Re: [wsjt-devel] Strange hash collision?

2019-01-15 Thread Bill Somerville
Hi Paul, it is a known defect in WSJT-X v2.0.0, already fixed for the next release. Note your callsign does not have a unique hash code, hash codes are a one-way function, a.k.a. lossy compression. Many callsigns can have the same hash code, the point is to represent a callsign using less

Re: [wsjt-devel] Strange hash collision?

2019-01-15 Thread Paul Kube
Bill, Then I don't understand why the hashcode for my call isn't used. It is known, or my call wouldn't be correctly decoded in those two received messages. Or so it seems to me. 73, Paul K6PO On Tue, Jan 15, 2019 at 4:11 PM Bill Somerville wrote: > On 16/01/2019 00:02, Paul Kube wrote: > >

Re: [wsjt-devel] Strange hash collision?

2019-01-15 Thread Bill Somerville
On 16/01/2019 00:02, Paul Kube wrote: But why is my call hashed wrong in my own Rx Frequency window? Hi Paul, hash codes are just numbers, what you see is a lookup of a table indexed by the hash code. The wrong call is being looked up and printed. There is nothing wrong with the hash code,

[wsjt-devel] Strange hash collision?

2019-01-15 Thread Paul Kube
Have a look at this QSO between me (K6PO) and K8CHY/4: [image: hashdecode.PNG] The strangeness is in my transmissions at 23 and 230030, where appears instead of . When my QSO partner's transmissions are decoded, appears as it should. I guess he was able to decode my transmissions all