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    Encoder-assisted frame loss concealment techniques for audio coding
    2.
    发明授权
    Encoder-assisted frame loss concealment techniques for audio coding 有权
    用于音频编码的编码器辅助帧丢失隐藏技术

    公开(公告)号：US08620644B2

    公开(公告)日：2013-12-31

    申请号：US11431733

    申请日：2006-05-10

    申请人： Sang-Uk Ryu ,  Eddie L. T. Choy ,  Samir Kumar Gupta

    发明人： Sang-Uk Ryu ,  Eddie L. T. Choy ,  Samir Kumar Gupta

    IPC分类号： G10L19/00

    CPC分类号： G10L19/005 ,  G10L19/02

    摘要： Encoder-assisted frame loss concealment (FLC) techniques for decoding audio signals are described. A decoder may discard an erroneous frame of an audio signal and may implement the encoder-assisted FLC techniques in order to accurately conceal the discarded frame based on neighboring frames and side-information transmitted from the encoder. The encoder-assisted FLC techniques include estimating magnitudes of frequency-domain data for the frame based on frequency-domain data of neighboring frames, and estimating signs of the frequency-domain data based on a subset of signs transmitted from the encoder as side-information. Frequency-domain data for a frame of an audio signal includes tonal components and noise components. Signs estimated from a random signal may be substantially accurate for the noise components of the frequency-domain data. However, to achieve highly accurate sign estimation for the tonal components, the encoder transmits signs for the tonal components of the frequency-domain data as side-information.

    摘要翻译： 描述了用于解码音频信号的编码器辅助帧丢失隐藏（FLC）技术。 解码器可以丢弃音频信号的错误帧，并且可以实现编码器辅助的FLC技术，以便基于相邻帧和从编码器发送的侧信息来准确地隐藏丢弃的帧。 编码器辅助FLC技术包括基于相邻帧的频域数据估计帧的频域数据的幅度，并且基于从编码器发送的符号子集来估计频域数据的符号作为侧信息 。 音频信号的帧的频域数据包括音调分量和噪声分量。 从随机信号估计的符号对于频域数据的噪声分量可能是基本准确的。 然而，为了实现对音调分量的高度准确的符号估计，编码器将用于频域数据的音调分量的符号作为侧信息发送。

    Waveform fetch unit for processing audio files
    6.
    发明授权
    Waveform fetch unit for processing audio files 有权
    用于处理音频文件的波形提取单元

    公开(公告)号：US07807914B2

    公开(公告)日：2010-10-05

    申请号：US12041834

    申请日：2008-03-04

    申请人： Nidish Ramachandra Kamath ,  Prajakt V Kulkarni ,  Samir Kumar Gupta ,  Stephen Molloy ,  Suresh Devalapalli ,  Allister Alemania

    发明人： Nidish Ramachandra Kamath ,  Prajakt V Kulkarni ,  Samir Kumar Gupta ,  Stephen Molloy ,  Suresh Devalapalli ,  Allister Alemania

    IPC分类号： G10H7/00

    CPC分类号： G10H7/004 ,  G10H2230/031 ,  G10H2250/641

    摘要： This disclosure describes techniques that make use of a waveform fetch unit that operates to retrieve waveform samples on behalf of each of a plurality of hardware processing elements that operate simultaneously to service various audio synthesis parameters generated from one or more audio files, such as musical instrument digital interface (MIDI) files. In one example, a method comprises receiving a request for a waveform sample from an audio processing element, and servicing the request by calculating a waveform sample number for the requested waveform sample based on a phase increment contained in the request and an audio synthesis parameter control word associated with the requested waveform sample, retrieving the waveform sample from a local cache using the waveform sample number, and sending the retrieved waveform sample to the requesting audio processing element.

    摘要翻译： 本公开描述了利用波形获取单元的技术，其操作以代表同时操作的多个硬件处理元件中的每一个来检索波形采样，以服务从一个或多个音频文件（例如乐器）生成的各种音频合成参数 数字接口（MIDI）文件。 在一个示例中，一种方法包括从音频处理元件接收对波形样本的请求，并且通过基于包含在请求中的相位增量和音频合成参数控制来计算所请求的波形样本的波形采样数来为该请求提供服务 与所请求的波形样本相关联的单词，使用波形采样号从本地高速缓存中检索波形采样，以及将检索的波形样本发送到请求音频处理单元。

    Synthetic carriers
    7.
    发明授权
    Synthetic carriers 有权
    合成载体

    公开(公告)号：US07754408B2

    公开(公告)日：2010-07-13

    申请号：US11238112

    申请日：2005-09-29

    申请人： Samir Kumar ,  Dan A. Hays

    发明人： Samir Kumar ,  Dan A. Hays

    IPC分类号： G03G9/10

    CPC分类号： G03G9/107 ,  G03G9/10 ,  G03G9/1132 ,  G03G9/1138 ,  G03G9/1139

    摘要： A carrier includes at least one magnetic material and a conductive material. The conductive material is at least one carbon nanotube. A developer includes a toner and the carrier.

    摘要翻译： 载体包括至少一种磁性材料和导电材料。 导电材料是至少一个碳纳米管。 显影剂包括调色剂和载体。

    Automatic volume and dynamic range adjustment for mobile audio devices
    8.
    发明授权
    Automatic volume and dynamic range adjustment for mobile audio devices 有权
    移动音频设备的自动音量和动态范围调整

    公开(公告)号：US07742746B2

    公开(公告)日：2010-06-22

    申请号：US11742476

    申请日：2007-04-30

    申请人： Pei Xiang ,  Song Wang ,  Prajakt V. Kulkarni ,  Samir Kumar Gupta ,  Eddie L. T. Choy

    发明人： Pei Xiang ,  Song Wang ,  Prajakt V. Kulkarni ,  Samir Kumar Gupta ,  Eddie L. T. Choy

    IPC分类号： H04B1/00

    CPC分类号： H03G7/007 ,  H03G3/32 ,  H04M1/6016

    摘要： A mobile audio device (for example, a cellular telephone, personal digital audio player, or MP3 player) performs Audio Dynamic Range Control (ADRC) and Automatic Volume Control (AVC) to increase the volume of sound emitted from a speaker of the mobile audio device so that faint passages of the audio will be more audible. This amplification of faint passages occurs without overly amplifying other louder passages, and without substantial distortion due to clipping. Multi-Microphone Active Noise Cancellation (MMANC) functionality is, for example, used to remove background noise from audio information picked up on microphones of the mobile audio device. The noise-canceled audio may then be communicated from the device. The MMANC functionality generates a noise reference signal as an intermediate signal. The intermediate signal is conditioned and then used as a reference by the AVC process. The gain applied during the AVC process is a function of the noise reference signal.

    摘要翻译： 移动音频设备（例如，蜂窝电话，个人数字音频播放器或MP3播放器）执行音频动态范围控制（ADRC）和自动音量控制（AVC）以增加从移动音频的扬声器发出的声音的音量 设备使得音频的微弱通道更可听见。 这种微弱通道的放大发生，而不会过度放大其他更大的通道，并且没有由于限幅导致的实质性变形。 例如，多麦克风有源噪声消除（MMANC）功能用于从移动音频设备的麦克风拾取的音频信息中去除背景噪声。 然后可以从设备传送噪声消除的音频。 MMANC功能产生噪声参考信号作为中间信号。 中间信号被调节，然后用作AVC处理的参考。 在AVC过程中应用的增益是噪声参考信号的函数。

    UNIFIED FILTER BANK FOR PERFORMING SIGNAL CONVERSIONS
    9.
    发明申请
    UNIFIED FILTER BANK FOR PERFORMING SIGNAL CONVERSIONS 有权
    用于执行信号转换的统一过滤器银行

    公开(公告)号：US20090024397A1

    公开(公告)日：2009-01-22

    申请号：US12174498

    申请日：2008-07-16

    申请人： Sang-Uk Ryu ,  Eddie L.T. Choy ,  Nidish Ramachandra Kamath ,  Samir Kumar Gupta ,  Suresh Devalapalli

    发明人： Sang-Uk Ryu ,  Eddie L.T. Choy ,  Nidish Ramachandra Kamath ,  Samir Kumar Gupta ,  Suresh Devalapalli

    IPC分类号： G10L19/00

    CPC分类号： G10L19/16 ,  G10L19/0212

    摘要： A unified filter bank for performing signal conversions may include an interface that receives signal conversion commands in relation to multiple types of compressed audio bitstreams. The unified filter bank may also include a reconfigurable transform component that performs a transform as part of signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include complementary modules that perform complementary processing as part of the signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include an interface command controller that controls the configuration of the reconfigurable transform component and the complementary modules.

    摘要翻译： 用于执行信号转换的统一滤波器组可以包括接收关于多种类型的压缩音频位流的信号转换命令的接口。 统一的滤波器组还可以包括可重新配置的变换组件，其执行作为多种类型的压缩音频位流的信号转换的一部分的变换。 统一的滤波器组还可以包括作为多种类型的压缩音频比特流的信号转换的一部分执行补充处理的互补模块。 统一的滤波器组还可以包括控制可重构变换组件和互补模块的配置的接口命令控制器。

    AUTOMATIC VOLUME AND DYNAMIC RANGE ADJUSTMENT FOR MOBILE AUDIO DEVICES
    10.
    发明申请
    AUTOMATIC VOLUME AND DYNAMIC RANGE ADJUSTMENT FOR MOBILE AUDIO DEVICES 有权
    自动音量和动态范围调整移动音频设备

    公开(公告)号：US20080269926A1

    公开(公告)日：2008-10-30

    申请号：US11742476

    申请日：2007-04-30

    申请人： Pei Xiang ,  Song Wang ,  Prajakt V. Kulkarni ,  Samir Kumar Gupta ,  Eddie L.T. Choy

    发明人： Pei Xiang ,  Song Wang ,  Prajakt V. Kulkarni ,  Samir Kumar Gupta ,  Eddie L.T. Choy

    IPC分类号： H04S7/00

    CPC分类号： H03G7/007 ,  H03G3/32 ,  H04M1/6016

    摘要： A mobile audio device (for example, a cellular telephone, personal digital audio player, or MP3 player) performs Audio Dynamic Range Control (ADRC) and Automatic Volume Control (AVC) to increase the volume of sound emitted from a speaker of the mobile audio device so that faint passages of the audio will be more audible. This amplification of faint passages occurs without overly amplifying other louder passages, and without substantial distortion due to clipping. Multi-Microphone Active Noise Cancellation (MMANC) functionality is, for example, used to remove background noise from audio information picked up on microphones of the mobile audio device. The noise-canceled audio may then be communicated from the device. The MMANC functionality generates a noise reference signal as an intermediate signal. The intermediate signal is conditioned and then used as a reference by the AVC process. The gain applied during the AVC process is a function of the noise reference signal.

    摘要翻译： 移动音频设备（例如，蜂窝电话，个人数字音频播放器或MP3播放器）执行音频动态范围控制（ADRC）和自动音量控制（AVC）以增加从移动音频的扬声器发出的声音的音量 设备使得音频的微弱通道更可听见。 这种微弱通道的放大发生，而不会过度放大其他更大的通道，并且没有由于限幅导致的实质性变形。 例如，多麦克风有源噪声消除（MMANC）功能用于从移动音频设备的麦克风拾取的音频信息中去除背景噪声。 然后可以从设备传送噪声消除的音频。 MMANC功能产生噪声参考信号作为中间信号。 中间信号被调节，然后用作AVC处理的参考。 在AVC过程中应用的增益是噪声参考信号的函数。