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91. 发明申请

US20220038818A1 Optimized Audio Forwarding 有权
公开(公告)号：US20220038818A1
公开(公告)日：2022-02-03
申请号：US17504857
申请日：2021-10-19
申请人： Google LLC
发明人： Antoine Soulier , Thomas Girardier
IPC分类号： H04R3/12 , G10L19/008 , G10L19/032 , G10L19/16 , H04R5/04 , H04S1/00 , H04W4/80 , H04R5/02
摘要： Methods and systems for optimizing a routing of audio data to audio transmitting devices using a Bluetooth network are disclosed. One method includes receiving an encoded audio bitstream at a first speaker of the audio rendering system comprising a first and a second audio channels, separating a first set of spectral components of the first audio channel and a second set of spectral components of the second audio channel from the encoded audio bitstream, without decoding the audio bitstream, generating a first encoded bitstream from the first set of spectral components, and forwarding the first encoded bitstream to a second speaker of the audio rendering system over the wireless link.

92. 发明授权

US11217260B2 Audio decoder, audio encoder, method for providing a decoded audio signal, method for providing an encoded audio signal, audio stream, audio stream provider and computer program using a stream identifier 有权
公开(公告)号：US11217260B2
公开(公告)日：2022-01-04
申请号：US16506863
申请日：2019-07-09
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Max Neuendorf , Matthias Felix , Matthias Hildenbrand , Lukas Schuster , Ingo Hofmann , Bernd Herrmann , Nikolaus Rettelbach
IPC分类号： G10L19/22 , G10L19/16
摘要： An audio decoder for providing a decoded audio signal representation on the basis of an encoded audio signal representation is configured to adjust decoding parameters in dependence on a configuration information, to decode one or more audio frames using a current configuration information, to compare a configuration information in a configuration structure associated with one or more frames to be decoded by the current configuration information, and to make a transition to perform decoding using the configuration information in the configuration structure associated with the one or more frames to be decoded as a new configuration information if the configuration information in the configuration structure associated with the one or more frames to be decoded, or a relevant portion thereof, is different from the current configuration information, and to consider a stream identifier information included in the configuration structure when comparing the configuration information.

93. 发明申请

US20210398547A1 METHOD AND APPARATUS FOR ENCODING AND DECODING AUDIO SIGNAL TO REDUCE QUANTIZATION NOISE 有权
公开(公告)号：US20210398547A1
公开(公告)日：2021-12-23
申请号：US17331416
申请日：2021-05-26
申请人： Electronics and Telecommunications Research Institute
发明人： Seung Kwon BEACK , Jongmo SUNG , Mi Suk LEE , Tae Jin LEE , Woo-taek LIM , Inseon JANG
IPC分类号： G10L19/035 , G10L19/022 , G10L19/06 , G10L19/16
摘要： An audio signal encoding method performed by an encoder includes identifying an audio signal of a time domain in units of a block, generating a combined block by combining i) a current original block of the audio signal and ii) a previous original block chronologically adjacent to the current original block, extracting a first residual signal of a frequency domain from the combined block using linear predictive coding of a time domain, overlapping chronologically adjacent first residual signals among first residual signals converted into a time domain, and quantizing a second residual signal of a time domain extracted from the overlapped first residual signal by converting the second residual signal of the time domain into a frequency domain using linear predictive coding of a frequency domain.

94. 发明申请

US20210358509A1 DIRECT MAPPING 有权
公开(公告)号：US20210358509A1
公开(公告)日：2021-11-18
申请号：US17443406
申请日：2021-07-26
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Shafagh Kamkar , Dylan A. Hester , Bruce E. Duewer
IPC分类号： G10L19/16 , H03M5/08 , H03M5/14 , G06F3/16 , G10L19/02 , G10L19/032 , G10L19/26
摘要： A single-bit audio stream can be converted to a modified single-bit audio stream with a constant edge rate while maintaining a modulation index of the original audio stream using direct mapping. With direct mapping, a pre-filter bank may be combined with a multi-bit symbol mapper to select symbols for the modified audio stream with a constant edge rate per symbol and the same modulation index as the original audio stream. The output of the pre-filter bank may be an audio stream with no consecutive full-scale symbols. Using the output of the pre-filter bank, a multi-bit symbol mapper may use the symbol selector to output a symbol with a constant edge rate per symbol and the same modulation index as the original signal. The symbols may be converted to an analog signal for reproduction of audio content using a transducer.

95. 发明申请

US20210337250A1 A METHOD AND DEVICE FOR COMBINING AUDIO AND VIDEO DATA STREAMS 有权
公开(公告)号：US20210337250A1
公开(公告)日：2021-10-28
申请号：US16317867
申请日：2018-06-14
申请人： WANGSU SCIENCE & TECHNOLOGY CO., LTD.
发明人： Xuehui HUANG , Shibiao LV
IPC分类号： H04N21/234 , G10L25/57 , G10L19/16 , H04N21/232 , H04N21/233 , H04N21/2343 , H04N21/231 , H04N21/8547
摘要： A method for combining audio/video data streams includes: acquiring audio/video data of a target data stream, and storing the audio/video data in a first storage space; reading and decoding audio/video frames of the audio/video data from the first storage space according to an order of timestamps of the audio/video frames of the audio/video data; resampling the decoded audio/video frames based on preset audio/video output parameters; generating position indexes according to timestamps of the resampled audio/video frames, and storing the resampled audio/video frames in a second storage space through the position indexes; and periodically extracting the audio/video frames from the second storage space according to the position indexes, and combining the extracted audio/video frames with audio/video frames of other data streams.

96. 发明授权

US11127406B2 Encoding and decoding of interchannel phase differences between audio signals 有权
公开(公告)号：US11127406B2
公开(公告)日：2021-09-21
申请号：US16682426
申请日：2019-11-13
申请人： QUALCOMM Incorporated
发明人： Venkata Subrahmanyam Chandra Sekhar Chebiyyam , Venkatraman Atti
IPC分类号： H04R5/00 , G10L19/008 , G10L19/22 , G10L19/16 , G10L19/002
摘要： A device for processing audio signals includes an interchannel phase difference (IPD) mode selector and an IPD estimator. The IPD mode selector is configured to select an IPD mode from among at least a first IPD mode and a second IPD mode based on at least an interchannel temporal mismatch value indicative of a temporal misalignment between a first audio signal and a second audio signal. The IPD estimator is configured to determine IPD values based on the first audio signal and the second audio signal, the IPD values represented using a first number of bits responsive to selection of the first IPD mode or represented using a second number of bits responsive to selection of the second IPD mode.

97. 发明授权

US11120810B2 Recording device 有权
公开(公告)号：US11120810B2
公开(公告)日：2021-09-14
申请号：US16703734
申请日：2019-12-04
申请人： Yi-Jou Wang
发明人： Yi-Jou Wang
IPC分类号： G10L19/22 , G10L19/16 , G10L25/60
摘要： A recording device comprises a first transmission unit, a switching and control unit, a sound quality sampling and encoding-decoding unit, a second transmission unit, a data access unit, a data writing unit, and a memory unit. A first digital audio source signal of an electronic device is transmitted from the first transmission unit to the switching and control unit. The sound quality sampling and encoding-decoding unit is electrically connected to the switching and control unit, receives and converts the aforementioned signal into a first digital audio signal and a first analog audio source signal. A second analog audio source signal of an audio receiving and transmitting device is converted into a second digital audio signal by the sound quality sampling and encoding-decoding unit. The data writing unit receives the first and second digital audio signals and writes the first and second digital audio signals into the memory unit.

98. 发明授权

US11109440B2 Discontinuous transmission on short-range packet-based radio links 有权
公开(公告)号：US11109440B2
公开(公告)日：2021-08-31
申请号：US16179747
申请日：2018-11-02
申请人： Plantronics, Inc.
发明人： Jacobus Cornelis Haartsen
IPC分类号： G10L25/93 , G10L25/78 , H04W76/28 , G10L19/16 , G10L25/84 , H04L1/18 , H04W52/02
摘要： Described herein are systems and methods for discontinuous transmission on short-range packet-based radio links. As one option, during a communication session with a far-end system on a short-range packet-based radio link, an audio stream received on an audio line in is monitored for voice-based signals. Based on monitoring the audio stream for the voice-based signals, a voice activity estimation signal is generated. While the voice activity estimation signal exceeds a predetermined threshold, one or more voice packets are generated based on the audio stream, and transmitted to the far-end system at one or more times. Also, in response to determining that the voice activity estimation signal is below the predetermined threshold, one or more zero-payload packets are transmitted to the far-end system at one or more subsequent times.

99. 发明授权

US11107481B2 Low-complexity packet loss concealment for transcoded audio signals 有权
公开(公告)号：US11107481B2
公开(公告)日：2021-08-31
申请号：US16379479
申请日：2019-04-09
申请人： Dolby Laboratories Licensing Corporation
发明人： Raphael Marc Ullmann , Glenn N. Dickins
IPC分类号： G10L19/005 , G10L19/022 , G10L19/16 , H04L29/06 , G10L19/02
摘要： Systems and methods are described for concealing packet loss in a received audio stream. Packets of the audio stream may be received in a non-lapped transform domain format, where at least one packet is missing in the stream. The received packets are decoded, and each missing packet in the decoded stream is replaced by a reduced-energy signal block. Each reduced-energy signal block may also be modified at a beginning or ending boundary, and shifted such that a start or end of each missing packet does not coincide with a peak of a transform window of a lapped transform domain format. The raw audio signal may then be encoded into transform windows having the lapped transform domain format. Packet loss concealment may then be performed for selected transform windows that include modified reduced-energy blocks, either prior to transmission or after transmission by the receiving endpoint.

100. 发明授权

US11075762B2 Metadata transcoding 有权
公开(公告)号：US11075762B2
公开(公告)日：2021-07-27
申请号：US16717441
申请日：2019-12-17
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： Andreas Schneider , Christof Fersch , Martin Wolters , Jeffrey Riedmiller , Scott Gregory Norcross , Michael Grant
IPC分类号： H04L9/32 , H04H60/73 , H04N21/435 , G10L19/16 , H04N21/235 , H04N19/40 , H04L29/06
摘要： The present document relates to transcoding of metadata, and in particular to a method and system for transcoding metadata with reduced computational complexity. A transcoder configured to transcode an inbound bitstream comprising an inbound content frame and an associated inbound metadata frame into an outbound bitstream comprising an outbound content frame and an associated outbound metadata frame is described. The inbound content frame is indicative of a signal encoded according to a first codec system and the outbound content frame is indicative of the signal encoded according to a second codec system. The transcoder is configured to identify an inbound block of metadata from the inbound metadata frame, the inbound block of metadata associated with an inbound descriptor indicative of one or more properties of metadata comprised within the inbound block of metadata, and to generate the outbound metadata frame from the inbound metadata frame based on the inbound descriptor.

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