专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2014072260A2 REDUCED COMPLEXITY CONVERTER SNR CALCULATION 审中-公开
标题翻译：降低复杂度转换器SNR计算
公开(公告)号：WO2014072260A2
公开(公告)日：2014-05-15
申请号：PCT/EP2013/072961
申请日：2013-11-04
申请人： DOLBY INTERNATIONAL AB , DOLBY LABORATORIES LICENSING CORPORATION
发明人： SCHUG, Michael , WILLIAMS, Phillip
IPC分类号： G10L19/03
CPC分类号： G10L19/008 , G10L19/02 , G10L19/032 , G10L19/173
摘要： 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.
摘要翻译：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），该浮点编码单元（304）被配置为基于该组频谱系数（312）确定一组缩放因子和一组缩放值（314）。并对该组比例因子进行编码以产生一组编码比例因子（313）。另外，编码器（300）包括比特分配和量化单元（305,306），该比特分配和量化单元被配置为基于第一目标数据速率来确定用于量化该组缩放值（314）的可用比特的总数用于该组编码比例因子的比特数（313）; 确定指示可用比特总数的分配的第一控制参数（315），用于量化该组缩放值（314）的缩放值; 并且根据第一控制参数（315）量化该组缩放值（314）以产生一组量化缩放值（317）。此外，编码器（300）包括被配置为基于第一控制参数（315）确定第二控制参数（321）的转码模拟单元（320）; 其中所述第二控制参数（321）使代码转换器能够以第二目标数据速率将所述第一比特流转换为第二比特流; 其中所述第二比特流符合不同于所述第一音频编解码器系统的第二音频编解码器系统; 并且其中第一比特流包括第二控制参数。

2. 发明申请

WO2013106098A1 METHOD AND SYSTEM FOR ENCODING AUDIO DATA WITH ADAPTIVE LOW FREQUENCY COMPENSATION 审中-公开
标题翻译：用自适应低频补偿编码音频数据的方法和系统
公开(公告)号：WO2013106098A1
公开(公告)日：2013-07-18
申请号：PCT/US2012/057132
申请日：2012-09-25
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： BISWAS, Arijit , MELKOTE, Vinay , SCHUG, Michael , DAVIDSON, Grant A. , VINTON, Mark S.
IPC分类号： G10L19/032 , G10L19/02
CPC分类号： G10L19/028 , G10L19/0204 , G10L19/032 , G10L19/265
摘要： A method for determining mantissa bit allocation of audio data values of frequency domain audio data to be encoded. The allocation method includes a step of determining masking values for the audio data values, including by performing adaptive low frequency compensation on the audio data of each frequency band of a set of low frequency bands of the audio data. The adaptive low frequency compensation includes steps of: performing tonality detection on the audio data to generate compensation control data indicative of whether each frequency band in the set of low frequency bands has prominent tonal content; and performing low frequency compensation on the audio data in each frequency band in the set of low frequency bands having prominent tonal content as indicated by the compensation control data, but not performing low frequency compensation on the audio data in any other frequency band in the set of low frequency bands.
摘要翻译：一种用于确定要编码的频域音频数据的音频数据值的尾数位分配的方法。分配方法包括通过对音频数据的一组低频带的每个频带的音频数据执行自适应低频补偿来确定音频数据值的屏蔽值的步骤。所述自适应低频补偿包括以下步骤：对所述音频数据执行音调检测，以产生指示所述一组低频带中的每个频带是否具有突出的音调内容的补偿控制数据; 对由该补偿控制数据所表示的具有突出色调内容的低频带组中的每个频带中的音频数据执行低频补偿，而不对该组中的任何其它频带中的音频数据执行低频补偿的低频带。

3. 发明申请

WO2011110525A1 SYSTEM FOR COMBINING LOUDNESS MEASUREMENTS IN A SINGLE PLAYBACK MODE 审中-公开
标题翻译：用于在单回放模式下组合舒适度测量的系统
公开(公告)号：WO2011110525A1
公开(公告)日：2011-09-15
申请号：PCT/EP2011/053389
申请日：2011-03-07
申请人： DOLBY INTERNATIONAL AB , DOLBY LABORATORIES LICENSING CORPORATION , WOLTERS, Martin , SCHUG, Michael , MUNDT, Harald, H. , RIEDMILLER, Jeffrey, C.
发明人： WOLTERS, Martin , SCHUG, Michael , MUNDT, Harald, H. , RIEDMILLER, Jeffrey, C.
IPC分类号： H03G9/00 , H03G9/14
CPC分类号： H03G9/00 , H03G9/005 , H03G9/14
摘要： The present document relates to processing of multimedia data, notably the encoding, the transmission, the decoding and the rendering of multimedia data, e.g. audio files or bitstreams. In particular, the present document relates to the implementation of loudness control in multimedia players. A method for providing loudness related data to a media player is described. The method comprises the steps of providing a first loudness related value associated with an audio signal; wherein the first loudness related value has been determined according to a first procedure; of converting the first loudness related value into a second loudness related value using a reversible relation; wherein the second loudness related value is associated with a second procedure for determining loudness related values; of storing the second loudness related value in metadata associated with the audio signal; and of providing the metadata to the media player.
摘要翻译：本文件涉及多媒体数据的处理，特别是多媒体数据的编码，传输，解码和呈现，例如，音频文件或比特流。特别地，本文件涉及多媒体播放器中的响度控制的实现。描述了一种用于向媒体播放器提供响度相关数据的方法。该方法包括以下步骤：提供与音频信号相关联的第一响度相关值; 其中所述第一响度相关值已经根据第一过程确定; 使用可逆关系将第一响度相关值转换为第二响度相关值; 其中所述第二响度相关值与用于确定响度相关值的第二过程相关联; 将第二响度相关值存储在与音频信号相关联的元数据中; 并向媒体播放器提供元数据。

4. 发明申请

WO2011100155A1 SYSTEM AND METHOD FOR NON-DESTRUCTIVELY NORMALIZING LOUDNESS OF AUDIO SIGNALS WITHIN PORTABLE DEVICES 审中-公开
标题翻译：音频信号在便携式设备中的非正规化标准化的系统和方法
公开(公告)号：WO2011100155A1
公开(公告)日：2011-08-18
申请号：PCT/US2011/023531
申请日：2011-02-03
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB , RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
发明人： RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
IPC分类号： G10L19/14 , H03G7/00
CPC分类号： G10L19/22 , G10L19/02 , G10L19/0208 , G10L19/167 , G10L19/26 , H03G3/3089 , H03G3/32 , H03G7/007
摘要： Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.
摘要翻译：许多便携式播放设备不能解码和播放具有宽带宽和宽动态范围的编码音频内容，具有一致的响度和清晰度，除非编码音频内容已经为这些设备专门准备。通过使用编码的内容包含一些通过相对于另一已知压缩简档的绝对值或差分值来指定合适的动态范围压缩简档的元数据来克服该问题。播放装置还可以自适应地对播放音频应用增益和限制。公开了在编码器，代码转换器和解码器中的实现。

5. 发明申请

WO2014179119A1 HYBRID ENCODING OF MULTICHANNEL AUDIO 审中-公开
标题翻译：多通道音频混合编码
公开(公告)号：WO2014179119A1
公开(公告)日：2014-11-06
申请号：PCT/US2014/034981
申请日：2014-04-22
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： WILLIAMS, Phillip , SCHUG, Michael , THESING, Robin
IPC分类号： G10L19/00 , H04S3/00
CPC分类号： G10L19/008 , G10L19/02
摘要： A method for encoding a multichannel audio input signal, including steps of generating a downmix of low frequency components of a subset of channels of the input signal, waveform coding each channel of the downmix, thereby generating waveform coded, downmixed data, performing parametric encoding on at least some higher frequency components of each channel of the input signal, thereby generating parametrically coded data, and generating an encoded audio signal (e.g., an E-AC-3 encoded signal) indicative of the waveform coded, downmixed data and the parametrically coded data. Other aspects are methods for decoding such an encoded signal, and systems configured to perform any embodiment of the inventive method.
摘要翻译：一种用于编码多声道音频输入信号的方法，包括以下步骤：产生输入信号的通道子集的低频分量的下混合，对下混频的每个通道进行波形编码，由此产生波形编码的下混合数据，执行参数编码输入信号的每个通道的至少一些较高频率分量，由此产生参数编码数据，并产生指示波形编码的下混合数据和参数编码的编码音频信号（例如，E-AC-3编码信号）数据。其他方面是用于对这样的编码信号进行解码的方法以及被配置为执行本发明方法的任何实施例的系统。

6. 发明申请

WO2014165543A1 COMPANDING APPARATUS AND METHOD TO REDUCE QUANTIZATION NOISE USING ADVANCED SPECTRAL EXTENSION 审中-公开
标题翻译：使用高级光谱扩展降低量化噪声的装置和方法
公开(公告)号：WO2014165543A1
公开(公告)日：2014-10-09
申请号：PCT/US2014/032578
申请日：2014-04-01
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： HEDELIN, Per , BISWAS, Arijit , SCHUG, Michael , MELKOTE, Vinay
IPC分类号： G10L21/034 , H03G3/24 , G03G7/00 , H04B1/64
CPC分类号： G10L21/0232 , G10L19/008 , G10L19/0208 , G10L19/032 , G10L21/034 , G10L25/18 , G10L25/45 , H03G7/007 , H04B1/66
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.
摘要翻译：实施例涉及用于减少音频编解码器中的编码噪声的压扩方法和系统。压缩处理通过压缩处理来降低初始音频信号的原始动态范围，该压缩处理使用定义的窗口形状将初始音频信号分成多个段，使用基于非能量的平均值来计算频域中的宽带增益初始音频信号的频域样本，并且应用各个增益值来放大相对较低强度的片段并衰减相对较高强度的片段。压缩的音频信号然后被扩展回到基本上原始的动态范围，该动态范围应用反向增益值来放大相对较高强度的片段，并且衰减相对较低强度的段。使用QMF滤波器组来分析初始音频信号以获得频域表示。

7. 发明申请

WO2012138819A2 AUDIO ENCODING METHOD AND SYSTEM FOR GENERATING A UNIFIED BITSTREAM DECODABLE BY DECODERS IMPLEMENTING DIFFERENT DECODING PROTOCOLS 审中-公开
标题翻译：音视频编码方法和系统，用于生成由解码器实现的不同解码协议解码的统一的双绞线
公开(公告)号：WO2012138819A2
公开(公告)日：2012-10-11
申请号：PCT/US2012/032252
申请日：2012-04-05
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB , RIEDMILLER, Jeffrey, C. , FARAHANI, Farhad , SCHUG, Michael , RADHAKRISHNAN, Regunathan , VINTON, Mark, S.
发明人： RIEDMILLER, Jeffrey, C. , FARAHANI, Farhad , SCHUG, Michael , RADHAKRISHNAN, Regunathan , VINTON, Mark, S.
IPC分类号： G10L19/14
CPC分类号： G10L19/002 , G10L19/167
摘要： In a class of embodiments, an audio encoding system (typically, a perceptual encoding system that is configured to generate a single ("unified") bitstream that is compatible with (i.e., decodable by) a first decoder configured to decode audio data encoded in accordance with a first encoding protocol (e.g., the multichannel Dolby Digital Plus, or DD+, protocol) and a second decoder configured to decode audio data encoded in accordance with a second encoding protocol (e.g., the stereo AAC, HE AAC v1, or HE AAC v2 protocol). The unified bitstream can include both encoded data (e.g., bursts of data) decodable by the first decoder (and ignored by the second decoder) and encoded data (e.g., other bursts of data) decodable by the second decoder (and ignored by the first decoder). In effect, the second encoding format is hidden within the unified bitstream when the bitstream is decoded by the first decoder, and the first encoding format is hidden within the unified bitstream when the bitstream is decoded by the second decoder. The format of the unified bitstream generated in accordance with the invention may eliminate the need for transcoding elements throughout an entire media chain and/or ecosystem. Other aspects of the invention are an encoding method performed by any embodiment of the inventive encoder, a decoding method performed by any embodiment of the inventive decoder, and a computer readable medium (e.g., disc) which stores code for implementing any embodiment of the inventive method.
摘要翻译：在一类实施例中，音频编码系统（通常是感知编码系统，其被配置为生成与第一解码器兼容的（即可解码的）单个（“统一”）比特流，第一解码器被配置为对根据第一编码协议（例如，多频道杜比数字+或DD +协议）和被配置为对根据第二编码协议（例如立体声AAC，HE AAC v1或HE）编码的音频数据进行解码的第二解码器统一比特流可以包括可由第一解码器解码（并由第二解码器忽略）的可编码数据（例如，数据突发）和由第二解码器解码的编码数据（例如，其他数据突发）并且由第一解码器忽略）实际上，当比特流被第一解码器解码时，第二编码格式被隐藏在统一比特流内，并且当比特流中的比特流被隐藏时，第一编码格式被隐藏在统一比特流内由第二解码器解码。根据本发明生成的统一比特流的格式可以消除在整个媒体链和/或生态系统中对代码转换元素的需要。本发明的其他方面是由本发明编码器的任何实施例执行的编码方法，由本发明解码器的任何实施例执行的解码方法，以及存储用于实现本发明的任何实施例的代码的计算机可读介质（例如，盘）方法。

8. 发明授权

EP2534656B1 SYSTEM AND METHOD FOR NON-DESTRUCTIVELY NORMALIZING LOUDNESS OF AUDIO SIGNALS WITHIN PORTABLE DEVICES 有权转让
公开(公告)号：EP2534656B1
公开(公告)日：2018-09-05
申请号：EP11706975.7
申请日：2011-02-03
申请人： Dolby Laboratories Licensing Corporation , Dolby International AB
发明人： RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
IPC分类号： G10L19/16 , G10L19/02 , H03G7/00
CPC分类号： G10L19/22 , G10L19/02 , G10L19/0208 , G10L19/167 , G10L19/26 , H03G3/3089 , H03G3/32 , H03G7/007
摘要： Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.

9. 发明公开

EP2534656A1 SYSTEM AND METHOD FOR NON-DESTRUCTIVELY NORMALIZING LOUDNESS OF AUDIO SIGNALS WITHIN PORTABLE DEVICES 有权转让
标题翻译：系统和方法无损正常化音频信号的便携式装置中的音量
公开(公告)号：EP2534656A1
公开(公告)日：2012-12-19
申请号：EP11706975.7
申请日：2011-02-03
申请人： Dolby Laboratories Licensing Corporation , Dolby International AB
发明人： RIEDMILLER, Jeffrey C. , MUNDT, Harald H. , SCHUG, Michael , WOLTERS, Martin
IPC分类号： G10L19/14 , H03G7/00
CPC分类号： G10L19/22 , G10L19/02 , G10L19/0208 , G10L19/167 , G10L19/26 , H03G3/3089 , H03G3/32 , H03G7/007
摘要： Many portable playback devices cannot decode and playback encoded audio content having wide bandwidth and wide dynamic range with consistent loudness and intelligibility unless the encoded audio content has been prepared specially for these devices. This problem can be overcome by including with the encoded content some metadata that specifies a suitable dynamic range compression profile by either absolute values or differential values relative to another known compression profile. A playback device may also adaptively apply gain and limiting to the playback audio. Implementations in encoders, in transcoders and in decoders are disclosed.

10. 发明授权

EP2992528B1 HYBRID ENCODING OF MULTICHANNEL AUDIO 有权转让
公开(公告)号：EP2992528B1
公开(公告)日：2019-06-12
申请号：EP14791004.6
申请日：2014-04-22
申请人： Dolby Laboratories Licensing Corporation , Dolby International AB
发明人： WILLIAMS, Phillip , SCHUG, Michael , THESING, Robin
IPC分类号： G10L19/00 , H04S3/00

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式