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    Audio coding method and apparatus
    4.
    发明授权
    Audio coding method and apparatus 失效
    音频编码方法和装置

    公开(公告)号：US06721700B1

    公开(公告)日：2004-04-13

    申请号：US09036102

    申请日：1998-03-06

    申请人： Lin Yin

    发明人： Lin Yin

    IPC分类号： G10L1902

    CPC分类号： G10L19/04 ,  G10L19/0204 ,  G10L19/10

    摘要： A method of coding an audio signal comprises receiving an audio signal x to be coded and transforming the received signal from the time to the frequency domain. A quantised audio signal {tilde over (x)} is generated from the transformed audio signal x together with a set of long-term prediction coefficients A which can be used to predict a current time frame of the received audio signal directly from one or more previous time frames of the quantised audio signal {tilde over (x)}. A predicted audio signal {circumflex over (x)} is generated using the prediction coefficients A. The predicted audio signal {circumflex over (x)} is then transformed from the time to the frequency domain and the resulting frequency domain signal compared with that of the received audio signal x to generate an error signal E(k) for each of a plurality of frequency sub-bands. The error signals E(k) are then quantised to generate a set of quantised error signals {tilde over (E)}(k) which are combined with the prediction coefficients A to generate a coded audio signal.

    摘要翻译： 编码音频信号的方法包括接收要编码的音频信号x，并将接收的信号从时间变换到频域。 量化的音频信号x与一组长期预测系数A一起从变换的音频信号x产生，可以用于直接从量化的 音频信号x。 使用预测系数A生成预测音频信号X.然后，预测音频信号x从时间变换到频域，并将所得到的频域信号与接收到的音频信号x进行比较，以产生误差信号E（ k）对于多个频率子带中的每一个。 然后量化误差信号E（k）以产生与预测系数A组合以产生编码音频信号的一组量化误差信号E（k）。

    System and method for effectively implementing fixed masking thresholds in an audio encoder device
    5.
    发明授权
    System and method for effectively implementing fixed masking thresholds in an audio encoder device 失效
    用于在音频编码器装置中有效实现固定屏蔽阈值的系统和方法

    公开(公告)号：US06418404B1

    公开(公告)日：2002-07-09

    申请号：US09221394

    申请日：1998-12-28

    申请人： Lin Yin

    发明人： Lin Yin

    IPC分类号： G10L1902

    CPC分类号： G10L19/0208 ,  G10L25/18 ,  H04B1/665

    摘要： A system and method for effectively implementing fixed masking thresholds in an audio encoder device comprises a filter bank for filtering source audio data to produce frequency sub-bands, a lookup table for storing masking threshold corresponding to the frequency sub-bands, and a bit allocator for using the masking thresholds to identify and discard masked audio data to thereby reduce the total amount of audio data that requires processing.

    摘要翻译： 一种用于在音频编码器装置中有效实现固定屏蔽阈值的系统和方法包括用于滤波源音频数据以产生频率子带的滤波器组，用于存储对应于频率子带的掩蔽阈值的查找表，以及位分配器 用于使用掩蔽阈值来识别和丢弃被屏蔽的音频数据，从而减少需要处理的音频数据的总量。

    System and method for preventing artifacts in an audio data encoder device
    6.
    发明授权
    System and method for preventing artifacts in an audio data encoder device 失效
    用于防止音频数据编码器装置中的伪影的系统和方法

    公开(公告)号：US06240379B1

    公开(公告)日：2001-05-29

    申请号：US09220320

    申请日：1998-12-24

    申请人： Lin Yin

    发明人： Lin Yin

    IPC分类号： G10L2102

    CPC分类号： G10L19/002

    摘要： A system and method for preventing artifacts in an audio data encoder device comprises a filter bank for filtering source audio data to produce frequency sub-bands, a psycho-acoustic modeler for calculating signal-to-masking ratios for the source audio data, and a bit allocator for using the signal-to-masking ratios to assign a finite number of allocation bits to represent the frequency sub-bands. In the absence of a defined significant event, the bit allocator performs a sub-band forcing strategy, including a prebit allocation procedure, to prevent artifacts or discontinuities in the encoded audio data.

    摘要翻译： 一种用于防止音频数据编码器装置中的伪影的系统和方法包括用于滤波源音频数据以产生频率子频带的滤波器组，用于计算源音频数据的信号与掩蔽比的心理声学建模器，以及 位分配器用于使用信号到掩蔽比率来分配有限数量的分配位以表示频率子带。 在不存在定义的重要事件的情况下，位分配器执行子带强制策略，包括预定义分配过程，以防止编码音频数据中的伪像或间断。

    Audio coding method and apparatus
    7.
    发明授权
    Audio coding method and apparatus 有权
    音频编码方法和装置

    公开(公告)号：US07194407B2

    公开(公告)日：2007-03-20

    申请号：US10704068

    申请日：2003-11-07

    申请人： Lin Yin

    发明人： Lin Yin

    IPC分类号： G10L21/00

    CPC分类号： G10L19/04 ,  G10L19/0204 ,  G10L19/10

    摘要： A method of coding an audio signal comprises receiving an audio signal x to be coded and transforming the received signal from the time to the frequency domain. A quantised audio signal {tilde over (x)} is generated from the transformed audio signal x together with a set of long-term prediction coefficients A which can be used to predict a current time frame of the received audio signal directly from one or more previous time frames of the quantised audio signal {tilde over (x)}. A predicted audio signal {circumflex over (x)} is generated using the prediction coefficients A. The predicted audio signal {circumflex over (x)} is then transformed from the time to the frequency domain and the resulting frequency domain signal compared with that of the received audio signal x to generate an error signal E(k) for each of a plurality of frequency sub-bands. The error signals E(k) are then quantised to generate a set of quantised error signals {tilde over (E)}(k) which are combined with the prediction coefficients A to generate a coded audio signal.

    摘要翻译： 编码音频信号的方法包括接收要编码的音频信号x，并将接收的信号从时间变换到频域。 量化的音频信号x与一组长期预测系数A一起从变换的音频信号x产生，可以用于直接从量化的 音频信号x。 使用预测系数A生成预测音频信号X.然后，预测音频信号x从时间变换到频域，并将所得到的频域信号与接收到的音频信号x进行比较，以产生误差信号E（ k）对于多个频率子带中的每一个。 然后量化误差信号E（k）以产生与预测系数A组合以产生编码音频信号的一组量化误差信号E（k）。

    Audio coding with low-order adaptive prediction of transients
    8.
    发明授权
    Audio coding with low-order adaptive prediction of transients 失效
    具有低阶自适应预测瞬态的音频编码

    公开(公告)号：US6104996A

    公开(公告)日：2000-08-15

    申请号：US940677

    申请日：1997-09-30

    申请人： Lin Yin

    发明人： Lin Yin

    IPC分类号： G10L19/02 ,  G10L19/06 ,  G10L19/04

    CPC分类号： G10L19/06 ,  G10L19/0204

    摘要： An encoder comprising predictive coding means for encoding electronic signals input thereto is disclosed. The predictive coding means is adapted to operate in a first high prediction order mode and in a second lower prediction order mode. The predictive coding means operates in the first and second modes in dependence on an input electronic signal comprising a transient signal. Preferably, the second mode comprises a transient recovery sequence of prediction orders. The transient signal detector determines predictive coding gain as well as a difference in predictive coding gain for a sequential input signal exceeding a threshold. The prediction orders are gradually increased for subsequent signals until the first mode (high) prediction order is attained. A transmission of electronics signals provides for an indication of initiation of a second mode for the predictive coding. Circuitry is included for reception of the second mode initiate signal. There is also disclosed a decoder for decoding signals encoded by the encoder.

    摘要翻译： 公开了一种编码器，包括用于对输入的电子信号进行编码的预测编码装置。 预测编码装置适于在第一高预测顺序模式和第二较低预测顺序模式中操作。 预测编码装置根据包括瞬态信号的输入电子信号在第一和第二模式中工作。 优选地，第二模式包括预测顺序的瞬时恢复序列。 瞬态信号检测器确定预测编码增益以及超过阈值的顺序输入信号的预测编码增益差。 对于后续的信号，预测顺序逐渐增加，直到达到第一模式（高）预测顺序。 电子信号的传输提供用于预测编码的第二模式的启动的指示。 包括电路用于接收第二模式启动信号。 还公开了一种用于对由编码器编码的信号进行解码的解码器。

    Method and system for copying DMA with separate strides by a modulo-n counter
    9.
    发明授权
    Method and system for copying DMA with separate strides by a modulo-n counter 失效
    通过模数n计数器复制具有单独步幅的DMA的方法和系统

    公开(公告)号：US07809902B2

    公开(公告)日：2010-10-05

    申请号：US10350296

    申请日：2003-01-24

    申请人： Gregory H. Efland ,  Jeff Z. Guan ,  Lin Yin

    发明人： Gregory H. Efland ,  Jeff Z. Guan ,  Lin Yin

    IPC分类号： G06F13/00

    CPC分类号： H04L7/0012 ,  G06F9/52 ,  H03M13/2732 ,  H03M13/6533 ,  H04L1/0071 ,  H04L7/0029 ,  H04L25/03159 ,  H04L27/2647 ,  H04L45/00 ,  H04L49/90 ,  H04L2012/5681 ,  H04M11/062

    摘要： Provided is a system and method for de-interleaving a data stream stored in a buffer having a plurality of memory locations. Each location has a memory width of (W) bytes and the data stream is formed of a number of data words each including (N) number of data bytes, and (N) is a non-integer multiple of the width (W). The method includes storing the data words into respective memory locations and appending each of the stored data words with number (X) of dummy bytes, a sum of (N)+(X) being an integer multiple of the width (W). The appended dummy bytes are then stored in the respective memory locations.

    摘要翻译： 提供了一种用于对存储在具有多个存储器位置的缓冲器中的数据流进行解交织的系统和方法。 每个位置具有（W）字节的存储器宽度，并且数据流由多个数据字形成，每个数据字包括（N）个数据字节数，并且（N）是宽度（W）的非整数倍。 该方法包括将数据字存储到相应的存储器位置中，并且将每个存储的数据字与虚拟字节的数目（X）相加，（N）+（X）是宽度（W）的整数倍的和。 然后将附加的虚拟字节存储在相应的存储单元中。