会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 13. 发明授权
    • Method and apparatus for processing two or more initially decoded audio signals received or replayed from a bitstream
    • 用于处理从比特流接收或重放的两个或更多个初始解码的音频信号的方法和装置
    • US08082050B2
    • 2011-12-20
    • US10536539
    • 2003-11-24
    • Jürgen SchmidtJens SpilleErnst F. SchröderJohannes Böhm
    • Jürgen SchmidtJens SpilleErnst F. SchröderJohannes Böhm
    • G06F17/00
    • H04S3/008H04S1/007
    • In the MPEG-4 standard ISO/IEC 14496:2001 several audio objects that can be coded with different MPEG-4 format coding types can together form a composed audio system representing a single soundtrack from the several audio substreams. In a receiver the multiple audio objects are decoded separately, but not directly played back to a listener. Instead, transmitted instructions for mixdown are used to prepare a single soundtrack. Mixdown conflicts can occur in case the audio signals to be combined have different channel numbers or configurations. According to the invention an additional audio channel configuration node is used that tags the correct channel configuration information items to the decoded audio data streams to be presented. The invention enables the content provider to set the channel configuration in such a way that the presenter at receiver side can produce a correct channel presentation under all circumstances. An escape code value in the channel configuration data facilitates correct handling of not yet defined channel combinations.
    • 在MPEG-4标准ISO / IEC 14496:2001中,可以用不同MPEG-4格式编码类型编码的几个音频对象可以一起形成代表来自多个音频子流的单个音轨的组合音频系统。 在接收机中,多个音频对象被单独解码,但不直接回放到收听者。 相反,用于混音的传输指令用于准备单个音轨。 要组合的音频信号具有不同的通道号或配置时,可能会发生混频冲突。 根据本发明,使用附加的音频通道配置节点,其将正确的信道配置信息项标记到要呈现的解码音频数据流。 本发明使得内容提供商能够以这样一种方式设置频道配置,使得接收机侧的演示者可以在任何情况下产生正确的频道呈现。 通道配置数据中的转义码值有助于正确处理尚未定义的通道组合。
    • 16. 发明授权
    • Method for coding and decoding the wideness of a sound source in an audio scene
    • 用于对音频场景中的声源的宽度进行编码和解码的方法
    • US08437868B2
    • 2013-05-07
    • US10530881
    • 2003-10-10
    • Jens SpilleJürgen Schmidt
    • Jens SpilleJürgen Schmidt
    • G06F17/00H03G3/00
    • G10L19/00H04S2420/03
    • A parametric description describing the wideness of a non-point sound source is generated and linked with the audio signal of said sound source. A presentation of said non-point sound source by multiple decorrelated point sound sources at different positions is defined. Different diffuseness algorithms are applied for ensuring a decorrelation of the respective outputs. According to a further embodiment primitive shapes of several distributed uncorellated sound sources are defined, e.g. a box, a sphere and a cylinder. The width of a sound source can also be defined by an opening-angle relative to the listener. Furthermore, the primitive shapes can be combined to do more complex shapes.
    • 描述描述非点声源的宽度的参数描述被生成并与所述声源的音频信号相关联。 定义了在不同位置处由多个相关点声源引起的所述非点声源的呈现。 应用不同的扩散算法来确保各个输出的去相关。 根据另一实施例,定义了几个分布的未重新声音的声源的原始形状,例如, 一个盒子,一个球体和一个圆柱体。 声源的宽度也可以通过相对于收听者的开角来定义。 此外,原始形状可以组合以做更复杂的形状。
    • 17. 发明授权
    • Method and an apparatus for sampling-rate conversion of audio signals
    • 用于对音频信号进行采样率转换的方法和装置
    • US06681209B1
    • 2004-01-20
    • US09309704
    • 1999-05-11
    • Jürgen SchmidtErnst F. Schröder
    • Jürgen SchmidtErnst F. Schröder
    • G10L1900
    • H03H17/0621
    • Generally, performing sampling-rate conversion from a higher sampling frequency fs1 to a lower sampling frequency fs2 results in aliasing. It is known to use a low-pass filter, known as anti-alias filter, for avoiding this alias distortion. Its effect is to remove spectral contents above fs2/2 from the digital signal. According to the invention these signal parts are suppressed at spectral decoding resulting in a bandwidth of the signal to be re-sampled which is less than half of the second sampling frequency fs2. This can be done for MPEG encoded audio signals by limiting the decoding to a certain number of subbands, for DOLBY AC-3 encoded audio signals by setting certain spectral lines to zero at decoding. The inventive method not only totally removes the processing power needed for calculating an anti-alias filter, but also limits the decoding work needed.
    • 通常,从较高采样频率fs1到较低采样频率fs2执行采样率转换导致混叠。 已知使用称为抗混叠滤波器的低通滤波器来避免这种混叠失真。 其效果是从数字信号中去除fs2 / 2以上的频谱内容。 根据本发明,这些信号部分在频谱解码时被抑制,导致待重新采样的信号的带宽小于第二采样频率fs2的一半。 这可以通过将解码限制到一定数量的子带,对于DOLBY AC-3编码的音频信号,通过在解码时将某些谱线设置为零来对MPEG编码的音频信号进行。 本发明的方法不仅完全消除了计算抗混叠滤波器所需的处理能力,而且限制了所需的解码工作。
    • 20. 发明授权
    • Method for describing the composition of audio signals
    • 描述音频信号的组成的方法
    • US09002716B2
    • 2015-04-07
    • US10536739
    • 2003-11-28
    • Jens SpilleJürgen Schmidt
    • Jens SpilleJürgen Schmidt
    • H04S3/00G10L19/008
    • H04S3/00H04S2420/03
    • Method for describing the composition of audio signals, which are encoded as separate audio objects. The arrangement and the processing of the audio objects in a sound scene is described by nodes arranged hierarchically in a scene description. A node specified only for spatialization on a 2D screen using a 2D vector describes a 3D position of an audio object using said 2D vector and a 1D value describing the depth of said audio object. In a further embodiment a mapping of the coordinates is performed, which enables the movement of a graphical object in the screen plane to be mapped to a movement of an audio object in the depth perpendicular to said screen plane.
    • 用于描述被编码为单独的音频对象的音频信号的组成的方法。 声音场景中的音频对象的布置和处理由在场景描述中分层布置的节点来描述。 使用2D矢量仅在2D屏幕上指定用于空间化的节点使用所述2D矢量描述音频对象的3D位置和描述所述音频对象的深度的1D值。 在另一实施例中,执行坐标的映射,这使得能够在屏幕平面中移动图形对象以映射到垂直于所述屏幕平面的深度的音频对象的移动。