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公开(公告)号：US20220295207A1
公开(公告)日：2022-09-15
申请号：US17625720
申请日：2020-07-07
发明人： Dirk Jeroen BREEBAART , David Matthew COOPER , Giulio CENGARLE , Brett G. CROCKETT , Rhonda J. WILSON
摘要： A method for generating mastered audio content, the method comprising obtaining an input audio content comprising a number, M1, of audio signals, obtaining rendered presentation of the input audio content, the rendered presentation comprising a number, M2, of audio signals, obtaining a mastered presentation generated by mastering the rendered presentation, comparing the mastered presentation with the rendered presentation to determine one or more indications of differences between the mastered presentation and the rendered presentation, modifying one or more of the audio signals of the input audio content based on the indications of differences to generate the mastered audio content. With this approach, conventional, typically stereo, channel-based mastering tools can be used to provide a mastered version of any input audio content, including object-based immersive audio content.
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公开(公告)号：US20220293113A1
公开(公告)日：2022-09-15
申请号：US17829733
申请日：2022-06-01
发明人： Lars Villemoes
IPC分类号： G10L19/02 , G10L21/038 , G10L21/04 , H03G3/00 , H03G3/30 , G10L19/025 , G10L19/26
摘要： The invention provides an efficient implementation of cross-product enhanced high-frequency reconstruction (HFR), wherein a new component at frequency QΩ+rΩ0 is generated on the basis of existing components at Ω and Ω+Ω0. The invention provides a block-based harmonic transposition, wherein a time block of complex subband samples is processed with a common phase modification. Superposition of several modified samples has the net effect of limiting undesirable intermodulation products, thereby enabling a coarser frequency resolution and/or lower degree of oversampling to be used. In one embodiment, the invention further includes a window function suitable for use with block-based cross-product enhanced HFR. A hardware embodiment of the invention may include an analysis filter bank, a subband processing unit configurable by control data and a synthesis filter bank.
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公开(公告)号：US20220277755A1
公开(公告)日：2022-09-01
申请号：US17635183
申请日：2020-08-13
IPC分类号： G10L19/083 , G10L19/16
摘要： Described herein is a method for generating a modified bitstream on a source device, wherein the method includes the steps of: a) receiving, by a receiver, a bitstream including coded media data; b) generating, by an embedder, payload of additional media data and embedding the payload in the bitstream for obtaining, as an output from the embedder, a modified bitstream including the coded media data and the payload of the additional media data; and c) outputting the modified bitstream to a sink device. Described is further a method for processing said modified bitstream on a sink device. Described are moreover a respective source device and sink device as well as a system of a source device and a sink device and respective computer program products.
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94.发明授权公开(公告)号：US11431982B2
公开(公告)日：2022-08-30
申请号：US17208560
申请日：2021-03-22
IPC分类号： H04N19/132 , H04N19/184 , H04N19/44 , H04N19/176 , H04N19/182
摘要： A method for decoding video includes receiving quantized coefficients representative of a block of video representative of a plurality of pixels. The quantized coefficients are dequantized based upon a function of a remainder. The dequantized coefficients are inverse transformed to determine a decoded residue.
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公开(公告)号：US20220256236A1
公开(公告)日：2022-08-11
申请号：US17627017
申请日：2020-07-15
发明人： Martin Wolters , Kurt Krauss
IPC分类号： H04N21/4402 , H04N21/435
摘要： The present document discloses a method for playback of media content via a delivery channel. The delivery channel may generally refer to the channels through which audio or video programs are delivered (transmitted) to the user (receiver). The media content may generally comprise consecutive media programs. In particular, for a specific media program within the media content, a respective content type for that specific media program is also provided. The method may comprise receiving an indication of the sensitivity of a media program to playback latency. The method may further comprise receiving at least a portion of the media program. The method may yet further comprise adapting the playback of the media program based on the indication of its sensitivity to playback latency.
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公开(公告)号：US20220246155A1
公开(公告)日：2022-08-04
申请号：US17728692
申请日：2022-04-25
IPC分类号： G10L19/002 , H04S5/02 , H04S5/00 , H04S3/02 , G10L19/008
摘要： Methods and systems for advanced stereo processing of an audio signal are disclosed. The methods and systems include selecting a coding mode of either transform coding or linear predictive coding and performing advanced stereo processing when in the selected coding mode. Both encoding and decoding operations are provided.
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公开(公告)号：US11405741B2
公开(公告)日：2022-08-02
申请号：US16768671
申请日：2018-12-18
发明人： Leon Terentiv , Christof Fersch , Daniel Fischer
摘要： A method (900) for rendering audio in a virtual reality rendering environment (180) is described. The method (900) comprises rendering (901) an origin audio signal of an origin audio source (113) of an origin audio scene (111) from an origin source position on a sphere (114) around a listening position (201) of a listener (181). Furthermore, the method (900) comprises determining (902) that the listener (181) moves from the listening position (201) within the origin audio scene (111) to a listening position (202) within a different destination audio scene (112). In addition, the method (900) comprises applying (903) a fade-out gain to the origin audio signal to determine a modified origin audio signal, and rendering (903) the modified origin audio signal of the origin audio source (113) from the origin source position on the sphere (114) around the listening position (201, 202).
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公开(公告)号：US20220157327A1
公开(公告)日：2022-05-19
申请号：US17532775
申请日：2021-11-22
IPC分类号： G10L19/26 , G10L19/20 , G10L19/12 , G10L19/125 , G10L21/003 , G10L19/09 , G10L21/013 , G10L19/22 , G10L21/007 , G10L19/032 , G10L19/02
摘要： In some embodiments, a pitch filter for filtering a preliminary audio signal generated from an audio bitstream is disclosed. The pitch filter has an operating mode selected from one of either: (i) an active mode where the preliminary audio signal is filtered using filtering information to obtain a filtered audio signal, and (ii) an inactive mode where the pitch filter is disabled. The preliminary audio signal is generated in an audio encoder or audio decoder having a coding mode selected from at least two distinct coding modes, and the pitch filter is capable of being selectively operated in either the active mode or the inactive mode while operating in the coding mode based on control information.
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公开(公告)号：US20220103961A1
公开(公告)日：2022-03-31
申请号：US17392116
申请日：2021-08-02
摘要： Methods, systems, and computer program products for rending an audio object having an apparent size are disclosed. An audio processing system receives audio panning data including a first grid mapping first virtual sound sources in a space and speaker positions to speaker gains. The first grid specifies first speaker gains of the first virtual sound sources in the space. The audio processing system determines a second grid of second virtual sound sources in the space, including mapping the first virtual sound sources into the second virtual sound sources of the second virtual sources. The audio processing system selects at least one of the first grid or second grid for rendering an audio object based on an apparent size of the audio object. The audio processing system renders the audio object based on the selected grid or grids.
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公开(公告)号：US20220101865A1
公开(公告)日：2022-03-31
申请号：US17495184
申请日：2021-10-06
IPC分类号： G10L19/02 , G10L21/038 , G10L21/0388 , G10L19/26
摘要： There is provided methods and apparatuses for decoding and encoding of audio signals. In particular, a method for decoding includes receiving a waveform-coded signal having a spectral content corresponding to a subset of the frequency range above a cross-over frequency. The waveform-coded signal is interleaved with a parametric high frequency reconstruction of the audio signal above the cross-over frequency. In this way an improved reconstruction of the high frequency bands of the audio signal is achieved.
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