## 6 Conclusions  
This paper presents a methodology for temporal analysis of 4K ultra-resolution video quality, allowing quantitative comparisons regarding the objective video quality metric of the SSIM. The results of using BCH-LDPC and RS-CONV encoders in different scenarios were analyzed and compared, considering the H.264 digital compression standard. These results contribute to research on variations in image quality during video transmission.  
The simulation results indicate that the BCH-LDPC encoder performed better on both AWGN and Rayleigh channels, demonstrating greater robustness in multipath environments. The BCH-LDPC/64-QAM system, with its average gain of over 78% in the SSIM metric compared to that of RS-CONV, has proven its adaptability even under adverse channel conditions and with higher spectral efficiency. These values provide clear quantitative evidence that the BCH-LDPC/64-QAM system can achieve video quality levels that are comparable or even superior to those of RS-CONV/QPSK. This robust performance under challenging conditions further supports the argument for considering the BCH-LDPC/64-QAM system for adoption in other existing systems, such as the Japanese ISDB-T standard.  
However, it is important to acknowledge that the proposed methodology has some disadvantages. For example, certain channel conditions or specific scenarios may have limitations that were not addressed in this study. Additionally, there may be additional costs associated with implementing the BCH-LDPC system compared to RS-CONV. Such considerations should be taken into account when evaluating the feasibility and practical applicability of this approach.  
The guidelines for future work need to be expanded to consider the disadvantages identified earlier. It is recommended that we explore the limitations of the proposed methodology in different application scenarios. Additionally, it would be interesting to investigate ways to mitigate or overcome these limitations, either by adapting the methodology or developing complementary techniques. These efforts can help enhance the applicability and performance of the proposed system in various practical situations.  
\begin{table}
\begin{tabular}{c c c c c c} \hline  & \multicolumn{4}{c}{AWGN} \\ \hline  & Tree & Crowd & Cross & Duck & Park \\ \hline QPSK & 1.75 dB & 3.37 dB & 2.67 dB & 2.82 dB & 3.56 dB \\ \hline
16-QAM & 2.81 dB & 3.74 dB & 3.36 dB & 2.81 dB & 3.23 dB \\ \hline
64-QAM & 3.02 dB & 4.65 dB & 3.95 dB & 3.34 dB & 4.06 dB \\ \hline  & \multicolumn{4}{c}{Rayleigh} \\ \hline  & Tree & Crowd & Cross & Duck & Park \\ \hline QPSK & 4.35 dB & 6.17 dB & 4.91 dB & 3.29 dB & 5.47 dB \\ \hline
16-QAM & 7.15 dB & 7.94 dB & 6.95 dB & 6.07 dB & 7.01 dB \\ \hline
64-QAM & 11.61 dB & 8.71 dB & 10.69 dB & 7.16 dB & 9.44 dB \\ \hline \end{tabular}
\end{table}
Table 7: Gain (dB) in mean PSNR of BCH-LDPC in relation to RS-CONV.  
**Author Contributions:** Conceptualization, T.d.A.C. and F.d.S.F.; methodology, T.d.A.C., A.S.M. and B.S.L.C.; software, A.S.M., E.M.C.M. and C.M.M.M.C.; validation, F.d.S.F., B.S.L.C. and F.J.B.B.; formal analysis, G.P.d.S.C.; investigation, T.d.A.C.; resources, T.d.A.C.; data curation, T.d.A.C. and A.S.M.; writing--original draft preparation, T.d.A.C.; writing--review and editing, T.d.A.C. and A.S.M.; visualization, T.d.A.C.; supervision, F.J.B.B.; project administration, F.J.B.B.; funding acquisition, T.d.A.C. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This study's publication fee was funded by PROPESP/UFPA and CAPES.  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** The data presented in this study are available on request from the corresponding author.  
**Acknowledgments:** Authors give thanks for all the support provided by the members of the Computer and Telecommunications Laboratory (LCT) at the Federal University of Para (UFPa).  
**Conflicts of Interest:** The authors declare no conflicts of interest.