Process for finding the overall monitoring threshold during a
bit-rate-reducing source coding
    1.
    发明授权
    Process for finding the overall monitoring threshold during a bit-rate-reducing source coding 失效
    在比特率降低源编码期间查找整体监视阈值的过程

    公开(公告)号:US5740317A

    公开(公告)日:1998-04-14

    申请号:US520765

    申请日:1995-08-30

    CPC分类号: H04B1/665

    摘要: Source coding digitized audio signals includes providing time or spectral domain sampling values of the digitized audio signal, requantizing the sampling values according their permissible quantizing noise as determined by a coding and requantizing control signal, and multiplexing the control signal and the requantized sampling values into a time multiplex frame depending on the bit rate reduction employed. The coding and requantizing control signal is determined from the sampling values by determining the global masking effect from all relevant maskers which are tonal maskers and noise maskers, and which result from the sampling values, and from a silence audio threshold. The global masking effect is determined by segmenting masking edges of possible maskers and approximating in individual segments with lower order polynomials, and determining coefficients of the lower order polynomials, converting the maskers into logarithmic levels and using intensities of the maskers to determine the coefficients of the lower order polynomials, and determining the global masking threshold, step-wise, masker by masker, at individual possible base points, from the polynomials describing masking edges of the possible maskers.

    摘要翻译: PCT No.PCT / EP92 / 01658 Sec。 371日期:1993年9月17日 102(e)日期1993年9月17日PCT提交1992年7月21日PCT公布。 公开号WO93 / 02508 日期:1993年2月4日源编码数字化音频信号包括提供数字化音频信号的时间或频域采样值,根据编码和再量化控制信号确定的可允许量化噪声重新采样采样值,并将控制信号和 根据所采用的比特率降低将需要量化的采样值分配到时间多路复用帧中。 通过从所有相关掩蔽器(其是音调掩蔽器和噪声掩蔽器)确定全局掩蔽效应,以及由采样值以及从静音音频阈值确定来自采样值的编码和再量化控制信号。 通过对可能的掩蔽器的掩蔽边缘进行分割并在具有较低阶多项式的各个段中近似来确定全局掩蔽效应,并且确定较低阶多项式的系数,将掩蔽器转换成对数级别,并且使用掩模的强度来确定 低阶多项式,以及在描述可能的掩蔽者的掩蔽边缘的多项式的各个可能的基点处,通过掩蔽器逐步地确定全局掩蔽阈值。

    Method of transmitting and/or storing digitized, data-reduced audio
signals
    3.
    发明授权
    Method of transmitting and/or storing digitized, data-reduced audio signals 失效
    发送和/或存储数字化,数据简化的音频信号的方法

    公开(公告)号:US5659660A

    公开(公告)日:1997-08-19

    申请号:US313255

    申请日:1995-01-03

    IPC分类号: H04B1/62 H04B1/66 G10L9/00

    CPC分类号: H04B1/665 H04B1/62 H04B1/66

    摘要: A method of encoding an audio signal for transmission and/or for storage includes changing a digitized audio signal based on a selected signal changing criteria. The changed digitized audio signal is encoded, based at least on an available data rate for transmitting and/or storing the audio signal, for reducing an amount of data associated with the changed, digitized audio signal. The reduced-data audio signal is then evaluated for determining whether a code overload condition exists. If a code overload condition exists, another signal changing criteria is selected. A time behavior and/or a spectral distribution of the digitized audio signal is recursively changed based on the another signal changing criteria before the amount of data associated with the digitized audio signal is reduced so that deterioration of reduced-data audio signal is not perceptible when the coded signal is decoded. The recursively changed digitized audio signal is encoded for reducing an amount of data associated with the recursively changed digitized audio signal based at least on the available data rate. Lastly, the recursively changed encoded reduced-data digitized audio signal is transmitted and/or stored.

    摘要翻译: PCT No.PCT / EP93 / 00690 Sec。 371日期1995年1月3日 102(e)日期1995年1月3日PCT 1993年3月22日PCT公布。 公开号WO93 / 21694 PCT 日期1993年10月28日一种用于发送和/或存储的音频信号的编码方法包括:基于所选择的信号改变标准来改变数字化的音频信号。 至少基于用于发送和/或存储音频信号的可用数据速率,改变的数字化音频信号被编码,以减少与改变的数字化音频信号相关联的数据量。 然后评估缩减数据音频信号以确定是否存在代码过载条件。 如果存在代码过载条件,则选择另一个信号更改条件。 在与数字化音频信号相关联的数据量减少之前,基于另一个信号改变标准,数字化音频信号的时间行为和/或频谱分布被递归地改变,使得减少数据音频信号的恶化不可察觉, 编码信号被解码。 编码递归改变的数字化音频信号,以至少基于可用的数据速率来减少与递归改变的数字化音频信号相关联的数据量。 最后,传送和/或存储递归改变的编码缩减数据数字化音频信号。

    Method of transmitting or storing masked sub-band coded audio signals
    5.
    发明授权
    Method of transmitting or storing masked sub-band coded audio signals 失效
    发送或存储被屏蔽的子带编码音频信号的方法

    公开(公告)号:US4972484A

    公开(公告)日:1990-11-20

    申请号:US238350

    申请日:1988-07-21

    CPC分类号: H04H20/88 H04B1/665

    摘要: In the transmission of audio signals, the audio signal is digitally represented by use of quadrature mirror filtering in the form a plurality of spectral sub-band signals. The quantizing of the sample values in the sub-bands, e.g. 24 sub-bands, is controlled to the extent that the quantizing noise levels of the individual sub-band signals are at approximately the same level difference from the masking threshold of the human auditory system resulting from the individual sub-band signals. The differences of the quantizing noise levels of the sub-band signals with respect to the resulting masking threshold are set by the difference between the total information flow required for coding and the total information flow available for coding. The available total information flow is set and may then fluctuate as a function of the signal.

    摘要翻译: PCT No.PCT / EP87 / 00723 Sec。 371日期:1988年7月21日 102(e)日期1988年7月21日PCT申请日1987年11月20日PCT公布。 出版物WO88 / 04117 日期:1988年6月2日。在音频信号的传输中,音频信号以多个频谱子带信号的形式使用正交镜像滤波数字地表示。 量子化子带中的样本值,例如 24个子带被控制到个别子带信号的量化噪声电平与由各个子带信号产生的人体听觉系统的掩蔽阈值大致相同的水平差的程度。 子带信号的量化噪声电平相对于所得到的掩蔽阈值的差异由编码所需的总信息流与可用于编码的总信息流之间的差设定。 可用的总信息流程被设置,然后可以作为信号的函数而波动。

    Method of transmitting or storing digitalized, multi-channel audio
signals
    6.
    发明授权
    Method of transmitting or storing digitalized, multi-channel audio signals 失效
    传输或存储数字化,多声道音频信号的方法

    公开(公告)号:US5682461A

    公开(公告)日:1997-10-28

    申请号:US307665

    申请日:1994-11-21

    CPC分类号: H04H20/88 H04B1/665

    摘要: In order to transmit or to store digitalized, multi-channel audio signals which are digitally represented by a plurality of spectral subband signals, at an encoder, subband signals of different audio channels but having the same frequency position are combined across channels according to a dynamic control signal. This control signal is derived from several audio channels by an audio signal analysis based on a psycho-acoustic binaural model. At a decoder, the subband signals of several audio channels but having the same frequency position are dissociated across channels according to a control value derived from the dynamic control signal, transmitted or stored therewith.

    摘要翻译: PCT No.PCT / EP93 / 00629 Sec。 371日期:1994年11月21日 102(e)日期1994年11月21日PCT 1993年3月17日PCT公布。 公开号WO93 / 19542 日期1992年9月30日为了在编码器处发送或存储由多个频谱子带信号数字化表示的数字化多声道音频信号,将不同音频频道的子频带信号但具有相同频率位置的子频带信号组合在一起 通道根据动态控制信号。 该控制信号通过基于心理声学双耳模型的音频信号分析从多个音频通道导出。 在解码器处,根据从其发送或存储的动态控制信号导出的控制值,多个音频信道的具有相同频率位置的子带信号在信道上解离。

    Electronic device and method for performing multiple processes with the electronic device
    10.
    发明授权
    Electronic device and method for performing multiple processes with the electronic device 有权
    用于使用电子设备执行多个处理的电子设备和方法

    公开(公告)号:US08938741B2

    公开(公告)日:2015-01-20

    申请号:US11632729

    申请日:2005-07-05

    IPC分类号: G06F9/46 G01F23/00 G01F23/284

    CPC分类号: G01F23/0069 G01F23/284

    摘要: An electronic device, and a method for executing a plurality of processes with the electronic device, wherein, in a resource-conserving manner, rapid response times are achievable, in that the electronic device, during operation, executes first and second processes (P1, P2), of which the first processes (P1) are executable as approximate solutions (P1-A) and as detailed calculations (P1-C). The electronic device includes a processor for executing processes (P1, P2) and an electronic unit or a multitasking-capable operating system. The electronic unit includes a component, which recognizes whether the processor is active, and serves, while the processor is active and a simultaneous execution of at least two processes is required, for executing the first processes (P1), in that it, itself, determines the approximate solution (P1-A) and sets such in the place of a detailed calculation (P1-C) determined with the processor.

    摘要翻译: 一种电子设备和一种利用电子设备执行多个处理的方法,其中,以资源节约的方式可以实现快速响应时间,其中电子设备在操作期间执行第一和第二处理(P1, P2),其中第一过程(P1)可作为近似解(P1-A)和详细计算(P1-C)执行。 电子设备包括用于执行处理(P1,P2)和电子单元或多任务操作系统的处理器。 电子单元包括识别处理器是否活动的部件,并且当处理器处于活动状态并且需要同时执行至少两个进程时,用于执行第一进程(P1),因为它本身, 确定近似解(P1-A)并将其设置在用处理器确定的详细计算(P1-C)的位置。