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公开(公告)号：US20180204579A1
公开(公告)日：2018-07-19
申请号：US15836618
申请日：2017-12-08
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , H04S3/00 , H04R5/02
CPC classification number: G10L19/008 , H04R5/02 , H04S3/008 , H04S2400/15 , H04S2420/03
Abstract: A method includes performing modifying, at a decoder, at least a portion of inter-channel phase difference (IPD) parameter values based on a mismatch value to generate modified IPD parameter values. The mismatch value is indicative of an amount of temporal misalignment between an encoder-side reference channel and an encoder-side target channel. The modified IPD parameter values are applied to a decoded frequency-domain mid channel during an up-mix operation.
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公开(公告)号：US20180122385A1
公开(公告)日：2018-05-03
申请号：US15711538
申请日：2017-09-21
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/02 , H04S3/00
CPC classification number: G10L19/008 , G10L19/0212 , G10L19/022 , G10L19/26 , G10L21/055 , H04S1/007 , H04S3/008 , H04S2420/03
Abstract: A device includes a receiver configured to receive an encoded bitstream from a second device. The encoded bitstream includes a temporal mismatch value determined based on a reference channel captured at the second device and a target channel captured at the second device. The device also includes a decoder configured to decode the encoded bitstream to generate a first frequency-domain output signal and a second frequency-domain output signal. The decoder is configured to perform inverse transform operations on the frequency-domain output signals to generate a first and second time-domain signals. Based on the temporal mismatch value, the decoder is configured to map the time-domain signals to a decoded target channel and a decoded reference channel. The decoder is also configured to perform a causal time-domain shift operation on the decoded target channel based on the temporal mismatch value to generate an adjusted decoded target channel.
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公开(公告)号：US20240031755A1
公开(公告)日：2024-01-25
申请号：US18210632
申请日：2023-06-15
Applicant: QUALCOMM Incorporated
IPC: H04S3/00 , H04S1/00 , G10L19/008
CPC classification number: H04S3/008 , H04S1/007 , G10L19/008 , G10L19/022
Abstract: An apparatus includes a receiver and an up-mixer. The receiver is configured to receive a bitstream that includes an encoded mid signal and encoded stereo parameter information. The encoded stereo parameter information represents a first value of a stereo parameter and a second value of the stereo parameter. The first value is associated with a first frequency range. The second value is associated with a second frequency range that is distinct from the first frequency range. The up-mixer is configured to perform an up-mix operation on a frequency-domain decoded mid signal generated from the encoded mid signal. A particular value based on the first value and the second value is applied to the frequency-domain decoded mid signal during the up-mix operation.
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公开(公告)号：US20190341063A1
公开(公告)日：2019-11-07
申请号：US16511386
申请日：2019-07-15
Applicant: QUALCOMM Incorporated
IPC: G10L19/03 , G10L21/038 , G10L21/0388 , G10L19/008
Abstract: A method includes processing a time-domain decoded high-band mid signal to generate a time-domain high-band residual prediction signal. The method also includes generating a high-band left channel and a high-band right channel based on the time-domain decoded high-band mid signal and the time-domain high-band residual prediction signal.
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公开(公告)号：US20190259392A1
公开(公告)日：2019-08-22
申请号：US16379393
申请日：2019-04-09
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/12 , G10L19/005
Abstract: A method of encoding audio channels includes receiving two or more channels at an encoder and identifying a target channel and a reference channel. The target channel and the reference channel are identified from the two or more channels based on a mismatch value. The method also includes generating a modified target channel by temporally adjusting the target channel based on the mismatch value. The mismatch value is indicative of an amount of temporal mismatch between the target channel and the reference channel. The method also includes determining a temporal correlation value indicative of a temporal correlation between a first signal associated with the reference channel and a second signal associated with the modified target channel. The method also includes comparing the temporal correlation value to a threshold. The method further includes generating missing target samples based on the comparison, a coder type, or both.
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Patent Agency Ranking
公开(公告)号：US20190147893A1
公开(公告)日：2019-05-16
申请号：US16243636
申请日：2019-01-09
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/16 , G10L19/22
Abstract: 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 based on at least a strength value associated with 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 have a resolution corresponding to the selected IPD mode.
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公开(公告)号：US20190108844A1
公开(公告)日：2019-04-11
申请号：US16147124
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 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 a synthesized side signal selectively based on the bitstream parameters in response to determining whether the bitstream parameters correspond to an encoded side signal.
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公开(公告)号：US20190005970A1
公开(公告)日：2019-01-03
申请号：US16003704
申请日：2018-06-08
Applicant: QUALCOMM Incorporated
IPC: G10L19/008 , G10L19/02 , G10L19/26 , G10L19/005
CPC classification number: G10L19/008 , G10L19/005 , G10L19/0204 , G10L19/26 , G10L21/038
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：US20180352092A1
公开(公告)日：2018-12-06
申请号：US15954587
申请日：2018-04-16
Applicant: QUALCOMM Incorporated
Inventor： Vivek RAJENDRAN , Nikolai Konrad LEUNG , Min WANG , Venkatraman ATTI
CPC classification number: H04M7/0072 , H04L65/80 , H04L69/24 , H04W24/08 , H04W36/0022 , H04W36/0094
Abstract: The disclosure generally relates to various methods to increase network coverage with respect to Voice-over-Internet Protocol (VoIP) sessions and/or other voice-based multimedia services. In particular, when establishing a voice session, two or more terminals may perform a codec negotiation to exchange information related to supported multimedia codecs and/or codec modes, jitter buffer management (JBM), and packet loss concealment (PLC) capabilities. Based on the exchanged information, a message may be sent to a base station to indicate the maximum packet loss rate (PLR) for each terminal. Additional techniques may ensure that the terminals use the most robust codecs or codec modes that are available when nearing the edge of coverage to help avoid unnecessary and/or excessive handovers to different radio access technologies.
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公开(公告)号：US20180308505A1
公开(公告)日：2018-10-25
申请号：US15956645
申请日：2018-04-18
Applicant: QUALCOMM Incorporated
IPC: G10L21/0388 , G10L19/008
Abstract: A device includes a multi-channel encoder configured to receive a first audio signal and a second audio signal, to perform a downmix operation on the first audio signal and the second audio signal to generate a mid signal, to generate a low-band mid signal and a high-band mid signal based on the mid signal, and to determine, based at least partially on a low band voicing value corresponding to the low band signal and a gain value corresponding to the high-band mid signal, a value of a multi-source flag that flag associated with the high-band mid signal. The multi-channel encoder is configured to generate a high-band mid excitation signal based on the multi-source flag and to generate a bitstream based on the high-band mid excitation signal. The device also includes a transmitter configured to transmit the bitstream and the multi-source flag to a second device.
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