DSD 1.3 and mbelib 1.2 released

[js_scan888]

I left out an important part in my previous message. Each bit in the pseudo random bit stream will be applied to every other bit in the voice data.

So starting at bit 181 (index 180 in array) the 144 bit pattern is:

10010001010000101011010011111101100100100101101111
11001001101010011001100000001100011001010001101001
01111111010001011000111010110010110011110001


Which would invert the indexed voice array bits at the following locations:
0 6 14 18 28 32 36 38 42 48 50 52 54 56 58 62 64 70 76 82 86 88 92 94 96 98 100 102 108 114 116 120 124 130 132 138 140 156 158 166 168 174 178 186 188 192 198 202 204 206 208 210 212 214 218 226 230 232 240 242 244 248 252 254 260 264 266 272 274 276 278 286

So that would be 72 out of the total 288 inverted back to normal.

 

[dsdauthor]

I left out an important part in my previous message. Each bit in the pseudo random bit stream will be applied to every other bit in the voice data.

So starting at bit 181 (index 180 in array) the 144 bit pattern is:

10010001010000101011010011111101100100100101101111
11001001101010011001100000001100011001010001101001
01111111010001011000111010110010110011110001


Which would invert the indexed voice array bits at the following locations:
0 6 14 18 28 32 36 38 42 48 50 52 54 56 58 62 64 70 76 82 86 88 92 94 96 98 100 102 108 114 116 120 124 130 132 138 140 156 158 166 168 174 178 186 188 192 198 202 204 206 208 210 212 214 218 226 230 232 240 242 244 248 252 254 260 264 266 272 274 276 278 286

So that would be 72 out of the total 288 inverted back to normal.

Thank you! NXDN 9600 voice works now. I need to fix some of the framing code and should have an update released this weekend.

It looks like there are two different sync words used, do you know what they are called? One is obviously for voice frames, is the other called 'data' or 'control' or some other name?

I still need to get a radio programmed for 4800 baud or some .wav samples from one to add NXDN48 (and IDAS) support.

 

[js_scan888]

No, not sure about that. I just know about ETSI TS 102 490 from the technical spec, and noticed that both formats share some similar characteristics.