Energy dependent quantization for efficient coding of spatial audio parameters
    4.
    发明授权
    Energy dependent quantization for efficient coding of spatial audio parameters 有权
    能量相关量化用于空间音频参数的有效编码

    公开(公告)号:US08054981B2

    公开(公告)日:2011-11-08

    申请号:US11406631

    申请日:2006-04-19

    IPC分类号: H04R5/00

    CPC分类号: G10L19/03 G10L19/008

    摘要: Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more efficiently using a quantization rule that is generated based on a relation of an energy measure of the channel or the pair of channels and an energy measure of the multi-channel signal. With generation of the quantization rule taking into account a psycho acoustic approach, the size of an encoded representation of the multi-channel signal can be decreased by coarser quantization without significantly disturbing the perceptual quality of the multi-channel signal when reconstructed from the encoded representation.

    摘要翻译: 参数是用于信道或一对信道特性的度量,其中参数是相对于多信道信号的另一信道的信道或信道对的特性的度量可以被更多地量化 有效地使用基于信道的能量测量或信道对的关系产生的量化规则和多信道信号的能量测量。 考虑到心理声学方法的生成量化规则,可以通过较粗略的量化来减少多信道信号的编码表示的大小,而不会在从编码表示重建时显着干扰多信道信号的感知质量 。

    Stereo Compatible Multi-Channel Audio Coding
    6.
    发明申请
    Stereo Compatible Multi-Channel Audio Coding 有权
    立体声兼容多声道音频编码

    公开(公告)号:US20110211703A1

    公开(公告)日:2011-09-01

    申请号:US13040057

    申请日:2011-03-03

    IPC分类号: H04R5/00

    CPC分类号: G10L19/008

    摘要: A parametric representation of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner is used to generate the parametric representation by combining a one or more spatial parameters and a stereo parameter resulting in a parametric representation having a decoder usable stereo parameter and an information on the one or more spatial parameters that represents, together with the decoder usable stereo parameter, the one or more spatial parameters.

    摘要翻译: 当使用参数组合器时,具有适合于与单声道下混信号一起使用以计算多声道音频信号的重建的参数的多声道音频信号的参数表示可以以立体声向后兼容的方式有效地导出 通过组合一个或多个空间参数和立体声参数来产生参数表示,该立体参数导致具有解码器可用立体声参数的参数表示以及与解码器可用立体参数一起表示的一个或多个空间参数的信息, 一个或多个空间参数。

    Method for representing multi-channel audio signals
    7.
    发明授权
    Method for representing multi-channel audio signals 有权
    表示多声道音频信号的方法

    公开(公告)号:US07986789B2

    公开(公告)日:2011-07-26

    申请号:US11549963

    申请日:2006-10-16

    IPC分类号: H04R5/00 G06F17/00

    摘要: A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter, a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second balance parameter, or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair has two channels, which are different from two channels of a second channel pair. Furthermore, each channel of the two channel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels. For multi-channel reconstruction purposes, the parameters are used in addition to down-mixing information to generate a selectable number of output channels in a scalable fashion.

    摘要翻译: 具有至少三个原始信道的多信道输入信号由多信道信号的参数表示来表示。 在第二通道对之间的第一通道对和第二平衡参数之间的第一平衡参数,第一相干参数或第一通道间时间差或第二相干参数或第二通道间差参数是 计算。 这组参数是原始信号的参数表示。 第一通道对具有两个通道,它们与第二通道对的两个通道不同。 此外,两个信道对的每个信道是原始信道之一或原始信道的加权组合,并且第一信道对和第二信道对包括关于三个原始信道的信息。 对于多通道重建的目的,除了降混信息之外还使用这些参数,以便以可缩放的方式生成可选数量的输出通道。

    Method and apparatus for generating a number of output audio channels
    8.
    发明授权
    Method and apparatus for generating a number of output audio channels 有权
    用于产生多个输出音频通道的方法和装置

    公开(公告)号:US07966191B2

    公开(公告)日:2011-06-21

    申请号:US11995538

    申请日:2006-07-07

    IPC分类号: G10L19/00

    CPC分类号: G10L19/008 H04S2420/03

    摘要: 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.

    摘要翻译: 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产生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。

    Multi-channel hierarchical audio coding with compact side information
    9.
    发明授权
    Multi-channel hierarchical audio coding with compact side information 有权
    具有紧凑侧面信息的多通道分层音频编码

    公开(公告)号:US07961890B2

    公开(公告)日:2011-06-14

    申请号:US11314711

    申请日:2005-12-21

    IPC分类号: H04R5/00

    摘要: A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

    摘要翻译: 多通道音频信号的参数化表示利用紧凑的侧信息来描述音频信号的空间属性,当描述第一和第二信道之间的相干性的相干信息仅在信道对的分级编码处理中导出时 包括仅具有相对于收听位置的左侧的信息的第一频道,并且包括仅具有相对于收听位置的右侧的信息的第二频道。 如在分层处理中,音频信号的多个音频通道被迭代地下混合成单声道,可以从仅涉及携带描述多声道音频信号的空间属性所需的信息的信道对的编码步骤中选择相关参数 。