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公开(公告)号：US10943593B2
公开(公告)日：2021-03-09
申请号：US16542440
申请日：2019-08-16
IPC分类号： G10L21/00 , G10L19/00 , G10L21/04 , G10L19/087 , G10L25/72 , G10L19/24 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US10943594B2
公开(公告)日：2021-03-09
申请号：US16546898
申请日：2019-08-21
IPC分类号： G10L21/00 , G10L19/00 , G10L21/04 , G10L19/087 , G10L25/72 , G10L19/24 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US10668760B2
公开(公告)日：2020-06-02
申请号：US15869560
申请日：2018-01-12
IPC分类号： G10L19/00 , B41K3/56 , G10L21/038 , B41K1/04 , B41K1/10 , B41K1/12 , B41K1/38 , B41K1/40 , B41K1/42 , G10L19/02 , G10L25/21 , G10L19/26
摘要： A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.
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公开(公告)号：US11312164B2
公开(公告)日：2022-04-26
申请号：US16926818
申请日：2020-07-13
IPC分类号： G10L21/038 , B41K3/56 , B41K1/04 , B41K1/10 , B41K1/12 , B41K1/38 , B41K1/40 , B41K1/42 , G10L19/02 , G10L25/21 , G10L19/26 , G10L21/02 , G10L19/00
摘要： A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.
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公开(公告)号：US10783895B2
公开(公告)日：2020-09-22
申请号：US16556332
申请日：2019-08-30
IPC分类号： G10L19/00 , G10L21/00 , G10L21/04 , G10L19/087 , G10L25/72 , G10L19/24 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US10446163B2
公开(公告)日：2019-10-15
申请号：US14904555
申请日：2014-07-04
IPC分类号： G10L19/00 , G10L21/00 , G10L21/04 , G10L19/087 , G10L19/24 , G10L25/72 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency band and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US10438600B2
公开(公告)日：2019-10-08
申请号：US15715819
申请日：2017-09-26
IPC分类号： G10L19/00 , G10L21/00 , G10L21/04 , G10L19/087 , G10L19/24 , G10L25/72 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US10354664B2
公开(公告)日：2019-07-16
申请号：US15715785
申请日：2017-09-26
IPC分类号： G10L19/00 , G10L21/00 , G10L21/04 , G10L19/087 , G10L19/24 , G10L25/72 , G10L21/038
摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.
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公开(公告)号：US11325407B2
公开(公告)日：2022-05-10
申请号：US16939104
申请日：2020-07-27
IPC分类号： G10L21/038 , B41K3/56 , B41K1/04 , B41K1/10 , B41K1/12 , B41K1/38 , B41K1/40 , B41K1/42 , G10L19/02 , G10L25/21 , G10L19/26 , G10L21/02 , G10L19/00
摘要： A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.
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公开(公告)号：US10730329B2
公开(公告)日：2020-08-04
申请号：US16011153
申请日：2018-06-18
IPC分类号： G10L19/00 , B41K3/56 , G10L21/038 , B41K1/04 , B41K1/10 , B41K1/12 , B41K1/38 , B41K1/40 , B41K1/42 , G10L19/02 , G10L25/21 , G10L19/26
摘要： A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.
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