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16 条记录 (耗时 0.015 秒)

    Image control apparatus for a television receiver
    1.
    发明公开
    Image control apparatus for a television receiver 失效
    BildsteuergerätfüreinenFernsehempfänger。

    公开(公告)号：EP0495431A1

    公开(公告)日：1992-07-22

    申请号：EP92100448.7

    申请日：1992-01-13

    申请人： HITACHI, LTD. ,  Hitachi Video & Information System, Inc.

    发明人： Akiyama, Moriyoshi ,  Kurita, Toshiyuki ,  Sekiya, Hiroshi ,  Suzuki, Sunao, Purumieru Kugenuma C201 ,  Hishiyama, Katsumi ,  Murata, Toshinori

    IPC分类号： H04N5/21

    CPC分类号： H04N5/21 ,  H04N5/211

    摘要： An image control apparatus in a television receiver, wherein after determining the frequency characteristic of an inputted video signal, when a high frequency band of the frequency characteristic has been raised above a predetermined level, the image quality is enhanced after performing waveform equalization on the video signal to cancel an impression of a dim image, given to the visual sense, and on the other hand, when the high frequency band of the inputted video signal has been lowered, noise reduction is performed after waveform equalization to further degrade the image quality for preventing deterioration of the S/N ratio, thereby usually providing appropriate images. The image control apparatus includes a waveform equalizer (101), a distorted waveform extraction control unit (102), a noise reduction circuit (103), and an image quality control unit (104). The waveform equalizer (101) receives an inputted video signal, equalizes waveform of the video signal, and outputs the waveform equalized video signal. The distorted waveform extraction control unit (102) detects distorted waveform from the output of the waveform equalizer and controls the waveform equalizer to perform waveform equalization suitable for the inputted video signal. It also controls the noise reduction circuit (103) and the image quality control unit (104) in accordance with changes in the frequency characteristic of the video signal before and after waveform equalization to intensify the noise reduction for degrading the image quality, when the high frequency band of the frequency characteristic of the input signal has been lowered, and, contrarily, to debilitate or stop the noise reduction for enhancing the image quality, when the high frequency band has been raised.

    摘要翻译： 一种电视接收机中的图像控制装置，其中，在确定了输入的视频信号的频率特性之后，当频率特性的高频带已经升高到高于预定电平时，在对视频进行波形均衡之后增强了图像质量 信号以取消给予视觉的暗淡图像的印象，另一方面，当输入的视频信号的高频带已经降低时，在波形均衡之后执行降噪以进一步降低图像质量，以便 防止S / N比的劣化，从而通常提供适当的图像。 图像控制装置包括波形均衡器（101），失真波形提取控制单元（102），噪声降低电路（103）和图像质量控制单元（104）。 波形均衡器（101）接收输入的视频信号，使视频信号的波形相等，并输出波形均衡视频信号。 失真波形提取控制单元（102）从波形均衡器的输出端检测失真的波形，并且控制波形均衡器执行适合于输入的视频信号的波形均衡。 它还根据波形均衡之前和之后的视频信号的频率特性的变化来控制降噪电路（103）和图像质量控制单元（104），以加强降低图像质量的降噪，当高 输入信号的频率特性的频带已经降低，并且相反地，当高频带已经被提高时，为了提高图像质量而使噪声降低衰减或停止。

    Television receiver capable of enlarging and compressing image
    3.
    发明公开
    Television receiver capable of enlarging and compressing image 失效
    FernsehgerätfähigzumVergrössernund Verkleinern des Bildes。

    公开(公告)号：EP0630154A3

    公开(公告)日：1995-04-12

    申请号：EP94109332.0

    申请日：1994-06-16

    申请人： HITACHI, LTD.

    发明人： Katsumata, Kenji ,  Hirahata, Shigeru ,  Murata, Toshinori ,  Takata, Haruki ,  Torikoshi, Shinobu ,  Eda, Takanori ,  Ishibashi, Kouichi

    IPC分类号： H04N5/44

    CPC分类号： H04N7/0122 ,  H04N3/27

    摘要： To provide an image which is matched with an aspect ratio of a screen of a display unit by compressing and enlarging the whole of the image to a desired size. A video signal is sequentially written into a field memory in response to a write clock from an input terminal (118). A clock generating circuit (119) supplies the field memory (103) with a read clock having a frequency which is about 4/3 times as high as that of the write clock. A vertical enlargement control circuit (110) reads a video signal from the field memory (103) with a line period corresponding to a magnification factor and inhibits writing to a one-line memory (105) with the same period to provide a line delayed output for an output signal from the field memory (13). A vertical interpolating circuit (106) generates a scanning line signal by an interpolation operation in accordance with a control signal from the vertical enlargement control circuit (110).

    摘要翻译： 通过将整个图像压缩并放大到期望的大小来提供与显示单元的屏幕的纵横比匹配的图像。 响应于来自输入端子（118）的写时钟，视频信号被顺序地写入场存储器。 时钟发生电路（119）向场存储器（103）提供具有与写入时钟的频率约高4/3倍的频率的读时钟。 垂直放大控制电路（110）以与放大率对应的行周期从场存储器（103）读取视频信号，并禁止以相同周期向单行存储器（105）写入以提供行延迟输出 用于来自场存储器（13）的输出信号。 垂直内插电路（106）根据来自垂直放大控制电路（110）的控制信号，通过内插运算产生扫描线信号。

    Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof
    4.
    发明公开
    Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof 失效
    数码相机Rundfunkempfangs- und -sendesystem sowie Sender undEmpfängerdazu

    公开(公告)号：EP0762765A2

    公开(公告)日：1997-03-12

    申请号：EP96306376.3

    申请日：1996-09-03

    申请人： HITACHI, LTD.

    发明人： Bando, Yumi ,  Murata, Toshinori ,  Okamura, Takumi ,  Katsumata, Kenji ,  Nanki, Masaru ,  Eda, Takanori ,  Imuro, Satoshi ,  Takashimizu, Satoru

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1675 ,  H04N5/913 ,  H04N21/2347 ,  H04N21/2541 ,  H04N21/26606 ,  H04N21/4405 ,  H04N2005/91328 ,  H04N2005/91364

    摘要： An arrangement to automatically change between a scrambled digital data output and descrambled digital data output of a receiver by inserting a control signal conforming to a program provider's policy into a transmission signal. In a receiving side, a descrambler descrambles a channel-decoded signal, a demultiplexer demultiplexes the multiplexed signal from the descrambler into encoded video and audio data for output to a source decoder, and extracts the control information inserted in the transmitting side for output to a switch or CPU. The CPU decrypts a control signal from the control information extracted by the demultiplexer to determine whether the scrambled digital signal or descrambled digital signal is appropriate for output, and outputs a changeover control signal depending on the result of decryption. A switch selects the output of a scrambled digital signal from a stage prior to the descrambler, or a descrambled digital signal from a stage subsequent to the descrambler, depending on the changeover control signal from the CPU. Thereby, a scrambled digital signal output or descrambled digital signal output can automatically be changed over depending on a program provider's policy.

    摘要翻译： 通过将符合程序提供商策略的控制信号插入到发送信号中，在加扰的数字数据输出和接收机的解扰数字数据输出之间自动地改变。 在接收侧，解扰器对信道解码信号进行解扰，解复用器将来自解扰器的复用信号解复用为编码视频和音频数据，以输出到源解码器，并提取插入发送侧的控制信息，以输出到 开关或CPU。 CPU从由解复用器提取的控制信息中解密控制信号，以确定加密数字信号或解扰数字信号是否适于输出，并根据解密结果输出切换控制信号。 切换器根据来自CPU的切换控制信号，选择来自解扰器之前的级的加扰数字信号的输出或来自解扰器之后的级的解扰数字信号。 因此，根据程序提供者的策略，加扰数字信号输出或解扰数字信号输出可以自动地改变。

    Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof
    5.
    发明公开
    Digital broadcast transmitting and receiving system and transmitting and receiving apparatus thereof 失效
    数字无线电接收和-sendesystem和发射器和接收器，以

    公开(公告)号：EP0762765A3

    公开(公告)日：1999-06-16

    申请号：EP96306376.3

    申请日：1996-09-03

    申请人： HITACHI, LTD.

    发明人： Bando, Yumi ,  Murata, Toshinori ,  Okamura, Takumi ,  Katsumata, Kenji ,  Nanki, Masaru ,  Eda, Takanori ,  Imuro, Satoshi ,  Takashimizu, Satoru

    IPC分类号： H04N7/167

    CPC分类号： H04N7/1675 ,  H04N5/913 ,  H04N21/2347 ,  H04N21/2541 ,  H04N21/26606 ,  H04N21/4405 ,  H04N2005/91328 ,  H04N2005/91364

    摘要： An arrangement to automatically change between a scrambled digital data output and descrambled digital data output of a receiver by inserting a control signal conforming to a program provider's policy into a transmission signal. In a receiving side, a descrambler descrambles a channel-decoded signal, a demultiplexer demultiplexes the multiplexed signal from the descrambler into encoded video and audio data for output to a source decoder, and extracts the control information inserted in the transmitting side for output to a switch or CPU. The CPU decrypts a control signal from the control information extracted by the demultiplexer to determine whether the scrambled digital signal or descrambled digital signal is appropriate for output, and outputs a changeover control signal depending on the result of decryption. A switch selects the output of a scrambled digital signal from a stage prior to the descrambler, or a descrambled digital signal from a stage subsequent to the descrambler, depending on the changeover control signal from the CPU. Thereby, a scrambled digital signal output or descrambled digital signal output can automatically be changed over depending on a program provider's policy.

    Television receiver capable of enlarging and compressing image
    8.
    发明公开
    Television receiver capable of enlarging and compressing image 失效
    电视能够和拍照的变焦。

    公开(公告)号：EP0630154A2

    公开(公告)日：1994-12-21

    申请号：EP94109332.0

    申请日：1994-06-16

    申请人： HITACHI, LTD.

    发明人： Katsumata, Kenji ,  Hirahata, Shigeru ,  Murata, Toshinori ,  Takata, Haruki ,  Torikoshi, Shinobu ,  Eda, Takanori ,  Ishibashi, Kouichi

    IPC分类号： H04N5/44

    CPC分类号： H04N7/0122 ,  H04N3/27

    摘要： To provide an image which is matched with an aspect ratio of a screen of a display unit by compressing and enlarging the whole of the image to a desired size. A video signal is sequentially written into a field memory in response to a write clock from an input terminal (118). A clock generating circuit (119) supplies the field memory (103) with a read clock having a frequency which is about 4/3 times as high as that of the write clock. A vertical enlargement control circuit (110) reads a video signal from the field memory (103) with a line period corresponding to a magnification factor and inhibits writing to a one-line memory (105) with the same period to provide a line delayed output for an output signal from the field memory (13). A vertical interpolating circuit (106) generates a scanning line signal by an interpolation operation in accordance with a control signal from the vertical enlargement control circuit (110).

    Signal converting method and circuit for television receiver
    10.
    发明公开
    Signal converting method and circuit for television receiver 失效
    信号转换方法和电路，用于电视接收机。

    公开(公告)号：EP0169527A2

    公开(公告)日：1986-01-29

    申请号：EP85109133.0

    申请日：1985-07-22

    申请人： HITACHI, LTD.

    发明人： Nakagaki, Nobufumi ,  Murata, Toshinori ,  Kurita, Toshiyuki

    IPC分类号： H04N5/44

    CPC分类号： H04N7/012

    摘要： A signal converting circuit is disclosed for converting a television signal for 2:1 interlaced scanning system to another television signal for 1:1 non-interlaced scanning system using line memories (3, 4 5) for storing image data of two adjacent scanning lines of a present field and field memories (23, 24) for storing image data of a last occurring field. An interpolation signal (10) is produced by controlling a value of the televisions signal (16, 17) of the two adjacent scanning lines in response to the television signal (29) of the two adjacent scanning lines in the present field and the television signal of a scanning line positioned between the two adjacent scanning lines in the last occurring field.