公开(公告)号：US5986720A

公开(公告)日：1999-11-16

申请号：US845442

申请日：1997-04-25

申请人： Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Masahiko Nakamura ,  Yoshinori Takagi ,  Masanobu Kanaya

发明人： Takaaki Kishigami ,  Masahiro Mimura ,  Makoto Hasegawa ,  Masahiko Nakamura ,  Yoshinori Takagi ,  Masanobu Kanaya

IPC分类号： H04N5/21 ,  H04N5/44 ,  H04N21/414 ,  H04N21/442 ,  H04N5/455

CPC分类号： H04N5/44 ,  H04N21/41407 ,  H04N21/44209 ,  H04N5/21

摘要： A mobile television receiver includes a TV tuner demodulating an incoming TV signal into a first video signal. A first horizontal sync signal is separated from the first video signal. Detection is made as to a quality of an image represented by the first video signal. A second horizontal sync signal is generated. Detection is made as to a difference between a phase of the first horizontal sync signal and a phase of the second horizontal sync signal. The phase of the second horizontal sync signal is controlled in response to the detected phase difference between the first horizontal sync signal and the second horizontal sync signal so that the second horizontal sync signal will be locked in phase and frequency to the first horizontal sync signal. A memory unit stores the first video signal in response to a memory control signal, and outputs the stored first video signal as a second video signal. The memory control signal is generated in response to the detected image quality. The second video signal is displayed in response to the second horizontal sync signal.

摘要翻译： 移动电视接收机包括将输入的TV信号解调为第一视频信号的TV调谐器。 第一水平同步信号与第一视频信号分离。 对由第一视频信号表示的图像的质量进行检测。 产生第二水平同步信号。 检测第一水平同步信号的相位与第二水平同步信号的相位之差。 响应于第一水平同步信号和第二水平同步信号之间检测到的相位差来控制第二水平同步信号的相位，使得第二水平同步信号将以相位和频率锁定到第一水平同步信号。 存储单元响应于存储器控制信号存储第一视频信号，并将所存储的第一视频信号作为第二视频信号输出。 响应于检测到的图像质量而产生存储器控制信号。 响应于第二水平同步信号显示第二视频信号。