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1. 发明申请

US20070150272A1 Correlating and decorrelating transforms for multiple description coding systems 有权
标题翻译：多个描述编码系统的相关和去相关变换
公开(公告)号：US20070150272A1
公开(公告)日：2007-06-28
申请号：US11312230
申请日：2005-12-19
申请人： Corey Cheng , Claus Bauer
发明人： Corey Cheng , Claus Bauer
IPC分类号： G10L19/00
CPC分类号： G10L19/005 , H03M7/30
摘要： Transmitters and receivers in multiple description coding systems use correlating and decorrelating transforms to generate and process multiple descriptions of elements of an input signal. The multiple descriptions include groups of correlating transform coefficients that permit recovery of an inexact facsimile of the original signal if some of the correlating transform coefficients are lost or corrupted during transmission. Noiseless implementations of the correlating and decorrelating transforms are described that allow the signal elements to be quantized with different quantizing resolutions. Implementations using the Fast Hadamard Transform are described that reduce the resources needed to perform the transforms.
摘要翻译：多描述编码系统中的发射器和接收器使用相关和去相关变换来产生和处理输入信号的元件的多个描述。多个描述包括相关变换系数组，其允许在传输期间某些相关变换系数丢失或损坏时恢复原始信号的不精确传真。描述相关和去相关变换的无噪声实现，其允许以不同的量化分辨率对信号元素进行量化。描述使用快速哈达玛变换的实现，减少执行转换所需的资源。

2. 发明申请

US20050165587A1 CODING TECHNIQUES USING ESTIMATED SPECTRAL MAGNITUDE AND PHASE DERIVED FROM MDCT COEFFICIENTS 有权
标题翻译：使用估计的光谱测量和从MDCT系数衍生的相位的编码技术
公开(公告)号：US20050165587A1
公开(公告)日：2005-07-28
申请号：US10766681
申请日：2004-01-27
申请人： Corey Cheng , Michael Smithers , David Lathrop
发明人： Corey Cheng , Michael Smithers , David Lathrop
IPC分类号： G06F17/14 , G06F15/00
CPC分类号： G06F17/147 , G10L19/0212
摘要： Estimates of spectral magnitude and phase are obtained by an estimation process using spectral information from analysis filter banks such as the Modified Discrete Cosine Transform. The estimation process may be implemented by convolution-like operations with impulse responses. Portions of the impulse responses may be selected for use in the convolution-like operations to trade off between computational complexity and estimation accuracy. Mathematical derivations of analytical expressions for filter structures and impulse responses are disclosed.
摘要翻译：通过使用来自分析滤波器组的光谱信息的估计处理（诸如修改的离散余弦变换）来获得频谱幅度和相位的估计。估计过程可以通过具有脉冲响应的卷积状操作来实现。可以选择脉冲响应的一部分用于卷积状操作以在计算复杂度和估计精度之间进行折衷。公开了滤波器结构和脉冲响应的解析表达式的数学推导。

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