[Mp4-tech] Byte Stream NAL unit decoding

[gopi krishnaiah]

Dear All,
Is it mandatory to have a start_code_prefix_on_3Bytes in the NAL byte stream?
When we start decoding byte stream NAL unit,
We first search for pattern 0x00 00 00 01.
Next byte is extracted and discarded since it is zero_byte syntax element.
Then the next 3 bytes should be start_code_prefix_on_3Bytes.
Using JM software and a test vector I observe following
But what I observe is that I get pattern 0x00 00 00 01,then some byte
patterns and then we get pattern 0x00 00 00 01 which marks end of
stream.
Is above interpreataion correct?
Regards
Gopi