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公开(公告)号：US07532257B2
公开(公告)日：2009-05-12
申请号：US11220488
申请日：2005-09-07
IPC分类号： H04N5/455
CPC分类号： H04N5/455 , H04B1/1027 , H04B1/123 , H04B10/85 , H04N9/646 , H04N21/4382 , H04N21/6118
摘要： Base band compensation for an IF stage in a television provides significant advantages over compensation applied to the composite signal. Each base band color difference signal is filtered to obtain cross-talk elements, which are then applied to the opposite channel to eliminate the cross-talk components from the color difference signal channels. The compensation technique is applicable to IF stages generally, including those based on SAW filters. High and low gain compensation of the cross-talk compensated signals may also be performed to reduce distortion in the compensated signals. The base band compensation tends to reduce or eliminate visual artifacts in a television image, especially where sharp contrast transitions occur in the image.
摘要翻译： 电视中的IF级的基带补偿相对于复合信号的补偿提供了显着的优点。 对每个基带色差信号进行滤波以获得串扰元件，然后将它们应用于相反的通道以消除色差信号通道中的串扰分量。 补偿技术一般适用于IF级，包括基于SAW滤波器的IF级。 也可以执行串扰补偿信号的高和低增益补偿以减少补偿信号中的失真。 基带补偿趋向于减少或消除电视图像中的视觉伪影，特别是在图像中发生尖锐的对比度转换时。
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公开(公告)号：US07468763B2
公开(公告)日：2008-12-23
申请号：US11199661
申请日：2005-08-09
申请人： Feng Ying , Karl Hertzian Renner , Weider Peter Chang , Shereef Shehata , Viet Dinh , Xiaodong Wu , Walter Heinrich Demmer
发明人： Feng Ying , Karl Hertzian Renner , Weider Peter Chang , Shereef Shehata , Viet Dinh , Xiaodong Wu , Walter Heinrich Demmer
CPC分类号： H04H40/45
摘要： System and method for an all-digital audio receiver for a BTSC MTS audio signal or other composite signal that is FM modulated. A preferred embodiment comprises a digital FM demodulator for receiving an analog to digital quantized SIF signal and performing demodulation and outputting a composite audio signal, and a digital audio processor for decomposing the composite audio signal into at least the SAP, stereo and monaural signals for audio reproduction. In a preferred embodiment, the digital audio processor is a programmable digital signal processor. In a preferred embodiment, the digital FM demodulator and the digital audio processor are implemented as an integrated circuit. Methods for processing the audio signal using the digital processors of the invention are provided.
摘要翻译： 用于BTSC MTS音频信号或FM调制的其他复合信号的全数字音频接收机的系统和方法。 优选实施例包括用于接收模数数字量化SIF信号并执行解调和输出复合音频信号的数字FM解调器，以及用于将复合音频信号分解为至少SAP，用于音频的立体声和单声道信号的数字音频处理器 再生产。 在优选实施例中，数字音频处理器是可编程数字信号处理器。 在优选实施例中，数字FM解调器和数字音频处理器被实现为集成电路。 提供了使用本发明的数字处理器来处理音频信号的方法。
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公开(公告)号：US07511769B2
公开(公告)日：2009-03-31
申请号：US11109290
申请日：2005-04-19
摘要： A system to reduce noise includes a noise measurement device that provides a measure of noise associated with a digital input video signal. A noise reduction filter provides a noise-reduced digital output video signal corresponding to the luma and chroma of the digital input video signal. The noise reduction filter has a parameter that varies on a pixel basis for the component of the digital input video signal as a function of the measure of noise. The range and sensitivity of the noise reduction can be user programmable.
摘要翻译： 降低噪声的系统包括提供与数字输入视频信号相关联的噪声测量的噪声测量装置。 噪声降低滤波器提供对应于数字输入视频信号的亮度和色度的噪声降低的数字输出视频信号。 噪声降低滤波器具有作为噪声测量的函数的数字输入视频信号的分量基于像素变化的参数。 降噪的范围和灵敏度可以由用户编程。
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