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    AUDIO DECODER FOR INTERLEAVING SIGNALS
    4.
    发明申请
    AUDIO DECODER FOR INTERLEAVING SIGNALS 审中-公开

    公开(公告)号：US20200098381A1

    公开(公告)日：2020-03-26

    申请号：US16593830

    申请日：2019-10-04

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Kristofer KJOERLING ,  Heiko PURNHAGEN ,  Harald MUNDT ,  Karl Jonas ROEDEN ,  Leif SEHLSTROM

    IPC: G10L19/20 ,  G10L19/008 ,  G10L25/18 ,  H04S3/00 ,  G10L19/02 ,  G10L19/16

    Abstract: A method for decoding an encoded audio bitstream in an audio processing system is disclosed. The method includes extracting from the encoded audio bitstream a first waveform-coded signal comprising spectral coefficients corresponding to frequencies up to a first cross-over frequency for a time frame and performing parametric decoding at a second cross-over frequency for the time frame to generate a reconstructed signal. The second cross-over frequency is above the first cross-over frequency and the parametric decoding uses reconstruction parameters derived from the encoded audio bitstream to generate the reconstructed signal. The method also includes extracting from the encoded audio bitstream a second waveform-coded signal comprising spectral coefficients corresponding to a subset of frequencies above the first cross-over frequency for the time frame and interleaving the second waveform-coded signal with the reconstructed signal to produce an interleaved signal for the time frame.

    AUDIO ENCODER AND DECODER
    6.
    发明申请
    AUDIO ENCODER AND DECODER 有权
    音频编码器和解码器

    公开(公告)号：US20160055864A1

    公开(公告)日：2016-02-25

    申请号：US14779170

    申请日：2014-04-04

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Heiko PURNHAGEN ,  Kristopher KJOERLING ,  Alexander GROESCHEL ,  Jens POPP ,  Karl Jonas ROEDEN

    IPC: G10L21/055 ,  H04N21/43 ,  H04N21/439 ,  G10L19/16 ,  H04N21/2368

    CPC classification number: G10L21/055 ,  G10L19/022 ,  G10L19/167 ,  G10L19/22 ,  H04N21/2368 ,  H04N21/4302 ,  H04N21/4398

    Abstract: An audio processing system (100) accepts an audio bitstream having one of a plurality of predefined audio frame rates. The system comprises a front-end component (110), which receives a variable number of quantized spectral components, corresponding to one audio frame in any of the predefined audio frame rates, and performs an inverse quantization according to predetermined, frequency-dependent quantization levels. The front-end component may be agnostic of the audio frame rate. The audio processing system further comprises a frequency-domain processing stage (120) and a sample rate converter (130), which provide a reconstructed audio signal sampled at a target sampling frequency independent of the audio frame rate. By its frame-rate adaptability, the system can be configured to operate frame-synchronously in parallel with a video processing system that accepts plural video frame rates.

    Abstract translation: 音频处理系统（100）接受具有多个预定音频帧速率之一的音频比特流。 该系统包括前端组件（110），其接收对应于任何预定音频帧速率中的一个音频帧的可变数量的量化频谱分量，并且根据预定的频率相关量化级别执行逆量化 。 前端组件可能与音频帧速率无关。 音频处理系统还包括频域处理级（120）和采样率转换器（130），其提供以与音频帧速率无关的目标采样频率采样的重构音频信号。 通过其帧率适应性，该系统可以被配置为与接受多个视频帧速率的视频处理系统并行地同步操作。

    System and Method for Optimizing Loudness and Dynamic Range Across Different Playback Devices
    7.
    发明申请
    System and Method for Optimizing Loudness and Dynamic Range Across Different Playback Devices 有权
    用于优化不同播放设备的响度和动态范围的系统和方法

    公开(公告)号：US20150363160A1

    公开(公告)日：2015-12-17

    申请号：US14761888

    申请日：2014-01-15

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION ,  DOLBY INTERNATIONAL AB

    Inventor： Jeffrey RIEDMILLER ,  Scott Gregory NORCROSS ,  Karl Jonas ROEDEN

    IPC: G06F3/16 ,  H04R29/00

    CPC classification number: G06F3/165 ,  H03G9/005 ,  H04R29/00

    Abstract: Embodiments are directed to a method and system for receiving, in a bitstream, metadata associated with the audio data, and analyzing the metadata to determine whether a loudness parameter for a first group of audio playback devices are available in the bitstream. Responsive to determining that the parameters are present for the first group, the system uses the parameters and audio data to render audio. Responsive to determining that the loudness parameters are not present for the first group, the system analyzes one or more characteristics of the first group, and determines the parameter based on the one or more characteristics.

    Abstract translation: 实施例涉及一种用于在比特流中接收与音频数据相关联的元数据以及分析元数据以确定第一组音频回放设备的响度参数在比特流中是否可用的方法和系统。 响应于确定第一组的参数存在，系统使用参数和音频数据来呈现音频。 响应于确定第一组不存在响度参数，系统分析第一组的一个或多个特性，并且基于一个或多个特性来确定参数。

    IMPROVEMENT OF AN AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO
    8.
    发明申请
    IMPROVEMENT OF AN AUDIO SIGNAL OF AN FM STEREO RADIO RECEIVER BY USING PARAMETRIC STEREO 有权
    FM立方体无线电接收机的音频信号改进使用参数立体声

    公开(公告)号：US20150086022A1

    公开(公告)日：2015-03-26

    申请号：US14555568

    申请日：2014-11-26

    Applicant: DOLBY INTERNATIONAL AB

    Inventor： Jonas ENGDEGARD ,  Heiko PURNHAGEN ,  Karl Jonas ROEDEN

    IPC: H04S3/00

    CPC classification number: H04S3/00 ,  G10L19/008 ,  H04H40/45 ,  H04H40/72 ,  H04H40/81 ,  H04S1/00 ,  H04S1/007 ,  H04S5/00 ,  H04S2420/03

    Abstract: The invention relates to a method for improving a stereo audio signal of an FM stereo radio receiver. The method comprises determining one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the method comprises generating the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation.

    Abstract translation: 本发明涉及一种用于改进FM立体声无线电接收机的立体声音频信号的方法。 该方法包括以频率变化或频率不变的方式基于立体声音频信号确定一个或多个参数立体声参数。 优选地，这些PS参数是时间和频率变化的。 此外，该方法包括基于第一音频信号和一个或多个参数立体声参数产生改进的立体声信号。 第一音频信号是从立体声音频信号获得的。 通过下混操作。

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