+=====[ Packetization unit (PU) #1 ]====+
|           Video support box           |  SEP counter=0
+- - - - - - - - - - - - - - - - - - - -+  P counter=0
|        Color specification box        |
+- - - - - - - - - - - - - - - - - - - -+
|     JPEG XS codestream (1st field)    |
:             (part 1/q)                :  M=0, K=0, L=0, I=10
+---------------------------------------+
|     JPEG XS codestream (1st field)    |  SEP counter=0
|             (part 2/q)                |  P counter=1
:                                       :  M=0, K=0, L=0, I=10
+---------------------------------------+
:                                       :
+---------------------------------------+
|     JPEG XS codestream (1st field)    |  SEP counter=1
|            (part 2049/q)              |  P counter=0
:                                       :  M=0, K=0, L=0, I=10
+---------------------------------------+
:                                       :
+---------------------------------------+
|     JPEG XS codestream (1st field)    |  SEP counter=(q-1) div 2048
|             (part q/q)                |  P counter=(q-1) mod 2048
:                                       :  M=1, K=0, L=1, I=10
+===============[ PU #2 ]===============+
|           Video support box           |  SEP counter=0
+- - - - - - - - - - - - - - - - - - - -+  P counter=0
|        Color specification box        |
+- - - - - - - - - - - - - - - - - - - -+
|     JPEG XS codestream (2nd field)    |
|             (part 1/q)                |
:                                       :  M=0, K=0, L=0, I=11
+---------------------------------------+
|     JPEG XS codestream (2nd field)    |  SEP counter=0
|             (part 2/q)                |  P counter=1
:                                       :  M=0, K=0, L=0, I=11
+---------------------------------------+
:                                       :
+---------------------------------------+
|     JPEG XS codestream (2nd field)    |  SEP counter=(q-1) div 2048
|             (part q/q)                |  P counter=(q-1) mod 2048
:                                       :  M=1, K=0, L=1, I=11
+=======================================+