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1.发明授权公开(公告)号：US08605911B2
公开(公告)日：2013-12-10
申请号：US12610186
申请日：2009-10-30
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
CPC classification number: G10L19/008 , G10L19/265 , G10L21/038 , G10L25/21
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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2.发明授权公开(公告)号：US08243936B2
公开(公告)日：2012-08-14
申请号：US12610193
申请日：2009-10-30
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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公开(公告)号：US07483758B2
公开(公告)日：2009-01-27
申请号：US10296562
申请日：2001-05-23
Applicant: Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjorling
Inventor： Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjorling
IPC: G06F17/00
CPC classification number: G10L19/0208 , G10L19/0017 , G10L19/0204 , G10L19/26 , G10L19/265 , G10L21/038
Abstract: The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems, and offers significantly reduced computational complexity. This is accomplished by means of frequency translation or folding in the subband domain, preferably integrated with spectral envelope adjustment in the same domain. The concept of dissonance guard-band filtering is further presented. The proposed invention offers a low-complexity, intermediate quality HFR method useful in speech and natural audio coding applications.
Abstract translation: 本发明涉及使用频率转换或折叠或其组合来改进高频重建（HFR）技术的新方法和装置。 所提出的发明适用于音频源编码系统，并提供显着降低的计算复杂度。 这通过在子带域中的频率转换或折叠来实现，优选地与同一域中的频谱包络调整集成。 进一步提出了不一致保卫带滤波的概念。 所提出的发明提供了一种在语音和自然音频编码应用中有用的低复杂度，中等质量的HFR方法。
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4.发明申请公开(公告)号：US20060029231A1
公开(公告)日：2006-02-09
申请号：US11237174
申请日：2005-09-27
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
IPC: H04R5/00
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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5.发明申请公开(公告)号：US20060023895A1
公开(公告)日：2006-02-02
申请号：US11237127
申请日：2005-09-27
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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Patent Agency Ranking
公开(公告)号：US08543232B2
公开(公告)日：2013-09-24
申请号：US13460797
申请日：2012-04-30
Applicant: Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjoerling
Inventor： Lars Liljeryd , Per Ekstrand , Fredrik Henn , Kristofer Kjoerling
IPC: G06F17/00
CPC classification number: G10L19/0208 , G10L19/0017 , G10L19/0204 , G10L19/26 , G10L19/265 , G10L21/038
Abstract: The present invention relates to a new method and apparatus for improvement of High Frequency Reconstruction (HFR) techniques using frequency translation or folding or a combination thereof. The proposed invention is applicable to audio source coding systems. This is accomplished by means of frequency translation in the frequency domain with spectral envelope adjustment in the same domain. The proposed invention offers a low-complexity HFR method useful in speech and natural audio coding applications.
Abstract translation: 本发明涉及使用频率转换或折叠或其组合来改进高频重建（HFR）技术的新方法和装置。 本发明适用于音频源编码系统。 这是通过在频域中的频率转换并且在相同的域中进行频谱包络调整来实现的。 所提出的发明提供了一种在语音和自然音频编码应用中有用的低复杂度HFR方法。
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7.发明授权Efficient and scalable parametric stereo coding for low bitrate audio coding applications 有权低比特率音频编码应用的高效可扩展的参数立体声编码公开(公告)号：US08116460B2
公开(公告)日：2012-02-14
申请号：US11238982
申请日：2005-09-28
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
Abstract translation: 本发明提供对现有技术的音频编解码器的改进，其通过对接收到的单声道信号的后处理产生立体幻象。 这些改进通过提取在编码器侧描述参数的立体图像来实现，其被传输并随后用于在解码器侧对立体声发生器的控制。 此外，本发明通过使用新形式的参数立体声编码来弥合简单伪立体声方法和现有的真实立体声编码方法之间的差距。 引入立体声平衡参数，其实现更高级的立体声模式，并且还构成了频谱包络的立体编码的新方法的基础，在采用引导HFR（高频重建）的系统中特别有用。 作为特殊情况，描述了这种立体声编码方案在可扩展的基于HFR的编解码器中的应用。
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8.发明授权公开(公告)号：US08081763B2
公开(公告)日：2011-12-20
申请号：US12496926
申请日：2009-07-02
Applicant: Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
Inventor： Fredrik Henn , Kristofer Kjorling , Lars Liljeryd , Jonas Roden , Jonas Engdegard
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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9.发明申请公开(公告)号：US20100046762A1
公开(公告)日：2010-02-25
申请号：US12610186
申请日：2009-10-30
Applicant: Fredrik HENN , Kristofer KJORLING , Lars LILJERYD , Jonas RODEN , Jonas ENGDEGARD
Inventor： Fredrik HENN , Kristofer KJORLING , Lars LILJERYD , Jonas RODEN , Jonas ENGDEGARD
CPC classification number: G10L19/008 , G10L19/265 , G10L21/038 , G10L25/21
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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10.发明申请EFFICIENT AND SCALABLE PARAMETRIC STEREO CODING FOR LOW BITRATE AUDIO CODING APPLICATIONS 有权低成本音频编码应用的高效和可扩展参数立体声编码公开(公告)号：US20100046761A1
公开(公告)日：2010-02-25
申请号：US12610193
申请日：2009-10-30
Applicant: Fredrik HENN , Kristofer KJORLING , Lars LILJERYD , Jonas RODEN , Jonas ENGDEGARD
Inventor： Fredrik HENN , Kristofer KJORLING , Lars LILJERYD , Jonas RODEN , Jonas ENGDEGARD
IPC: H04R5/00
CPC classification number: G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
Abstract: The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
Abstract translation: 本发明提供对现有技术的音频编解码器的改进，其通过对接收到的单声道信号的后处理产生立体幻象。 这些改进通过提取在编码器侧描述参数的立体图像来实现，其被传输并随后用于在解码器侧对立体声发生器的控制。 此外，本发明通过使用新形式的参数立体声编码来弥合简单伪立体声方法和现有的真实立体声编码方法之间的差距。 引入立体声平衡参数，其实现更高级的立体声模式，并且还构成了频谱包络的立体编码的新方法的基础，在采用引导HFR（高频重建）的系统中特别有用。 作为特殊情况，描述了这种立体声编码方案在可扩展的基于HFR的编解码器中的应用。
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