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    • 2. 发明授权
    • Echo canceller with talk state determination to control speech processor
functional elements in a digital telephone system
    • 具有通话状态确定的回波消除器来控制数字电话系统中的语音处理器功能元件
    • US5920834A
    • 1999-07-06
    • US834397
    • 1997-01-31
    • Gilbert C. SihAnthony P. Mauro
    • Gilbert C. SihAnthony P. Mauro
    • H04M1/60H04B3/20H04B3/23G10L3/02
    • H04B3/23
    • A method and apparatus for controlling various functional elements in a digital telephone system using state determination from an echo canceller. An echo canceller is used to evaluate which one of five talk states two speakers are engaged in during a telephone conversation. This state determination information is used to control a tone detector function, a noise suppressor function, an adaptive equalizer function, a transmission mute function, and a vocoder encoder function within a vocoder. During the talk state where the far-end speaker is active and the near-end speaker is inactive, the echo canceller provides a signal which disables background noise estimates from being performed in the noise suppressor and the vocoder encoder. The same signal is used to disable the tone detector and to enable the transmission mute function during this talk state.
    • 一种使用来自回波消除器的状态确定来控制数字电话系统中的各种功能元件的方法和装置。 回声消除器用于评估在电话交谈期间两个扬声器参与的五个通话状态中的哪一个。 该状态确定信息用于控制声码器内的音调检测器功能,噪声抑制器功能,自适应均衡器功能,传输静音功能和声码器编码器功能。 在远端扬声器有效并且近端扬声器无效的通话状态期间,回声消除器提供禁止在噪声抑制器和声码器编码器中执行背景噪声估计的信号。 相同的信号用于禁用音调检测器,并在此通话状态期间启用传输静音功能。
    • 3. 发明授权
    • Low frequency spectral enhancement system and method
    • 低频谱增强系统和方法
    • US06233549B1
    • 2001-05-15
    • US09199072
    • 1998-11-23
    • Anthony P. MauroGilbert C. Sih
    • Anthony P. MauroGilbert C. Sih
    • G10L1906
    • G10L21/02G10L21/0232
    • A system for enhancing low frequency spectral content of a digitized signal which identifies a fundamental frequency component in the signal and selectively boosts signals within a predetermined range thereof. In the illustrative embodiment, the digitized signal is a frequency domain transformed speech signal. The invention amplifies the low frequency components of the speech signal. The speaker unique fundamental frequency of the speech is computed using pitch delay information and is thus dynamic from frame to frame and also speaker to speaker. This fundamental frequency defines the center point of a gain window which is applied to select frequency components. Only such fundamental frequency components which exhibit a large enough signal to noise ratio have the amplification function applied. Thus, this function can be applied directly following a noise suppression system which has knowledge of the signal quality in each frequency bin. The gain window is ramped up and hanged over to smooth the amplification function between successive frames.
    • 一种用于增强数字化信号的低频谱含量的系统,其识别信号中的基频分量并且选择性地提高其预定范围内的信号。 在说明性实施例中,数字化信号是频域变换的语音信号。 本发明放大语音信号的低频分量。 使用音调延迟信息来计算扬声器独特的基本频率,并且因此是帧间动态的,而扬声器也是扬声器。 该基本频率定义了应用于选择频率分量的增益窗口的中心点。 仅具有足够大的信噪比的基频分量具有应用的放大功能。 因此,该功能可以直接应用于具有每个频率仓中的信号质量知识的噪声抑制系统。 增益窗口上升并挂起,以平滑连续帧之间的放大功能。
    • 4. 发明授权
    • Method and apparatus for achieving crypto-syncronization in a packet data communication system
    • 用于在分组数据通信系统中实现加密同步化的方法和装置
    • US07474749B2
    • 2009-01-06
    • US11349420
    • 2006-02-06
    • Anthony P. Mauro
    • Anthony P. Mauro
    • H04K1/00H04L9/00
    • H04K1/00H04L9/12
    • A method and apparatus for achieving crypto-syncronization in a packet data communication system employing cryptographic communications. In a transmitter, a state vector is incremented at a predetermined rate and is provided to an encryption module. The encryption module uses the state vector to sequentially encrypt the data frames. During periods of frame dropping prior to encryption, the state vector is disabled, thereby allowing for sequential encryption of the data frames. In a receiver, during a frame dropping condition, the state vector is advanced in proportion to the number of frames dropped. During an underflow condition at the receiver, the state vector is disabled for the duration of the underflow condition, and enabled once the underflow condition has passed.
    • 一种在采用加密通信的分组数据通信系统中实现加密同步化的方法和装置。 在发射机中,状态向量以预定速率递增,并被提供给加密模块。 加密模块使用状态向量来顺序加密数据帧。 在加密之前的丢帧期间,状态向量被禁用,从而允许数据帧的顺序加密。 在接收机中,在丢帧条件下,状态向量与丢弃的帧数成比例地提前。 在接收器的下溢条件期间,状态向量在下溢条件的持续时间内被禁用,一旦下溢条件已经过去,状态向量被使能。
    • 5. 发明授权
    • Noise suppression system and method
    • 噪声抑制系统及方法
    • US6122384A
    • 2000-09-19
    • US921492
    • 1997-09-02
    • Anthony P. Mauro
    • Anthony P. Mauro
    • G10L15/20G10L19/24G10L21/0232H04B15/00
    • G10L21/0232G10L19/24
    • A system and method for noise suppression in a speech processing system is presented. A gain estimator determines the gain, and thus the level of noise suppression, for each frame of the input signal. If no speech is present in the frame, then the gain is set at a predetermined minimum. If speech is present in the frame, then a gain factor is determined for each channel of a predefined set of frequency channels. For each channel, the gain factor is a function of the SNR of speech in the channel. The channel SNRs are generated by a SNR estimator based on channel energy estimates provided by an energy estimator and channel noise energy estimates provided by a noise energy estimator. The noise energy estimator updates its estimates during frames in which no speech is present, as determined by a speech detector.
    • 提出了一种用于语音处理系统中噪声抑制的系统和方法。 增益估计器确定输入信号的每个帧的增益,从而确定噪声抑制的电平。 如果帧中没有语音,则将增益设置为预定的最小值。 如果帧中存在语音,则为预定频率信道集合的每个信道确定增益因子。 对于每个通道,增益因子是通道中语音的SNR的函数。 信道SNR由SNR估计器基于由能量估计器提供的信道能量估计和由噪声能量估计器提供的信道噪声能量估计来生成。 噪声能量估计器在没有语音存在的帧期间更新其估计,如由语音检测器确定的。
    • 8. 发明授权
    • Method and apparatus for achieving crypto-synchronization in a packet data communication system
    • 用于在分组数据通信系统中实现加密同步的方法和装置
    • US07003114B1
    • 2006-02-21
    • US09489194
    • 2000-01-20
    • Anthony P. Mauro
    • Anthony P. Mauro
    • H04L9/00
    • H04K1/00H04L9/12
    • A method and apparatus for achieving crypto-syncronization in a packet data communication system employing cryptographic communications. In a transmitter, a state vector is incremented at a predetermined rate and is provided to an encryption module. The encryption module uses the state vector to sequentially encrypt the data frames. During periods of frame dropping prior to encryption, the state vector is disabled, thereby allowing for sequential encryption of the data frames. In a receiver, during a frame dropping condition, the state vector is advanced in proportion to the number of frames dropped. During an underflow condition at the receiver, the state vector is disabled for the duration of the underflow condition, and enabled once the underflow condition has passed.
    • 一种在采用加密通信的分组数据通信系统中实现加密同步化的方法和装置。 在发射机中,状态向量以预定速率递增,并被提供给加密模块。 加密模块使用状态向量来顺序加密数据帧。 在加密之前的丢帧期间,状态向量被禁用,从而允许数据帧的顺序加密。 在接收机中,在丢帧条件下,状态向量与丢弃的帧数成比例地提前。 在接收器的下溢条件期间,状态向量在下溢条件的持续时间内被禁用,一旦下溢条件已经过去,状态向量被使能。
    • 9. 发明授权
    • Associating software with hardware using cryptography
    • 将软件与使用密码学的硬件相关联
    • US08041957B2
    • 2011-10-18
    • US10815256
    • 2004-03-31
    • Oliver MichaelisAnthony P. Mauro
    • Oliver MichaelisAnthony P. Mauro
    • G06F11/30
    • G06F21/121G06F21/51
    • Techniques for associating software with hardware using cryptography are described. The software is identified by a software identifier (ID), and the hardware is identified by a hardware ID. The software is hashed to obtain a code digest. A code signature is generated for the code digest, software ID, and hardware ID. A code image is formed with the software, software ID, code signature, and a certificate. The certificate contains cryptographic information used to authenticate the certificate and validate the code signature. The code image is loaded onto a device. The device validates the software to hardware association prior to executing the software. For the validation, the device authenticates the certificate with a certificate authority public key embedded within the device. The device also validates the code signature using the cryptographic information contained in the certificate, information in the code image, and the hardware ID embedded within the device.
    • 描述了使用密码学将软件与硬件相关联的技术。 该软件由软件标识符(ID)标识,硬件由硬件ID标识。 该软件被散列以获得代码摘要。 为代码摘要,软件ID和硬件ID生成代码签名。 代码图像由软件,软件ID,代码签名和证书组成。 证书包含用于验证证书并验证代码签名的加密信息。 代码图像被加载到设备上。 在执行软件之前,设备会将软件验证为硬件关联。 对于验证,设备使用嵌入设备中的证书颁发机构公钥来验证证书。 设备还使用证书中包含的加密信息,代码映像中的信息和嵌入在设备内的硬件ID来验证代码签名。