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公开(公告)号：US11967330B2
公开(公告)日：2024-04-23
申请号：US17635183
申请日：2020-08-13
IPC分类号： G10L19/083 , G10L19/16
CPC分类号： G10L19/083 , G10L19/167
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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公开(公告)号：US20180075853A1
公开(公告)日：2018-03-15
申请号：US15817296
申请日：2017-11-20
IPC分类号： G10L19/083 , G10L21/038 , G10L19/02 , G10L25/93 , G10L21/0388 , G10L19/005 , G10L19/24
CPC分类号： G10L19/083 , G10L19/005 , G10L19/0204 , G10L19/24 , G10L21/038 , G10L21/0388 , G10L25/93 , G10L2025/932
摘要： A method for recovering a lost frame in a received audio signal includes: obtaining an initial high-frequency band signal of a current lost frame in the received audio signal; calculating a ratio R, wherein the ratio R is a ratio of a high frequency excitation energy of a previous frame of the current lost frame to a high frequency excitation energy of the current lost frame; obtaining a global gain of the current lost frame according to the ratio R and a global gain of the previous frame of the current lost frame; and recovering a high-frequency band signal of the current lost frame according to the initial high-frequency band signal of the current lost frame and the global gain of the current lost frame. The method can be used in an audio signal decoding process for low-loss recovery of lost frames of the audio signal.
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公开(公告)号：US09911432B2
公开(公告)日：2018-03-06
申请号：US14896651
申请日：2014-06-24
申请人： ORANGE
IPC分类号： G10L19/08 , G10L21/0388 , G10L21/038 , G10L19/012 , G10L19/06 , G10L19/083 , G10L19/12 , G10L19/26
CPC分类号： G10L21/0388 , G10L19/012 , G10L19/06 , G10L19/08 , G10L19/083 , G10L19/12 , G10L19/26 , G10L21/038
摘要： The invention relates to a method for extending the frequency band of an audio signal during a decoding or improvement process comprising a step of decoding or extracting, in a first so-called low frequency band, an excitation signal and coefficients of a linear prediction filter. The method comprises the following steps: —obtaining a signal extended in at least a second frequency band higher than the first frequency band from an oversampled excitation signal extended in at least a second frequency band; —scaling the extended signal by means of a gain defined by subframe on the basis of an energy ratio of a frame and of a subframe; —filtering said scaled extended signal with a linear prediction filter of which the coefficients are derived from the coefficients of the low frequency band filter. The invention also relates to a frequency band extension device implementing the described method and a decoder comprising such a device.
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4.发明申请公开(公告)号：US20180053517A1
公开(公告)日：2018-02-22
申请号：US15799853
申请日：2017-10-31
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
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公开(公告)号：US09852738B2
公开(公告)日：2017-12-26
申请号：US15385881
申请日：2016-12-21
IPC分类号： G10L19/005 , G10L21/038 , G10L21/0388 , G10L19/083 , G10L19/02 , G10L25/93 , G10L19/24
CPC分类号： G10L19/083 , G10L19/005 , G10L19/0204 , G10L19/24 , G10L21/038 , G10L21/0388 , G10L25/93 , G10L2025/932
摘要： Embodiments of the present application provide a method and an apparatus for recovering a lost frame in a received audio signal. The method for recovering a lost frame includes: determining an initial high-frequency band signal of a current lost frame; determining a gain of the current lost frame; determining gain adjustment information of the current lost frame; adjusting the gain of the current lost frame according to the gain adjustment information, to obtain an adjusted gain of the current lost frame; and adjusting the initial high-band signal according to the adjusted gain, to obtain a high-frequency band signal of the current lost frame. The method and the apparatus for recovering a lost frame provided in the embodiments of the present application can be used in an audio signal decoding process for low-loss recovery of a lost frame of the audio signal, resulting in improved performance of an audio signal decoder.
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公开(公告)号：US20170243593A1
公开(公告)日：2017-08-24
申请号：US15587667
申请日：2017-05-05
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
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公开(公告)号：US09715883B2
公开(公告)日：2017-07-25
申请号：US15153501
申请日：2016-05-12
发明人： Ralf Geiger , Guillaume Fuchs , Markus Multrus , Bernhard Grill
CPC分类号： G10L19/12 , G10L19/03 , G10L19/04 , G10L19/083 , G10L19/20 , G10L2019/0002
摘要： In an embodiment, bitstream elements of sub-frames are encoded differentially to a global gain value so that a change of the global gain value results in an adjustment of an output level of the decoded representation of the audio content. Concurrently, the differential coding saves bits. Even further, the differential coding enables the lowering of the burden of globally adjusting the gain of an encoded bitstream. In another embodiment, a global gain control across CELP coded frames and transform coded frames is achieved by co-controlling the gain of the codebook excitation of the CELP codec, along with a level of the transform or inverse transform of the transform coded frames. In another embodiment, the gain value determination in CELP coding is performed in the weighted domain of the excitation signal.
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公开(公告)号：US09691396B2
公开(公告)日：2017-06-27
申请号：US14470559
申请日：2014-08-27
IPC分类号： G10L19/00 , G10L19/083 , G10L19/02
CPC分类号： G10L19/00 , G10L19/0204 , G10L19/083
摘要： The present invention discloses a speech/audio signal processing method and apparatus. In an embodiment, the speech/audio signal processing method includes: when a speech/audio signal switches bandwidth, obtaining an initial high frequency signal corresponding to a current frame of speech/audio signal; obtaining a time-domain global gain parameter of the initial high frequency signal; performing weighting processing on an energy ratio and the time-domain global gain parameter, and using an obtained weighted value as a predicted global gain parameter, where the energy ratio is a ratio between energy of a historical frame of high frequency time-domain signal and energy of a current frame of initial high frequency signal; correcting the initial high frequency signal by using the predicted global gain parameter, to obtain a corrected high frequency time-domain signal; and synthesizing a current frame of narrow frequency time-domain signal and the corrected high frequency time-domain signal and outputting the synthesized signal.
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9.发明申请公开(公告)号：US20170169833A1
公开(公告)日：2017-06-15
申请号：US15442980
申请日：2017-02-27
CPC分类号： G10L19/20 , G10L19/005 , G10L19/018 , G10L19/0212 , G10L19/083 , G10L19/125 , G10L19/24 , G10L25/93
摘要： Described are an encoder for coding speech-like content and/or general audio content, wherein the encoder is configured to embed, at least in some frames, parameters in a bitstream, which parameters enhance a concealment in case an original frame is lost, corrupted or delayed, and a decoder for decoding speech-like content and/or general audio content, wherein the decoder is configured to use parameters which are sent later in time to enhance a concealment in case an original frame is lost, corrupted or delayed, as well as a method for encoding and a method for decoding.
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公开(公告)号：US20170103764A1
公开(公告)日：2017-04-13
申请号：US15385881
申请日：2016-12-21
IPC分类号： G10L19/083 , G10L19/02 , G10L25/93 , G10L19/005
CPC分类号： G10L19/083 , G10L19/005 , G10L19/0204 , G10L19/24 , G10L21/038 , G10L21/0388 , G10L25/93 , G10L2025/932
摘要： Embodiments of the present application provide a method and an apparatus for recovering a lost frame in a received audio signal. The method for recovering a lost frame includes: determining an initial high-frequency band signal of a current lost frame; determining a gain of the current lost frame; determining gain adjustment information of the current lost frame; adjusting the gain of the current lost frame according to the gain adjustment information, to obtain an adjusted gain of the current lost frame; and adjusting the initial high-band signal according to the adjusted gain, to obtain a high-frequency band signal of the current lost frame. The method and the apparatus for recovering a lost frame provided in the embodiments of the present application can be used in an audio signal decoding process for low-loss recovery of a lost frame of the audio signal, resulting in improved performance of an audio signal decoder.
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