Retransmission strategies for an acceptable quality of HDTV in the wireless and wired home scenario

Abstract

SUMMARYWe evaluate the performance of various retransmission schemes to achieve the goal of less than one visible distortion in twelve hours for high definition television. The focus is on an indoor wireless link and a DSL link, and we consider systems where the packets are protected by means of retransmissions with and without forward error correcting (FEC) codes. In order to achieve a satisfactory performance with restricted latency, we propose an unconventional retransmission procedure. The overall conclusion is that retransmissions without FEC achieve the best performance with the lowest latency, lowest overhead and lowest complexity, both in the wireless and the wired home scenario.

Protecting IPTV against packet loss: Techniques and trade-offs

“…An example of such an MDS is the already mentioned RS code, noted as RS(N, K): to a block of K symbols, M RS FEC packets are added, making up a codeword of size (K ϩ M ϭ) N packets. Note that the choice of symbols on which the RS code works puts an upper limit on N. For example, the RS code working on bytes, i.e., in the Galois field (GF(2 8 )), is restricted to codewords of a maximum length of 2 8 …”

“…The strategy applied in ARQ is to retransmit a packet that was not received by the STB buffer [4,8,11].…”

Implementation of LT Codes with a Revised Robust Soliton Distribution by Using Kent Chaotic Map

“…Forward error correction (FEC) based on erasure codes have been proposed to provide reliable data transmission over the Internet, which can avoid or reduce feedbacks from receiver to sender [1][2][3][4][5][6]. The main benefit of this approach is that different receivers can recover different lost packets using the same erasure correcting codes.…”