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公开(公告)号：US20220406319A1
公开(公告)日：2022-12-22
申请号：US17891967
申请日：2022-08-19
Applicant: QUALCOMM Incorporated
IPC: G10L19/087 , G10L19/24 , G10L19/02 , G10L19/03 , G10L19/16
Abstract: A device for signal processing includes a memory and a processor. The memory is configured to store a parameter associated with a bandwidth-extended audio stream. The processor is configured to select a plurality of non-linear processing functions based at least in part on a value of the parameter. The processor is also configured to generate a high-band excitation signal based on the plurality of non-linear processing functions.
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公开(公告)号：US20210183398A1
公开(公告)日：2021-06-17
申请号：US17188262
申请日：2021-03-01
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L21/0388 , G10L19/04 , G10L19/02
Abstract: A device includes an encoder configured to generate a first high-band portion of a first signal based on a left signal and a right signal. The encoder is also configured to generate a set of adjustment gain parameters based on a high-band non-reference signal and a synthesized signal. The high-band non-reference signal corresponds to one of a left high-band portion of the left signal or a right high-band portion of the right signal.
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公开(公告)号：US20210065727A1
公开(公告)日：2021-03-04
申请号：US17083254
申请日：2020-10-28
Applicant: QUALCOMM Incorporated
IPC: G10L19/087 , G10L19/24 , G10L19/02 , G10L19/03 , G10L19/16
Abstract: A device for signal processing includes a memory and a processor. The memory is configured to store a parameter associated with a bandwidth-extended audio stream. The processor is configured to select a plurality of non-linear processing functions based at least in part on a value of the parameter. The processor is also configured to generate a high-band excitation signal based on the plurality of non-linear processing functions.
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公开(公告)号：US20200013416A1
公开(公告)日：2020-01-09
申请号：US16576401
申请日：2019-09-19
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/005 , G10L19/26 , G10L19/02
Abstract: A method includes decoding a low-band portion of an encoded mid channel to generate a decoded low-band mid channel. The method also includes filtering the decoded low-band mid channel according to one or more filter coefficients to generate a low-band filtered mid channel. The method also includes generating an inter-channel predicted signal based on the low-band filtered mid channel and the inter-channel prediction gain. The method further includes generating a low-band left channel and a low-band right channel based on an up-mix factor, the decoded low-band mid channel, and the inter-channel predicted signal.
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公开(公告)号：US20190318750A1
公开(公告)日：2019-10-17
申请号：US16452912
申请日：2019-06-26
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/02 , G10L21/0388 , G10L19/04
Abstract: A device includes an encoder and a transmitter. The encoder is configured to generate a first high-band portion of a first signal based on a left signal and a right signal. The encoder is also configured to generate a set of adjustment gain parameters based on a high-band non-reference signal. The high-band non-reference signal corresponds to one of a left high-band portion of the left signal or a right high-band portion of the right signal as a high-band non-reference signal. The transmitter is configured to transmit information corresponding to the first high-band portion of the first signal. The transmitter is also configured to transmit the set of adjustment gain parameters corresponding to the high-band non-reference signal.
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Patent Agency Ranking
公开(公告)号：US20190147895A1
公开(公告)日：2019-05-16
申请号：US16245161
申请日：2019-01-10
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , H04S3/00
Abstract: A residual scaling unit is configured to determine a scaling factor for a residual channel based on an inter-channel mismatch value. The inter-channel mismatch value is indicative of a temporal misalignment between a reference channel and a target channel. The residual scaling unit is further configured to scale (e.g., attenuate) the residual channel by the scaling factor to generate a scaled residual channel. A residual channel encoder is configured to encode the scaled residual channel as part of a bitstream.
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公开(公告)号：US20190108845A1
公开(公告)日：2019-04-11
申请号：US16147187
申请日：2018-09-28
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/20 , H04S3/02 , H04S7/00
Abstract: A device includes a receiver and a decoder. The receiver is configured to receive bitstream parameters corresponding to at least an encoded mid signal. The decoder is configured to generate a synthesized mid signal based on the bitstream parameters. The decoder is also configured to generate one or more upmix parameters. An upmix parameter of the one or more upmix parameters having a first value or a second value based on determining whether the bitstream parameters correspond to an encoded side signal. The first value is based on a received downmix parameter. The second value is based at least in part on a default parameter value. The decoder is further configured to generate an output signal based on the synthesized mid signal and the one or more upmix parameters.
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公开(公告)号：US20190108843A1
公开(公告)日：2019-04-11
申请号：US16147071
申请日：2018-09-28
Applicant: QUALCOMM Incorporated
IPC: G10L19/008
Abstract: A device includes a receiver and a decoder. The receiver is configured to receive one or more upmix parameters, one or more inter-channel bandwidth extension parameters, one or more inter-channel prediction gain parameters, and an encoded audio signal. The encoded audio signal includes an encoded mid signal. The decoder is configured to generate a synthesized mid signal based on the encoded mid signal. The decoder is also configured to generate a synthesized side signal based on the synthesized mid signal and the one or more inter-channel prediction gain parameters. The decoder is further configured to generate one or more output signals based on the synthesized mid signal, the synthesized side signal, the one or more upmix parameters, and the one or more inter-channel bandwidth extension parameters.
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公开(公告)号：US20180261232A1
公开(公告)日：2018-09-13
申请号：US15890670
申请日：2018-02-07
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/16 , H04S5/02
Abstract: A method includes selecting, at an encoder of a first device, a left channel or a right channel as a non-reference target channel based on a high-band reference channel indicator. The method also includes generating a synthesized non-reference high-band channel based on a non-reference high-band excitation corresponding to the non-reference target channel. The method also includes generating a high-band portion of the non-reference target channel. The method further includes estimating one or more spectral mapping parameters based on the synthesized non-reference high-band channel and the high-band portion of the non-reference target channel. The method also includes applying the one or more spectral mapping parameters to the synthesized non-reference high-band channel to generate a spectrally shaped synthesized non-reference high-band channel. The method further includes generating an encoded bitstream based on the one or more spectral mapping parameters and the spectrally shaped synthesized non-reference high-band channel.
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公开(公告)号：US20180226080A1
公开(公告)日：2018-08-09
申请号：US15884136
申请日：2018-01-30
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , H04S3/00
CPC classification number: G10L19/008 , G10L19/022 , H04R3/005 , H04S3/008
Abstract: A method includes generating a windowed time-domain mid channel by applying two first asymmetric windows to a first frame of a time-domain mid channel and applying two second asymmetric windows to a second frame of the time-domain mid channel. The method includes transforming the windowed time-domain mid channel to a transform domain to generate sets of transform-domain mid channel data including first transform-domain mid channel data corresponding to a first mid channel window of the first frame and second transform-domain mid channel data corresponding to a second mid channel window of the first frame. The method includes performing an up-mix operation using the sets of transform-domain mid channel data, stereo parameters from the bit stream, and an interpolated parameter determined using an unevenly weighted interpolation between a first stereo parameter value associated with the first frame and a second stereo parameter value associated with the second frame.
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