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公开(公告)号：US09883309B2
公开(公告)日：2018-01-30
申请号：US15511146
申请日：2015-09-23
Inventor： Leif J. Samuelsson , Phillip Williams , Christian Schindler , Wolfgang A. Schildbach
CPC classification number: H04S3/008 , G10L19/008 , G10L19/167 , G10L21/00 , H04S2400/01 , H04S2400/03 , H04S2400/11 , H04S2420/03
Abstract: A method for inserting a first audio signal into a bitstream which comprises a downmix signal and associated bitstream metadata is described. The downmix signal and associated bitstream metadata are indicative of an audio program comprising a plurality of spatially diverse audio signals. The downmix signal comprises at least one audio channel and the bitstream metadata comprise upmix metadata for reproducing the plurality of spatially diverse audio signals from the at least one channel. The method comprises mixing the first audio signal with the at least one audio channel to generate a modified downmix signal. The method further comprises generating an output bitstream comprising the modified downmix signal and the associated modified bitstream metadata indicative of a modified audio program comprising a plurality of modified spatially diverse audio signals.
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公开(公告)号：US09208789B2
公开(公告)日：2015-12-08
申请号：US14184961
申请日：2014-02-20
Inventor： Michael Schug , Phillip Williams , Luca Baradel
IPC: G10L19/02 , G10L19/008 , G10L19/032 , G10L19/16
CPC classification number: G10L19/008 , G10L19/02 , G10L19/032 , G10L19/173
Abstract: An audio encoder configured to encode an audio signal to generate a bitstream having E-AC-3 format, including by determining a first control parameter indicative of an allocation of available mantissa bits for quantized audio content of the signal. The encoder is configured to perform transcoding simulation to determine a second control parameter in a manner based at least in part on statistical analysis of results of E-AC-3 bit allocation processing of audio data assuming a first target data rate, and of AC-3 bit allocation processing of the data assuming a second target data rate, and to include the second control parameter in the bitstream for use by a converter to convert the bitstream into a second bitstream having AC-3 format at the second target data rate. Other aspects are converters configured to perform transcoding on a bitstream using such a second control parameter, and methods performed by any embodiment of the inventive encoder or converter.
Abstract translation: 音频编码器被配置为对音频信号进行编码以生成具有E-AC-3格式的比特流，包括通过确定指示信号的量化音频内容的可用尾数位的分配的第一控制参数。 编码器被配置为执行代码转换模拟，以至少部分地基于假定第一目标数据速率的音频数据的E-AC-3位分配处理的结果的统计分析和AC- 假设第二目标数据速率的数据的3比特分配处理，并且将第二控制参数包括在比特流中以供转换器使用以将比特流转换为具有第二目标数据速率的具有AC-3格式的第二比特流。 其他方面是被配置为使用这样的第二控制参数在比特流上执行代码转换的转换器，以及由本发明的编码器或转换器的任何实施例执行的方法。
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公开(公告)号：US20150269950A1
公开(公告)日：2015-09-24
申请号：US14439795
申请日：2013-11-11
Inventor： Michael Schug , Phillip Williams
IPC: G10L19/008 , G10L19/032 , G10L19/16 , G10L19/02
CPC classification number: G10L19/008 , G10L19/02 , G10L19/032 , G10L19/173
Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for reducing the complexity of a bit allocation process used in the context of audio encoding/decoding. An audio encoder (300) configured to encode an audio signal according to a first audio codec system is described. The audio encoder (300) comprises a transform unit (302) configured to determine a set of spectral coefficients (312) based on the audio signal. Furthermore, the encoder (300) comprises a floating-point encoding unit (304) configured to determine a set of scale factors and a set of scaled values (314), based on the set of spectral coefficients (312); and to encode the set of scale factors to yield a set of encoded scale factors (313). In addition, the encoder (300) comprises a bit allocation and quantization unit (305, 306) configured to determine a total number of available bits for quantizing the set of scaled values (314), based on a first target data-rate and based on the number of bits used for the set of encoded scale factors (313); to determine a first control parameter (315) indicative of an allocation of the total number of available bits for quantizing the scaled values of the set of scaled values (314); and to quantize the set of scaled values (314) in accordance to the first control parameter (315) to yield a set of quantized scaled values (317). Furthermore, the encoder (300) comprises a transcoding simulation unit (320) configured to determine a second control parameter (321) based on the first control parameter (315); wherein the second control parameter (321) enables a transcoder to convert the first bitstream into a second bitstream at a second target data-rate; wherein the second bitstream accords to a second audio codec system different from the first audio codec system; and wherein the first bitstream comprises the second control parameter.
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Patent Agency Ranking
公开(公告)号：US20140188488A1
公开(公告)日：2014-07-03
申请号：US14184961
申请日：2014-02-20
Inventor： Michael Schug , Phillip Williams , Luca Baradel
IPC: G10L19/008
CPC classification number: G10L19/008 , G10L19/02 , G10L19/032 , G10L19/173
Abstract: An audio encoder configured to encode an audio signal to generate a bitstream having E-AC-3 format, including by determining a first control parameter indicative of an allocation of available mantissa bits for quantized audio content of the signal. The encoder is configured to perform transcoding simulation to determine a second control parameter in a manner based at least in part on statistical analysis of results of E-AC-3 bit allocation processing of audio data assuming a first target data rate, and of AC-3 bit allocation processing of the data assuming a second target data rate, and to include the second control parameter in the bitstream for use by a converter to convert the bitstream into a second to bitstream having AC-3 format at the second target data rate. Other aspects are converters configured to perform transcoding on a bitstream using such a second control parameter, and methods performed by any embodiment of the inventive encoder or converter.
Abstract translation: 音频编码器被配置为对音频信号进行编码以生成具有E-AC-3格式的比特流，包括通过确定指示信号的量化音频内容的可用尾数位的分配的第一控制参数。 编码器被配置为执行代码转换模拟，以至少部分地基于假定第一目标数据速率的音频数据的E-AC-3位分配处理的结果的统计分析和AC- 假设第二目标数据速率的数据的3比特分配处理，并且将第二控制参数包括在比特流中以供转换器使用以将比特流转换为具有第二目标数据速率的具有AC-3格式的第二比特流。 其他方面是被配置为使用这样的第二控制参数在比特流上执行代码转换的转换器，以及由本发明的编码器或转换器的任何实施例执行的方法。
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公开(公告)号：US11509987B2
公开(公告)日：2022-11-22
申请号：US17273915
申请日：2019-09-09
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Glenn N. Dickins , Joshua Brandon Lando , Andy Jaspar , C. Phillip Brown , Phillip Williams
Abstract: An audio processing method may involve receiving media input audio data corresponding to a media stream and headphone microphone input audio data, determining a media audio gain for at least one of a plurality of frequency bands of the media input audio data and determining a headphone microphone audio gain for at least one of a plurality of frequency bands of the headphone microphone input audio data. Determining the headphone microphone audio gain may involve determining a feedback risk control value, for at least one of the plurality of frequency bands, corresponding to a risk of headphone feedback between at least one external microphone of a headphone microphone system and at least one headphone speaker and determining a headphone microphone audio gain that will mitigate actual or potential headphone feedback in at least one of the plurality of frequency bands, based at least partly upon the feedback risk control value.
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公开(公告)号：US09779738B2
公开(公告)日：2017-10-03
申请号：US14398967
申请日：2013-05-14
Inventor： Harald Mundt , Jeffrey Riedmiller , Karl J. Roeden , Michael Ward , Phillip Williams
IPC: H04R5/00 , G10L19/008 , H04S3/00 , G10L19/032 , G10L19/24
CPC classification number: G10L19/008 , G10L19/032 , G10L19/24 , H04S3/008
Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for improving the quality of encoded multi-channel audio signals. An audio encoder configured to encode a multi-channel audio signal according to a total available data-rate is described. The multi-channel audio signal is representable as a basic group (121) of channels for rendering the multi-channel audio signal in accordance to a basic channel configuration, and as an extension group (122) of channels, which—in combination with the basic group (122)—is for rendering the multi-channel audio signal in accordance to an extended channel configuration. The basic channel configuration and the extended channel configuration are different from one another.
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公开(公告)号：US09378748B2
公开(公告)日：2016-06-28
申请号：US14439795
申请日：2013-11-04
Inventor： Michael Schug , Phillip Williams
IPC: G10L19/00 , G10L19/008 , G10L19/02 , G10L19/032 , G10L19/16
CPC classification number: G10L19/008 , G10L19/02 , G10L19/032 , G10L19/173
Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for reducing the complexity of a bit allocation process used in the context of audio encoding/decoding. An audio encoder (300) configured to encode an audio signal according to a first audio codec system is described. The audio encoder (300) comprises a transform unit (302) configured to determine a set of spectral coefficients (312) based on the audio signal. Furthermore, the encoder (300) comprises a floating-point encoding unit (304) configured to determine a set of scale factors and a set of scaled values (314), based on the set of spectral coefficients (312); and to encode the set of scale factors to yield a set of encoded scale factors (313).
Abstract translation: 本文件涉及音频编码/解码。 特别地，本文件涉及用于降低在音频编码/解码的上下文中使用的比特分配处理的复杂度的方法和系统。 描述了被配置为根据第一音频编解码器系统对音频信号进行编码的音频编码器（300）。 音频编码器（300）包括被配置为基于音频信号确定一组频谱系数（312）的变换单元（302）。 此外，编码器（300）包括浮点编码单元（304），其被配置为基于频谱系数集合（312）确定一组缩放因子和一组缩放值（314）; 并编码一组比例因子以产生一组编码比例因子（313）。
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8.发明申请Efficient Encoding and Decoding of Multi-Channel Audio Signal with Multiple Substreams 有权具有多个子流的多声道音频信号的高效编码和解码公开(公告)号：US20150131800A1
公开(公告)日：2015-05-14
申请号：US14398967
申请日：2013-05-14
Inventor： Harald Mundt , Jeffrey Riedmiller , Karl J. Roeden , Michael Ward , Phillip Williams
IPC: G10L19/008
CPC classification number: G10L19/008 , G10L19/032 , G10L19/24 , H04S3/008
Abstract: The present document relates to audio encoding/decoding. In particular, the present document relates to a method and system for improving the quality of encoded multi-channel audio signals. An audio encoder configured to encode a multi-channel audio signal according to a total available data-rate is described. The multi-channel audio signal is representable as a basic group (121) of channels for rendering the multi-channel audio signal in accordance to a basic channel configuration, and as an extension group (122) of channels, which—in combination with the basic group (122)—is for rendering the multi-channel audio signal in accordance to an extended channel configuration. The basic channel configuration and the extended channel configuration are different from one another.
Abstract translation: 本文件涉及音频编码/解码。 特别地，本文件涉及用于提高编码的多声道音频信号的质量的方法和系统。 描述了被配置为根据总可用数据速率对多声道音频信号进行编码的音频编码器。 多声道音频信号可以表示为用于根据基本信道配置呈现多声道音频信号的信道的基本组（121），以及作为信道的扩展组（122），其与 基本组（122） - 用于根据扩展通道配置呈现多声道音频信号。 基本通道配置和扩展通道配置是不同的。
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