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    • 1. 发明申请
    • SCREEN RELATED ADAPTATION OF HOA CONTENT
    • 屏幕相关适应HOA内容
    • WO2016057935A1
    • 2016-04-14
    • PCT/US2015/054964
    • 2015-10-09
    • QUALCOMM INCORPORATED
    • PETERS, Nils GüntherMORRELL, Martin JamesSEN, Dipanjan
    • H04S7/00
    • G10L19/008G10L19/032H04S3/008H04S7/301H04S7/302H04S2420/11
    • This disclosure describes techniques for coding of higher-order ambisonics audio data comprising at least one higher-order ambisonic (HOA) coefficient corresponding to a spherical harmonic basis function having an order greater than one. This disclosure describes techniques for adjusting HOA soundfields to potentially improve spatial alignment of the acoustic elements to the visual component in a mixed audio/video reproduction scenario. In one example, a device for rendering an HOA audio signal includes one or more processors configured to render the HOA audio signal over one or more speakers based on one or more field of view (FOV) parameters of a reference screen and one or more FOV parameters of a viewing window.
    • 本公开描述了用于编码包括与具有大于1的阶数的球面谐波基函数相对应的至少一个高阶环比(HOA)系数的高阶有源音频数据的技术。 本公开描述了用于调整HOA声场以在混合音频/视频再现场景中潜在地改善声学元件与视觉分量的空间对准的技术。 在一个示例中,用于呈现HOA音频信号的设备包括一个或多个处理器,其被配置为基于参考屏幕的一个或多个视场(FOV)参数和一个或多个FOV来呈现一个或多个扬声器上的HOA音频信号 查看窗口的参数。
    • 2. 发明申请
    • SYSTEMS AND METHODS FOR COMPRESSING A DIGITAL SIGNAL
    • 用于压缩数字信号的系统和方法
    • WO2015200267A3
    • 2016-02-11
    • PCT/US2015037101
    • 2015-06-23
    • CIRRUS LOGIC INC
    • CHESNEY BRIAN PARKER
    • H03M3/00H03M7/30
    • G10L19/032G10L19/005G10L19/04G10L25/78H03M3/424H03M3/428H03M3/458H03M3/466H03M3/468H03M5/04
    • A system may include a delta-sigma analog-to-digital converter and a digital compression circuit. The delta-sigma analog-to-digital converter may include a loop filter having a loop filter input configured to receive an input signal and generate an intermediate signal responsive to the input signal, a multi-bit quantizer configured to quantize the intermediate signal into an uncompressed digital output signal, and a feedback digital-to-analog converter having a feedback output configured to generate a feedback output signal responsive to the uncompressed digital output signal in order to combine the input signal and the feedback output signal at the loop filter input. The digital compression circuit may be configured to receive the uncompressed digital output signal and compress the uncompressed digital output signal into a compressed digital output signal having fewer quantization levels than that of the uncompressed digital output signal.
    • 系统可以包括Δ-Σ模数转换器和数字压缩电路。 所述德耳塔西格玛模数转换器可以包括环路滤波器,所述环路滤波器具有环路滤波器输入,所述环路滤波器输入被配置为接收输入信号并且响应于所述输入信号而生成中间信号;多比特量化器,其被配置为将所述中间信号量化成 未压缩的数字输出信号以及具有反馈输出的反馈数模转换器,所述反馈输出被配置为响应于所述未压缩的数字输出信号而生成反馈输出信号,以便在所述环路滤波器输入处组合所述输入信号和所述反馈输出信号。 数字压缩电路可以被配置为接收未压缩的数字输出信号并且将未压缩的数字输出信号压缩成具有比未压缩的数字输出信号的量化级更少的量化级的压缩的数字输出信号。
    • 3. 发明申请
    • SYSTEMS AND METHODS FOR COMPRESSING A DIGITAL SIGNAL
    • 用于压缩数字信号的系统和方法
    • WO2015200267A2
    • 2015-12-30
    • PCT/US2015/037101
    • 2015-06-23
    • CIRRUS LOGIC, INC.
    • CHESNEY, Brian Parker
    • H03M3/00
    • G10L19/032G10L19/005G10L19/04G10L25/78H03M3/424H03M3/428H03M3/458H03M3/466H03M3/468H03M5/04
    • A system may include a delta-sigma analog-to-digital converter and a digital compression circuit. The delta-sigma analog-to-digital converter may include a loop filter having a loop filter input configured to receive an input signal and generate an intermediate signal responsive to the input signal, a multi-bit quantizer configured to quantize the intermediate signal into an uncompressed digital output signal, and a feedback digital-to-analog converter having a feedback output configured to generate a feedback output signal responsive to the uncompressed digital output signal in order to combine the input signal and the feedback output signal at the loop filter input. The digital compression circuit may be configured to receive the uncompressed digital output signal and compress the uncompressed digital output signal into a compressed digital output signal having fewer quantization levels than that of the uncompressed digital output signal.
    • 系统可以包括Δ-Σ模数转换器和数字压缩电路。 Δ-Σ模数转换器可以包括具有环路滤波器输入的环路滤波器,该环路滤波器输入被配置为接收输入信号并响应于输入信号产生中间信号;多位量化器,被配置为将中间信号量化为 未压缩的数字输出信号以及具有反馈输出的反馈数模转换器,该反馈输出被配置为响应于未压缩的数字输出信号产生反馈输出信号,以便在环路滤波器输入处组合输入信号和反馈输出信号。 数字压缩电路可以被配置为接收未压缩的数字输出信号并将未压缩的数字输出信号压缩成具有比未压缩的数字输出信号的量化级的量化级的压缩数字输出信号。
    • 6. 发明申请
    • ADAPTIVE DIFFUSE SIGNAL GENERATION IN AN UPMIXER
    • 自适应信号发生在自适应信号中
    • WO2015050785A1
    • 2015-04-09
    • PCT/US2014/057671
    • 2014-09-26
    • DOLBY LABORATORIES LICENSING CORPORATION
    • SEEFELDT, Alan J.VINTON, Mark S.BROWN, C. Phillip
    • H04S7/00
    • H04S5/005G10L19/008G10L19/032H04S7/30H04S2400/01H04S2400/11
    • An audio processing system, such as an upmixer, may be capable of separating diffuse and non-diffuse portions of N input audio signals. The upmixer may be capable of detecting instances of transient audio signal conditions. During instances of transient audio signal conditions, the upmixer may be capable of adding a signal-adaptive control to a diffuse signal expansion process in which M audio signals are output. The upmixer may vary the diffuse signal expansion process over time such that during instances of transient audio signal conditions the diffuse portions of audio signals may be distributed substantially only to output channels spatially close to the input channels. During instances of non-transient audio signal conditions, the diffuse portions of audio signals may be distributed in a substantially uniform manner.
    • 诸如上混频器的音频处理系统可以能够分离N个输入音频信号的漫射和非漫射部分。 上混频器可能能够检测瞬态音频信号状况的实例。 在瞬态音频信号条件的情况下,上混频器可能能够将信号自适应控制添加到其中输出M个音频信号的扩散信号扩展处理。 上升混频器可以随时间改变扩散信号扩展过程,使得在瞬态音频信号条件的情况下,音频信号的扩散部分可以基本上仅分布到空间上靠近输入信道的输出信道。 在非瞬态音频信号条件的情况下,音频信号的扩散部分可以以基本均匀的方式分布。
    • 9. 发明申请
    • BITSTREAM SYNTAX FOR SPATIAL VOICE CODING
    • 用于空间语音编码的BITSTREAM语法
    • WO2014210284A1
    • 2014-12-31
    • PCT/US2014/044295
    • 2014-06-26
    • DOLBY LABORATORIES LICENSING CORPORATIONDOLBY INTERNATIONAL AB
    • KLEJSA, JanuszSAMUELSSON, JonasPURNHAGEN, HeikoDICKINS, Glenn N.
    • G10L19/032G10L19/008
    • G10L19/008G10L19/002G10L19/0204G10L19/0212G10L19/032G10L19/035
    • An encoding system (100) encodes a first (E1) and further (E2, E3) audio signals as a layered bitstream (B), wherein a quantizer for each frequency band of each signal is selected using a rate allocation rule based on signal-specific rate allocation data, a spectral envelope of the signal and a reference level (EnvE1Max), which is determined based on the spectral envelope of the first signal and is not necessarily included in the bitstream. Further disclosed is a decoding system for reconstructing the audio signals based on the bitstream. In embodiments, the bitstream has a basic layer (B E1 ), which contains data that enable decoding of the first audio signal, and a spatial layer (B spatial ) facilitating decoding of the further audio signal(s). In embodiments, the encoding system prepares the bitstream subject to a basic-layer bitrate constraint and a total bitrate constraint.
    • 编码系统(100)将第一(E1)和另外(E2,E3)音频信号编码为分层比特流(B),其中使用基于信号的比特率的速率分配规则来选择每个信号的每个频带的量化器, 特定速率分配数据,信号的频谱包络和基于第一信号的频谱包络确定并且不一定包括在比特流中的参考电平(EnvE1Max)。 还公开了一种用于基于比特流重建音频信号的解码系统。 在实施例中,比特流具有包含能够对第一音频信号进行解码的数据的基本层(BE1)以及便于对其它音频信号进行解码的空间层(B空间)。 在实施例中,编码系统根据基本层比特率约束和总比特率约束准备比特流。
    • 10. 发明申请
    • AUDIO ENCODING AND DECODING WITH CONDITIONAL QUANTIZERS
    • 音频编码和解码与条件量子
    • WO2013162679A1
    • 2013-10-31
    • PCT/US2013/026481
    • 2013-02-15
    • DOLBY LABORATORIES LICENSING CORPORATION
    • MELKOTE, VinayROBINSON, Charles Q.
    • G10L19/032H03M7/24H04S3/00
    • G10L19/035G10L19/032H03M7/24H04S3/008
    • Some methods may involve receiving a frame of encoded audio data that includes transform coefficient data. The transform coefficient data may include exponent data and mantissa data. The mantissa data may include mantissa values that were encoded with uniform or non-uniform boundaries of quantization intervals. The mantissa values may be reconstructed based, at least in part, on exponent profile data. Based on the exponent profile data, statistics regarding the pre-quantization mantissas values may be inferred. The exponent profile data may include exponent differential data. Some such exponent differential data may be exponent difference pairs, though more than two exponent differential data points may be evaluated in alternative methods. At each frequency bin, mantissa value reconstruction may be conditioned on the exponent differential data, e.g., on the exponent difference pairs.
    • 一些方法可以涉及接收包括变换系数数据的编码音频数据的帧。 变换系数数据可以包括指数数据和尾数数据。 尾数数据可以包括用均匀或非均匀的量化间隔边界编码的尾数值。 可以至少部分地基于指数轮廓数据重建尾数值。 基于指数分布数据,可以推断关于预量化尾数值的统计。 指数分布数据可以包括指数差分数据。 一些这样的指数差分数据可以是指数差分对,尽管可以在替代方法中评估两个以上的指数差分数据点。 在每个频率仓上,尾数值重构可以根据指数差分数据进行调节,例如在指数差对上。