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1. 发明申请

WO2021239562A1 IMPROVED MAIN-ASSOCIATED AUDIO EXPERIENCE WITH EFFICIENT DUCKING GAIN APPLICATION 审中-公开
公开(公告)号：WO2021239562A1
公开(公告)日：2021-12-02
申请号：PCT/EP2021/063427
申请日：2021-05-20
申请人： DOLBY INTERNATIONAL AB
发明人： POPP, Jens , SPENGER, Claus-Christian , MERPILLAT, Celine , MUELLER, Tobias , HOERICH, Holger
IPC分类号： G10L19/008 , H04S3/00
摘要： An audio bitstream is decoded into audio objects and audio metadata for the audio objects. The audio objects include a specific audio object. The audio metadata specifies frame-level gains that include a first gain and a second gain respectively for a first audio frame and a second audio frame. It is determined, based on the first and second gains, whether sub-frame gains are to be generated for the specific audio object. If so, a ramp length is determined for a ramp used to generate the sub-frame gains for the specific audio object. The ramp of the ramp length is used to generate the sub-frame gains for the specific audio object. A sound field represented by the audio objects with the sub-frame gains is rendered by audio speakers.

2. 发明申请

WO2015082298A1 METHOD FOR BITRATE SIGNALING AND BITSTREAM FORMAT ENABLING SUCH METHOD 审中-公开
标题翻译：用于双向信号和比特格式的方法启用此方法
公开(公告)号：WO2015082298A1
公开(公告)日：2015-06-11
申请号：PCT/EP2014/075799
申请日：2014-11-27
申请人： DOLBY INTERNATIONAL AB
发明人： HOERICH, Holger , GROESCHEL, Alexander , POPP, Jens , ROESSLER, Marc , SCHMIDT, Malte
IPC分类号： G10L19/00 , G11B20/10
CPC分类号： G10L25/03 , G10L19/00 , G10L19/167 , G11B2020/00036 , G11B2020/10703 , H04N21/23406 , H04N21/2402
摘要： The present document relates to the determination of a bitrate related to an encoded bitstream, and describes a method for determining an estimate of a bitrate of a bitstream comprising a sequence of frames comprising a varying number of bitsand corresponding to excerpts of an audio and/or video signal. At least two frames of the sequence of frames comprise a parameter indicative of a processing delay for the corresponding frame. The method comprises determining: a total number of bits for a subsequence of frames from the bitstream; a corrected number of frames based on a number of frames comprised within the subsequence and the parameters of at least two frames of the subsequence; and a lower bitrate bound and an upper bitrate bound of the bitrate based on the total number of bits, the corrected number of frames and a frame rate of the bitstream.
摘要翻译：本文件涉及确定与编码比特流有关的比特率，并且描述了一种用于确定比特流的比特率的估计的方法，该比特流的比特率包括不同数量的比特并且对应于音频和/或视频信号。帧序列中的至少两帧包括指示相应帧的处理延迟的参数。该方法包括确定：来自比特流的帧的子序列的总比特数; 基于所述子序列中包含的帧数和所述子序列的至少两帧的参数的校正数目的帧; 以及基于总比特数，校正的帧数和比特流的帧速率的比特率的低比特率边界和高比特率边界。

3. 发明申请

WO2015150480A1 EXPLOITING METADATA REDUNDANCY IN IMMERSIVE AUDIO METADATA 审中-公开
标题翻译：在无与伦比的音频元数据中实现元数据冗余
公开(公告)号：WO2015150480A1
公开(公告)日：2015-10-08
申请号：PCT/EP2015/057231
申请日：2015-04-01
申请人： DOLBY INTERNATIONAL AB
发明人： FERSCH, Christof , PURNHAGEN, Heiko , POPP, Jens , WOLTERS, Martin
IPC分类号： G10L19/008
CPC分类号： H04S7/30 , G10L19/008 , H04S3/008 , H04S2400/03 , H04S2400/11 , H04S2400/13
摘要： The present document relates to the field of encoding and decoding of audio. In particular, the present document relates to encoding and decoding of an audio scene comprising audio objects. A method (400) for encoding metadata relating to a plurality of audio objects (106a) of an audio scene (102) is described. The metadata comprises a first set (114, 314) of metadata and a second set (104) of metadata. The first and second sets (104, 114, 314) of metadata comprise one or more data elements which are indicative of a property of an audio object (106a) from the plurality of audio objects (106a) and/or of a downmix signal (112) derived from the plurality of audio objects (106a). The method (400) comprises identifying (401) a redundant data element which is common to the first and second sets (104, 114, 314) of metadata. Furthermore, the method comprises encoding (402) the redundant data element of the first set (114, 314) of metadata by referring to a redundant data element of a set (104) of metadata external for the first set (114, 314) of metadata.
摘要翻译：本文件涉及音频的编码和解码领域。特别地，本文件涉及包括音频对象的音频场景的编码和解码。描述了用于编码与音频场景（102）的多个音频对象（106a）有关的元数据的方法（400）。元数据包括元数据的第一集合（114,314）和元数据的第二集合（104）。元数据的第一和第二组（104,114,314）包括指示来自多个音频对象（106a）和/或降混信号（106a）的音频对象（106a）的属性的一个或多个数据元素 112）从多个音频对象（106a）导出。方法（400）包括识别（401）元数据的第一和第二组（104,114,314）共有的冗余数据元素。此外，该方法包括通过参考第一组（114,314）的外部元数据（104）的冗余数据元素（104）来编码（402）元数据的第一组（114,314）的冗余数据元素元数据。

4. 发明申请

WO2015036348A1 TIME- ALIGNMENT OF QMF BASED PROCESSING DATA 审中-公开
标题翻译：基于QMF的处理数据的时间对齐
公开(公告)号：WO2015036348A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069039
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , PURNHAGEN, Heiko , POPP, Jens
IPC分类号： G10L21/0388
CPC分类号： G10L19/167 , G10L19/018 , G10L19/0204 , G10L19/032 , G10L21/0388
摘要： The present document relates to time-alignment of encoded data of an audio encoder with associated metadata, such as spectral band replication (SBR) metadata. An audio decoder (100, 300) configured to determine a reconstructed frame of an audio signal (237) from an access unit (110) of a received data stream is described. The access unit (110) comprises waveform data (111) and metadata (112), wherein the waveform data (111) and the metadata (112) are associated with the same reconstructed frame of the audio signal (127). The audio decoder (100, 300) comprises a waveform processing path (101, 102, 103, 104, 105) configured to generate a plurality of waveform subband signals (123) from the waveform data (111), and a metadata processing path (108, 109) configured to generate decoded metadata (128) from the metadata (111).
摘要翻译：本文件涉及具有诸如频谱带复制（SBR）元数据的相关元数据的音频编码器的编码数据的时间对准。被配置为从接收数据流的访问单元（110）确定音频信号（237）的重建帧的音频解码器（100,300）。访问单元（110）包括波形数据（111）和元数据（112），其中波形数据（111）和元数据（112）与音频信号（127）的相同的重构帧相关联。音频解码器（100,300）包括被配置为从波形数据（111）生成多个波形子带信号（123）的波形处理路径（101,102,103,104,105）和元数据处理路径，其被配置为从所述元数据（111）生成解码的元数据（128）。

5. 发明申请

WO2014161990A1 AUDIO ENCODER AND DECODER 审中-公开
标题翻译：音频编码器和解码器
公开(公告)号：WO2014161990A1
公开(公告)日：2014-10-09
申请号：PCT/EP2014/056848
申请日：2014-04-04
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , KJOERLING, Kristofer , GROESCHEL, Alexander , POPP, Jens , ROEDEN, Karl Jonas
IPC分类号： G10L19/16 , H04N21/439 , H04N21/2368 , G10L21/055
CPC分类号： G10L21/055 , G10L19/022 , G10L19/167 , G10L19/22 , H04N21/2368 , H04N21/4302 , H04N21/4398
摘要： An audio processing system (100) accepts an audio bitstream having one of a plurality of predefined audio frame rates. The system comprises a front-end component (110), which receives a variable number of quantized spectral components, corresponding to one audio frame in any of the predefined audio frame rates, and performs an inverse quantization according to predetermined, frequency-dependent quantization levels. The front-end component may be agnostic of the audio frame rate. The audio processing system further comprises a frequency-domain processing stage (120) and a sample rate converter (130), which provide a reconstructed audio signal sampled at a target sampling frequency independent of the audio frame rate. By its frame-rate adaptability, the system can be configured to operate frame-synchronously in parallel with a video processing system that accepts plural video frame rates.
摘要翻译：音频处理系统（100）接受具有多个预定音频帧速率之一的音频比特流。该系统包括前端组件（110），其接收对应于任何预定音频帧速率中的一个音频帧的可变数量的量化频谱分量，并且根据预定的频率相关量化级别执行逆量化。前端组件可能与音频帧速率无关。音频处理系统还包括频域处理级（120）和采样率转换器（130），其提供以与音频帧速率无关的目标采样频率采样的重构音频信号。通过其帧率适应性，该系统可以被配置为与接受多个视频帧速率的视频处理系统并行地同步操作。

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