公开(公告)号：EP1538831A1

公开(公告)日：2005-06-08

申请号：EP04028144.6

申请日：2004-11-26

申请人： ORION ELECTRIC CO., Ltd.

发明人： Tsubokawa, Yukio, c/o Orion Electric Co., Ltd.

IPC分类号： H04N5/44

CPC分类号： H03J5/0245 ,  H03J1/0041 ,  H03J5/0263 ,  H03J5/0281 ,  H03J7/026 ,  H04N5/44 ,  H04N5/50 ,  H04N21/4263 ,  H04N21/4384

摘要： It is an object of the invention to provide a channel selecting unit capable of implementing a channel selecting operation accurately in a short time with a simple circuit configuration. AFT voltages from a tuner 10 of a picture recording and playback portion 1 and a tuner 20 of a receiver portion 2 are detected by an AFT voltage detecting portion 30, while a synchronous signal separated at a video information processing portion 13 of the picture recording and playback portion 1 is counted by a pulse counter 31 and the presence or absence of synchronization is detected by a synchronization detecting potion 33. A channel selecting portion 32 transmits a tuning instruction signal to the tuner 10 and allows tuning frequency data f 1 and an AFT voltage value V 0 , at the time when synchronization was detected, to be stored in a storage portion 4, thereby implementing the channel selecting operation based on stored data at the time of channel select processing of the tuner 20.

摘要翻译： 本发明的目的是提供一种能够以简单的电路配置在短时间内精确地实现频道选择操作的频道选择单元。 来自图像记录和再现部分1的调谐器10和接收机部分2的调谐器20的AFT电压由AFT电压检测部分30检测，而在图像记录的视频信息处理部分13分离的同步信号和 重放部分1被脉冲计数器31计数，并且由同步检测部分33检测是否存在同步。信道选择部分32向调谐器10发送调谐指令信号，并且允许调谐频率数据f1和AFT电压 在检测到同步时的值V0被存储在存储部分4中，从而在调谐器20的频道选择处理时基于存储的数据实现频道选择操作。