公开(公告)号：US6134373A

公开(公告)日：2000-10-17

申请号：US787690

申请日：1991-11-04

申请人： Christopher H. Strolle ,  Chandrakant B. Patel ,  Werner F. Wedam ,  Jung Wan Ko ,  Raymond Schnitzler ,  Jong Kyung Yun

发明人： Christopher H. Strolle ,  Chandrakant B. Patel ,  Werner F. Wedam ,  Jung Wan Ko ,  Raymond Schnitzler ,  Jong Kyung Yun

IPC分类号： H04N5/93 ,  H04N9/78 ,  H04N9/797 ,  H04N9/80 ,  H04N9/82 ,  H04N9/83 ,  H04N9/835 ,  H04N9/84 ,  H04N9/898 ,  H04N9/79

CPC分类号： H04N9/831 ,  H04N9/797 ,  H04N9/7976 ,  H04N9/80 ,  H04N9/8205 ,  H04N9/835 ,  H04N9/84 ,  H04N9/898

摘要： An encoder separates luminance and chrominance signal components of a composite video signal. The frame-to-frame changes in the luminance signal are detected, and a motion signal is derived therefrom. The higher frequency portion of the luminance signal is adaptively de-emphasized in amplitude and folded into the spectrum of the lower frequency portion of the luminance signal, to generate a folded-spectrum luminance signal for modulating the frequency of a luma carrier. In a combined signal, suitable for magnetic recording in accordance with a modified VHS standard, the chrominance signal is translated in frequency to generate a color-under signal in a frequency band below that occupied by the FM luma carrier. The de-emphasized higher frequency portion of the luminance signal, as folded into its lower frequency portion, and encoding of the motion signal onto vacant portions of the frequency band below that occupied by the FM luma carrier in such a magnetic recording facilitate its being compatibly reproduced by conventional VHS reproduction devices. In a wideband reproduction device a decoder demodulates the folded-spectrum luminance signal from the FM luma carrier, unfolds the lumininance signal, and reemphasizes the high frequencies of the unfolded luminance signal. The color-under signal is translated in frequency to regenerate chrominance signal combined with the unfolded luminance signal with its high frequencies re-emphasized to their original amplitude, regenerating a composite signal descriptive of a full bandwidth image. The motion signal is utilized in the encoder for motion-adaptively pre-filtering the input luminance and is recovered in the decoder for motion-adaptively post-filtering the unfolded luminance.

摘要翻译： 编码器分离复合视频信号的亮度和色度信号分量。 检测亮度信号中的帧到帧的变化，并从中导出运动信号。 亮度信号的较高频率部分在幅度上自适应去强调，并折射成亮度信号的较低频率部分的频谱，以产生用于调制亮度载波频率的折射谱亮度信号。 在适合于根据修改的VHS标准的磁记录的组合信号中，色度信号被频率转换，以在低于由FM亮度载波占据的频带内产生下色信号。 亮度信号的去加重的较高频率部分被折叠成其较低频率部分，并且将运动信号编码到在这种磁记录中由FM亮度载波占据的频带以下的频带的空的部分上，便于其兼容 由常规VHS再现设备再现。 在宽带再现装置中，解码器解调来自FM亮度载波的折叠频谱亮度信号，展开亮度信号，并重新强调展开的亮度信号的高频。 彩色信号以频率转换以再现与展开的亮度信号组合的色度信号，其高频被再次强调到其原始幅度，再生描述全带宽图像的复合信号。 运动信号在编码器中用于对输入亮度进行运动自适应预滤波，并在解码器中恢复运动自适应地对展开后的亮度进行后置滤波。

公开(公告)号：US06246827B1

公开(公告)日：2001-06-12

申请号：US08087362

申请日：1993-07-08

申请人： Christopher H. Strolle ,  Allen LeRoy Limberg ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung Wan Ko ,  Jong Kyung Yun

发明人： Christopher H. Strolle ,  Allen LeRoy Limberg ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung Wan Ko ,  Jong Kyung Yun

IPC分类号： H04N979

CPC分类号： H04N5/923 ,  H04N9/7976 ,  H04N9/80 ,  H04N9/8205 ,  H04N9/835 ,  H04N9/898

摘要： A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.

摘要翻译： 一种用于从包含先前记录的亮度信号的介质再现亮度信号的系统，其中其高频部分在动态范围内被压缩，包括用于从介质中恢复该亮度信号的电路。 完成滤波以将恢复的亮度信号的低频和压缩在动态范围的高频部分彼此分离。 核心部分对恢复的亮度信号的分离压缩在动态范围高频部分进行响应，以提供具有扩展的动态范围和降低的噪声的核心高频部分。 然后将具有扩大的动态范围和降低的噪声的核心高频部分的电平提升预定量，以补偿在动态范围的压缩期间的能量损失，并将其恢复到恢复的亮度信号的低频部分， 再现具有用于高频的至少部分恢复的动态范围的全频带亮度信号，并且没有容易看到的高频噪声。

公开(公告)号：US5673355A

公开(公告)日：1997-09-30

申请号：US484707

申请日：1995-06-07

申请人： Christopher H. Strolle ,  Allen LeRoy Limberg ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung Wan Ko ,  Jong Kyung Yun

发明人： Christopher H. Strolle ,  Allen LeRoy Limberg ,  Werner F. Wedam ,  Raymond Schnitzler ,  Hermann J. Weckenbrock ,  Jung Wan Ko ,  Jong Kyung Yun

IPC分类号： H04N5/923 ,  H04N9/797 ,  H04N9/80 ,  H04N9/82 ,  H04N9/835 ,  H04N9/898 ,  H04N9/79

CPC分类号： H04N9/8205 ,  H04N5/923 ,  H04N9/7976 ,  H04N9/80 ,  H04N9/835 ,  H04N9/898

摘要： A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.

摘要翻译： 一种用于从包含先前记录的亮度信号的介质再现亮度信号的系统，其中其高频部分在动态范围内被压缩，包括用于从介质中恢复该亮度信号的电路。 完成滤波以将恢复的亮度信号的低频和压缩在动态范围的高频部分彼此分离。 核心部分对恢复的亮度信号的分离压缩在动态范围高频部分进行响应，以提供具有扩展的动态范围和降低的噪声的核心高频部分。 然后将具有扩大的动态范围和降低的噪声的核心高频部分的电平提升预定量，以补偿在动态范围的压缩期间的能量损失，并将其恢复到恢复的亮度信号的低频部分， 再现具有用于高频的至少部分恢复的动态范围的全频带亮度信号，并且没有容易看到的高频噪声。