公开(公告)号：EP0567304A2

公开(公告)日：1993-10-27

申请号：EP93303072.8

申请日：1993-04-20

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Hayashi, Kenichiro ,  Inoue, Syuji ,  Kageyama, Sadashi ,  Uwabata, Hideyo ,  Bowser, Todd Stephen ,  Yasumoto, Yoshio

IPC分类号： H04N7/00

CPC分类号： H04N7/007 ,  H04N5/16 ,  H04N5/18 ,  H04N11/167 ,  Y10S348/913

摘要： In the television broadcasting system called letter box method, it is proposed to transmit an image having a larger aspect ratio than that of the existing broadcasting system by using some of the scanning lines of the existing broadcasting system, and transmit some additional information signal in the remaining portion. An offset value applied to the additional information signal at the transmission side must be removed completely at the reception side. Accordingly, at the reception side, in the scanning line in which an offset reference signal indicative of the offset value is transmitted, the offset reference value and a DC level reference value of the scanning line are detected, and these values are retained until a next offset reference signal is detected. By detecting a DC level of a scanning line containing the additional information signal, a difference from the DC level reference value previously detected and retained is obtained, and the offset reference value detected and retained previously is corrected by this difference. Thus obtained offset value is subtracted from the transmitted additional information signal.

摘要翻译： 在称为信箱方式的电视广播系统中，提出通过使用现有广播系统的一些扫描线来发送具有比现有广播系统更大的纵横比的图像，并且在其中发送一些附加信息信号 剩余部分。 在发送侧的附加信息信号的偏移值必须在接收侧被完全去除。 因此，在接收侧，在发送表示偏移值的偏移基准信号的扫描线中检测偏移基准值和扫描线的直流电平基准值，并将这些值保持到下一个 偏移参考信号被检测。 通过检测包含附加信息信号的扫描线的DC电平，获得与先前检测和保持的DC电平参考值的差，并且通过该差校正先前检测和保留的偏移参考值。 从所发送的附加信息信号中减去所获得的偏移值。

公开(公告)号：EP0567304A3

公开(公告)日：1994-05-25

申请号：EP93303072.8

申请日：1993-04-20

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Hayashi, Kenichiro ,  Inoue, Syuji ,  Kageyama, Sadashi ,  Uwabata, Hideyo ,  Bowser, Todd Stephen ,  Yasumoto, Yoshio

IPC分类号： H04N7/00

CPC分类号： H04N7/007 ,  H04N5/16 ,  H04N5/18 ,  H04N11/167 ,  Y10S348/913

摘要： In the television broadcasting system called letter box method, it is proposed to transmit an image having a larger aspect ratio than that of the existing broadcasting system by using some of the scanning lines of the existing broadcasting system, and transmit some additional information signal in the remaining portion. An offset value applied to the additional information signal at the transmission side must be removed completely at the reception side. Accordingly, at the reception side, in the scanning line in which an offset reference signal indicative of the offset value is transmitted, the offset reference value and a DC level reference value of the scanning line are detected, and these values are retained until a next offset reference signal is detected. By detecting a DC level of a scanning line containing the additional information signal, a difference from the DC level reference value previously detected and retained is obtained, and the offset reference value detected and retained previously is corrected by this difference. Thus obtained offset value is subtracted from the transmitted additional information signal.

摘要翻译： 在称为信箱方法的电视广播系统中，提出了通过使用现有广播系统的一些扫描线来发送具有比现有广播系统更大的纵横比的图像，并且将一些附加信息信号 剩余部分。 应用于发送侧的附加信息信号的偏移值必须在接收侧完全移除。 因此，在接收侧，在发送表示偏移值的偏移参考信号的扫描线中，检测偏移参考值和扫描线的DC电平参考值，并且这些值被保持，直到下一个 偏移参考信号被检测。 通过检测包含附加信息信号的扫描线的DC电平，获得与先前检测并保持的DC电平参考值的差值，并且通过该差值预先检测并保持的偏移参考值被校正。 如此获得的偏移值从发送的附加信息信号中减去。