diff --git a/cfg/sei_vui/encoder_optimization_info.cfg b/cfg/sei_vui/encoder_optimization_info.cfg
index 76e4ac0862bd05dfd518ac0ddbc177c40c5e0cb2..f2d7c3ded976f405fa44ea407c1382877c6f0b4b 100644
--- a/cfg/sei_vui/encoder_optimization_info.cfg
+++ b/cfg/sei_vui/encoder_optimization_info.cfg
@@ -1,14 +1,17 @@
 #========Encoder Optimization Information SEI message =====================
 
-SEIEOIEnabled:           1
-SEIEOICancelFlag:          0
-SEIEOIPersistenceFlag:          1
-SEIEOIForHumanViewingIdc:          1
-SEIEOIForMachineAnalysisIdc:          3
-SEIEOIType:          39
-SEIEOIObjectBasedIdc: 0
-SEIEOITemporalResamplingTypeFlag: 1
-SEIEOINumIntPics: 2
-SEIEOISpatialResamplingTypeFlag: 0
-SEIEOIPrivacyProtectionTypeIdc: 0
-SEIEOIPrivacyProtectedInfoType: 128
\ No newline at end of file
+SEIEOIEnabled:           1              #Whether EOI SEI message will be generated  
+SEIEOICancelFlag:          0            #Whether the SEI cancel persistence of previous SEI
+SEIEOIPersistenceFlag:          1       #Does the SEI persist for one picture or till it is cancelled
+SEIEOIForHumanViewingIdc:          1    #Level of suitability for human viewing
+SEIEOIForMachineAnalysisIdc:          3 #Level of suitability for machine analysis task
+SEIEOIType:          39                 #Bitmask for type of optmiization applied
+SEIEOIObjectBasedIdc: 0                 #Bitmask for object based optimization type
+SEIEOITemporalResamplingTypeFlag: 1     #Type of temporal resampling (0: subsampling, 1: upsampling)
+SEIEOINumIntPics: 2                     #Num of added picture between two pics when temporal resampling type optimization is enabled
+SEIEOISpatialResamplingTypeFlag: 0      #Type of spatial resampling (0: subsampling, 1: upsampling)
+SEIEOIPrivacyProtectionTypeIdc: 0       #Type of privacy protection method that is applied (0: Undefined, 1: Blurring, 2: Replacing, 3: Masking)
+SEIEOIPrivacyProtectedInfoType: 128     #Type of privacy information that is protected
+                                        #0x01 : Person / face
+                                        #0x02 : vehicle
+                                        #0x04 : location
\ No newline at end of file