[M4IF Technotes] Stuffing codewords

[Gary Sullivan]

To Sunggu Kim et al,
An MPEG-4 video decoder can figure out where precisely
is the last bit of non-stuffing data prior to a start
code by discarding the last zero in the stream and any
following 1's.  If there were no 8-bit stuffing codeword,
there might be some cases in which the decoder could
not easily identify whether the last bits of the stream
were stuffing or were actual coded content.
I think it's kind of a neat trick, although it does
add a little bit of overhead (an average of one bit
per start code).
-Gary Sullivan
+> -----Original Message-----
+> From: Kim, Sunggu [mailto:sgkim   logostek.com] 
+> Sent: Tuesday, October 23, 2023 8:06 PM
+> To: Mpeg4TechGroup
+> Subject: [M4IF Technotes] Stuffing codewords
+> 
+> 
+>   Dear MPEG-4 experts, 
+> 
+> In the MPEG-4 standard, I wonder why the stuffing codeword, 
+> 01111111(8bit), is necessary.
+> 
+> Thank you in advance.
+> 
+> Sungu Kim    
+> 
+> -------------------------------------------
+> Sunggu Kim
+> Logostek, Inc.
+> Seoul, South Korea
+> TEL: +82-2-3663-5855 
+> -------------------------------------------
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