Abstract:The effects of the IP bearer network’s transport damage to IPTV media quality is reflected by Media Delivery Index (MDI). After the study of the MDI testing methodology mentioned in RFC 4445, an innovative idea is put forth to adopt the differential method in MDI:DF testing: subdivide the testing interval into many more micro intervals, and from the angle of implementation improvement is made to the original algorithm, on the basis of which the AFPGA-based MDI testing solution is proposed and its simulation result is given. The approach not only reduces the calculation factors but also decreases the complexity of the hardware implementation. The solution has already found application in the portable IPTV testing instrument and gives a constant good performance.