公开(公告)号：US20040057535A1

公开(公告)日：2004-03-25

申请号：US10251650

申请日：2002-09-20

申请人： ATI Technologies Inc.

发明人： Christopher H. Strolle ,  Samir N. Hulyalkar ,  Jeffrey S. Hamilton ,  Haosong Fu ,  Troy A. Schaffer

IPC分类号： H04L027/02 ,  H03D001/24 ,  H03D001/00 ,  H04L027/06

CPC分类号： H04H20/28 ,  H04H20/57 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/0071 ,  H04L7/0004 ,  H04L7/0062 ,  H04L7/0278 ,  H04L25/0307 ,  H04L27/04 ,  H04L27/066 ,  H04L2025/03382 ,  H04L2025/03598 ,  H04L2027/004 ,  H04L2027/0055 ,  H04L2027/0081

摘要： A robust data extension added to a standard 8VSB digital television signal is used to improve the performance of a digital television receiver. The robust data extension is added to a standard 8VSB digital television transmission system by encoding high priority data packets in a rate null trellis encoder. The high priority data null trellis encoded packets are then multiplexed with normal data packets and input into the normal data service of an 8VSB system, which further contains a rate null trellis encoder. The combined trellis encoding results in a rate null trellis encoding for robust data packets and a rate null trellis encoding for normal packets. Backward compatibility with existing receivers is maintained for 1) 8VSB signaling, 2) trellis encoding and decoding, 3) Reed Solomon encoding and decoding, and 4) MPEG compatibility. In addition to delivery of robust data for mobile applications, the redundant robust data packets also improve the performance of the receiver in the normal tier of service. In particular, the robust data packets improve the performance of the receiver equalizer filter in the presence of rapidly changing transient channel conditions such as dynamic multipath for both robust data packets and normal data packets. The robust data packets improve the performance of the carrier recovery loop and the symbol timing recovery loop.

摘要翻译： 增加到标准8VSB数字电视信号的强大数据扩展被用于提高数字电视接收机的性能。 强大的数据扩展被添加到标准的8VSB数字电视传输系统中，通过以速率½格式编码器对高优先级的数据包进行编码。 然后将高优先级数据½网格编码数据包与正常数据包进行复用，并输入到8VSB系统的正常数据服务中，该数据服务还包含速率2/3网格编码器。 组合网格编码产生用于稳健数据分组的速率1/3网格编码以及针对普通分组的速率2/3网格编码。 维护与现有接收机的向后兼容性1）8VSB信令，2）网格编码和解码，3）里德所罗门编码和解码，以及4）MPEG兼容性。 除了为移动应用提供强大的数据外，冗余的鲁棒数据包还可以提高接收机在正常服务级别中的性能。 特别地，鲁棒数据分组在存在快速变化的瞬态信道条件（诸如鲁棒数据分组和正常数据分组的动态多径）的情况下，提高了接收机均衡器滤波器的性能。 鲁棒的数据包提高了载波恢复环路和符号定时恢复环路的性能。