公开(公告)号：US06982377B2

公开(公告)日：2006-01-03

申请号：US10739632

申请日：2003-12-18

申请人： Atsuhiro Sakurai ,  Steven Trautmann ,  Daniel L. Zelazo

发明人： Atsuhiro Sakurai ,  Steven Trautmann ,  Daniel L. Zelazo

IPC分类号： G10H5/00

CPC分类号： G10H1/125 ,  G10H2240/061

摘要： A time scale modification method employs separate bands obtained through an analysis polyphase filter bank with separate time-scale modification processing for the bands. The outputs are combined using a synthesis filter bank. Some constraints are imposed on the time-scale modification processing, such a limitation of the range of overlap adjustment values for bands other than the greatest energy band, to eliminate noise due to aliasing and inter-channel phase mismatch. This invention produces output quality considerably higher than conventional time-domain time-scale modification methods for general music signals with computational requirements comparable to those of conventional time-domain time-scale modification methods.

摘要翻译： 时间尺度修正方法采用通过分析多相滤波器组获得的分离带，对带进行单独的时间尺度修正处理。 输出使用合成滤波器组合成。 对时间尺度修改处理施加了一些约束，这是对最大能带以外的频带的重叠调整值的范围的限制，以消除由于混叠和信道间相位失配引起的噪声。 本发明产生的输出质量明显高于用于一般音乐信号的常规时域时间尺度修改方法，其计算要求与常规时域时间尺度修改方法相当。

公开(公告)号：US07890335B2

公开(公告)日：2011-02-15

申请号：US10269894

申请日：2002-10-10

申请人： Daniel L. Zelazo ,  Steven D. Trautmann

发明人： Daniel L. Zelazo ,  Steven D. Trautmann

IPC分类号： G10L19/00

CPC分类号： G06F17/148 ,  G10L19/0216

摘要： A system for sharing wavelet domain components among encoded signals receives a set of signals decomposed and encoded according to a wavelet transform. The decomposed and encoded signals each include a set of wavelet coefficients at each level of the decomposition of the encoded signal. Using a vector quantization technique, the system identifies one or more sets of wavelet coefficients that are sharable among two or more of the decomposed and encoded signals at a particular level of decomposition. The system then stores the sets of wavelet coefficients of the decomposed and encoded signals. Each identified sharable set of wavelet coefficients at a particular level of decomposition is stored only once and shared by two or more of the decomposed and encoded signals.

摘要翻译： 用于在编码信号中共享小波域分量的系统接收根据小波变换分解和编码的一组信号。 分解和编码的信号各自包括在编码信号的分解的每个级别处的一组小波系数。 使用矢量量化技术，系统识别在特定分解级别的两个或多个分解和编码信号之间可共享的一组或多组小波系数。 然后，系统存储分解和编码信号的小波系数集合。 在特定分解级别的每个识别的可共享小波系数集合仅被存储一次并由两个或更多个分解和编码信号共享。

公开(公告)号：US07062430B2

公开(公告)日：2006-06-13

申请号：US10226772

申请日：2002-08-23

申请人： Daniel L. Zelazo

发明人： Daniel L. Zelazo

IPC分类号： G10L19/00 ,  G10L21/00 ,  G06F17/10

CPC分类号： H03H17/0266

摘要： A signal processing device includes a biorthogonal filter bank that processes a finite length signal including a left boundary and a right boundary. The biorthogonal filter bank includes an analysis filter bank. The analysis filter bank includes one or more left boundary filters, one or more right boundary filters, and one or more steady-state analysis filters. Each left boundary filter and each right boundary filter includes a row vector. The left and right boundary filters have been designed by generating, from the steady-state analysis filters, an analysis matrix representing the analysis filter bank, multiplying the analysis matrix by a permutation matrix to generate a permutated analysis matrix, truncating the permutated analysis matrix to a degree to generate a rectangular truncated analysis matrix, and selecting a number of left boundary filters and a number of right boundary filters such that, when the row vectors corresponding to the number of left boundary filters and the number of right boundary filters are added to the truncated analysis matrix, the truncated analysis matrix becomes square. Each row vector added to the truncated analysis matrix lies outside a row space of the truncated analysis matrix such that a row vector specifies a permissible design for a boundary filter. The biorthogonal filter bank also includes a synthesis filter bank corresponding to the analysis filter bank. The synthesis filter bank includes a number of left boundary filters, a number of right boundary filters, and a number of steady-state synthesis filters. A synthesis matrix specifies the left boundary filters, right boundary filters, and steady-state synthesis filters of the synthesis filter bank. The synthesis matrix has been created by calculating the dual, or inverse, of the square analysis matrix.

摘要翻译： 信号处理装置包括处理包括左边界和右边界的有限长度信号的双正交滤波器组。 双正交滤波器组包括分析滤波器组。 分析滤波器组包括一个或多个左边界滤波器，一个或多个右边界滤波器以及一个或多个稳态分析滤波器。 每个左边界滤波器和每个右边界滤波器包括一个行向量。 已经通过从稳态分析滤波器生成表示分析滤波器组的分析矩阵来设计左边界和右边界滤波器，将分析矩阵乘以置换矩阵以产生置换分析矩阵，截断置换的分析矩阵 生成矩形截断分析矩阵的程度，以及选择左边界滤波器和多个右边界滤波器的数量，使得当将与左边界滤波器的数量和右边界滤波器的数量相对应的行向量被添加到 截断分析矩阵，截断分析矩阵变为平方。 添加到截断分析矩阵中的每行向量位于截断分析矩阵的行空间之外，使得行向量指定边界过滤器的允许设计。 双正交滤波器组还包括对应于分析滤波器组的合成滤波器组。 合成滤波器组包括多个左边界滤波器，多个右边界滤波器和多个稳态合成滤波器。 合成矩阵指定合成滤波器组的左边界滤波器，右边界滤波器和稳态合成滤波器。 合成矩阵是通过计算平方分析矩阵的双重或倒数得到的。

公开(公告)号：US07039665B2

公开(公告)日：2006-05-02

申请号：US10259676

申请日：2002-09-27

申请人： Daniel L. Zelazo ,  Steven D. Trautman

发明人： Daniel L. Zelazo ,  Steven D. Trautman

IPC分类号： G06F17/10

CPC分类号： G06F17/10

摘要： Efficient reconstruction of a discrete signal in a range from subband coefficients of multirate analysis filtering translates the range into required input coefficient ranges and minimizes computation and memory access.

摘要翻译： 在多速率分析滤波的子带系数范围内对离散信号的有效重建将范围转换成所需的输入系数范围，并使计算和存储器访问最小化。