The purpose of H.265/HEVC byte stuffing process

maxlovic · 24th June 2015, 07:41

Hello everyone!
Could someone please explain the purpose of byte stuffing process in H.265/HEVC. (sec. 7.4.3.10 and 9.3.5.7 of the specification). The number of bins in a coded picture shall be less than or equal to ((32/3)*number_of_bytes + (1/32) * rawBitSize).

To meet this condition a NAL unit can be padded with a number of cabac_zero_words.
What is the purpose of this procedure? It seems to never happen in a regular compression. Does it happen in lossless compression or scalable coding? Is it for the decoder to see if its CABAC throughput is enough to decode the picture or is it somehow used for error detection?

24th June 2015, 07:41	#1 \| Link
maxlovic Registered User Join Date: Jan 2012 Posts: 4	The purpose of H.265/HEVC byte stuffing process Hello everyone! Could someone please explain the purpose of byte stuffing process in H.265/HEVC. (sec. 7.4.3.10 and 9.3.5.7 of the specification). The number of bins in a coded picture shall be less than or equal to ((32/3)number_of_bytes + (1/32) rawBitSize). To meet this condition a NAL unit can be padded with a number of cabac_zero_words. What is the purpose of this procedure? It seems to never happen in a regular compression. Does it happen in lossless compression or scalable coding? Is it for the decoder to see if its CABAC throughput is enough to decode the picture or is it somehow used for error detection?