Re: Decoding JBK 6628 DVD Karaoke Disc

Some more patch findings:

Lyrics:
THE LOVE LINE IS NEVER STRAIGHT AND NARROW UNLESS YOUR LOVE IS
TRIED AND TRUE...

1100: 10 -> 9 ->> messup second screen lyrics
1101: b1 -> b0 ->> no effect
1102: 00 -> 01 ->> stuck on the second screen
1077: 26 -> 25 ->> no effect
107b: 02 -> 01 ->> no effect
1089: 2a -> 29 ->> no effect
10fb: af -> a9 ->> no effect
1184: 20 -> 21 ->> TRIE    D TRUE
1184: 20 -> 1f ->> TRI(ED slow) A -> random Chinese chars
1185: 05 -> 04 ->> no effect
1185: 05 -> 15 ->> TR(I very slow)
1185: 05 -> 09 ->> TR(I slow)
1186: 1a -> 19 ->> TRIE(@) AN    TRUE
118b: 05 -> 08 ->> TRIE(D slow) A   T
118b: 05 -> 06 ->> TRIE(D slow) random letters
118c: 19 -> 18 ->> TRIED  ND TRUE
118d: 10 -> 11 ->> TRIED messed up
118e: 1d -> 1c ->> no effect
118e: 1d -> 1e ->> no effect
118e: 1d -> 2e ->> no effect
118e: 1d -> fe ->> TRIE(D slow)
118f: 00 -> 01 ->> TRIE(D very slow)
1190: 51 -> 52 ->> TRIED A (new line) D TRUE
1191: 78 -> 79 ->> TRIED AbD TRUE   ->>>>>>>> this is interesting 1 byte change N -> b
1192: 02 -> 03 ->> no effect
1192: 02 -> f2 ->> TRIED messesed up
1193: 01 -> 11 ->> no effect
1193: 01 -> f1 ->> no effect
1194: fc -> 01 ->> TRIED AN (new line) TRUE
1195: 00 -> 01 ->> TRIED AN  TRUE
1196: 00 -> 0f ->> TRIED AN messesup
1197: 24 -> 34 ->> TRIED AND \n messesup
1198: 1F -> 2F ->> TRIED AND end
1199: F1 -> 21 ->> TRIED A(N slow)D (19B messedup

There's definitely timing code embedded, and seem like some sort of running sum/encoding because 1 byte change by 1 messedup the rest of the lyrics.

bigboss97, I'll try to do the patching on repeating lyrics song, maybe I'll find some pattern.  Cannot find any pattern in the songs with repeating lyrics by looking at the data alone (like "Tu Tu Tu Tu Tu Tu...")