AUDIO PLAYBACK DEVICE HAVING FUNCTION FOR ADJUSTING PLAYBACK SPEED AND A METHOD THEREOF
    91.
    发明申请
    AUDIO PLAYBACK DEVICE HAVING FUNCTION FOR ADJUSTING PLAYBACK SPEED AND A METHOD THEREOF 有权
    具有调整播放速度的功能的音频播放设备及其方法

    公开(公告)号:US20080228297A1

    公开(公告)日:2008-09-18

    申请号:US11867823

    申请日:2007-10-05

    IPC分类号: G06F17/00

    摘要: An audio playback device having a function for adjusting a playback speed, and a method thereof includes, in the audio playback device, stored audio data is decoded and converted into an audio stream in a PCM format, and the audio stream is divided into a high frequency band and a low frequency band at cut-off frequency. The audio stream of the high frequency band is signal-processed using an overlap add (OLA) algorithm, and the audio stream of the low frequency band is down-sampled and signal-processed using a synchronized overlap and add (SOLA) algorithm. Accordingly, calculation time of the stream processor 130 is minimized so that a TSM function is efficiently implemented.

    摘要翻译: 具有用于调整播放速度的功能的音频播放设备及其方法包括:在音频播放设备中,存储的音频数据被解码并以PCM格式转换成音频流,并将音频流分为高 频带和截止频率的低频带。 使用重叠加法(OLA)算法对高频带的音频流进行信号处理,并使用同步重叠和加法(SOLA)算法对低频带的音频流进行下采样和信号处理。 因此,流处理器130的计算时间被最小化,使得TSM功能被有效地实现。

    Charge/discharge control circuit for audio device
    92.
    发明申请
    Charge/discharge control circuit for audio device 有权
    音频设备充放电控制电路

    公开(公告)号:US20070030038A1

    公开(公告)日:2007-02-08

    申请号:US11475265

    申请日:2006-06-27

    IPC分类号: H03K5/01

    摘要: A charge/discharge control circuit for controlling current through an input/output audio device includes a first voltage reference; a second voltage reference and a waveform generation circuit responsive to the first and second voltage references for generating a multi-stage waveform profile which is approximately an inaudible waveform for suppressing audible artifacts in the input/output device.

    摘要翻译: 用于控制通过输入/输出音频设备的电流的充电/放电控制电路包括第一电压基准; 第二参考电压和波形发生电路,其响应于第一和第二参考电压,用于产生多级波形分布,该波形分布近似为用于抑制输入/输出装置中的可听见的伪影的不可听见的波形。

    Audio processing system
    93.
    发明申请
    Audio processing system 审中-公开
    音频处理系统

    公开(公告)号:US20060168114A1

    公开(公告)日:2006-07-27

    申请号:US11097446

    申请日:2005-03-31

    IPC分类号: G06F15/16 G06F15/177

    摘要: A single universal audio processing system intelligently and transparently processes audio streams in real-time. The system receives audio input from one or more sources, determines how the streams should be processed, and automatically processes them in real-time for delivery to an output system. The processing happens without any intervention from the output system, which is oblivious to this processing. A set of audio processing algorithms to accomplish acoustic echo cancellation (AEC), resampling, format conversion, channel mixing or any other desired audio processing function can be supported by a universal processing system, providing a universal solution to audio processing regardless of source or sink. In one embodiment, processing functionality is implemented in an upper filter driver created using a “framework” or software architecture that implements a conventional WDM filter and a dedicated environment for audio processing.

    摘要翻译: 单个通用音频处理系统实时智能和透明地处理音频流。 系统从一个或多个源接收音频输入,确定流如何处理,并自动处理它们以便传送到输出系统。 处理发生在输出系统没有任何干预的情况下,这对于这种处理是无意义的。 用于实现声学回声消除(AEC),重采样,格式转换,信道混合或任何其他所需音频处理功能的一组音频处理算法可以由通用处理系统支持,提供对音频处理的通用解决方案,而不管源或汇 。 在一个实施例中,处理功能在使用实现常规WDM滤波器和用于音频处理的专用环境的“框架”或软件体系结构创建的上部滤波器驱动器中实现。

    Method for determining characteristics of signal and apparatus using the same
    95.
    发明申请
    Method for determining characteristics of signal and apparatus using the same 有权
    用于确定信号和使用其的装置的特性的方法

    公开(公告)号:US20050128918A1

    公开(公告)日:2005-06-16

    申请号:US10979815

    申请日:2004-11-03

    IPC分类号: G11B3/00 G11B20/10

    摘要: A method of determining characteristics of a signal and an apparatus using the method. The apparatus for determining characteristics of a signal includes: a level detector receiving sample values of a radio frequency (RF) signal and binary data obtained by binarizing the RF signal, generating selection signals based on the binary data, classifying each of the sample values of the RF signal into one of a plurality of levels using the selection signals, and outputting average values of sample values of each level; and a signal characteristics determiner determining a characteristics value that indicates the characteristics of the RF signal using the average values of the sample values belonging to each level.

    摘要翻译: 一种确定信号特性的方法和使用该方法的装置。 用于确定信号特性的装置包括:电平检测器,其接收射频(RF)信号的采样值和通过二值化RF信号获得的二进制数据,基于二进制数据产生选择信号,将每个样本值 使用所述选择信号将所述RF信号变换成多个电平之一,并输出各电平的采样值的平均值; 以及信号特性确定器,其使用属于每个级别的样本值的平均值来确定指示RF信号的特性的特性值。

    Audio signal processor
    96.
    发明申请
    Audio signal processor 有权
    音频信号处理器

    公开(公告)号:US20050096766A1

    公开(公告)日:2005-05-05

    申请号:US10976117

    申请日:2004-10-28

    IPC分类号: G10H1/02 G06F17/00

    摘要: An audio signal processor is composed of a data path unit, a mode register and a state machine unit. The data path unit applies one or more arithmetical operation to an audio signal for performing signal processing of the audio signal. The mode register stores mode information specifying the signal processing to be performed by the data path unit. The state machine unit sequentially feeds control signals according to the mode information for enabling the data path unit to apply one or more arithmetical operation to the audio signal so as to perform the signal processing. The performed signal processing is composed of the one or more arithmetical operations, and is specified by the mode information stored in the mode register.

    摘要翻译: 音频信号处理器由数据路径单元,模式寄存器和状态机单元组成。 数据路径单元对音频信号应用一个或多个算术运算,以执行音频信号的信号处理。 模式寄存器存储指定要由数据路径单元执行的信号处理的模式信息。 状态机单元根据模式信息依次馈送控制信号,以使数据路径单元能够对音频信号应用一个或多个算术运算,以执行信号处理。 执行的信号处理由一个或多个算术运算组成,并由存储在模式寄存器中的模式信息指定。