专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

AP201508800A0 COMPANDING APPARATUS AND METHOD TO REDUCE QUANTIZATION NOISE USING ADVANCED SPECTRAL EXTENSION 未知
公开(公告)号：AP201508800A0
公开(公告)日：2015-10-31
申请号：AP201508800
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： MELKOTE VINAY , BISWAS ARIJIT , HEDELIN PER
IPC分类号： H04B1/64 , G03G7/00 , G10L21/034 , H03G3/24
CPC分类号： G10L21/0232 , G10L19/008 , G10L19/0208 , G10L19/032 , G10L21/034 , G10L25/18 , G10L25/45 , H03G7/007 , H04B1/66
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to the substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.

2. 发明专利

AP2015008800A0 COMPANDING APPARATUS AND METHOD TO REDUCE QUANTIZATION NOISE USING ADVANCED SPECTRAL EXTENSION 未知
公开(公告)号：AP2015008800A0
公开(公告)日：2015-10-31
申请号：AP2015008800
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： MELKOTE VINAY , BISWAS ARIJIT , HEDELIN PER
IPC分类号： H04B1/64 , G03G7/00 , G10L21/034 , H03G3/24
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuate segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.

3. 发明专利

UA110768C2 СИСТЕМА КОМПАНДУВАННЯ ТА СПОСІБ ЗНИЖЕННЯ ШУМУ КВАНТУВАННЯ З ВИКОРИСТАННЯМ УДОСКОНАЛЕНОГО СПЕКТРАЛЬНОГО РОЗШИРЕННЯ 未知
公开(公告)号：UA110768C2
公开(公告)日：2016-02-10
申请号：UAA201508058
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： HEDELIN PER , BISWAS ARIJIT , SCHUG MICHAEL , MELKOTE VINAY
IPC分类号： G10L21/034 , G03G7/00 , H03G3/24 , H04B1/64
摘要： Варіантиздійсненнявинаходуналежатьдоспособутасистемикомпандуваннядлязниженняшумукодуванняв аудіокодеку. Процеспакуваннязменшуєвихіднийдинамічнийдіапазонпервинногозвуковогосигналузадопомогоюпроцесупакування, якийділитьпервиннийзвуковийсигналнасукупністьсегментівз використаннямпевноїформивікна, обчислюєкоефіцієнтпідсиленняв широкійсмузічастоту частотнійобластіз використаннямзаснованогоненаенергіїсередньогозначеннядискретнихзначеньчастотноїобластіпервинногозвуковогосигналутазастосовуєокремікоефіцієнтипідсиленнядляпідсиленнясегментівз відноснонизькоюінтенсивністютапослабленнясегментівз відносновисокоюінтенсивністю. Потімупакованийзвуковийсигналрозпаковуєтьсяназад, посуті, довихідногодинамічногодіапазону, якийзастосовуєзворотнізначеннякоефіцієнтівпідсиленнядляпідсиленнясегментівз відносновисокоюінтенсивністютапослабленнясегментівз відноснонизькоюінтенсивністю. Банкфільтрів QMF застосовуєтьсядляаналізупервинногозвуковогосигналудляодержанняпредставленняв частотнійобласті.

4. 发明专利

CL2015002278A1 Sistema y metodo de compansion para reducir el ruido de cuantificacion usando extension espectral avanzada 未知
公开(公告)号：CL2015002278A1
公开(公告)日：2015-12-11
申请号：CL2015002278
申请日：2015-08-14
申请人： DOLBY INT AB , DOLBY LAB LICENSING CORP
发明人： SCHUG MICHAEL , MELKOTE VINAY , HEDELIN PER , BISWAS ARIJIT
IPC分类号： G03G7/00 , G10L21/034 , H03G3/24 , H04B1/64
摘要： LAS MODALIDADES SO REFIEREN A UN MÉTODO Y SISTEMA DO COMPANSION PARA REDUCIR EL RUIDO DE CODIFICACION EN UN CÓDEC DE AUDIO. UN PROCESO DE COMPRESIÓN REDUCE UN INTERVALO DINAMICO ORIGINAL DE UNA SEÑAL DE AUDIO INICIAL A TRAVÉS DE UN PROCESO DE COMPRESIÓN QUE DIVIDE LA SEÑAL DE AUDIO INICIAL EN MULTIPLES SEGMENTOS USANDO UNA FORMA DE VENTANA DEFINIDA, CALCULA UNA GANANCIA DE BANDA ANCHA EN EL DOMINIO DE FRECUENCIA USANDO UN PROMEDIO NO BASADO EN ENERGÍA DE MUESTRAS DO DOMINIO DE FRECUENCIA DE LA SEÑAL DE AUDIO INICIAL, Y APLICA VALORES DE GANANCIA INDIVIDUALES PARA AMPLIAR SEGMENTOS DE INTENSIDAD RELATIVAMENTE BAJA Y ATENUAR SEGMENTOS DE INTENSIDAD RELATIVAMENTE ALTA. LA SEÑAL DE AUDIO COMPRIMIDA SE EXTIENDE LUEGO NUEVAMENTE HASTA SUSTANCIALMENTE EL INTERVALO DINÁMICO ORIGINAL QUE APLICA VALORES DE GANANCIA INVERSOS PARA AMPLIAR SEGMENTOS DE INTENSIDAD RELATIVAMENTE ALTA Y ATENUAR SEGMENTOS DE INTENSIDAD RELATIVAMENTE BAJA. UNA BATERIA DE FILTROS QMF SE USA PARA ANALIZAR LA SEÑAL DE AUDIO INICIAL PARA OBTENER UNA REPRESENTACION DE DOMINIO DE FRECUENCIA.

5. 发明专利

SG11201506134XA COMPANDING APPARATUS AND METHOD TO REDUCE QUANTIZATION NOISE USING ADVANCED SPECTRAL EXTENSION 未知
公开(公告)号：SG11201506134XA
公开(公告)日：2015-09-29
申请号：SG11201506134X
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： HEDELIN PER , BISWAS ARIJIT , SCHUG MICHAEL , MELKOTE VINAY
IPC分类号： G03G7/00 , G10L21/034 , H03G3/24 , H04B1/64
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuate segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.

6. 发明专利

AU2014248232A1 Companding apparatus and method to reduce quantization noise using advanced spectral extension 未知
公开(公告)号：AU2014248232A1
公开(公告)日：2015-08-06
申请号：AU2014248232
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： HEDELIN PER , BISWAS ARIJIT , SCHUG MICHAEL , MELKOTE VINAY
IPC分类号： G10L21/034 , G03G7/00 , H03G3/24 , H04B1/64
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.

7. 发明专利

CA2900724A1 COMPANDING APPARATUS AND METHOD TO REDUCE QUANTIZATION NOISE USING ADVANCED SPECTRAL EXTENSION 未知
公开(公告)号：CA2900724A1
公开(公告)日：2014-10-09
申请号：CA2900724
申请日：2014-04-01
申请人： DOLBY LAB LICENSING CORP , DOLBY INT AB
发明人： HEDELIN PER , BISWAS ARIJIT , SCHUG MICHAEL , MELKOTE VINAY
IPC分类号： G10L21/034 , G03G7/00 , H03G3/24 , H04B1/64
摘要： Embodiments are directed to a companding method and system for reducing coding noise in an audio codec. A compression process reduces an original dynamic range of an initial audio signal through a compression process that divides the initial audio signal into a plurality of segments using a defined window shape, calculates a wideband gain in the frequency domain using a non-energy based average of frequency domain samples of the initial audio signal, and applies individual gain values to amplify segments of relatively low intensity and attenuate segments of relatively high intensity. The compressed audio signal is then expanded back to substantially the original dynamic range that applies inverse gain values to amplify segments of relatively high intensity and attenuating segments of relatively low intensity. A QMF filterbank is used to analyze the initial audio signal to obtain a frequency domain representation.

8. 发明申请

WO2014161991A2 AUDIO ENCODER AND DECODER 审中-公开
标题翻译：音频编码器和解码器
公开(公告)号：WO2014161991A2
公开(公告)日：2014-10-09
申请号：PCT/EP2014056851
申请日：2014-04-04
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , KLEJSA JANUSZ , HEDELIN PER
IPC分类号： G10L19/02
CPC分类号： G10L19/032 , G10L19/02 , G10L19/06
摘要： The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A transform-based speech encoder (100, 170) configured to encode a speech signal into a bitstream is described. The encoder (100, 170) comprises a framing unit (101) configured to receive a set(132, 332) of blocks; wherein the set (132, 332) of blocks comprises a plurality of sequential blocks (131) of transform coefficients; wherein the plurality of blocks (131) is indicative of samples of the speech signal; wherein a block (131) of transform coefficients comprises a plurality of transform coefficients for a corresponding plurality of frequency bins (301). Furthermore, the encoder (100, 170) comprises an envelope estimation unit (102) configured to determine a current envelope (133) based on the plurality of sequential blocks (131) of transform coefficients; wherein the current envelope (133) is indicative of a plurality of spectral energy values (303) for the corresponding plurality of frequency bins (301). In addition, the encoder (100, 170) comprises an envelope interpolation unit (104) configured to determine a plurality of interpolated envelopes (136) for the plurality of blocks (131) of transform coefficients, respectively, based on the current envelope (133); Furthermore, the encoder (100, 170) comprises a flattening unit (108) configured to determine a plurality of blocks (140) of flattened transform coefficients by flattening the corresponding plurality of blocks (131) of transform coefficients using the corresponding plurality of interpolated envelopes (136), respectively; wherein the bitstream is determined based on the plurality of blocks (140) of flattened transform coefficients.
摘要翻译：本文件涉及音频编码和解码系统（称为音频编解码器系统）。特别地，本文件涉及特别适合于语音编码/解码的基于变换的音频编解码器系统。描述了被配置为将语音信号编码为比特流的基于变换的语音编码器（100,170）。编码器（100,170）包括被配置为接收一组（132,332）块的成帧单元（101）其中所述块（132,332）包括变换系数的多个顺序块（131）; 其中所述多个块（131）指示所述语音信号的采样; 其中变换系数的块（131）包括用于对应的多个频率仓（301）的多个变换系数。此外，编码器（100,170）包括被配置为基于变换系数的多个顺序块（131）确定当前包络（133）的包络估计单元（102）其中所述电流包络（133）指示对应的多个频率仓（301）的多个频谱能量值（303）。另外，编码器（100,170）包括一个包络插值单元（104），被配置为基于当前的信封（133）确定多个块（131）的变换系数的多个内插包络（136））; 此外，编码器（100,170）包括平坦化单元（108），其被配置为通过使用对应的多个内插信封来平坦化变换系数的相应多个块（131）来确定平坦化变换系数的多个块（140）（136）; 其中，基于所述平坦化变换系数的所述多个块（140）来确定所述比特流。

9. 发明申请

WO2014161994A3 ADVANCED QUANTIZER 审中-公开
标题翻译：高级量器
公开(公告)号：WO2014161994A3
公开(公告)日：2014-11-27
申请号：PCT/EP2014056855
申请日：2014-04-04
申请人： DOLBY INT AB
发明人： KLEJSA JANUSZ , VILLEMOES LARS , HEDELIN PER
IPC分类号： G10L19/035
CPC分类号： G10L19/035 , G10L19/005 , G10L19/028 , G10L19/20
摘要： The present document relates an audio encoding and decoding system (referred to as an audio codec system). In particular, the present document relates to a transform-based audio codec system which is particularly well suited for voice encoding/decoding. A quantization unit (112) configured to quantize a first coefficient of a block (141) of coefficients is described. The block (141) of coefficients comprises a plurality of coefficients for a plurality of corresponding frequency bins (301). The quantization unit (112) is configured to provide a set (326, 327) of quantizers. The set (326, 327) of quantizers comprises a plurality of different quantizers (321, 322, 323) associated with a plurality of different signal-to-noise ratios, referred to as SNR, respectively. The plurality of different quantizers (321, 322, 323) includes a noise-filling quantizer (321); one or more dithered quantizers (322); and one or more un-dithered quantizers (323). The quantization unit (112) is further configured to determine an SNRindication indicative of a SNR attributed to the first coefficient, and to select a first quantizer from the set (326, 327) of quantizers, based on the SNR indication. In addition, the quantization unit (112) is configured to quantize the first coefficient using the first quantizer.
摘要翻译：本文件涉及音频编码和解码系统（称为音频编解码器系统）。特别地，本文件涉及特别适合于语音编码/解码的基于变换的音频编解码器系统。描述被配置为量化系数的块（141）的第一系数的量化单元（112）。系数块（141）包括用于多个相应频率仓（301）的多个系数。量化单元（112）被配置为提供量化器的集合（326,327）。量化器的集合（326,327）分别包括与多个不同的信噪比相关联的多个不同的量化器（321,322,323），分别称为SNR。多个不同的量化器（321,322,323）包括噪声填充量化器（321）; 一个或多个抖动量化器（322）; 和一个或多个未抖动量化器（323）。量化单元（112）还被配置为确定指示归因于第一系数的SNR的SNR指示，并且基于SNR指示从量化器的集合（326,327）中选择第一量化器。此外，量化单元（112）被配置为使用第一量化器来量化第一系数。

10. 发明专利

PL3598445T3 TRANSPOZYCJA HARMONICZNYCH ROZSZERZONA O ILOCZYN WEKTOROWY 未知
公开(公告)号：PL3598445T3
公开(公告)日：2021-12-27
申请号：PL19171997
申请日：2010-01-15
申请人： DOLBY INT AB
发明人： VILLEMOES LARS , HEDELIN PER
IPC分类号： G10L21/0388 , G10L25/90

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式