diff --git a/includes/x393_parameters.vh b/includes/x393_parameters.vh
index 5059ccbf0e20f577883297971abaefc945be1a4f..4b73b4f8beec081ea95b7d3e8b403693404db7bd 100644
--- a/includes/x393_parameters.vh
+++ b/includes/x393_parameters.vh
@@ -680,19 +680,19 @@
 //      parameter CMPRS_CBIT_RUN_DISABLE =     2'h1, // disable compression of the new frames, finish any already started
     parameter CMPRS_CBIT_RUN_STANDALONE =  2'h2, // enable compressor, compress single frame from memory (async)
     parameter CMPRS_CBIT_RUN_ENABLE =      2'h3, // enable compressor, enable synchronous compression mode
-    parameter CMPRS_CBIT_CMODE_JPEG18 =    4'h0, // color 4:2:0
+    parameter CMPRS_CBIT_CMODE_JPEG18 =    4'h0, // color 4:2:0 3x3 de-bayer core
     parameter CMPRS_CBIT_CMODE_MONO6 =     4'h1, // mono 4:2:0 (6 blocks)
     parameter CMPRS_CBIT_CMODE_JP46 =      4'h2, // jp4, 6 blocks, original
     parameter CMPRS_CBIT_CMODE_JP46DC =    4'h3, // jp4, 6 blocks, dc -improved
-    parameter CMPRS_CBIT_CMODE_JPEG20 =    4'h4, // mono, 4 blocks (but still not actual monochrome JPEG as the blocks are scanned in 2x2 macroblocks)
-    parameter CMPRS_CBIT_CMODE_JP4 =       4'h5, // jp4,  4 blocks, dc-improved
+    parameter CMPRS_CBIT_CMODE_JPEG20 =    4'h4, // color 4:2:0 5x5 de-bayer core - not implemented
+    parameter CMPRS_CBIT_CMODE_JP4 =       4'h5, // jp4,  4 blocks
     parameter CMPRS_CBIT_CMODE_JP4DC =     4'h6, // jp4,  4 blocks, dc-improved
     parameter CMPRS_CBIT_CMODE_JP4DIFF =   4'h7, // jp4,  4 blocks, differential
     parameter CMPRS_CBIT_CMODE_JP4DIFFHDR =  4'h8, // jp4,  4 blocks, differential, hdr
     parameter CMPRS_CBIT_CMODE_JP4DIFFDIV2 = 4'h9, // jp4,  4 blocks, differential, divide by 2
     parameter CMPRS_CBIT_CMODE_JP4DIFFHDRDIV2 = 4'ha, // jp4,  4 blocks, differential, hdr,divide by 2
     parameter CMPRS_CBIT_CMODE_MONO1 =     4'hb, // mono JPEG (not yet implemented)
-    parameter CMPRS_CBIT_CMODE_MONO4 =     4'he, // mono 4 blocks
+    parameter CMPRS_CBIT_CMODE_MONO4 =     4'he, // mono, 4 blocks (but still not actual monochrome JPEG as the blocks are scanned in 2x2 macroblocks)
 
     parameter CMPRS_CBIT_FRAMES_SINGLE =   0, //1, // use a single-frame buffer for images