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59 条记录 (耗时 0.012 秒)

    INTERACTIVE SELECTION SYSTEM FOR A VIDEO DECODER MODULATOR CHANNEL
    51.
    发明公开
    INTERACTIVE SELECTION SYSTEM FOR A VIDEO DECODER MODULATOR CHANNEL 有权
    交互式控制系统的视频解码器的频道调制器

    公开(公告)号：EP1062803A1

    公开(公告)日：2000-12-27

    申请号：EP99911044.8

    申请日：1999-03-03

    申请人： Thomson Licensing S.A.

    发明人： PUGEL, Michael, Anthony

    IPC分类号： H04N5/40

    CPC分类号： H04N5/40 ,  H04N5/44 ,  H04N5/7755 ,  H04N21/4104 ,  H04N21/4382 ,  H04N21/485 ,  H04N21/488

    摘要： A method for compatibly tuning a video signal receiver to an image processing device involves generating (47) a prompting message for display to prompt a user to initiate a command response. First and second signals are generated (20). Each signal incorporates the prompting message (14, 50) but only one of the signals is compatibly tuned to the display. The first and second signals are alternately provided to the display (52) and the prompting message is legibly displayed when the compatibly tuned signal is provided. The signal that is compatibly tuned to the display is selected (15) in response to the command (60).

    Vacant broadcast channel searching system
    52.
    发明公开
    Vacant broadcast channel searching system 审中-公开
    系统zum Suchen eines freien Rundfunkkanals

    公开(公告)号：EP1026892A1

    公开(公告)日：2000-08-09

    申请号：EP00100884.6

    申请日：2000-01-18

    申请人： Pace Micro Technology PLC

    发明人： Coe, Peter

    IPC分类号： H04N5/775 ,  H04N5/40

    CPC分类号： H04N5/44 ,  H04N5/40 ,  H04N5/7755 ,  H04N21/4382

    摘要： The invention relates to the installation of electrical apparatus for receiving broadcast data, referred to as a receiver, which receives data and generates video/audio displays through a television set to which it is connected. When installing, the receiver can use the RF modulator signal from the television as reference but this can be interfered if the channel used to carry the signal is already used to receive a signal from an aerial input. The current invention prevents interference by first scanning the aerial input to identify the signals received and the location of the same which then allows free locations or channels to be identified and used for the RF modulator signal.

    摘要翻译： 本发明涉及用于接收广播数据的电气设备的安装，被称为接收机，其接收数据并通过其所连接的电视机产生视频/音频显示。 当安装时，接收机可以使用来自电视的RF调制器信号作为参考，但是如果用于携带信号的信道已被用于接收来自空中输入的信号，则可能会被干扰。 本发明通过首先扫描天线输入来识别所接收的信号和相同的位置来防止干扰，然后允许空闲位置或信道被识别并用于RF调制器信号。

    A MODULATOR CIRCUIT
    54.
    发明授权
    A MODULATOR CIRCUIT 失效
    调制器电路

    公开(公告)号：EP0581936B1

    公开(公告)日：1996-12-04

    申请号：EP93903991.3

    申请日：1993-02-18

    申请人： MOTOROLA, INC.

    发明人： LIGERTWOOD, Peter, John

    IPC分类号： H04N5/40

    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 means (4, 10) for generating a carrier signal having a selectably variable frequency, and modulating means (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 means 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 means. The modulator circuit further comprises control means (5, 6, 20) coupled to the oscillator means (4, 10) and to the modulating means (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 means 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.

    RF modulator
    55.
    发明公开
    RF modulator 失效
    射频调制器

    公开(公告)号：EP0432052A3

    公开(公告)日：1991-10-02

    申请号：EP90403498.0

    申请日：1990-12-07

    申请人： SONY CORPORATION

    发明人： Ishikawa, Nobuyuki ,  Higuchi, Hiroshi ,  Narahara, Hisaaki ,  Tanabe, Shinichi ,  Ishikawa, Fumio

    IPC分类号： H04N5/40 ,  H04N5/76

    CPC分类号： H04N5/40 ,  H03C5/00

    摘要： An RF modulator comprising an FM modulator (22) supplied with an audio signal, an AM modulator (24) supplied with the FM audio output and a video signal, an oscillator (32) for generating a sound subcarrier signal, and an oscillator (7) for generating a main carrier signal. Each of the oscillators (32, 17) consists of a VCO with a PLL circuit, and the entire components are composed of a single IC chip so as to be formed into a compact miniature structure. A modified RF modulator includes a PLL circuit (15) for varying the oscillation frequency of a VCO (17) by a variable frequency divider (18), and a modulation circuit supplied with a modulating signal and the oscillation output of the VCO (17). The division ratio (integer) of the variable frequency divider (18) is continuously varied, and the reference frequency of a reference oscillator (16) is set to be less than a predetermined channel interval frequency, thereby reducing the frequency error in the modulated signal output.

    Television transmitter
    56.
    发明公开
    Television transmitter 失效
    Fernsehsenderapparat。

    公开(公告)号：EP0421715A2

    公开(公告)日：1991-04-10

    申请号：EP90310749.8

    申请日：1990-10-01

    申请人： THE MARCONI COMPANY LIMITED

    发明人： Binns, John Frederick Howard

    IPC分类号： H04N5/40 ,  H04N5/067

    CPC分类号： H04N5/40

    摘要： In a television transmitter having separate picture - and sync-modulated r.f. amplification (57 and 58), the sync-modulated r.f. signal is derived from the picture-modulated signal using a modulator (40) controlled by the video sync signal (42) conventionally present in the transmitter. This simplifies the construction of the transmitter, and is particularly applicable to solid-state amplifier transmitters.

    摘要翻译： 在具有分离的图像和同步调制r.f的电视发射机中。 放大（57和58），同步调制r.f. 使用由传送器中常规存在的视频同步信号（42）控制的调制器（40）从图像调制信号导出信号。 这简化了发射机的结构，特别适用于固态放大器发射机。

    Video signal recorder/player devices
    57.
    发明公开
    Video signal recorder/player devices 失效
    Videosignalaufnahme /rückgabegerät。

    公开(公告)号：EP0325332A2

    公开(公告)日：1989-07-26

    申请号：EP89200096.9

    申请日：1989-01-17

    申请人： PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

    发明人： Baxter, Thomas

    IPC分类号： H04N5/40 ,  H04N5/76

    CPC分类号： H04N5/775 ,  H04N5/782

    摘要： A video signal recorder/player device, e.g. a video tape recorder, is adapted to a select a playback channel to be any one of a plurality of UHF television channels. A microcontroller in the device sets a UHF tuner in the device to each UHF channel in turn and tests the signal level in the channel. A free channel containing substantially no signals is selected, when found, as the playback channel, only when the immediately adjacent lower channel does not contain a wanted broadcast television transmission. Once a selection is made, the microcontroller sets the playback channel frequency to that of the selected channel.

    摘要翻译： 视频信号记录器/播放器装置，例如 一种录像机，适用于选择多个UHF电视频道中任何一个的播放频道。 设备中的微控制器依次将UHF调谐器设置到每个UHF通道，并测试通道中的信号电平。 当发现基本上没有信号的空闲频道当被找到时，仅当紧邻的下级频道不包含所需的广播电视传输时才被选择作为播放频道。 一旦做出选择，微控制器将播放通道频率设置为所选通道的频率。