公开(公告)号：US4817195A

公开(公告)日：1989-03-28

申请号：US137148

申请日：1987-12-23

申请人： Kazuhiko Kubo ,  Akira Usui ,  Minoru Miyata ,  Hideyuki Ikuhara ,  Hiroyuki Nagai ,  Tadashi Yamada

发明人： Kazuhiko Kubo ,  Akira Usui ,  Minoru Miyata ,  Hideyuki Ikuhara ,  Hiroyuki Nagai ,  Tadashi Yamada

IPC分类号： H03J7/02 ,  H03J7/06 ,  H04B1/10 ,  H04B1/16

CPC分类号： H03J7/065

摘要： A channel selection apparatus having a double superhet tuner section (15) for converting one of a plurality of television channels contained in an input signal to a fixedly predetermined channel, includes an AFC circuit (11) for producing a frequency control voltage to execute closed-loop frequency control of the second local oscillator (5) of the tuner section while an AFC switch (16) is set in a first condition, whereas when the AFC switch is set in a second condition, a fixed frequency control voltage is applied to the second local oscillator and the frequency control voltage is applied to adjust the oscillation frequency of the first local oscillator (2) of the tuner section such as to compensate for any offset in the transmission frequency of a currently selected channel.

公开(公告)号：US4835492A

公开(公告)日：1989-05-30

申请号：US163814

申请日：1988-02-11

申请人： Hideyuki Ikuhara ,  Akira Usui ,  Kazuhiko Kubo ,  Hiroyuki Nagai ,  Tetsuo Kutsuki

发明人： Hideyuki Ikuhara ,  Akira Usui ,  Kazuhiko Kubo ,  Hiroyuki Nagai ,  Tetsuo Kutsuki

IPC分类号： H03B1/00 ,  H03B5/18 ,  H03D7/00 ,  H03J7/02 ,  H03J7/08

CPC分类号： H03B5/1805 ,  H03J7/08 ,  H03B2201/0208 ,  H03D7/00

摘要： Disclosed is a local oscillator using a dielectric coaxial resonator (27), which is availably used as a fixed local oscillator in double-spot tuners and CATV converters, and which is arranged so that an AFC voltage is applied to a variable-capacitance diode (23) from an output terminal (E) of a frequency control circuit through a first resistor (35), the variable-capacitance diode having its one end being connected to a center conductor of a dielectric coaxial resonator (27) through a capacitor (25) and its other end being AC grounded, and that a first reference potential (V.sub.A) lower than a source voltage (V.sub.CC) by a predetermined value is given to the variable-capacitance diode (23), the one end of the variable-capacitance diode (23) being connected to the source voltage (V.sub.CC) through a second resistor (22), whereby the voltage impressed across the variable-capacitance diode (23) can be kept constant regardless of a variation in the source voltage to thereby prevent the oscillation frequency from fluctuating.

摘要翻译： 公开了一种使用电介质同轴谐振器（27）的本地振荡器，其可用作双点调谐器和CATV转换器中的固定本地振荡器，并且被布置成使得AFC电压被施加到可变电容二极管 23）通过第一电阻器（35）从频率控制电路的输出端子（E）输出，其一端通过电容器（25）连接到电介质同轴谐振器（27）的中心导体 ）并且其另一端被交流接地，并且将低于源电压（VCC）的预定值的第一参考电位（VA）提供给可变电容二极管（23），可变电容的一端 二极管（23）通过第二电阻（22）连接到源电压（VCC），由此不管源极电压的变化如何，跨越可变电容二极管（23）的电压保持恒定，从而防止 振荡频率 通货膨胀波动。

公开(公告)号：US5031031A

公开(公告)日：1991-07-09

申请号：US371858

申请日：1989-06-27

申请人： Hideyuki Ikuhara

发明人： Hideyuki Ikuhara

IPC分类号： H04N9/77 ,  H04N11/02 ,  H04N11/08

CPC分类号： H04N11/08

摘要： A video signal processing apparatus for processing a video signal including SYNC pulses, a time-compressed color difference and luminance signals, compression factors of those signals being different from each other, the color difference signal and luminance signals being transmitted sequentially for one horizontal line for simultaneously outputting time-reproduced color difference and luminance signals comprises: first and second time-expansion circuits for producing the time-reproduced luminance and color difference signals in response to first and second clocks respectively; a switching circuit for selectively outputting the time-reproduced color difference signal in response to a control signal; a PLL responsive to the video signal including a frequency dividing circuit for producing the first and second clocks, and a synthesized SYNC pulse; and a phase detecting circuit for detecting a phase relation between the video signal and the synthesized SYNC pulse to produce the control signal. When the PLL is out of phase with the SYNC pulse, i.e., not locked, the switch does not transfer the color difference signal from the second time-expansion circuit, preventing time-reproduced signals from producing a double image on a display.

公开(公告)号：US5153724A

公开(公告)日：1992-10-06

申请号：US499351

申请日：1990-08-06

申请人： Toshihiro Miyoshi ,  Hideyuki Ikuhara ,  Yuichi Ninomiya ,  Toshiro Ohmura

发明人： Toshihiro Miyoshi ,  Hideyuki Ikuhara ,  Yuichi Ninomiya ,  Toshiro Ohmura

IPC分类号： H04N5/04 ,  H04N7/015

CPC分类号： H04N7/015 ,  H04N5/44

摘要： The present invention provides an apparatus which receives and displays a high definition television signal and which is constructed so that noise and/or a deformed picture may not be displayed even when an input signal instead of a high definition television signal is applied or when transmission of such a high definition television signal is interrupted. In the apparatus, on the basis of whether or not a frame signal in an input high definition television signal can be detected, a first signal indicating synchronization lock or a second signal indicating synchronization unlock is generated so that, when the first signal is detected, the output of a signal processing circuit (110) is selected to display the high definition television signal, while when the second signal is detected, the output of a pattern generation circuit (114) is selected to prevent display of noise etc.

摘要翻译： PCT No.PCT / JP88 / 01085 Sec。 371日期1990年8月6日 102（e）日期1990年8月6日PCT提交1989年10月24日PCT公布。 出版物WO90 / 04904 1990年3月5日。本发明提供了一种接收和显示高分辨率电视信号的装置，其被构造成使得即使当输入信号代替高分辨率电视时也可能不显示噪声和/或变形图像 信号被施加或当这种高清晰度电视信号的传输被中断时。 在该装置中，基于是否能够检测输入高清晰度电视信号中的帧信号，产生表示同步锁定的第一信号或表示同步解锁的第二信号，使得当检测到第一信号时， 选择信号处理电路（110）的输出以显示高分辨率电视信号，而当检测到第二信号时，选择图案产生电路（114）的输出以防止噪声的显示等。

公开(公告)号：US4984081A

公开(公告)日：1991-01-08

申请号：US301034

申请日：1989-01-24

申请人： Toshihiro Miyoshi ,  Masahiro Kawashima ,  Hideyuki Ikuhara ,  Tetsuo Kutsuki ,  Kazuyasu Yamamoto

发明人： Toshihiro Miyoshi ,  Masahiro Kawashima ,  Hideyuki Ikuhara ,  Tetsuo Kutsuki ,  Kazuyasu Yamamoto

IPC分类号： H04N5/44

CPC分类号： H04N7/0122

摘要： An apparatus for receiving and selecting high-definition television signals and NTSC standard television signals includes a high-definition display screen device having an aspect ratio of 16 to 9. The NTSC standard television signals have an aspect ratio which is different than the 16 to 9 aspect ratio of the high-definition display screen device. A first signal converter is for converting the NTSC standard television signals into first quasi-high-definition television signals identifying a first displayed image corresponding in vertical length to a vertical length of the high-definition display screen device. A second signal converter is for converting the NTSC standard television signals into second quasi-high-definition television signals identifying a second displayed image corresponding in horizontal length to a horizontal length of the high-definition display screen device. Switching circuits are provided for selecting one of the high-definition television signals and the first and second quasi-high-definition television signals.

摘要翻译： 一种用于接收和选择高分辨率电视信号和NTSC标准电视信号的装置包括具有16至9的宽高比的高分辨率显示屏幕设备.NTSC标准电视信号的宽高比不同于16到9 高清显示屏设备的宽高比。 第一信号转换器用于将NTSC标准电视信号转换为第一准高清晰度电视信号，其将垂直长度对应的第一显示图像识别为高清晰度显示屏设备的垂直长度。 第二信号转换器用于将NTSC标准电视信号转换成识别与水平长度对应的第二显示图像与高分辨率显示屏设备的水平长度的第二准高清晰度电视信号。 提供开关电路用于选择高分辨率电视信号和第一和第二准高清晰度电视信号之一。