https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950551#M18612 <DIV></DIV> <DIV><FONT size="2"> <P>Can you clarify? Does this mean that all JPEG codec calculations of the AC and DC coefficients in the IPP are Huffman entropy encoded and decoded in accordance with ISO/IEC-10918-1? If not, what other solutions are used?</P> <P>Thanks</P> <P></P></FONT></DIV> Tue, 14 Sep 2004 13:33:47 GMT figo 2004-09-14T13:33:47Z https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950549#M18610 <DIV></DIV> <DIV>Hello,<BR />I am doing JPEG decoding with the function DecodeHuffman8x8_JPEG.<BR />Can anyone describe how the calculation of the AC and DC coefficient tables and the RRRRSSSS coding are implemented in the IPP library?</DIV> <DIV></DIV> <DIV>Thanks</DIV> Fri, 02 Jul 2004 17:53:03 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950549#M18610 figo 2004-07-02T17:53:03Z https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950550#M18611 <DIV>Hi,</DIV> <DIV></DIV> <DIV>what do you mean? The calculations are made according ISO/IEC-10918-1. Is it answer you question?</DIV> <DIV></DIV> <DIV>Regards,<BR /> Vladimir</DIV> Mon, 05 Jul 2004 23:09:05 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950550#M18611 Vladimir_Dudnik 2004-07-05T23:09:05Z https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950551#M18612 <DIV></DIV> <DIV><FONT size="2"> <P>Can you clarify? Does this mean that all JPEG codec calculations of the AC and DC coefficients in the IPP are Huffman entropy encoded and decoded in accordance with ISO/IEC-10918-1? If not, what other solutions are used?</P> <P>Thanks</P> <P></P></FONT></DIV> Tue, 14 Sep 2004 13:33:47 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950551#M18612 figo 2004-09-14T13:33:47Z https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950552#M18613 <DIV>Hi,</DIV> <DIV></DIV> <DIV>On JPEG encoder side DC and AC coefficients are calculated through DCT, and after quantization they are Huffman encoded with using HUffman tables which built according with ISO/IEC 10918-1 (see Annex C, Huffman table specification). There is no other solutions if you want to build standard compliant JPEG codec.</DIV> <DIV></DIV> <DIV>Regards,</DIV> <DIV> Vladimir</DIV> Tue, 21 Sep 2004 19:47:21 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Huffman-decoding/m-p/950552#M18613 Vladimir_Dudnik 2004-09-21T19:47:21Z