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    • 81. 发明申请
    • Apparatus and methods for improving detection of watermarks in content that has undergone a lossy transformation
    • 用于改善经历有损变换的内容中水印检测的装置和方法
    • US20050025338A1
    • 2005-02-03
    • US10923946
    • 2004-08-23
    • Jian ZhaoJustin PicardNiels Thorwirth
    • Jian ZhaoJustin PicardNiels Thorwirth
    • B41J5/30G06K9/00G06T1/00G06T7/00G07D7/12G07D7/20H04N1/387
    • G06T1/0028G06T1/005G06T2201/0065G06T2201/0081G07D7/0032G07D7/20
    • Techniques for improving detection of watermarks in content that has undergone a lossy transformation. One of the techniques is used when the message that is contained in a watermark belonging to a digital representation that is derived from an original watermarked digital representation cannot be decoded. The technique obtains information about the watermark by comparing the watermark vector for the watermark that cannot be decoded with a replica of the watermark vector from the original watermarked digital representation. The replica is made using the message. Depending on the degree of similarity, the watermark's presence and some of its characteristics may be determined. Another technique improves the robustness of watermarks that are used for authentication by employing a short (even single-bit) watermark vector to make the watermark and using the message needed for the authentication to determine where the watermark is located in the digital representation. Authentication of a digital representation is done by determining whether the watermark is present in the digital representation. In another technique, detection of the presence of a watermark is used to determine what areas of a digital representation have been subject to alteration. Techniques for synchronizing digital representations for watermark detection and other purposes include adding marks whose locations can be automatically detected only with the help of information that is external to the digital representation, such as a key, and adding marks to a sequence of digital representations and detecting the marks by summing the sequence.
    • 用于改进内容中经过有损变换的水印检测技术。 当包含在属于从原始水印数字表示导出的数字表示的水印中的消息不能被解码时,使用其中一种技术。 该技术通过将不能解码的水印的水印向量​​与来自原始水印数字表示的水印矢量的副本进行比较来获得关于水印的信息。 副本是使用消息。 根据相似度,可以确定水印的存在和其一些特征。 另一种技术通过采用短(甚至单位)水印向量来制作水印并使用认证所需的消息来确定水印在数字表示中的位置,从而提高了用于认证的水印的鲁棒性。 通过确定水印是否存在于数字表示中来完成数字表示的认证。 在另一种技术中,使用检测水印的存在来确定数字表示的哪些区域已被改变。 用于水印检测和其他目的的用于同步数字表示的技术包括添加标记,其位置可以仅借助于数字表示外部的信息(例如键)自动检测,并将标记添加到数字表示序列和检测 通过对序列进行求和来标记。
    • 84. 发明授权
    • Speech enhancing method and device, and denoising communication headphone enhancing method and device, and denoising communication headphones
    • 语音增强方法和设备,以及去噪通信耳机增强方法和设备,以及去噪通信耳机
    • US09240195B2
    • 2016-01-19
    • US13637715
    • 2011-11-25
    • Jian ZhaoSong LiuBo LiYang Hua
    • Jian ZhaoSong LiuBo LiYang Hua
    • G10L21/00G10L21/0208H04R3/00G10L21/0216H04R1/08
    • G10L21/0208G10L2021/02165H04R1/083H04R3/005H04R2201/107H04R2410/05
    • The present invention discloses a speech enhancing method, a speech enhancing device and a denoising communication headphone. In the solutions of the present invention, a first sound signal that comprises a user's speech signal transmitted through coupling vibration and an ambient noise signal transmitted through the air and a second sound signal that is mainly an ambient noise signal transmitted through the air are picked up by a primary vibration microphone and a secondary vibration microphone, respectively, that have a specific relative positional relationship therebetween, and the ambient noise signals picked up by the two vibration microphones are correlated with each other; a control parameter used to control an updating speed of an adaptive filter is determined according to the first sound signal and the second sound signal; the first sound signal is denoised and filtered according to the second sound signal and the control parameter; and the denoised and filtered speech signal is further denoised and speech high-frequency enhancement is performed thereon. The technical solutions of the present invention can effectively improve the signal to noise ratio (SNR) and the quality of speech in an environment of highly intense noises.
    • 本发明公开了一种语音增强方法,语音增强装置和去噪通信耳机。 在本发明的解决方案中,拾取包括通过耦合振动发送的用户语音信号和通过空气传输的环境噪声信号的第一声音信号和主要通过空气传输的环境噪声信号的第二声音信号 通过分别具有特定相对位置关系的主振动麦克风和二次振动麦克风,并且由两个振动麦克风拾取的环境噪声信号彼此相关; 根据第一声音信号和第二声音信号确定用于控制自适应滤波器的更新速度的控制参数; 根据第二声音信号和控制参数对第一声音信号进行去噪和滤波; 并且去噪和滤波的语音信号被进一步去噪,并且在其上执行语音高频增强。 本发明的技术方案可以在高度强烈的噪声环境中有效提高信噪比(SNR)和语音质量。