Field test results of multi‐channel digital tv transmission at 15 and 30 Mb/s through an intelsat satellite using a PSK/FDMA system

Abstract

This paper describes field test results of multi‐channel digital TV transmission using a PSK/FDMA system and the related subjective test results of received TV pictures. The picture quality of the multi‐channel 15 or 30 Mb/s transmission for both NTSC and PAL systems through the INTELSAT POR satellite are subjectively evaluated for various bit‐error rates. In addition, subjective evaluations were made at various values of earth‐station e.i.r.p. to compare the picture quality of digital transmissions with that of current half‐transponder FM transmission.

Field Test of 34-Mbit/s Video Signal Transmission via Satellite

“…A similar codec used on a field test of satellite transmission between Japan and Australia already exhibited deterioration of picture quality at bit error rates of more than 10 ~8 (after error correction) [4]. Whether the error correction method used up to now is also sufficient in this case is to be investigated in a further field test in the context of the COST-211-BIS project.…”

Universal digital TV codec—unicodec

“…where Z -F represents one field delay, Z -H respresents one line delay, 2-2 represents two sample delays, Z-H+2 represents two sample advances of one line dalay and M is the amount of estimated frame-to-frame displacement. For the R -Y and B -Y components, the three predictors are (6) These predictors are used for both the 15 Mb/s and 30 Mb/s modes. Note that the predictions are made on a subsampling basis which can directly be applied to 15 Mb/s mode.…”