公开(公告)号：US6084639A

公开(公告)日：2000-07-04

申请号：US628935

申请日：1996-04-08

申请人： Hiroyuki Fukuoka ,  Hiroyuki Takimoto ,  Taizo Hori ,  Takashi Kobayashi ,  Yoshihiro Nakatani ,  Jun Makino ,  Shinichi Koyama

发明人： Hiroyuki Fukuoka ,  Hiroyuki Takimoto ,  Taizo Hori ,  Takashi Kobayashi ,  Yoshihiro Nakatani ,  Jun Makino ,  Shinichi Koyama

IPC分类号： H04N5/445 ,  H04N5/922 ,  H04N5/93 ,  H04N7/08 ,  H04N9/79 ,  H04N9/80 ,  H04N9/802 ,  H04N9/83 ,  H04N21/47 ,  H04N5/46

CPC分类号： H04N7/0122 ,  H04N7/08 ,  H04N9/7921 ,  H04N9/832 ,  H04N21/47 ,  H04N5/445 ,  H04N9/7925

摘要： There is provided an image processing apparatus which comprises an inputting part for inputting an image signal, an attenuating part for attenuating a predetermined frequency portion of the image signal inputted by the inputting part, and a controlling part for controlling an attenuation characteristic of the attenuating part for attenuating the predetermined frequency portion, in accordance with a compression ratio of the image signal inputted by the inputting part. There is also provided an image processing apparatus which comprises an inputting part for inputting an image signal, an enhancing part for enhancing a high frequency band of the image signal inputted by the inputting part, and a controlling part for controlling a high-frequency-band enhancement characteristic of the enhancing part in accordance with a compression ratio of the image signal inputted by the inputting part. There is also provided an image processing apparatus which comprises an inputting part for inputting an image signal, a discriminating part for making a discrimination as to a particular attribute of the image signal inputted by the inputting part, a generating part for generating an attribute signal indicating that the image signal inputted by the inputting part represents an image having the particular attribute, in accordance with an output of the discriminating part, and a combining part for combining an output of the generating part with the image signal.

摘要翻译： 提供一种图像处理装置，其包括用于输入图像信号的输入部分，用于衰减由输入部分输入的图像信号的预定频率部分的衰减部分，以及用于控制衰减部分的衰减特性的控制部分 用于根据由输入部分输入的图像信号的压缩比来衰减预定频率部分。 还提供了一种图像处理装置，其包括用于输入图像信号的输入部分，用于增强由输入部分输入的图像信号的高频带的增强部分，以及用于控制高频带 根据由输入部输入的图像信号的压缩率，增强部分的增强特性。 还提供了一种图像处理装置，其包括用于输入图像信号的输入部分，用于对由输入部分输入的图像信号的特定属性进行鉴别的鉴别部分，用于产生指示 由输入部分输入的图像信号根据识别部分的输出表示具有特定属性的图像，以及用于将生成部分的输出与图像信号组合的合成部分。

公开(公告)号：US5956098A

公开(公告)日：1999-09-21

申请号：US695507

申请日：1996-08-12

申请人： Hiroyuki Mizukami ,  Yutaka Igarashi ,  Toshio Nagashima

发明人： Hiroyuki Mizukami ,  Yutaka Igarashi ,  Toshio Nagashima

IPC分类号： H04N5/44 ,  H04N5/52 ,  H04N5/922 ,  H04N11/00 ,  H04N5/46

CPC分类号： H04N5/4446 ,  H04N5/4401 ,  H04N11/002 ,  H04N5/52

摘要： To make it possible to receive a modulated signal which is obtained by suppressing a carrier signal such as a high definition TV signal which is digitally demodulated such as QAM (quadrature amplitude modulation), a receiver of the double super-heterodyne system having the first and second mixers 9 and 13 is a basic constitution. A band pass filter having a flatness in pass band and a small deviation of group delay which will prevent the demodulation of a high definition TV signal from degradation is used a first intermediate frequency filter 11. An SAW filter is used as a second intermediate frequency filter 16. The third mixer 28 for converting a second intermediate frequency signal to a third intermediate frequency signal in frequency is installed and the frequency of the third intermediate frequency signal to be converted is set to a value lower than the frequency of the second intermediate frequency signal. The demodulator 33 for a high definition TV signal is installed so as to demodulate a high definition TV signal included in the third intermediate frequency signal.

摘要翻译： 为了能够接收通过抑制诸如QAM（正交幅度调制）等数字解调的高分辨率TV信号的载波信号获得的调制信号，具有第一和第二超外差系统的接收机 第二混合器9和13是基本构成。 使用具有通带平坦度的带通滤波器和防止高分辨率TV信号的解调降低的群延迟的小偏差，第一中频滤波器11.使用SAW滤波器作为第二中频滤波器 安装用于将第二中频信号转换为频率的第三中频信号的第三混频器28，将要转换的第三中频信号的频率设置为低于第二中频信号的频率 。 用于高清晰度电视信号的解调器33被安装成解调包括在第三中频信号中的高分辨率TV信号。

公开(公告)号：US5768292A

公开(公告)日：1998-06-16

申请号：US548768

申请日：1995-10-26

申请人： David E. Galbi

发明人： David E. Galbi

IPC分类号： H04N5/922 ,  G06T9/00 ,  G10L19/00 ,  G10L19/02 ,  G11B20/10 ,  H03M7/00 ,  H03M7/42 ,  H04N5/21 ,  H04N5/44 ,  H04N5/60 ,  H04N5/92 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50 ,  H04N7/52 ,  H04N21/2368 ,  H04N21/434 ,  H04L1/00

CPC分类号： H04N19/00 ,  G10L19/02 ,  H03M7/425 ,  H04N19/126 ,  H04N19/42 ,  H04N19/423 ,  H04N19/43 ,  H04N19/433 ,  H04N19/436 ,  H04N19/439 ,  H04N19/44 ,  H04N19/60 ,  H04N19/61 ,  H04N19/63 ,  H04N19/90 ,  H04N21/4341 ,  H04N5/4401 ,  H04N5/602 ,  G09G2340/02 ,  G10L19/005 ,  H04N19/124 ,  H04N19/13 ,  H04N19/70 ,  H04N19/91 ,  H04N5/21

摘要： In response to an error signal from a source of an MPEG audio data stream, a decoder replaces data with an error code and temporarily enables error handling. The error code is a valid bit combination rarely found in MPEG audio data frames. During audio decoding with error handling enabled, the decoder checks for the error code and replaces the error code with reconstructed data. Typically, some subband data are replaced with zeros so that an error only changes some of the frequency components.

摘要翻译： 响应于来自MPEG音频数据流的源的错误信号，解码器用错误代码替换数据并暂时使能错误处理。 错误代码是很少在MPEG音频数据帧中找到的有效位组合。 在启用错误处理的音频解码期间，解码器检查错误代码，并用重建的数据替换错误代码。 通常，一些子带数据被替换为零，使得错误仅改变一些频率分量。

公开(公告)号：US5715351A

公开(公告)日：1998-02-03

申请号：US625036

申请日：1996-03-29

申请人： Sumio Tanaka

发明人： Sumio Tanaka

IPC分类号： G11B5/86 ,  G11B20/02 ,  G11B27/024 ,  H04N5/765 ,  H04N5/922 ,  H04N9/79

CPC分类号： H04N5/765 ,  G11B27/024 ,  G11B5/86 ,  H04N9/79 ,  G11B2220/455 ,  G11B2220/90 ,  G11B2220/91

摘要： An video signal processing circuit of a double deck VCR capable of preventing a deterioration of picture when dubbing, which includes a reproducing video cassette tape recorder and a recording video cassette tape recorder disposed in a single body, wherein the reproducing VCR transmits a luminance signal and a chrominance signal, respectively, to the recording VCR and includes a luminance reproduction processing circuit generating a high band detection signal to be transmitted to the recording VCR, and the recording VCR includes a first switch for switching an input signal and an output signal of a low pass filter for luminance signal in response to the high band detection signal so that the output of the low pass filter is outputted to a luminance signal recording processing circuit when a high band signal is detected and the input of the low pass filter is outputted when the high band signal is not detected, and a second switch for switching an input signal and an output signal of a band pass filter in response to the high band detection signal so that the output of the band pass filter is outputted to a color signal recorder processing circuit when the high band signal is detected and the input of the band pass filter is outputted to the color signal recording processing circuit when the high band detection signal is not detected.

摘要翻译： 一种双层VCR的视频信号处理电路，其能够防止在配音时图像劣化，其包括重放盒式磁带录像机和设置在单体中的记录盒式磁带录像机，其中再现VCR传输亮度信号和 色度信号分别提供给记录VCR，并且包括产生要传输到记录VCR的高频带检测信号的亮度再现处理电路，并且记录VCR包括用于切换输入信号的第一开关和 低通滤波器，用于响应于高频带检测信号的亮度信号，使得当检测到高频带信号时低通滤波器的输出被输出到亮度信号记录处理电路，并且输出低通滤波器， 没有检测到高频带信号，以及用于切换输入信号和a的输出信号的第二开关 带通滤波器响应于高频带检测信号，使得当检测到高频带信号并且带通滤波器的输入被输出到彩色信号时，带通滤波器的输出被输出到彩色信号记录器处理电路 当没有检测到高频带检测信号时，记录处理电路。

公开(公告)号：US5592132A

公开(公告)日：1997-01-07

申请号：US433666

申请日：1995-05-04

申请人： Holger Ernst ,  Holger Moll

发明人： Holger Ernst ,  Holger Moll

IPC分类号： H03C3/09 ,  H04N5/922 ,  H04N9/80 ,  H04N9/83 ,  H03C3/00 ,  G11B20/06 ,  H03C3/08

CPC分类号： H03C3/0966 ,  H04N9/80

摘要： In a frequency modulator (1) having an adjusting circuit by which frequency modulator an applied luminance signal of a color video signal that contains synchronization pulses is frequency modulated, while the chrominance signal of the color video signal is modulated on a carrier, that has a quiescent frequency if no color information is available. A capacitor is provided for an automatic mode of operation, and is charged or discharged, respectively, in dependence on the period duration of the modulator output signal and in dependence on the period duration of the quiescent frequency of the chrominance carrier. The steepness of the voltage/frequency characteristic curve of the modulator is set dependent upon the charge condition of the capacitor, while the charging-to-discharging ratio is selected such that the charge of the capacitor is maintained constant on average, if the modulator frequency is equal to a predefined nominal frequency and increases or decreases, respectively, if the modulator frequency falls short of or exceeds the nominal frequency during the synchronization pulses.

摘要翻译： 在具有调制电路的频率调制器（1）中，通过该调整电路，调频电路包含同步脉冲的彩色视频信号的施加亮度信号被调频，而彩色视频信号的色度信号在载波上被调制， 静态频率，如果没有颜色信息可用。 提供了一种用于自动操作模式的电容器，并且根据调制器输出信号的周期持续时间并根据色度载波的静态频率的周期持续时间分别进行充电或放电。 调制器的电压/频率特性曲线的陡度取决于电容器的充电条件，而放电比例选择使得电容器的电荷平均保持恒定，如果调制器频率 如果在同步脉冲期间调制器频率低于或超过标称频率，则等于预定义的标称频率并分别增加或减小。

公开(公告)号：US5534943A

公开(公告)日：1996-07-09

申请号：US160873

申请日：1993-12-03

申请人： Myoungchun Hwang

发明人： Myoungchun Hwang

IPC分类号： H03C3/00 ,  H03C3/09 ,  H03K3/0231 ,  H03L7/099 ,  H04N5/92 ,  H04N5/922 ,  H04N5/40

CPC分类号： H03L7/099 ,  H03C3/0908 ,  H03K3/0231 ,  H03L7/0805 ,  H04N5/92

摘要： A frequency modulating system for frequency-modulating an input signal with a predetermined carrier frequency comprising a controller circuit and a frequency modulator. The controller circuit includes an automatic frequency detecting circuit, a voltage controlled oscillator, an error current generator, a feedback clamping circuit, a deviation current generator, and an adder circuit generating a frequency deviation/carrier frequency correction signal provided to the frequency modulator. The frequency modulator modulates the frequency in response to an output of the controller circuit and includes an oscillator having the same structure as that of the voltage control oscillator.

摘要翻译： 一种频率调制系统，用于对包含控制器电路和频率调制器的预定载波频率调制输入信号进行频率调制。 控制器电路包括自动频率检测电路，压控振荡器，误差电流发生器，反馈钳位电路，偏差电流发生器和产生提供给频率调制器的频率偏差/载波频率校正信号的加法器电路。 频率调制器响应于控制器电路的输出调制频率，并且包括具有与压控振荡器相同结构的振荡器。

公开(公告)号：US5493341A

公开(公告)日：1996-02-20

申请号：US218935

申请日：1994-03-29

申请人： Seok-hoon Nam

发明人： Seok-hoon Nam

IPC分类号： H03H17/02 ,  H04B1/62 ,  H04N5/16 ,  H04N5/922 ,  H04N5/923 ,  H04N5/93

CPC分类号： H04N5/923

摘要： A digital non-linear pre-emphasis/de-emphasis apparatus includes a first filter for multiplying an input signal by a first coefficient varying non-linearly according to the amplitude of the input signal, to thereby change the gain of the input signal, and a second filter for multiplying the gain-altered input signal by a second non-linear coefficient according to the gain value of the input signal to thereby change its passband with respect to the input signal. The apparatus changes the frequency response characteristic according to the input signal amplitude and obtains an emphasis amount. Furthermore, the apparatus selectively adds or subtracts the input signal and the emphasis amount according to a received record or reproduction mode signal, to thereby increase the S/N ratio of a VCR system and enhance the stability thereof.

摘要翻译： 数字非线性预加重/去加重装置包括：第一滤波器，用于将输入信号乘以根据输入信号的振幅非线性变化的第一系数，从而改变输入信号的增益;以及 第二滤波器，用于根据输入信号的增益值将增益改变的输入信号乘以第二非线性系数，从而相对于输入信号改变其通带。 该装置根据输入信号幅度改变频率响应特性并获得强调量。 此外，该装置根据接收的记录或再现模式信号选择性地增加或减少输入信号和强调量，从而增加VCR系统的S / N比并提高其稳定性。

公开(公告)号：US5467141A

公开(公告)日：1995-11-14

申请号：US129037

申请日：1993-10-12

申请人： Peter J. Ligertwood

发明人： Peter J. Ligertwood

IPC分类号： G01R19/165 ,  H03K5/19 ,  H04N5/40 ,  H04N5/922 ,  H04N9/797 ,  H04N9/80

CPC分类号： H03K5/19 ,  G01R19/16566 ,  H04N5/40 ,  H04N9/7973 ,  H04N9/80

摘要： This invention relates to a modulator circuit (2) for a video system such as a VCR. The modulator circuit (2) is selectably operable in any one of a plurality of modes of operation in order to comply with the operating standard of the video system. The modulator circuit comprises oscillator circuit (4, 10) for generating a carrier signal having a selectably variable frequency, and a modulating circuit (3) coupled to receive the carrier signal and having an audio input (24) for receiving an audio signal and a video input (26) for receiving a video signal, the modulating circuit using the video and audio signals to generate a modulated output signal on the carrier signal, the generation of the modulated output signal depending on selectably variable operating parameters of the modulating circuit. The modulator circuit further comprises control circuit (5, 6, 20) coupled to the oscillator circuit (4, 10) and to the modulating circuit (3), for receiving a mode select signal (SCL, SDA) and for selecting the frequency of the carrier signal and for selecting predetermined values for the variable operating parameters of the modulating circuit in dependence on the mode select signal whereby the modulated output signal is generated in accordance with one of the plurality of modes of operation.

摘要翻译： PCT No.PCT / EP93 / 00391 Sec。 371日期：1993年10月12日 102（e）日期1993年10月12日PCT 1993年2月18日提交PCT公布。 第WO93 / 17522号公报 日期：1993年9月2日。本发明涉及一种用于诸如VCR的视频系统的调制器电路（2）。 调制器电路（2）可选择地以多种操作模式中的任何一种工作，以便符合视频系统的操作标准。 调制器电路包括用于产生具有可选择可变频率的载波信号的振荡器电路（4,10）和耦合以接收载波信号并具有用于接收音频信号的音频输入（24）的调制电路（3） 用于接收视频信号的视频输入（26），调制电路使用视频和音频信号在载波信号上产生调制输出信号，根据调制电路的可选择的可变运行参数产生调制输出信号。 调制器电路还包括耦合到振荡器电路（4,10）和调制电路（3）的控制电路（5,6,20），用于接收模式选择信号（SCL，SDA）并用于选择频率 载波信号，并且用于根据模式选择信号选择调制电路的可变工作参数的预定值，从而根据多种操作模式之一生成调制输出信号。

公开(公告)号：US5220427A

公开(公告)日：1993-06-15

申请号：US422884

申请日：1989-10-19

申请人： Seiichi Mikami

发明人： Seiichi Mikami

IPC分类号： H04N5/922 ,  G11B20/06 ,  H03D3/00 ,  H03G11/06 ,  H04N5/93 ,  H04N5/931

CPC分类号： H04N5/9315 ,  H04N5/93

摘要： A magnetic reproducing apparatus wherein reversal of white peak is reduced in the luminance signal reproducing system. This magnetic reproducing apparatus includes a negative feedback circuit for applying a negative feedback to an input FM signal obtained by reproducing a magnetic recording, and a demodulation circuit responsive to an FM signal outputted from the negative feedback circuit to demodulate it, thus to provide a reproduced luminance signal. The negative feedback circuit includes an amplifier circuit having a non-inverting input terminal to which FM signal or a signal corresponding thereto is delivered, a first limiter circuit for applying amplitude limiting to the output signal from the amplifier circuit, and a delay circuit for delivering, to the amplifier circuit, a delay signal which lags the amplitude limited signal from the first limiter circuit by a phase angle of 90 degrees in the carrier frequency band of the FM signal.

公开(公告)号：US5187576A

公开(公告)日：1993-02-16

申请号：US691787

申请日：1991-04-26

申请人： Il-gu Na

发明人： Il-gu Na

IPC分类号： G11B20/02 ,  G11B20/06 ,  H04N5/91 ,  H04N5/922 ,  H04N7/06

CPC分类号： H04N7/06

摘要： Disclosed is a stereo RF modulating system which converts stereo information along with image information to RF signals in an image recording/reproducing system. Conventional RF modulators can output mono audio information only and thus cannot provide viewers with high fidelity sound. Accordingly, the stereo RF modulating system comprising an audio matrix means, a pilot signal source, a first mixer, a RF carrier oscillator, a first and second local oscillators, a video modulator, first and second modulators, a second mixer, a first switching device, and a second switching device, converts stereo information along with image information to RF signals, and thus provides high fidelity sound.

摘要翻译： 公开了一种在图像记录/再现系统中将立体声信息与图像信息一起转换为RF信号的立体声RF调制系统。 传统的RF调制器只能输出单声道音频信息，因此不能为观众提供高保真度的声音。 因此，立体声RF调制系统包括音频矩阵装置，导频信号源，第一混频器，RF载波振荡器，第一和第二本地振荡器，视频调制器，第一和第二调制器，第二混频器，第一开关 设备和第二开关设备将立体声信息与图像信息一起转换为RF信号，从而提供高保真度的声音。