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    Audio Encoding and Decoding
    4.
    发明申请
    Audio Encoding and Decoding 有权
    音频编码和解码

    公开(公告)号：US20080255856A1

    公开(公告)日：2008-10-16

    申请号：US11995538

    申请日：2006-07-07

    Applicant: Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjorling ,  Karl Jonas Roden

    Inventor： Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjorling ,  Karl Jonas Roden

    IPC: G10L21/00

    CPC classification number: G10L19/008 ,  H04S2420/03

    Abstract: An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.

    Abstract translation: 音频编码器（109）具有分层编码结构，并且生成包括一个或多个音频信道以及参数音频编码数据的数据流。 编码器（109）包括将解码器树结构数据插入到数据流中的编码结构处理器（305）。 解码器树结构数据包括指示分层解码器结构的分级层处的音频信道的信道分离特性的至少一个数据值，并且可以具体指定要由解码器A应用的解码器树结构。解码器（115）包括 接收数据流的接收机（401）和用于响应于解码器树结构数据生成分层解码器结构的解码器结构处理器（405）。 解码处理器（403）然后使用分层解码器结构从数据流生成输出音频通道。

    Envelope shaping of decorrelated signals
    5.
    发明申请
    Envelope shaping of decorrelated signals 有权
    去相关信号的信封整形

    公开(公告)号：US20060239473A1

    公开(公告)日：2006-10-26

    申请号：US11402519

    申请日：2006-04-12

    Applicant: Kristofer Kjorling ,  Jurgen Herre ,  Sascha Disch ,  Lars Villemoes

    Inventor： Kristofer Kjorling ,  Jurgen Herre ,  Sascha Disch ,  Lars Villemoes

    IPC: H03G5/00

    CPC classification number: H04S7/307 ,  G10L19/008 ,  G10L19/02 ,  G10L19/26 ,  H04S3/00 ,  H04S5/005 ,  H04S2420/03

    Abstract: The envelope of a decorrelated signal derived from an original signal can be shaped without introducing additional distortion, when a spectral flattener is used to spectrally flatten the spectrum of the decorrelated signal and the original signal prior to using the flattened spectra for deriving a gain factor describing the energy distribution between the flattened spectra, and when the so derived gain factor is used by an envelope shaper to timely shape the envelope of the decorrelated signal.

    Abstract translation: 当原始信号得到的去相关信号的包络线可以被成形，而不引入额外的失真，当使用光谱平滑器在光谱平坦化去相关信号的频谱和原始信号之前，在使用平坦的光谱以得出描述的增益因子之前 平坦化光谱之间的能量分布，以及当衍生的增益因子被信封整形器用于及时地形成去相关信号的包络时。

    Efficient and scalable parametric stereo coding for low bitrate audio coding applications
    8.
    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

    IPC: H04R5/00 ,  G10L19/00

    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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