Re^9: encoding hdmi video byte

Just to clarify, is the proper interpretation of your OP that of Re^7: encoding hdmi video byte, or is it more like

Data byte D(0:7) encode this to make 9bit data q_m(0:8)
new      previous
bit of   bit of
q_m(0) =            D(0);
q_m(1) = q_m(0) XOR D(1);
q_m(2) = q_m(1) XOR D(2);
q_m(3) = q_m(2) XOR D(3);
q_m(4) = q_m(3) XOR D(4);
q_m(5) = q_m(4) XOR D(5);
q_m(6) = q_m(5) XOR D(6);
q_m(7) = q_m(6) XOR D(7);
q_m(8) =            1;
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Comment on Re^9: encoding hdmi video byte Download Code

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Re^10: encoding hdmi video byte by BrowserUk (Patriarch) on Feb 25, 2010 at 10:37 UTC
For the record. Once the translation tables are correct, whatever the proper encoding is, tr/// will process 1GB in 17 seconds, including the read and write time, Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "I'd rather go naked than blow up my ass"	[reply]
Re^10: encoding hdmi video byte by hdmiguru (Initiate) on Feb 25, 2010 at 17:13 UTC
Yes what you have said is correct. The encoding starts with taking the bit 0 (D[0]) of input data and that becomes the bit 0 of result (Q[0]). Then XOR the bit 0 of the result with bit 1 of input data. That becomes bit 1 of the result (Q1). Then XOR the bit 1 of the result with the bit 2 of input data. That becomes bit 2 of the result (Q2). Then XOR the bit 2 of the result with bit 3 of input data. That becomes bit 3 of the result (Q3). Then XOR the bit 3 of the result with the bit 4 of input data. That becomes bit 4 of the result (Q4). Then XOR the bit 4 of the result with bit 5 of input data. That becomes bit 5 of the result (Q5). Then XOR the bit 5 of the result with the bit 6 of input data. That becomes bit 6 of the result (Q6). Then XOR the bit 6 of the result with bit 7 of input data. That becomes bit 7 of the result (Q7). Th bit 8 of the result is always 1 (which indicates that we used XOR to the receiver). example input data 1010 0101 output data 1 0110 0011	[reply]