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公开(公告)号：EP2839460A1
公开(公告)日：2015-02-25
申请号：EP12874814.2
申请日：2012-04-18
申请人： Nokia Corporation
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , H04S1/007 , H04S2420/03
摘要： An apparatus comprising a channel analyser configured to analyse an audio signal comprising at least two audio channels to determine at least one parameter associated with a difference between the at least two audio channels; an encoding mode determiner configured to select a multichannel audio signal encoding dependent on the at least one parameter; and a channel encoder configured to encode the audio signal with the multichannel audio signal encoding.
摘要翻译： 一种设备，包括：信道分析器，被配置为分析包括至少两个音频信道的音频信号，以确定与所述至少两个音频信道之间的差异相关联的至少一个参数; 编码模式确定器，被配置为依赖于所述至少一个参数来选择多声道音频信号编码; 以及信道编码器，被配置为利用多声道音频信号编码对音频信号进行编码。
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公开(公告)号：EP2297729A1
公开(公告)日：2011-03-23
申请号：EP08774555.0
申请日：2008-06-30
申请人： Nokia Corporation
CPC分类号： G10L19/107 , G10L19/032 , G10L19/038 , H03M7/3082
摘要： An apparatus configured to model an encoded signal to estimate at least one distribution of the signal, rotate the signal with respect to a lattice, for lattice quantization of the signal, dependent on the at least one distribution of the signal, and quantize the signal rotated with respect to the lattice.
摘要翻译： 一种装置，被配置为对编码信号进行建模以估计信号的至少一个分布，根据信号的至少一个分布对信号进行相对于晶格的旋转，用于晶格量化，并且量化旋转的信号 关于格子。
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公开(公告)号：EP2127088A1
公开(公告)日：2009-12-02
申请号：EP08701373.6
申请日：2008-01-10
申请人： Nokia Corporation
IPC分类号： H03M7/30
CPC分类号： G10L19/032
摘要： For supporting a selection of a predictive or non-predictive quantization in the scope of an audio signal coding, it is determined whether an error resulting with a non-predictive quantization of an audio signal segment lies below a predetermined threshold value. An audio signal segment quantized with the non-predictive quantization is provided as a part of an encoded audio signal at least in case it is determined that the error resulting with the non-predictive quantization of the audio signal segment lies below a predetermined threshold value. Otherwise, an audio signal segment quantized with predictive quantization is provided as a part of an encoded audio signal.
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公开(公告)号：EP1938314A1
公开(公告)日：2008-07-02
申请号：EP06809541.3
申请日：2006-10-09
申请人： Nokia Corporation
发明人： VASILACHE, Adriana
CPC分类号： G10L19/035 , G10L19/0208
摘要： Audio coding with receiving an input audio signal, splitting the input audio signal into at least two sub- bands, downscaling the at least two sub-band with a factor depending at least on a standard deviation of the corresponding sub-band, companding each of the at least downscaled sub-bands, and quantizing the companded, downscaled sub-bands with a lattice quantizer.
摘要翻译： 音频编码与接收输入音频信号，将输入音频信号分成至少两个子带，以至少取决于对应子带的标准偏差的因子来缩减至少两个子带，压缩每个 至少缩小的子带，并且用格型量化器量化压缩的缩减的子带。
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公开(公告)号：EP1920434A2
公开(公告)日：2008-05-14
申请号：EP06795778.7
申请日：2006-08-25
申请人： Nokia Corporation
发明人： VASILACHE, Adriana , RÄMÖ, Anssi
CPC分类号： H03M7/3082 , G10L19/24 , G10L2019/0004 , G10L2019/0007
摘要： This invention relates to a method, a device and a software application product for N-level quantization of vectors, wherein N is selectable prior to said quantization from a set of at least two pre-defined values that are smaller than or equal to a pre-defined maximum number of levels M. A reproduction vector for each vector is selected from an N-level codebook of N reproduction vectors that are, for each N in said set of at least two pre-defined values, represented by the first N reproduction vectors of the same joint codebook of M reproduction vectors. The invention further relates to a method, a device and a software application product for retrieving reproduction vectors for vectors that have been N-level quantized, to a system for transferring representations of vectors, to a method, a device and a software application product for determining a joint codebook, and to such a joint codebook itself.
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公开(公告)号：EP2777041A1
公开(公告)日：2014-09-17
申请号：EP11875412.6
申请日：2011-11-10
申请人： Nokia Corporation
摘要： It is inter alia disclosed to receive a set of encoded audio parameters for an audio frame, wherein the set comprises indices representing at least two quantized line spectral frequency coefficients, wherein the audio frame when decoded comprises audio samples digitally sampled at a sampling frequency, wherein the sampling frequency is one of a plurality of sampling frequencies for an audio decoder;to convert the indices to the at least two quantized line spectral frequency coefficients; and to determine the sampling frequency for the audio frame by checking the value of a highest order quantized line spectral frequency coefficient of the at least two quantized line spectral frequency coefficients.
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公开(公告)号：EP2212884B1
公开(公告)日：2013-01-02
申请号：EP07822242.9
申请日：2007-11-06
申请人： Nokia Corporation
CPC分类号： G10L19/02 , G10L21/038
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8.发明公开METHOD AND APPARATUS FOR FAST NEARESTNEIGHBOR SEARCH FOR VECTOR QUANTIZERS 有权方法和设备，用于VENTORQUANTISIERER THE NEXT邻居快速搜索
公开(公告)号：EP2304722A1
公开(公告)日：2011-04-06
申请号：EP09797545.2
申请日：2009-07-02
申请人： Nokia Corporation
CPC分类号： G10L19/00 , G10L2019/0013 , H03M7/3082 , H04B1/7075
摘要： A method comprises identifying a component k of a codevector from a codebook C having one or more codevectors, the component k introducing highest variance for an input vector; allowing ordering of codevectors in the codebook C; and searching for a best match vector for the input vector using ordered codevectors.
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公开(公告)号：EP2220646A1
公开(公告)日：2010-08-25
申请号：EP07822241.1
申请日：2007-11-06
申请人： Nokia Corporation
CPC分类号： G10L19/0208 , G10L21/038
摘要： An encoder for encoding an audio signal. The encoder is configured to determine at least one characteristic of the audio signal; divide the audio signal into at least a low frequency portion and a high frequency portion, and generate from the high frequency portion a plurality of high frequency band signals dependent on the at least one characteristic of the audio signal. The encoder further determines for each of the plurality of high frequency band signals at least part of the low frequency portion which can represent the high frequency band signal.
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公开(公告)号：EP2212884A1
公开(公告)日：2010-08-04
申请号：EP07822242.9
申请日：2007-11-06
申请人： Nokia Corporation
IPC分类号： G10L21/02
CPC分类号： G10L19/02 , G10L21/038
摘要： An encoder for encoding an audio signal, wherein the encoder is configured to define a set of single frequency components; and select at least one single frequency component from a first sub-set of the set of single frequency components.
摘要翻译： 一种用于对音频信号进行编码的编码器，其中编码器被配置为定义一组单频分量; 并且从该组单频分量的第一子集中选择至少一个单频分量。
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