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    • 45. 发明公开
    • 근장 벡터 신호 개선
    • 近场矢量信号增强
    • KR1020090113833A
    • 2009-11-02
    • KR1020097015262
    • 2007-12-19
    • 돌비 레버러토리즈 라이쎈싱 코오포레이션
    • 틴저,존,씨
    • G10L21/0208G06F3/16G06F17/14
    • H04R3/005H04R1/1091H04R25/405H04R25/407H04R2201/403H04R2410/05H04R2410/07
    • Near-field sensing of wave signals, for example for application in headsets and earsets, is accomplished by placing two or more spaced-apart microphones along a line generally between the headset and the user's mouth. The signals produced at the output of the microphones will disagree in amplitude and time delay for the desired signal-the wearer's voice-but will disagree in a different manner for the ambient noises. Utilization of this difference enables recognizing, and subsequently ignoring, the noise portion of the signals and passing a clean voice signal. A first approach involves a complex vector difference equation applied in the frequency domain that creates a noise-reduced result. A second approach creates an attenuation value that is proportional to the complex vector difference, and applies this attenuation value to the original signal in order to effect a reduction of the noise. The two approaches can be applied separately or combined.
    • 例如用于耳机和耳机中的波信号的近场感测通过沿着通常在耳机和用户嘴部之间的线路放置两个或更多个间隔开的麦克风来实现。 在麦克风的输出处产生的信号对于期望的信号(佩戴者的声音)的幅度和时间延迟将不同,但是对于环境噪声将以不同的方式不同意。 利用这种差异使得能够识别和随后忽略信号的噪声部分并传递干净的语音信号。 第一种方法涉及应用在频域中的复矢量差分方程,其产生噪声减小的结果。 第二种方法产生与复矢量差成比例的衰减值,并将该衰减值应用于原始信号,以便降低噪声。 这两种方法可以单独应用或组合使用。
    • 47. 发明公开
    • 바람소리를 레벨에 따라 자동으로 제거하는 영상기기 및그의 바람소리 레벨별 자동제거방법
    • 用于根据风噪声水平自动去除风噪声的AV设备及其方法
    • KR1020070060722A
    • 2007-06-13
    • KR1020050120682
    • 2005-12-09
    • 삼성전자주식회사
    • 이무순
    • H04R3/02H04R1/04
    • H04R3/02H04R1/04H04R2410/07
    • A video device and a method for automatically removing a wind noise according to a level are provided to automatically remove a wind noise according to a detected level by installing a specific circuit to detect the level of the wind noise. A video device for automatically removing a wind noise according to a level includes a low pass filter(130), a wind noise level detection unit(140), a MICOM(150), and a high pass filter(160). The low pass filter(130) filters a wind noise signal of transmitted signals. The wind noise level detection unit(140) converts the wind noise signal into a predetermined level detection signal by measuring the level of the filtered wind noise signal. The MICOM(150) generates a control signal corresponding to the detection signal. The high pass filter(160) removes the wind noise according to the generated control signal. The low pass filter unit(130) filters the wind noise signal of the signals transmitted through a micro amplifier which is installed to remove the wind noise.
    • 提供根据电平自动去除风噪声的视频设备和方法,以通过安装特定电路来检测风噪声的水平,根据检测到的水平来自动去除风噪声。 用于根据电平自动去除风噪声的视频装置包括低通滤波器(130),风噪声电平检测单元(140),MICOM(150)和高通滤波器(160)。 低通滤波器(130)对发射信号的风噪声信号进行滤波。 风噪声水平检测单元(140)通过测量滤波后的风噪声信号的电平将风噪声信号转换成预定电平检测信号。 MICOM(150)产生对应于检测信号的控制信号。 高通滤波器(160)根据产生的控制信号去除风噪声。 低通滤波器单元(130)对通过安装以消除风噪声的微放大器传输的信号的风噪声信号进行滤波。
    • 48. 发明公开
    • 자동 풍음 저감 회로 및 자동 풍음 저감 방법
    • 自动降噪电路和自动降噪方法
    • KR1020050048616A
    • 2005-05-24
    • KR1020057002809
    • 2003-08-19
    • 소니 주식회사
    • 오자와,가즈히꼬
    • H04R3/00G10L21/02
    • H04R3/005H04R2410/07G10L21/0202H04R2499/11
    • For multi-channelization of an audio signal, there are provided an automatic wind noise reduction circuit and an automatic wind noise reduction method capable of enhancing the performance and degree of freedom of system design. Calculators (26, 27, 28) obtain addition signals of an audio signal for audio channels other than audio channels selected differently. Calculators (29, 30, 31) subtract addition signals from the corresponding calculators (26, 27, 28) from the audio signals of the selected audio channels. The subtraction signals from the calculators (29, 30, 31) are band-limited to a frequency band of a wind noise signal by LPF (21, 23, 25). The subtraction signals from the calculators (29, 30, 31) which have been band-limited are subjected to level control by level variable amplifiers (32, 33, 34) and they are subtracted from the audio signals of the corresponding audio channels.
    • 为了音频信号的多通道化,提供了能够提高系统设计的性能和自由度的自动降噪电路和自动降噪方法。 计算器(26,27,28)获得音频信号的加法信号,该音频信号除了不同地选择的音频信道之外的音频信道。 计算器(29,30,31)从所选择的音频通道的音频信号中减去相应的计算器(26,27,28)的相加信号。 来自计算器(29,30,31)的减法信号通过LPF(21,23,25)被频带限制到风噪声信号的频带。 来自已经被频带限制的计算器(29,30,31)的减法信号由电平可变放大器(32,33,34)进行电平控制,并从对应的音频通道的音频信号中减去它们。