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    • 4. 发明授权
    • Device and process for data rate acquisition
    • 用于数据速率采集的设备和过程
    • US08279989B2
    • 2012-10-02
    • US12375563
    • 2006-08-02
    • Bo ShenLiping Chen
    • Bo ShenLiping Chen
    • H04L7/00
    • H04L7/0054H03L7/091H03L7/0991H03L7/107H03L7/1075H03L7/113H03L7/12H04L7/0004H04L7/0029H04L7/027
    • A baud rate acquisition circuit (10) for synchronizing a sampling signal with an input signal operates in broad rate sweeping and a rate fine tuning phases. In the rate sweeping phase, a timing error detector (24) examines the sampling signal generated by a decimator (16). If the sampling signal is outside a rate acquisition range from the target rate, a rate sweeping algorithm selects a new sampling rate. In response to the sampling rate within the rate acquisition range, the timing error detector (24) examines the asymmetry thereof to generate a rate correction signal to synchronize the sampling signal with the input signal. Next in the rate fine tuning phase, a multiplexer (22) routes the sampling signal through a square root filter (18). By examining the waveform shaped signal, the time error detector (24) synchronizes the sampling signal with the input signal with high accuracy.
    • 用于使采样信号与输入信号同步的波特率采集电路(10)以广泛的频率扫描和速率微调相位工作。 在速率扫描阶段中,定时误差检测器(24)检查由抽取器(16)产生的采样信号。 如果采样信号在目标速率以外的速率采集范围之外,则速率扫描算法选择新的采样率。 响应于速率采集范围内的采样率,定时误差检测器(24)检查其不对称性,以产生速率校正信号,以使采样信号与输入信号同步。 接下来在速率微调相位中,多路复用器(22)将采样信号通过平方根滤波器(18)。 通过检查波形信号,时间误差检测器(24)以高精度同步采样信号与输入信号。
    • 5. 发明授权
    • Reducing the resolution of media data
    • 减少媒体数据的分辨率
    • US08199825B2
    • 2012-06-12
    • US11011866
    • 2004-12-14
    • Bo Shen
    • Bo Shen
    • H04N7/46H04N7/36H04N7/50H04N7/26
    • H04N19/59H04N19/107H04N19/132H04N19/159H04N19/176H04N19/18H04N19/40H04N19/48H04N19/61
    • Input data at a first resolution are received from a source. The input data are compressed. The input data can be downsampled to generate compressed downsampled data at a reduced resolution. The compressed downsampled data can be used to generate a frame at the reduced resolution. When the frame is needed as a reference for another frame, the compressed downsampled data can be decoded to generate decompressed downsampled data at the reduced resolution. Motion compensation is performed on the decompressed downsampled data at the second resolution to generate motion compensated decompressed downsampled data used as a reference for a second frame. Thus, by performing motion compensation on downsampled data directly, data processing operations such as transcoding can be accomplished quickly and effectively while saving computing resources.
    • 从源接收第一分辨率的输入数据。 输入数据被压缩。 可以对输入数据进行下采样,以降低分辨率产生压缩的采样数据。 压缩的下采样数据可以用于以降低的分辨率生成帧。 当需要帧作为另一帧的参考时,可以对压缩的下采样数据进行解码,以降低分辨率产生解压缩的下采样数据。 以第二分辨率对解压缩的下采样数据执行运动补偿,以产生用作第二帧的参考的运动补偿解压缩下采样数据。 因此,通过直接对下采样数据执行运动补偿,可以在节省计算资源的同时快速有效地实现诸如转码的数据处理操作。