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公开(公告)号：US06366888B1
公开(公告)日：2002-04-02
申请号：US09280785
申请日：1999-03-29
申请人： Peter Kroon , Deepen Sinha
发明人： Peter Kroon , Deepen Sinha
IPC分类号： G10L1900
摘要： In a communications system, multi-rate coding in accordance with the invention is implemented to generate multiple representations of an audio signal at different rates. These representations contain equivalent and/or various amounts of audio information. In an illustrative embodiment, at least one of the representations is a core representation containing core audio information. The remaining representations are enhancement representations containing enhancement audio information. The core representation is necessary for recovering the audio signal with minimal acceptable quality. Such quality is enhanced when the core representation, together with one or more of the enhancement representations, is used to recover the audio signal.
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公开(公告)号：US06920422B2
公开(公告)日：2005-07-19
申请号：US10039458
申请日：2001-11-07
申请人： Peter Kroon , Deepen Sinha
发明人： Peter Kroon , Deepen Sinha
摘要： An apparatus for providing at least first and second representations of an audio signal for use in a communications system is described. The apparatus comprises a first quantizer for quantizing at least a portion of the signal in accordance with a first multidimensional lattice to generate a first representation. The apparatus further comprises a second quantizer for quantizing at least a portion of the signal in accordance with a second, different multidimensional lattice to generate a second representation. In an illustrative embodiment, the first representation is a core representation containing core audio information. The second representation is an enhancement representation containing enhancement audio information. The core representation is necessary for recovering the audio signal with minimal acceptable quality. Audio quality is enhanced when the core representation, together with the enhancement representation, is used to recover the audio signal. A method for use in such an apparatus is also described.
摘要翻译： 描述了一种用于提供用于通信系统中的音频信号的至少第一和第二表示的装置。 该装置包括第一量化器，用于根据第一多维晶格量化至少一部分信号以产生第一表示。 该装置还包括第二量化器，用于根据第二不同的多维网格对信号的至少一部分进行量化以产生第二表示。 在说明性实施例中，第一表示是包含核心音频信息的核心表示。 第二表示是包含增强音频信息的增强表示。 以最小可接受的质量恢复音频信号需要核心表示。 当使用核心表示以及增强表示来恢复音频信号时，音频质量得到增强。 还描述了在这种装置中使用的方法。
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公开(公告)号：US20070118361A1
公开(公告)日：2007-05-24
申请号：US11544894
申请日：2006-10-06
申请人： Deepen Sinha , Anibal Ferreira
发明人： Deepen Sinha , Anibal Ferreira
IPC分类号： G10L19/14
CPC分类号： G10L25/48 , G10L19/022
摘要： An envelope for a window function establishes (a) a power complementary condition, and (b) at least a first derivative (or higher order) that is continuous. The window function is developed from samples of the envelope. This discrete window function has a predetermined domain. The window function can be embodied as a windowing device receiving signals from a discrete signal source. This windowing device can adjust values from the discrete signal source according to the window function. A utilization device can use the adjusted values from said windowing device.
摘要翻译： 用于窗口函数的包络确定（a）功率互补条件，以及（b）至少是连续的一阶导数（或更高阶）。 窗口函数是从信封的样本开发的。 该离散窗函数具有预定域。 窗口功能可以被实现为从离散信号源接收信号的加窗装置。 该窗口装置可以根据窗口功能调整离散信号源的值。 利用装置可以使用来自所述加窗装置的调整值。
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4.发明授权Efficient coding of high frequency signal information in a signal using a linear/non-linear prediction model based on a low pass baseband 有权使用基于低通基带的线性/非线性预测模型对信号中的高频信号信息进行高效编码公开(公告)号：US07191136B2
公开(公告)日：2007-03-13
申请号：US10261454
申请日：2002-10-01
申请人： Deepen Sinha , Masoud Alghoniemy , Lin Lin , Alex Cabanilla
发明人： Deepen Sinha , Masoud Alghoniemy , Lin Lin , Alex Cabanilla
IPC分类号： G10L19/00
CPC分类号： G10L19/0208 , G10L19/04
摘要： An efficient coding scheme with higher audio bandwidth and/or better audio quality at lower bitrates, wherein the scheme eliminates long-term and short-term frequency domain correlation in a signal via frequency domain predictors. The coding scheme compresses information consisting of coded low frequency components as well as a parametric representation for the high frequency components based on a non-linear model. Additionally, by working on the frequency domain representations of the signal (such as the MDCT representation which is naturally available to a PAC encoder and decoder), low pass and high pass signal components are easily obtained by windowing the appropriate ranges of frequencies in the signal. Furthermore, the power functions of the signal are replaced by corresponding convolution functions of the same order.
摘要翻译： 具有较低音频带宽和/或较低音频质量的高效编码方案，其中该方案通过频域预测器消除信号中的长期和短期频域相关。 编码方案基于非线性模型压缩由编码的低频分量组成的信息以及用于高频分量的参数表示。 另外，通过对信号的频域表示（诸如PAC编码器和解码器自然可用的MDCT表示）进行工作，可以通过在信号中开启适当的频率范围来容易地获得低通和高通信号分量 。 此外，信号的功率函数由相同顺序的相应卷积函数代替。
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5.发明授权公开(公告)号：US06813600B1
公开(公告)日：2004-11-02
申请号：US09656743
申请日：2000-09-07
IPC分类号： G10L1900
CPC分类号： G10L19/18
摘要： Audio tracks or other portions of a particular type of audio material to be encoded are analyzed to determine a value of at least one coding-related parameter suitable for providing optimal encoding of the particular type of audio material. When a given portion of the audio material is to be encoded for transmission in a perceptual audio coder of a communication system, the value of the coding-related parameter is identified and then utilized in conjunction with the encoding of the given portion. The determined value of the coding-related parameter may be at least a portion of a psychoacoustic model utilized in encoding the given portion of the particular type of audio material in the perceptual audio coder. As another example, the value of the coding-related parameter may be a setting of an audio processor utilized to process the given portion of the particular type of audio material prior to encoding the given portion in the perceptual audio coder.
摘要翻译： 分析要编码的特定类型的音频材料的音频轨道或其他部分以确定适于提供特定类型的音频材料的最佳编码的至少一个编码相关参数的值。 当音频材料的给定部分被编码用于在通信系统的感知音频编码器中传输时，识别编码相关参数的值，然后结合给定部分的编码而使用该值。 编码相关参数的确定值可以是在感知音频编码器中对特定类型的音频材料的给定部分进行编码中使用的心理声学模型的至少一部分。 作为另一示例，编码相关参数的值可以是在对感知音频编码器中的给定部分进行编码之前用于处理特定类型的音频素材的给定部分的音频处理器的设置。
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公开(公告)号：US06405338B1
公开(公告)日：2002-06-11
申请号：US09022114
申请日：1998-02-11
IPC分类号： H03M1300
CPC分类号： H04L1/007 , G10L19/002 , H04L1/0057 , H04L1/0059 , H04L1/0072
摘要： An audio information bit stream including audio control bits and audio data bits is processed for transmission in a communication system. The audio data bits are first separated into n classes based on error sensitivity, that is, the impact of errors in particular audio data bits on perceived quality of an audio signal reconstructed from the transmission. Each of the n different classes of audio data bits is then provided with a corresponding one of n different levels of error protection, where n is greater than or equal to two. The invention thereby matches error protection for the audio data bits to source and channel error sensitivity. The audio control bits may be transmitted independently of the audio data bits, using an additional level of error protection higher than that used for any of the n classes of the audio data bits. Alternatively, the control bits may be combined with one of the n classes of audio data bits and provided with the highest of the n levels of error protection. Further protection may be provided for the control bits by repeating at least a portion of the control bits from a current packet of the audio information bit stream in a subsequent packet of the audio information bit stream. Moreover, the classification of audio data bits into n different classes can be implemented on a fixed packet-by-packet basis, or in a more flexible, adaptive implementation in which different multipacket error protection profiles are used for different multipacket segments of a source-coded audio signal.
摘要翻译： 包括音频控制位和音频数据位的音频信息比特流被处理以在通信系统中传输。 音频数据位首先基于错误灵敏度被分为n类，即特定音频数据位中的错误对从传输重建的音频信号的感知质量的影响。 然后，n个不同类别的音频数据位中的每一个都具有n个不同级别的错误保护中的相应的一个，其中n大于或等于2。 因此，本发明将音频数据位的误差保护与源和通道误差灵敏度相匹配。 音频控制位可以独立于音频数据位发送，使用高于用于音频数据位的n个类中的任何一个的附加级别的错误保护。 或者，控制位可以与n类音频数据位中的一个组合，并且具有n级错误保护中的最高级。 可以通过在音频信息比特流的后续分组中从音频信息比特流的当前分组重复控制比特的至少一部分来为控制比特提供进一步的保护。 此外，音频数据比特到n个不同类别的分类可以在固定的逐个分组的基础上实现，或者在更灵活的自适应实现中实现，其中不同的多包误差保护简档用于源 - 编码音频信号。
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7.发明授权公开(公告)号：US06961432B1
公开(公告)日：2005-11-01
申请号：US09454027
申请日：1999-12-03
CPC分类号： H04H20/88 , H04H20/22 , H04H20/74 , H04L1/0065
摘要： In a digital audio broadcast system, to utilize transmission bandwidth efficiently, representations of a stereo audio signal for transmission are generated in accordance with an inventive multidescriptive coding technique. The representations, as generated, are then transmitted through multiple communication channels, respectively. The transmitted representations are received by a receiver where one or more of the representations are selected for recovery of the stereo audio signal. Because of the design of the multidescriptive coding used, the more representations are selected to recover the stereo audio signal, the higher the quality of the recovered signal.
摘要翻译： 在数字音频广播系统中，为了有效地利用传输带宽，根据本发明的多指令编码技术产生用于传输的立体声音频信号的表示。 所生成的表示分别通过多个通信信道发送。 发送的表示由接收机接收，其中一个或多个表示被选择用于恢复立体声音频信号。 由于使用了多重编码编码的设计，选择更多的表示来恢复立体声音频信号，恢复信号的质量越高。
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8.发明授权Channel code configurations for digital audio broadcasting systems and other types of communication systems 有权数字音频广播系统和其他类型通信系统的频道码配置公开(公告)号：US06587826B1
公开(公告)日：2003-07-01
申请号：US09464043
申请日：1999-12-15
IPC分类号： G10L2104
CPC分类号： H04L1/0065 , H04L1/004 , H04L1/0071 , H04L1/0078
摘要： Improved channel code configurations for use in transmission of digital audio or other types of information in a digital communication system. The channel code may include an outer channel code, e.g., a cyclic redundancy code (CRC), and an inner channel code, e.g., a complementary punctured pair convolutional (CPPC) code. In accordance with the invention, multiple code words of the outer code are associated with a given packet of the digital information, in accordance with a particular outer code configuration, so as to provide partial error flagging for different portions of the given packet. An information encoder, e.g., a PAC encoder, interacts with an outer code encoder to determine a bit allocation for transmission of packets at a particular bit rate, based at least in part on the outer code configuration. The invention is particularly well-suited for use in the transmission of digital audio information in a hybrid in-band on-channel (HIBOC) digital audio broadcasting (DAB) system, but is also applicable to other types of communication systems.
摘要翻译： 用于在数字通信系统中传输数字音频或其他类型的信息的改进的信道码配置。 信道码可以包括外部信道码，例如循环冗余码（CRC）和内部信道码，例如互补的穿孔对卷积码（CPPC）码。 根据本发明，根据特定的外部代码配置，外部代码的多个代码字与数字信息的给定分组相关联，以便为给定分组的不同部分提供部分错误标记。 信息编码器，例如PAC编码器，与外码编码器交互，以至少部分地基于外码配置来确定用于以特定比特率传输分组的比特分配。 本发明特别适用于在混合带内通道（HIBOC）数字音频广播（DAB）系统中传输数字音频信息，但也适用于其他类型的通信系统。
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9.发明授权公开(公告)号：US06357029B1
公开(公告)日：2002-03-12
申请号：US09238138
申请日：1999-01-27
IPC分类号： H03M1300
CPC分类号： H04L1/0083 , H04H2201/17 , H04H2201/20 , H04L1/0054 , H04L1/0065 , H04L1/0071 , H04L1/08
摘要： Methods and apparatus for processing information, e.g., audio, video or image information, for transmission in a communication system are disclosed. In an illustrative embodiment, a multiple program coder encodes a bitstream for each of the programs, in accordance with a specified bit allocation. An outer code encoder receives the encoded bitstreams from the multiple program coder, and jointly applies an outer code, e.g., a CRC code, RS code, BCH code or other type of linear block code, to subblocks of a subset of the resulting encoded bitstreams. The outer code is applied such that subblocks of each of the encoded bitstreams in the subset of the encoded bitstrcams are associated with a single outer code block. The number of subblocks associated with a given outer code block may be an integer or non-integer number of code blocks. The invention allows a designated number of program subblocks to share a given outer code block, such that outer code error flags can be generated for smaller groups of bits per program than would otherwise be possible. An inner code encoder may be used to apply an inner code, e.g., a convolutional code, turbo code or trellis coded modulation, to the resulting outer code blocks.
摘要翻译： 公开了用于处理用于在通信系统中传输的信息的方法和装置，例如音频，视频或图像信息。 在说明性实施例中，多程序编码器根据指定的位分配对每个程序的比特流进行编码。 外码编码器从多节目编码器接收编码的比特流，并且将外码（例如，CRC码，RS码，BCH码或其他类型的线性块码）联合应用于所得编码比特流的子集的子块 。 应用外部代码，使得编码比特率的子集中的每个编码比特流的子块与单个外部码块相关联。 与给定外部码块相关联的子块的数量可以是整数或非整数个码块。 本发明允许指定数量的程序子块共享给定的外部码块，使得可以针对比其他情况下可能的每个节目的较小比特组生成外部码错误标志。 内码编码器可以用于将内码（例如，卷积码，turbo码或网格编码调制）应用于所得到的外码块。
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10.发明授权Unequal error protection for digital broadcasting using channel classification 有权使用信道分类的数字广播不平等的错误保护公开(公告)号：US06292917B1
公开(公告)日：2001-09-18
申请号：US09163656
申请日：1998-09-30
IPC分类号： H03M1300
CPC分类号： H04L1/0059 , H04L1/0068 , H04L1/007 , H04L27/2602 , H04L2001/0096 , H04L2001/0098
摘要： The invention provides methods and apparatus for processing information, e.g., audio, video or image information, for transmission in a communication system. In an illustrative embodiment, interference characteristics are determined for a set of n channels to be used to transmit audio information bits, where n is greater than or equal to two. The audio information bits are separated into n classes based on error sensitivity, for example, the impact of errors in particular audio data bits on perceived quality of an audio signal reconstructed from the transmission. The classes of bits are then assigned to the n channels such that the classes of bits having the greatest error sensitivity are transmitted over the channels which are the least susceptible to interference. The interference characteristics associated with the n channels can be determined by, for example, measuring interference levels for one or more of the channels, or obtaining information regarding known interference levels for one or more of the channels. The channels may correspond to different frequency bands, time slots, code division slots or any other type of channels. The invention can provide UEP for different classes of audio information bits even in cases in which the same convolutional code, or the same complementary punctured pair convolutional (CPPC) code pair, is used to encode the classes. The assignment of the classes of bits to the channels, as well as the characteristics of the classes and the channels, may be fixed or dynamic.
摘要翻译： 本发明提供了用于处理用于在通信系统中传输的信息（例如，音频，视频或图像信息）的方法和装置。 在说明性实施例中，针对要用于发送音频信息比特的一组n个信道确定干扰特性，其中n大于或等于2。 基于错误灵敏度将音频信息比特分为n类，例如，特定音频数据比特中的错误对从传输重建的音频信号的感知质量的影响。 然后将这些位分配给n个通道，使得具有最大误差灵敏度的位的类别通过最不易受干扰的信道进行传输。 可以通过例如测量一个或多个信道的干扰电平或获得关于一个或多个信道的已知干扰电平的信息来确定与n个信道相关联的干扰特性。 信道可以对应于不同的频带，时隙，码分时隙或任何其它类型的信道。 即使在使用相同卷积码或相同的互补穿孔对卷积（CPPC）码对来对类进行编码的情况下，本发明也可以为不同类别的音频信息比特提供UEP。 对通道的位类的分配以及类和通道的特性可以是固定的或动态的。
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