公开(公告)号：EP0805572A2

公开(公告)日：1997-11-05

申请号：EP97303075.2

申请日：1997-05-06

Applicant: TEXAS INSTRUMENTS INC.

Inventor： Liu, Christine N. ,  Leblanc, Wilfrid P. ,  Viswanathan, Vishu R.

IPC: H04L1/00

CPC classification number: H04L1/0057 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/20 ,  H04L1/201

Abstract: An improved error detection and error concealment for Viterbi decoding of convolutionally encoded data is provided. The most sensitive part of the data is parity encoded and sent with parity and this data with the next most sensitive data are convolutionally encoded and sent with the least sensitive data over a transmission channel to a receiver. At the receiver the convolutionally encoded data is decoded using the Viterbi algorithm. The decoder compares the parity computed from decoded data with the decoded parity and if they are not equal generates a Bad Frame Indicator (BFI) flag and also determines which decoded parameters are likely bad and hence generates a Bad Parameter Indicator (BPI) flag for those parameters, by determining the confidence levels for the parameters and comparing against pre-selected thresholds. The decision to discard a decoded parameter is dependent on the BFI flag and the BPI flag of that parameter.

Abstract translation: 提供了用于卷积编码数据的维特比解码的改进的错误检测和错误隐藏。 数据的最敏感部分是奇偶校验编码并以奇偶校验发送，并且具有下一个最敏感数据的该数据被卷积编码，并且通过传输信道将最不灵敏的数据发送到接收机。 在接收机处，使用维特比算法对卷积编码数据进行解码。 解码器将从解码数据计算的奇偶校验与解码的奇偶校验进行比较，如果它们不相等，则生成坏帧指示符（BFI）标志，并且还确定哪些解码参数可能是坏的，并因此为那些生成不良参数指示符（BPI）标志 参数，通过确定参数的置信水平并与预先选择的阈值进行比较。 放弃解码参数的决定取决于该参数的BFI标志和BPI标志。

公开(公告)号：EP0805572A3

公开(公告)日：2000-09-27

申请号：EP97303075.2

申请日：1997-05-06

Applicant: TEXAS INSTRUMENTS INC.

Inventor： Liu, Christine N. ,  Leblanc, Wilfrid P. ,  Viswanathan, Vishu R.

IPC: H04L1/00

CPC classification number: H04L1/0057 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/20 ,  H04L1/201

Abstract: An improved error detection and error concealment for Viterbi decoding of convolutionally encoded data is provided. The most sensitive part of the data is parity encoded and sent with parity and this data with the next most sensitive data are convolutionally encoded and sent with the least sensitive data over a transmission channel to a receiver. At the receiver the convolutionally encoded data is decoded using the Viterbi algorithm. The decoder compares the parity computed from decoded data with the decoded parity and if they are not equal generates a Bad Frame Indicator (BFI) flag and also determines which decoded parameters are likely bad and hence generates a Bad Parameter Indicator (BPI) flag for those parameters, by determining the confidence levels for the parameters and comparing against pre-selected thresholds. The decision to discard a decoded parameter is dependent on the BFI flag and the BPI flag of that parameter.