Huffman decoding using cascaded sub-table lookup method
    1.
    发明授权
    Huffman decoding using cascaded sub-table lookup method 失效
    霍夫曼解码使用级联子表查找方法

    公开(公告)号:US06580377B1

    公开(公告)日:2003-06-17

    申请号:US09870176

    申请日:2001-05-30

    IPC分类号: H03M740

    CPC分类号: H03M7/425

    摘要: A bitstream is sampled at an interval predetermined as a function of available processing power and memory storage capacity. The sampled bits are evaluated against a first layer Huffman decoding subtable. The subtable obtains the address of a second layer subtable from an indexed location identified by the sampled bits. A second bit sample is parsed to the designated second layer subtable, which outputs either an address for a third layer subtable, or a symbol and an associated code length.

    摘要翻译: 以作为可用处理能力和存储器存储容量的函数的预定间隔对比特流进行采样。 针对第一层霍夫曼解码子进行评估。 该子表获取从由采样位识别的索引位置可隐藏的第二层的地址。 第二比特样本被解析为指定的第二层子表,其可输出用于第三层可替换的地址,或者输出符号和相关联的代码长度。

    Audio post processing in DVD, DTV and other audio visual products
    2.
    发明授权
    Audio post processing in DVD, DTV and other audio visual products 失效
    DVD,DTV等视听产品的音频后处理

    公开(公告)号:US07668317B2

    公开(公告)日:2010-02-23

    申请号:US09867736

    申请日:2001-05-30

    IPC分类号: H04H5/00

    摘要: The method and system of present invention sequences audio post-processing algorithms to simulate live or theater sound. An audio signal is selectively post-processed according to equipment availability and listener preferences. Downmixing or Prologic algorithms are applied to a signal arriving at sound system. A listener inputs their speaker configuration to a player console. Desired post-processing effects are likewise indicated to the console. For instance, if surround sound equipment is both available and selected, then surround portions of the audio signal are parsed to surround speakers. Bass management techniques then transfer low frequency channels of the signal to compatible speakers. VES or DCS algorithms further manipulate the surround portion of the signal to create an illusion of immersion, and a center channel equalizer balances the signal playback. Alternatively, the post-processed signal is transmitted to a headphone set.

    摘要翻译: 本发明的方法和系统对音频后处理算法进行排序以模拟现场或剧院声音。 音频信号根据设备可用性和听众偏好进行选择性后处理。 下混音或Prologic算法应用于到达声音系统的信号。 听众将其扬声器配置输入到播放器控制台。 所需的后处理效果也同样显示在控制台上。 例如,如果环绕声设备可用并且被选择,则音频信号的环绕部分被解析为环绕扬声器。 然后,低音管理技术将信号的低频信道传输到兼容的扬声器。 VES或DCS算法进一步操纵信号的环绕部分以产生浸没幻觉,并且中心通道均衡器平衡信号回放。 或者,后处理的信号被发送到耳机组。

    Memory sharing scheme in audio post-processing
    3.
    发明授权
    Memory sharing scheme in audio post-processing 失效
    音频后处理中的内存共享方案

    公开(公告)号:US06917915B2

    公开(公告)日:2005-07-12

    申请号:US09867735

    申请日:2001-05-30

    IPC分类号: H04R3/02 H04S1/00 G10L21/04

    CPC分类号: H04S3/008

    摘要: A method, apparatus and program product facilitates the sharing of memory resources between exclusive audio post-processes. A program identifies post-processing applications that execute at different instances and assigns to them a common memory block. An audio packet arrives at a digital signal processor (DSP). The DSP associates a frame of the packet with a post-process. The DSP buffers the frame to a memory block that corresponds to the post-process. Upon releasing the buffered frame, the DSP prepares the memory block for use with a second post-process and frame.

    摘要翻译: 一种方法,装置和程序产品有助于在专用音频后处理之间共享存储器资源。 程序识别在不同实例执行的后处理应用程序,并向它们分配一个公共内存块。 音频数据包到达数字信号处理器(DSP)。 DSP将数据包的帧与后处理相关联。 DSP将帧缓冲到对应于后处理的存储器块。 在释放缓冲帧时,DSP准备存储块以用于第二后处理和帧。

    System and method for accurately calculating a mathematical power function in an electronic device
    5.
    发明授权
    System and method for accurately calculating a mathematical power function in an electronic device 失效
    用于在电子设备中精确计算数学功能函数的系统和方法

    公开(公告)号:US07167888B2

    公开(公告)日:2007-01-23

    申请号:US10314652

    申请日:2002-12-09

    IPC分类号: G06F7/38

    CPC分类号: G06F1/0356 G06F2101/08

    摘要: A system and method for accurately calculating a mathematical power function in an electronic device may include an application program that is configured to calculate a direct estimate of power function value for the mathematical power function during a direct linear interpolations procedure. The application program may also calculate an indirect estimate of power function value for a complement power function during an indirect linear interpolation procedure. The application program may then perform a final function-estimate calculation procedure to accurately produce a final estimated power function value from the foregoing direct estimate of power function value and indirect estimate of power function value.

    摘要翻译: 一种用于在电子设备中精确计算数学功能函数的系统和方法可以包括:应用程序,其被配置为在直接线性内插过程期间计算数学功能函数的功率函数值的直接估计。 在间接线性插值过程期间,应用程序还可以计算补码功率函数的功率函数值的间接估计。 然后,应用程序可以执行最终的功能估计计算程序,以从上述功率函数值的直接估计和功率函数值的间接估计中精确地产生最终的估计功率函数值。