公开(公告)号：US5745504A

公开(公告)日：1998-04-28

申请号：US668460

申请日：1996-06-25

申请人： Karl Goran B.ang.ng

发明人： Karl Goran B.ang.ng

IPC分类号： H03M7/42 ,  H03M13/00 ,  H04L1/00

CPC分类号： H04L1/0059 ,  H03M7/42 ,  H04L1/0071

摘要： Data is transmitted and received over a channel in a telecommunications system includes encoding the data by providing a plurality of fixed length code tables, wherein each of the fixed length code tables has a size that is different from a size of every other fixed length code table, and encoding the data as a plurality of information code words, wherein each information code word is a selected value from one of the fixed length code tables. A plurality of marker codes is also provided, wherein the marker codes are variable length codes. A unique one of the marker codes is then associated with each of the fixed length code tables, and channel code words are generated by inserting the associated marker code one bit at a time into each of the information code words at a fixed bit interval. The encoded data may be decoded by processing in a forward direction to extract and decode marker code words. Information code bits associated with valid decoded marker code words are extracted and decoded. When an invalid marker code word is extracted, backwards processing is commenced to extract and decode marker code words until an invalid marker code is detected in the backwards direction. An error interval is defined by the positions of the invalid marker code words detected in the forward and backwards directions. Only those valid information code words associated with marker code words that lie outside of the error interval are output for further processing.

摘要翻译： 通过电信系统中的信道发送和接收数据包括通过提供多个固定长度码表来对数据进行编码，其中固定长度码表中的每一个具有与每隔一个固定长度码表的大小不同的大小 并且将数据编码为多个信息码字，其中每个信息码字是来自固定长度码表之一的选择值。 还提供了多个标记代码，其中标记代码是可变长度代码。 然后将唯一的一个标记代码与每个固定长度码表相关联，并且通过以固定的位间隔一次将相关联的标记码一位地插入每个信息码字中来生成信道码字。 编码数据可以通过正向处理来解码，以提取和解码标记码字。 提取和解码与有效解码标记码字相关联的信息码位。 当提取无效的标记代码字时，开始向后处理以提取和解码标记代码字，直到在向后方向上检测到无效的标记代码。 错误间隔由在向前和向后方向上检测到的无效标记代码字的位置定义。 仅输出与错误间隔之外的标记代码字相关联的有效信息代码字，用于进一步处理。