公开(公告)号：US4677484A

公开(公告)日：1987-06-30

申请号：US732873

申请日：1985-05-10

申请人： Robert A. Pitsch ,  Billy W. Beyers, Jr. ,  Larry G. Moore ,  Juri Tults

发明人： Robert A. Pitsch ,  Billy W. Beyers, Jr. ,  Larry G. Moore ,  Juri Tults

IPC分类号： H04N5/12 ,  H04N5/445 ,  H04N5/04 ,  H04N5/00

CPC分类号： H04N5/126 ,  H04N21/42653 ,  H04N21/4532 ,  H04N21/4755 ,  H04N21/485 ,  H04N5/44504

摘要： A television receiver includes apparatus for stabilizing an on-screen character display by which the deflection signal source is controlled for operating in a free-running mode, substantially unaffected by signal variations on the sync input line, rather than in a synchronized mode when sync is unreliable or otherwise undesirable. As another feature, the deflection signal source is caused to operate at substantially the same frequency in either mode.

摘要翻译： 电视接收机包括用于稳定屏幕上字符显示的装置，通过该屏幕字符显示，偏转信号源被控制以在自由运行模式下操作，基本上不受同步输入线上的信号变化的影响，而不是在同步模式下的同步模式 不可靠或不方便。 作为另一个特征，使得偏转信号源在任一模式下以基本上相同的频率工作。

公开(公告)号：US5966166A

公开(公告)日：1999-10-12

申请号：US695454

申请日：1996-11-07

申请人： Roy S. Coutinho ,  James E. Dail ,  Robert A. Pitsch

发明人： Roy S. Coutinho ,  James E. Dail ,  Robert A. Pitsch

IPC分类号： H04N7/12

CPC分类号： H04N7/122

摘要： The compression of composite video data is provided in order to reduce bandwidth and thereby increase the amount of bandwidth available for transmission. Composite video signals that include a plurality of fields are received at a selected clock frequency. A first selected number of fields is stored and a second selected number of fields is dropped. In a Frequency Division Multiplexing mode, the data is read out at a fraction of the selected clock frequency corresponding to the stored portion. In a Time Division Multiplexing mode, the data is read out at the selected clock frequency during selected intervals having a duration corresponding to the time it took to receive the stored fields. No data is read out during an interval having a duration equal to the time it took to scan the dropped fields, such time being allocated to the compressed information from other users of the same shared transmission medium.

摘要翻译： 提供复合视频数据的压缩以便减少带宽，从而增加可用于传输的带宽量。 以选定的时钟频率接收包括多个场的复合视频信号。 存储第一选定数量的字段并且丢弃第二选定数量的字段。 在频分复用模式中，以对应于存储部分的选定时钟频率的一小部分读出数据。 在时分多路复用模式下，在选定的时间间隔内以与接收存储字段所花费的时间相对应的持续时间来读出数据。 在具有等于扫描所丢弃的字段所花费的时间的时间间隔内没有读出数据，这些时间被分配给来自相同共享传输介质的其他用户的压缩信息。