SBR）滤波器
公开(公告)号：US20100262427A1
公开(公告)日：2010-10-14
申请号：US12759248
申请日：2010-04-13
申请人： Ravi Kiran Chivukula , Yuriy Reznik
发明人： Ravi Kiran Chivukula , Yuriy Reznik
IPC分类号： G06F17/00
CPC分类号： H03H17/0227 , G10L19/0204 , G10L19/0212 , G10L19/022 , G10L21/02 , G10L25/18 , H03H17/0213 , H03H17/0266 , H03H17/0272 , H03H2218/04
摘要： A complex analysis filterbank is implemented by obtaining an input audio signal as a plurality of N time-domain input samples. Pair-wise additions and subtractions of the time-domain input samples is performed to obtain a first and second groups of intermediate samples, each group having N/2 intermediate samples. The signs of odd-indexed intermediate samples in the second group are then inverted. A first transform is applied to the first group of intermediate samples to obtain a first group of output coefficients in the frequency domain. A second transform is applied to the second group of intermediate samples to obtain an intermediate second group of output coefficients in the frequency domain. The order of coefficients in the intermediate second group of output coefficients is then reversed to obtain a second group of output coefficients. The first and second groups of output coefficients may be stored and/or transmitted as a frequency domain representation of the audio signal.
摘要翻译：通过获得作为多个N个时域输入样本的输入音频信号来实现复分析滤波器组。执行时域输入样本的成对加法和减法以获得第一组和第二组中间样本，每组具有N / 2个中间样本。然后将第二组中奇数中值样本的符号反转。对第一组中间样本应用第一变换，以获得频域中的第一组输出系数。对第二组中间样本应用第二变换，以获得频域中的输出系数的中间第二组。输出系数的中间第二组中的系数顺序被反转以获得第二组输出系数。第一和第二组输出系数可以作为音频信号的频域表示被存储和/或发送。

48. 发明申请

US20090234644A1 Low-complexity encoding/decoding of quantized MDCT spectrum in scalable speech and audio codecs 有权
标题翻译：可扩展语音和音频编解码器中量化MDCT频谱的低复杂度编码/解码
公开(公告)号：US20090234644A1
公开(公告)日：2009-09-17
申请号：US12255604
申请日：2008-10-21
申请人： Yuriy Reznik , Pengjun Huang
发明人： Yuriy Reznik , Pengjun Huang
IPC分类号： G10L19/02 , G10L19/00
CPC分类号： G10L19/24 , G10L19/038
摘要： A scalable speech and audio codec is provided that implements combinatorial spectrum encoding. A residual signal is obtained from a Code Excited Linear Prediction (CELP)-based encoding layer, where the residual signal is a difference between an original audio signal and a reconstructed version of the original audio signal. The residual signal is transformed at a Discrete Cosine Transform (DCT)-type transform layer to obtain a corresponding transform spectrum having a plurality of spectral lines. The transform spectrum spectral lines are transformed using a combinatorial position coding technique.The combinatorial position coding technique includes generating a lexicographical index for a selected subset of spectral lines, where each lexicographic index represents one of a plurality of possible binary strings representing the positions of the selected subset of spectral lines. The lexicographical index represents non-zero spectral lines in a binary string in fewer bits than the length of the binary string.
摘要翻译：提供可实现组合频谱编码的可扩展语音和音频编解码器。从基于码激励线性预测（CELP）的编码层获得残留信号，其中残留信号是原始音频信号和原始音频信号的重建版本之间的差异。残差信号在离散余弦变换（DCT）型变换层处变换，以获得具有多个谱线的对应变换频谱。使用组合位置编码技术对变换频谱谱线进行变换。组合位置编码技术包括为选定的谱线子集生成词典索引，其中每个词典索引表示表示所选择的谱线子集的位置的多个可能的二进制串中的一个。字典索引表示二进制串中的非零谱线，比二进制串的长度少。

49. 发明申请

US20090063599A1 FAST COMPUTATION OF PRODUCTS BY DYADIC FRACTIONS WITH SIGN-SYMMETRIC ROUNDING ERRORS 有权
标题翻译：通过具有符号对称错误的DYADIC分段快速计算产品
公开(公告)号：US20090063599A1
公开(公告)日：2009-03-05
申请号：US12139957
申请日：2008-06-16
申请人： Yuriy Reznik
发明人： Yuriy Reznik
IPC分类号： G06F7/485 , G06F17/10
CPC分类号： G06F7/483 , G06F7/49942 , G06F7/533 , G06F17/147 , H04N19/42 , H04N19/60
摘要： A product of an integer value and an irrational value may be determined by a sign-symmetric algorithm. A process may determine possible algorithms that minimize metrics such as mean asymmetry, mean error, variance of error, and magnitude of error. Given an integer variable x and rational dyadic constants that approximate the irrational fraction, a series of intermediate values may be produced that are sign-symmetric. The intermediate values may include a sequence of addition, subtraction and right shift operations the when summed together approximate the product of the integer and irrational value. Other operations, such as additions or subtractions of 0s or shifts by 0 bits may be removed.
摘要翻译：可以通过符号对称算法来确定整数值和非理性值的乘积。过程可以确定最小化度量的可能算法，例如平均不对称性，平均误差，误差方差和误差大小。给定一个整数变量x和近似非理性分数的有理二元常数，可以产生一系列中间值，这些中间值是符号对称的。中间值可以包括加法，减法和右移操作的序列，当加在一起近似整数和非理性值的乘积时。可以删除其他操作，例如0的加法或减法或0位的移位。

50. 发明申请

US20070297503A1 Efficient Fixed-Point Approximations of Forward and Inverse Discrete Cosine Transforms 失效
标题翻译：前向和反向离散余弦变换的有效定点近似
公开(公告)号：US20070297503A1
公开(公告)日：2007-12-27
申请号：US11766739
申请日：2007-06-21
申请人： Yuriy Reznik
发明人： Yuriy Reznik
IPC分类号： H04B1/66
CPC分类号： G06F17/147 , H04N19/60 , H04N19/61
摘要： Techniques are described to approximate computation of an inverse discrete cosine transform using fixed-point calculations. According to these techniques, matrixes of scaled coefficients are generated by multiplying coefficients in matrixes of encoded coefficients by scale factors. Next, matrixes of biased coefficients are generated by adding a midpoint bias value to a DC coefficient of the matrix of scaled coefficients. Fixed-point arithmetic is then used to apply a transform to the matrixes of biased coefficients. Values in the resulting matrixes are then right-shifted in order to derive matrixes of pixel component values. Matrixes of pixel component values are then combined to create matrixes of pixels. The matrixes of pixels generated by these techniques closely resemble matrixes of pixels decompressed using the ideal inverse discrete cosine transform (“IDCT”).
摘要翻译：描述了使用定点计算近似计算逆离散余弦变换的技术。根据这些技术，通过将编码系数的矩阵中的系数乘以比例因子来生成缩放系数的矩阵。接下来，通过将中点偏置值添加到缩放系数的矩阵的DC系数来生成偏置系数的矩阵。然后使用定点算术将变换应用于偏置系数的矩阵。然后将所得到的矩阵中的值右移，以便导出像素分量值的矩阵。然后组合像素分量值的矩阵以创建像素矩阵。由这些技术生成的像素矩阵与使用理想的反离散余弦变换（“IDCT”）解压缩的像素的矩阵非常相似。

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