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1. 发明授权

US06233718B1 Avoiding forbidden data patterns in coded audio data 有权
标题翻译：避免编码音频数据中的禁止数据模式
公开(公告)号：US06233718B1
公开(公告)日：2001-05-15
申请号：US09175090
申请日：1998-10-19
申请人： Stephen Decker Vernon , Louis Dunn Fielder , Mark Franklin Davis
发明人： Stephen Decker Vernon , Louis Dunn Fielder , Mark Franklin Davis
IPC分类号： G06F1100
CPC分类号： H04L25/03866 , H04L25/4906
摘要： Any of several information processing techniques may be used in various information storage and transmission applications to prevent the occurrence of certain “forbidden” bit patterns. According to an encoding technique, a reversible coding process is used to generate an encoded representation of an information stream that cannot contain any forbidden data patterns. This may be accomplished by partitioning the information stream into segments and encoding each segment according to a respective encoding key that is selected such that the results of the coding process cannot contain a forbidden data pattern. According to one substitution technique, all occurrences of forbidden data patterns are replaced with permissible data patterns that do not otherwise occur in the information stream. This may be accomplished by partitioning the information stream into segments, identifying an unused data pattern in a respective segment, and carrying out the replacement of all occurrences of the forbidden data pattern in that segment. According to another substitution technique, all occurrences of a forbidden data pattern are replaced by any permissible data pattern. This may be accomplished by partitioning the information stream into segments, identifying occurrences of the substitution data pattern and the forbidden data pattern in a respective segment, constructing a flag for each occurrence, and replacing all occurrences of the forbidden data pattern in that segment with the substitution data pattern. Decoding keys, substitution data patterns, substitution flags or any other information needed to recover the original information is assembled with the modified information in a form that does not equal the forbidden data pattern.
摘要翻译：可以在各种信息存储和传输应用中使用几种信息处理技术中的任何一种来防止某些“禁止”位模式的发生。根据编码技术，使用可逆编码处理来生成不能包含任何禁止数据模式的信息流的编码表示。这可以通过将信息流分割成段并根据选择的相应编码密钥对每个段进行编码，使得编码处理的结果不能包含禁止的数据模式来实现。根据一种替代技术，所有出现的禁止数据模式都被替换为不能在信息流中出现的允许数据模式。这可以通过将信息流分割成段，识别相应段中未使用的数据模式，并执行在该段中的所有出现的禁止数据模式的替换来实现。根据另一替代技术，所有出现的禁止数据模式都被任何允许的数据模式所取代。这可以通过将信息流划分成段，识别替代数据模式和禁止数据模式在相应段中的出现，为每次出现构建标志，并且替换该段中的所有禁止数据模式的出现替代数据模式。解码密钥，替代数据模式，替换标志或恢复原始信息所需的任何其他信息以不等于禁止数据模式的形式与修改的信息进行组合。

2. 发明授权

US06446037B1 Scalable coding method for high quality audio 有权
标题翻译：可扩展编码方法，用于高质量音频
公开(公告)号：US06446037B1
公开(公告)日：2002-09-03
申请号：US09370562
申请日：1999-08-09
申请人： Louis Dunn Fielder , Stephen Decker Vernon
发明人： Louis Dunn Fielder , Stephen Decker Vernon
IPC分类号： G10L1902
CPC分类号： G10L19/0208
摘要： Scalable coding of audio into a core layer in response to a desired noise spectrum established according to psychoacoustic principles supports coding augmentation data into augmentation layers in response to various criteria including offset of such desired noise spectrum. Compatible decoding provides a plurality of decoded resolutions from a single signal. Coding is preferably performed on subband signals generated according to spectral transform, quadrature mirror filtering, or other conventional processing of audio input. A scalable data structure for audio transmission includes core and augmentation layers, the former for carrying a first coding of an audio signal that places post decode noise beneath a desired noise spectrum, the later for carrying offset data regarding the desired noise spectrum and data about coding of the audio signal that places post decode noise beneath the desired noise spectrum shifted by the offset data.
摘要翻译：响应于根据心理声学原理建立的期望的噪声频谱将音频可扩展编码到核心层中，响应于包括这些期望的噪声谱的偏移的各种标准支持将增强数据编码到增强层中。兼容解码从单个信号提供多个解码分辨率。优选对根据频谱变换，正交镜滤波或音频输入的其它常规处理产生的子带信号执行编码。用于音频传输的可扩展数据结构包括核心和增强层，前者用于承载将后解码噪声放置在期望的噪声频谱之下的音频信号的第一编码，稍后用于承载关于期望的噪声谱的偏移数据和关于编码的数据将后解码噪声放置在偏移数据移位的期望噪声谱之下的音频信号。

3. 发明授权

US06226608B1 Data framing for adaptive-block-length coding system 有权
标题翻译：自适应块长度编码系统的数据帧
公开(公告)号：US06226608B1
公开(公告)日：2001-05-01
申请号：US09239345
申请日：1999-01-28
申请人： Louis Dunn Fielder , Michael Mead Truman
发明人： Louis Dunn Fielder , Michael Mead Truman
IPC分类号： G10L1900
CPC分类号： G10L19/022
摘要： An audio encoder applies an adaptive block-encoding process to segments of audio information to generate frames of encoded information that are aligned with a reference signal conveying the alignment of a sequence of video information frames. The audio information is analyzed to determine various characteristics of the audio signal such as the occurrence and location of a transient, and a control signal is generated that causes the adaptive block-encoding process to encode segments of varying length. A complementary decoder applies an adaptive block-decoding process to recover the segments of audio information from the frames of encoded information. In embodiments that apply time-domain aliasing cancellation (TDAC) transforms, window functions and transforms are applied according to one of a plurality of segment patterns that define window functions and transform parameters for each segment in a sequence of segments. The segments in each frame of a sequence of overlapping frames may be recovered without aliasing artifacts independently from the recovery of segments in other frames. Window functions are adapted to provide preferred frequency-domain responses and time-domain gain profiles.
摘要翻译：音频编码器对音频信息的段应用自适应块编码处理，以产生与传送视频信息帧序列的对准的参考信号对准的编码信息帧。分析音频信息以确定音频信号的各种特征，例如瞬态的发生和位置，并且生成控制信号，其使自适应块编码处理编码不同长度的片段。互补解码器应用自适应块解码过程以从编码信息的帧中恢复音频信息的段。在应用时域混叠消除（TDAC）变换的实施例中，窗口函数和变换根据多个段模式中的一个来应用，这些段模式定义了窗口函数，并且对于段序列中的每个段进行变换参数。重叠帧序列的每个帧中的片段可以在不与其他帧中的片段的恢复独立的情况下被恢复而不产生伪像。窗口功能适于提供优选的频域响应和时域增益曲线。

4. 发明授权

US5752225A Method and apparatus for split-band encoding and split-band decoding of audio information using adaptive bit allocation to adjacent subbands 失效
标题翻译：用于对相邻子带进行自适应位分配的分离带编码和音频信息的分频解码的方法和装置
公开(公告)号：US5752225A
公开(公告)日：1998-05-12
申请号：US481638
申请日：1995-06-07
申请人： Louis Dunn Fielder
发明人： Louis Dunn Fielder
IPC分类号： G06T9/00 , G10L19/14 , H04B1/66 , G10L7/02
CPC分类号： G06T9/005 , G10L19/0212 , G10L19/16 , H04B1/665
摘要： A split-band encoder and a split-band decoder use adaptive bit allocation to achieve high-quality audio coding at low bit rates. Bits are adaptively allocated to one or two subbands adjacent to a given subband based on signal levels in the given subband.
摘要翻译：分频编码器和分频带解码器使用自适应位分配来实现低比特率的高质量音频编码。基于给定子带中的信号电平，位自适应地分配给与给定子带相邻的一个或两个子带。

5. 发明授权

US06449368B1 Multidirectional audio decoding 失效
标题翻译：多向音频解码
公开(公告)号：US06449368B1
公开(公告)日：2002-09-10
申请号：US08819582
申请日：1997-03-14
申请人： Mark Franklin Davis , Louis Dunn Fielder , Matthew Conrad Fellers
发明人： Mark Franklin Davis , Louis Dunn Fielder , Matthew Conrad Fellers
IPC分类号： H04R500
CPC分类号： H04S1/002
摘要： An audio crosstalk-cancelling network that may be implemented in software, such that when run in real time on a personal computer, the canceller has very low mips requirements and uses a small fraction of available CPU cycles. The network is particularly useful for rendering surround sound images outside the space between left and right computer multimedia loudspeakers when the audio from such sources is reproduced. The network includes two signal feedback paths, each feedback path having a time delay and frequency dependent characteristic. The frequency dependent characteristic represents the smoothed difference in the attenuation in the acoustic path between a transducer and the listener's ear farthest from said transducer and the attenuation in the acoustic path between the same transducer and the listener's ear closest to said same transducer. The smoothed difference in the attenuation is implemented by one or more simple digital filters requiring low processing power.
摘要翻译：可以以软件实现的音频串扰消除网络，使得当在个人计算机上实时运行时，消除器具有非常低的芯片要求，并且使用可用CPU周期的一小部分。当再现来自这些源的音频时，网络对于在左和右计算机多媒体扬声器之间的空间之外渲染环绕声图像特别有用。网络包括两个信号反馈路径，每个反馈路径具有时间延迟和频率相关特性。频率依赖特性表示换能器与距离所述换能器最远的收听者的耳朵之间的声学路径中的衰减的平滑差异以及相同换能器与最接近所述相同换能器的收听者耳朵之间的声学路径中的衰减。平滑的衰减差异由一个或多个需要低处理能力的简单数字滤波器来实现。

6. 发明授权

US6124895A Frame-based audio coding with video/audio data synchronization by dynamic audio frame alignment 失效
标题翻译：基于帧的音频编码与视频/音频数据同步通过动态音频帧对齐
公开(公告)号：US6124895A
公开(公告)日：2000-09-26
申请号：US953618
申请日：1997-10-17
申请人： Louis Dunn Fielder
发明人： Louis Dunn Fielder
IPC分类号： G10L11/00 , G11B20/10 , G11B27/02 , G11B27/031 , G11B27/038 , H03M7/30 , H04B14/04 , H04N9/475
CPC分类号： G11B27/038 , G11B20/10527 , G11B27/031
摘要： Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.
摘要翻译：可以以各种组合使用多种音频信号处理技术来提高由拼接编辑两个或多个其它信息流形成的信息流所表示的音频的质量。这些技术在将音频信息与视频信息捆绑在一起的应用中特别有用。在一种技术中，利用音频信息流传送的增益控制字用于跨拼接插值重放声级。在另一种技术中，使用特殊的滤波器组或TDAC变换形式来抑制拼接两侧的混叠伪像。在另一种技术中，使用特殊的滤波器组或交叉渐变窗函数来优化在接头处产生的频谱飞溅的衰减。在另一种技术中，根据帧长度和速率来转换音频采样率，以允许音频信息与例如视频信息捆绑在一起。在另一种技术中，音频块被动态对齐，使得能够跨拼接维持适当的同步。讨论了具有NTSC视频的48 kHz音频的示例。

7. 发明授权

US5913191A Frame-based audio coding with additional filterbank to suppress aliasing artifacts at frame boundaries 失效
标题翻译：具有附加滤波器组的基于帧的音频编码，以在帧边界处抑制混叠伪像
公开(公告)号：US5913191A
公开(公告)日：1999-06-15
申请号：US953121
申请日：1997-10-17
申请人： Louis Dunn Fielder
发明人： Louis Dunn Fielder
IPC分类号： G10L19/00 , G10L19/02 , G11B20/10 , G11B27/02 , H03H17/02 , H04B1/66 , G10L7/04
CPC分类号： G11B20/10 , G10L19/0204 , G10L25/18
摘要： Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.
摘要翻译：可以以各种组合使用多种音频信号处理技术来提高由拼接编辑两个或多个其它信息流形成的信息流所表示的音频的质量。这些技术在将音频信息与视频信息捆绑在一起的应用中特别有用。在一种技术中，利用音频信息流传送的增益控制字用于跨拼接插值重放声级。在另一种技术中，使用特殊的滤波器组或TDAC变换形式来抑制拼接两侧的混叠伪像。在另一种技术中，使用特殊的滤波器组或交叉渐变窗函数来优化在接头处产生的频谱飞溅的衰减。在另一种技术中，根据帧长度和速率来转换音频采样率，以允许音频信息与例如视频信息捆绑在一起。在另一种技术中，音频块被动态对齐，使得能够跨拼接维持适当的同步。讨论了具有NTSC视频的48 kHz音频的示例。

8. 发明授权

US06188987B1 Providing auxiliary information with frame-based encoded audio information 有权
标题翻译：提供基于帧的编码音频信息的辅助信息
公开(公告)号：US06188987B1
公开(公告)日：2001-02-13
申请号：US09193186
申请日：1998-11-17
申请人： Louis Dunn Fielder
发明人： Louis Dunn Fielder
IPC分类号： G10L1900
CPC分类号： H04N21/2383 , H04N21/2335 , H04N21/23602 , H04N21/23614 , H04N21/2368 , H04N21/242 , H04N21/4302 , H04N21/4341 , H04N21/4342 , H04N21/4348 , H04N21/4382
摘要： Blocks of encoded audio information are arranged in frames separated by gaps or guard bands that are aligned with frames of video information. The gaps are provided to protect the audio information against corruption caused by uncertainties or jitter in editing operations such as switching between two difference sources of video/audio information. The otherwise wasted space or bandwidth required to convey the gaps is utilized by conveying encoded segments of auxiliary information. When the encoded auxiliary information is subsequently decoded, an error recovery process provides substitute information for those segments that are corrupted by an editing operation. In one embodiment, the recovery process is adapted according to the choice of an auxiliary sync word conveyed in the segment.
摘要翻译：编码音频信息的块被排列成与由视频信息的帧对准的间隙或保护带隔开的帧。提供间隙以保护音频信息免受由于编辑操作中的不确定性或抖动引起的损坏，例如在两个不同的视频/音频信息源之间切换。通过传递辅助信息的编码段来利用传送间隙所需的浪费的空间或带宽。随后编码的辅助信息被解码时，错误恢复处理为那些被编辑操作所损坏的段提供替代信息。在一个实施例中，恢复过程根据在段中传送的辅助同步字的选择进行调整。

9. 发明授权

US5913190A Frame-based audio coding with video/audio data synchronization by audio sample rate conversion 失效
标题翻译：基于帧的音频编码与视频/音频数据同步通过音频采样率转换
公开(公告)号：US5913190A
公开(公告)日：1999-06-15
申请号：US953306
申请日：1997-10-17
申请人： Louis Dunn Fielder , Craig Campbell Todd
发明人： Louis Dunn Fielder , Craig Campbell Todd
IPC分类号： G10L11/00 , G11B20/10 , G11B27/02 , G11B27/031 , G11B27/038 , H03M7/30 , H04B14/04 , G01L3/00
CPC分类号： G11B27/031 , G11B20/10527 , G11B27/038
摘要： Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.
摘要翻译：可以以各种组合使用多种音频信号处理技术来提高由拼接编辑两个或多个其它信息流形成的信息流所表示的音频的质量。这些技术在将音频信息与视频信息捆绑在一起的应用中特别有用。在一种技术中，利用音频信息流传送的增益控制字用于跨拼接插值重放声级。在另一种技术中，使用特殊的滤波器组或TDAC变换形式来抑制拼接两侧的混叠伪像。在另一种技术中，使用特殊的滤波器组或交叉渐变窗函数来优化在接头处产生的频谱飞溅的衰减。在另一种技术中，根据帧长度和速率来转换音频采样率，以允许音频信息与例如视频信息捆绑在一起。在另一种技术中，音频块被动态对齐，使得能够跨拼接维持适当的同步。讨论了具有NTSC视频的48 kHz音频的示例。

10. 发明授权

US5903872A Frame-based audio coding with additional filterbank to attenuate spectral splatter at frame boundaries 失效
标题翻译：具有附加滤波器组的基于帧的音频编码，以衰减帧边界处的频谱飞溅
公开(公告)号：US5903872A
公开(公告)日：1999-05-11
申请号：US953106
申请日：1997-10-17
申请人： Louis Dunn Fielder
发明人： Louis Dunn Fielder
IPC分类号： G11B20/10 , G10L19/00 , G11B27/02 , G11B27/031 , H03H17/00 , H03H17/02 , H03M7/30 , H04B14/04 , G10L3/00
CPC分类号： G11B27/031
摘要： Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.
摘要翻译：可以以各种组合使用多种音频信号处理技术来提高由拼接编辑两个或多个其它信息流形成的信息流所表示的音频的质量。这些技术在将音频信息与视频信息捆绑在一起的应用中特别有用。在一种技术中，利用音频信息流传送的增益控制字用于跨拼接插值重放声级。在另一种技术中，使用特殊的滤波器组或TDAC变换形式来抑制拼接两侧的混叠伪像。在另一种技术中，使用特殊的滤波器组或交叉渐变窗函数来优化在接头处产生的频谱飞溅的衰减。在另一种技术中，根据帧长度和速率来转换音频采样率，以允许音频信息与例如视频信息捆绑在一起。在另一种技术中，音频块被动态对齐，使得能够跨拼接维持适当的同步。讨论了具有NTSC视频的48 kHz音频的示例。

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