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1. 发明申请

WO2007120452A1 AUDIO SIGNAL LOUDNESS MEASUREMENT AND MODIFICATION IN THE MDCT DOMAIN 审中-公开
标题翻译：音频信号测量和修改在MDCT领域
公开(公告)号：WO2007120452A1
公开(公告)日：2007-10-25
申请号：PCT/US2007/007945
申请日：2007-03-30
申请人： DOLBY LABORATORIES LICENSING CORPORATION , SEEFELDT, Alan Jeffrey , CROCKETT, Brett Graham , SMITHERS, Michael John
发明人： SEEFELDT, Alan Jeffrey , CROCKETT, Brett Graham , SMITHERS, Michael John
IPC分类号： G10L19/00 , H04M3/22
CPC分类号： G10L25/69 , G10L19/0212
摘要： Processing an audio signal represented by the Modified Discrete Cosine Transform (MDCT) of a time-sampled real signal is disclosed in which the loudness of the transformed audio signal is measured, and at least in part in response to the measuring, the loudness of the transformed audio signal is modified. When gain modifying more than one frequency band, the variation or variations in gain from frequency band to frequency band, is smooth. The loudness measurement employs a smoothing time constant commensurate with the integration time of human loudness perception or slower.
摘要翻译：公开了处理由时间采样实信号的修正离散余弦变换（MDCT）表示的音频信号，其中测量变换音频信号的响度，并且至少部分地响应于测量，响度变换后的音频信号被修改。当增益改变多于一个频带时，从频带到频带的增益的变化或变化是平滑的。响度测量使用与人类响度感知的积分时间相对应的平滑时间常数或更慢。

2. 发明申请

WO2006006977A1 METHOD FOR CORRECTING METADATA AFFECTING THE PLAYBACK LOUDNESS AND DYNAMIC RANGE OF AUDIO INFORMATION 审中-公开
标题翻译：纠正影响播放声音的元音的方法和音频信息的动态范围
公开(公告)号：WO2006006977A1
公开(公告)日：2006-01-19
申请号：PCT/US2005/011862
申请日：2005-04-08
申请人： DOLBY LABORATORIES LICENSING CORPORATION , SMITHERS, Michael, John , RIEDMILLER, Jeffrey, Charles , ROBINSON, Charles, Quito , CROCKETT, Brett, Graham
发明人： SMITHERS, Michael, John , RIEDMILLER, Jeffrey, Charles , ROBINSON, Charles, Quito , CROCKETT, Brett, Graham
IPC分类号： H03G3/20
CPC分类号： H03G9/005 , G10L25/00
摘要： A coded signal conveys encoded audio information and metadata that may be used to control the loudness and dynamic range of the audio information during its playback. If the values for these metadata parameters are set incorrectly, annoying fluctuations in loudness during playback can result. The present invention overcomes this problem by detecting incorrect metadata parameter values in the signal and replacing the incorrect values with corrected values.
摘要翻译：编码信号传送编码的音频信息和元数据，其可用于在其播放期间控制音频信息的响度和动态范围。如果这些元数据参数的值设置不正确，则可能导致播放期间响度的烦恼波动。本发明通过检测信号中的不正确的元数据参数值并用校正的值替换不正确的值来克服这个问题。

3. 发明申请

WO0215587A3 MODULATING ONE OR MORE PARAMETERS OF AN AUDIO OR VIDEO PERCEPTUAL CODING SYSTEM IN RESPONSE TO SUPPLEMENTAL INFORMATION 审中-公开
标题翻译：调整音频或视频编码系统的一个或多个参数对补充信息的响应
公开(公告)号：WO0215587A3
公开(公告)日：2003-03-13
申请号：PCT/US0125473
申请日：2001-08-15
申请人： DOLBY LAB LICENSING CORP , WATSON MATTHEW AUBREY , TRUMAN MICHAEL MEAD , VERNON STEPHEN DECKER , CROCKETT BRETT GRAHAM
发明人： WATSON MATTHEW AUBREY , TRUMAN MICHAEL MEAD , VERNON STEPHEN DECKER , CROCKETT BRETT GRAHAM
IPC分类号： H04N5/91 , G06T1/00 , G10L19/002 , H04N19/134 , H04N7/26 , G10L19/00
CPC分类号： G06T1/0028 , G06T2201/0064 , G10L19/002 , G10L19/018 , H04N19/467
摘要： A method of modifying the operation of the encoder function (2) and/or the decoder function (4) of a perceptual coding system in accordance with supplemental information, such as a watermark, so that the supplemental information may be detectable in the output of the decoder function. One or more parameters are modulated in the encoder function and/or the decoder function in response to the supplemental information.
摘要翻译：根据诸如水印的补充信息修改感知编码系统的编码器功能（2）和/或解码器功能（4）的操作的方法，使得补充信息可以在解码功能。响应于补充信息，在编码器功能和/或解码器功能中调制一个或多个参数。

4. 发明申请

WO2008021110A2 AUDIO-PEAK LIMITING IN SLOW AND FAST STAGES 审中-公开
标题翻译：音频限制在缓慢和快速的阶段
公开(公告)号：WO2008021110A2
公开(公告)日：2008-02-21
申请号：PCT/US2007/017588
申请日：2007-08-08
申请人： DOLBY LABORATORIES LICENSING CORPORATION , SMITHERS, Michael John , CROCKETT, Brett Graham , MCGRATH, David Stanley
发明人： SMITHERS, Michael John , CROCKETT, Brett Graham , MCGRATH, David Stanley
CPC分类号： H03G7/007 , H03G11/008
摘要： A method and apparatus for limiting the absolute magnitude of an audio signal. The method may include firstly variable-gain reducing the gain of an audio signal, and then secondly variable-gain reducing the gain of the audio signal faster than the first variable-gain reduction, thereby limiting the absolute magnitude of the audio signal to a threshold. The first variable-gain reduction may include variable-gain reducing the gain of the audio signal in a first stage, and the second variable-gain reduction may include variable-gain reducing the gain of the audio signal in a second stage that reduces the gain faster than the first stage. The second variable-gain reduction may include delaying the audio signal, finding a peak among the delayed audio signal, calculating a fast gain from a found peak, and modifying the delayed audio signal with the calculated fast gain.
摘要翻译：一种用于限制音频信号的绝对幅度的方法和装置。该方法可以首先包括减小音频信号的增益的可变增益，然后可以增加第二可变增益，从而比第一可变增益减小更快地减小音频信号的增益，从而将音频信号的绝对幅度限制到阈值。第一可变增益减小可以包括在第一阶段减小音频信号的增益的可变增益，并且第二可变增益减小可以包括在减小增益的第二级中减小音频信号的增益的可变增益比第一阶段快。第二可变增益减小可以包括延迟音频信号，在延迟的音频信号中找到峰值，从找到的峰值计算快速增益，以及用所计算的快速增益修改延迟的音频信号。

5. 发明申请

WO2006113047A1 ECONOMICAL LOUDNESS MEASUREMENT OF CODED AUDIO 审中-公开
标题翻译：编码音频经济学测量
公开(公告)号：WO2006113047A1
公开(公告)日：2006-10-26
申请号：PCT/US2006/010823
申请日：2006-03-23
申请人： DOLBY LABORATORIES LICENSING CORPORATION , CROCKETT, Brett, Graham , SMITHERS, Michael, John , SEEFELDT, Alan, Jeffrey
发明人： CROCKETT, Brett, Graham , SMITHERS, Michael, John , SEEFELDT, Alan, Jeffrey
IPC分类号： H04S7/00 , G10L19/02
CPC分类号： H04S7/00 , G10L19/02 , H04S2400/13
摘要： Measuring the loudness of audio encoded in a bitstream that includes data from which an approximation of the power spectrum of the audio can be derived without fully decoding the audio is performed by deriving the approximation of the power spectrum of the audio from said bitstream without fully decoding the audio, and determining an approximate loudness of the audio in response to the approximation of the power spectrum of the audio. The data may include coarse representations of the audio and associated finer representations of the audio, the approximation of the power spectrum of the audio being derived from the coarse representations of the audio. In the case of subband encoded audio, the coarse representations of the audio may comprise scale factors and the associated finer representations of the audio may comprise sample data associated with each scale factor.
摘要翻译：测量在比特流中编码的音频的响度，其包括可以在不完全解码音频的情况下导出音频功率谱的近似的数据，通过从所述比特流导出音频的功率谱的近似而不进行完全解码音频，并且响应于音频的功率谱的近似来确定音频的近似响度。数据可以包括音频的粗略表示和音频的相关联的更细的表示，音频的功率谱的近似是从音频的粗略表示导出的。在子带编码音频的情况下，音频的粗略表示可以包括比例因子，并且音频的相关联的更细的表示可以包括与每个比例因子相关联的采样数据。

6. 发明申请

WO2004111994A2 METHOD, APPARATUS AND COMPUTER PROGRAM FOR CALCULATING AND ADJUSTING THE PERCEIVED LOUDNESS OF AN AUDIO SIGNAL 审中-公开
标题翻译：用于计算和调整音频信号感知的方法，装置和计算机程序
公开(公告)号：WO2004111994A2
公开(公告)日：2004-12-23
申请号：PCT/US2004016964
申请日：2004-05-27
申请人： DOLBY LAB LICENSING CORP , SEEFELDT ALAN JEFFREY , SMITHERS MICHAEL J , CROCKETT BRETT GRAHAM
发明人： SEEFELDT ALAN JEFFREY , SMITHERS MICHAEL J , CROCKETT BRETT GRAHAM
IPC分类号： G10L11/00 , H03G9/02 , G10L
CPC分类号： H03G9/005 , G10L25/48 , H03G5/00 , H03G5/005 , H03G9/025
摘要： One or a combination of two or more specific loudness model functions selected from a group of two or more of such functions are employed in calculating the perceptual loudness of an audio signal. The function or functions may be selected, for example, by a measure of the degree to which the audio signal is narrowband or wideband. Alternatively or with such a selection from a group of functions, a gain value G[t] is calculated, which gain, when applied to the audio signal, results in a perceived loudness substantially the same as a reference loudness. The gain calculating employs an iterative processing loop that includes the perceptual loudness calculation.
摘要翻译：在计算音频信号的感知响度时，采用从这些功能中的两个或更多个组中选出的两个或更多个特定响度模型函数中的一个或更多组合。功能或功能可以例如通过音频信号是窄带或宽带的程度的度量来选择。或者或通过一组功能的这种选择，计算增益值G [t]，当应用于音频信号时，增益值导致与基准响度基本相同的感知响度。增益计算采用包括感知响度计算的迭代处理循环。

7. 发明申请

WO2008021110A3 AUDIO-PEAK LIMITING IN SLOW AND FAST STAGES 审中-公开
标题翻译：音频峰值限制在慢速和快速阶段
公开(公告)号：WO2008021110A3
公开(公告)日：2008-06-05
申请号：PCT/US2007017588
申请日：2007-08-08
申请人： DOLBY LAB LICENSING CORP , SMITHERS MICHAEL JOHN , CROCKETT BRETT GRAHAM , MCGRATH DAVID STANLEY
发明人： SMITHERS MICHAEL JOHN , CROCKETT BRETT GRAHAM , MCGRATH DAVID STANLEY
IPC分类号： H03G7/00 , H03G11/00
CPC分类号： H03G7/007 , H03G11/008
摘要： A method and apparatus for limiting the absolute magnitude of an audio signal. The method may include firstly variable-gain reducing the gain of an audio signal, and then secondly variable-gain reducing the gain of the audio signal faster than the first variable-gain reduction, thereby limiting the absolute magnitude of the audio signal to a threshold. The first variable-gain reduction may include variable-gain reducing the gain of the audio signal in a first stage, and the second variable-gain reduction may include variable-gain reducing the gain of the audio signal in a second stage that reduces the gain faster than the first stage. The second variable-gain reduction may include delaying the audio signal, finding a peak among the delayed audio signal, calculating a fast gain from a found peak, and modifying the delayed audio signal with the calculated fast gain.
摘要翻译：一种用于限制音频信号的绝对量值的方法和设备。该方法可以首先包括可变增益降低音频信号的增益，然后可变增益比第一可变增益降低更快地降低音频信号的增益，由此将音频信号的绝对量限制为阈值。第一可变增益降低可以包括降低第一级中的音频信号的增益的可变增益，并且第二可变增益降低可以包括降低第二级中的音频信号的增益的可变增益，比第一阶段快。第二可变增益降低可以包括延迟音频信号，在延迟的音频信号中找到峰值，从找到的峰值计算快速增益，以及用计算的快速增益修改延迟的音频信号。

8. 发明申请

WO2004111994A3 METHOD, APPARATUS AND COMPUTER PROGRAM FOR CALCULATING AND ADJUSTING THE PERCEIVED LOUDNESS OF AN AUDIO SIGNAL 审中-公开
公开(公告)号：WO2004111994A3
公开(公告)日：2004-12-23
申请号：PCT/US2004/016964
申请日：2004-05-27
申请人： DOLBY LABORATORIES LICENSING CORPORATION , SEEFELDT, Alan, Jeffrey , SMITHERS, Michael, J. , CROCKETT, Brett, Graham
发明人： SEEFELDT, Alan, Jeffrey , SMITHERS, Michael, J. , CROCKETT, Brett, Graham
IPC分类号： G10L11/00
摘要： One or a combination of two or more specific loudness model functions selected from a group of two or more of such functions are employed in calculating the perceptual loudness of an audio signal. The function or functions may be selected, for example, by a measure of the degree to which the audio signal is narrowband or wideband. Alternatively or with such a selection from a group of functions, a gain value G [t] is calculated, which gain, when applied to the audio signal, results in a perceived loudness substantially the same as a reference loudness. The gain calculating employs an iterative processing loop that includes the perceptual loudness calculation.

9. 发明申请

WO2007127023A1 AUDIO GAIN CONTROL USING SPECIFIC-LOUDNESS-BASED AUDITORY EVENT DETECTION 审中-公开
标题翻译：使用特定基于LOUDNESS的审核事件检测的音频增益控制
公开(公告)号：WO2007127023A1
公开(公告)日：2007-11-08
申请号：PCT/US2007/008313
申请日：2007-03-30
申请人： DOLBY LABORATORIES LICENSING CORPORATION , CROCKETT, Brett, Graham , SEEFELDT, Alan, Jeffrey
发明人： CROCKETT, Brett, Graham , SEEFELDT, Alan, Jeffrey
IPC分类号： H03G3/30 , H03G7/00
CPC分类号： H03G3/3005 , G10L21/038 , G10L25/21 , H03G1/00 , H03G3/3089 , H03G7/007 , H03G9/005 , H04R3/04 , H04R2430/03
摘要： In one disclosed aspect, dynamic gain modification s are applied to an audio signal at least partly in response to auditory events and/or the degree of change in signal characteristics associated with said auditory event boundaries. In another aspect, an audio signal is divided into auditory events by comparing the difference in specific loudness between successive time blocks of the audio signal.
摘要翻译：在一个公开的方面中，动态增益修改至少部分地响应于听觉事件和/或与所述听觉事件边界相关联的信号特征的变化程度而应用于音频信号。在另一方面，通过比较音频信号的连续时间块之间的特定响度的差异，将音频信号分成听觉事件。

10. 发明申请

WO2006113062A1 AUDIO METADATA VERIFICATION 审中-公开
标题翻译：音频元数据验证
公开(公告)号：WO2006113062A1
公开(公告)日：2006-10-26
申请号：PCT/US2006/011202
申请日：2006-03-23
申请人： DOLBY LABORATORIES LICENSING CORPORATION , CROCKETT, Brett, Graham
发明人： CROCKETT, Brett, Graham
IPC分类号： G10L11/00 , H03G3/00 , H03G3/20 , H03G7/00 , H04R5/00
CPC分类号： G10L19/167
摘要： A digital bitstream, comprising data bits representing audio, metadata intended to be correct for the audio, and metadata verification information, wherein all or part of the metadata may not be correct for the audio. The metadata verification information is usable to detect whether or not metadata is correct for the audio and, if not correct, to change it so that it is correct. The metadata verification information usable to detect and change metadata may include a copy, or a data-compressed copy, of a correct version of the metadata.
摘要翻译：数字比特流，包括表示音频的数据位，旨在对于音频正确的元数据和元数据验证信息，其中全部或部分元数据对于音频可能不正确。元数据验证信息可用于检测元数据是否对于音频是正确的，并且如果不正确，则改变它，使得它是正确的。可用于检测和更改元数据的元数据验证信息可以包括元数据的正确版本的副本或数据压缩副本。

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