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Discussion Groups | Comp.DSP | 1QN representation


There are 17 messages in this thread.

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1QN representation - knight - 2008-09-17 07:36:00

Hi

how can i represent any number in 32 bit signed 1QN format..
Let it be -1.5


Re: 1QN representation - Randy Yates - 2008-09-17 10:40:00

knight <k...@gmail.com> writes:

> Hi
>
> how can i represent any number in 32 bit signed 1QN format..
> Let it be -1.5

What is "1QN" format?
-- 
%  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
%% Fuquay-Varina, NC            %            on, and she's also a telephone."
%%% 919-577-9882                % 
%%%% <y...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO   
http://www.digitalsignallabs.com


Re: 1QN representation - Ken Asbury - 2008-09-17 11:02:00

On Sep 17, 10:40 am, Randy Yates <ya...@ieee.org> wrote:
> knight <krshe...@gmail.com> writes:
> > Hi
>
> > how can i represent any number in 32 bit signed 1QN format..
> > Let it be -1.5
>
> What is "1QN" format?
> --
> %  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
> %% Fuquay-Varina, NC            %            on, and she's also a telephone."
> %%% 919-577-9882                %
> %%%% <ya...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO  http://www.digitalsignallabs.com

Both,

Google is your friend.

Regards.
Ken


Re: 1QN representation - Randy Yates - 2008-09-17 11:11:00

Ken Asbury <a...@yahoo.com> writes:

> On Sep 17, 10:40 am, Randy Yates <ya...@ieee.org> wrote:
>> knight <krshe...@gmail.com> writes:
>> > Hi
>>
>> > how can i represent any number in 32 bit signed 1QN format..
>> > Let it be -1.5
>>
>> What is "1QN" format?
>> --
>> %  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
>> %% Fuquay-Varina, NC            %            on, and she's also a telephone."
>> %%% 919-577-9882                %
>> %%%% <ya...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO  http://www.digitalsignallabs.com
>
> Both,
>
> Google is your friend.

Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
sifting through the results looking for the gold specks in a bunch of
dirt, and often they aren't there.
-- 
%  Randy Yates                  % "Remember the good old 1980's, when 
%% Fuquay-Varina, NC            %  things were so uncomplicated?"
%%% 919-577-9882                % 'Ticket To The Moon' 
%%%% <y...@ieee.org>           % *Time*, Electric Light Orchestra
http://www.digitalsignallabs.com


Re: 1QN representation - Ken Asbury - 2008-09-17 12:16:00

On Sep 17, 11:11 am, Randy Yates <ya...@ieee.org> wrote:
> Ken Asbury <avoidingspam2...@yahoo.com> writes:
> > On Sep 17, 10:40 am, Randy Yates <ya...@ieee.org> wrote:
> >> knight <krshe...@gmail.com> writes:
> >> > Hi
>
> >> > how can i represent any number in 32 bit signed 1QN format..
> >> > Let it be -1.5
>
> >> What is "1QN" format?
> >> --
> >> %  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
> >> %% Fuquay-Varina, NC            %            on, and she's also a telephone."
> >> %%% 919-577-9882                %
> >> %%%% <ya...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO  http://www.digitalsignallabs.com
>
> > Both,
>
> > Google is your friend.
>
> Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
> sifting through the results looking for the gold specks in a bunch of
> dirt, and often they aren't there.
> --
> %  Randy Yates                  % "Remember the good old 1980's, when
> %% Fuquay-Varina, NC            %  things were so uncomplicated?"
> %%% 919-577-9882                % 'Ticket To The Moon'
> %%%% <ya...@ieee.org>           % *Time*, Electric Light Orchestrahttp://www.digitalsignallabs.com- Hide quoted text -
>
> - Show quoted text -

Randy,
Geez, sorry to piss you off, man.
To save your having to waste time sorting down to the 8th Google item,
here's a link:
http://newsgroups.derkeiler.com/Archive/Comp/comp.arch.fpga/2006-02/msg00938.html


Knight,
Until your time is as valuable as Randy's, Google is your friend.

Regards,
Ken


Re: 1QN representation - Symon - 2008-09-17 12:41:00

"Randy Yates" <y...@ieee.org> wrote in message 
news:m...@local.localhost...
>
> Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
> sifting through the results looking for the gold specks in a bunch of
> dirt, and often they aren't there.
> -- 

Randy,

If you're having trouble finding things with search engines, you could try 
Googling for "How to google". In this industry, if you can't work a search 
engine, you're in big trouble.

If you can't be arsed to do that, here's a link. ;-)

http://sudarmuthu.com/blog/2006/05/07/google-search-syntax-dissected.html

HTH., Syms.

p.s. To the OP, I replied on C.A.F.


Re: 1QN representation - Richard Owlett - 2008-09-17 12:53:00

Ken Asbury wrote:
> On Sep 17, 11:11 am, Randy Yates <ya...@ieee.org> wrote:
> 
>>Ken Asbury <avoidingspam2...@yahoo.com> writes:
>>
>>>On Sep 17, 10:40 am, Randy Yates <ya...@ieee.org> wrote:
>>>
>>>>knight <krshe...@gmail.com> writes:
>>>>
>>>>>Hi
>>
>>>>>how can i represent any number in 32 bit signed 1QN format..
>>>>>Let it be -1.5
>>
>>>>What is "1QN" format?
>>>>--
>>>>%  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
>>>>%% Fuquay-Varina, NC            %            on, and she's also a telephone."
>>>>%%% 919-577-9882                %
>>>>%%%% <ya...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO  http://www.digitalsignallabs.com
>>
>>>Both,
>>
>>>Google is your friend.
>>
>>Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
>>sifting through the results looking for the gold specks in a bunch of
>>dirt, and often they aren't there.
>>--
>>%  Randy Yates                  % "Remember the good old 1980's, when
>>%% Fuquay-Varina, NC            %  things were so uncomplicated?"
>>%%% 919-577-9882                % 'Ticket To The Moon'
>>%%%% <ya...@ieee.org>           % *Time*, Electric Light Orchestrahttp://www.digitalsignallabs.com- Hide quoted text -
>>
>>- Show quoted text -
> 
> 
> Randy,
> Geez, sorry to piss you off, man.
> To save your having to waste time sorting down to the 8th Google item,
> here's a link:
> http://newsgroups.derkeiler.com/Archive/Comp/comp.arch.fpga/2006-02/msg00938.html
> 
> 
> Knight,
> Until your time is as valuable as Randy's, Google is your friend.
> 
> Regards,
> Ken

You're both right.
Google *CAN* be useful.
Google is often a *PAIN*!!!!
And you can't be sure which it will be until _after_ the search.

I've made a semi-hobby of outsmarting Google for the last 18 months.
One thing I've learned is precede all search terms with "allintext:" .
That limits hits to pages with search term in body of page. Otherwise 
some hits will be to pages which make a reference to pages which contain 
the search term. The art comes in choosing optimum boolean expression to 
get what you really want ;)


Re: 1QN representation - Randy Yates - 2008-09-17 12:53:00

Ken Asbury <a...@yahoo.com> writes:

> On Sep 17, 11:11 am, Randy Yates <ya...@ieee.org> wrote:
>> Ken Asbury <avoidingspam2...@yahoo.com> writes:
>> > On Sep 17, 10:40 am, Randy Yates <ya...@ieee.org> wrote:
>> >> knight <krshe...@gmail.com> writes:
>> >> > Hi
>>
>> >> > how can i represent any number in 32 bit signed 1QN format..
>> >> > Let it be -1.5
>>
>> >> What is "1QN" format?
>> >> --
>> >> %  Randy Yates                  % "She has an IQ of 1001, she has a jumpsuit
>> >> %% Fuquay-Varina, NC            %            on, and she's also a telephone."
>> >> %%% 919-577-9882                %
>> >> %%%% <ya...@ieee.org>           %        'Yours Truly, 2095', *Time*, ELO  http://www.digitalsignallabs.com
>>
>> > Both,
>>
>> > Google is your friend.
>>
>> Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
>> sifting through the results looking for the gold specks in a bunch of
>> dirt, and often they aren't there.
>> --
>> %  Randy Yates                  % "Remember the good old 1980's, when
>> %% Fuquay-Varina, NC            %  things were so uncomplicated?"
>> %%% 919-577-9882                % 'Ticket To The Moon'
>> %%%% <ya...@ieee.org>           % *Time*, Electric Light Orchestrahttp://www.digitalsignallabs.com- Hide quoted text -
>>
>> - Show quoted text -
>
> Randy,
> Geez, sorry to piss you off, man.
> To save your having to waste time sorting down to the 8th Google item,
> here's a link:
>
> http://newsgroups.derkeiler.com/Archive/Comp/comp.arch.fpga/2006-02/msg00938.html

Well, thanks Ken. I'm not pissed off, just expressing an opinion.

> Knight, Until your time is as valuable as Randy's, Google is your
> friend.

Perhaps we should all think like you, Ken? 
-- 
%  Randy Yates                  % "And all that I can do
%% Fuquay-Varina, NC            %  is say I'm sorry, 
%%% 919-577-9882                %  that's the way it goes..."
%%%% <y...@ieee.org>           % Getting To The Point', *Balance of Power*, ELO
http://www.digitalsignallabs.com


Re: 1QN representation - Steve Pope - 2008-09-17 13:00:00

Ken Asbury  <a...@yahoo.com> wrote:

>On Sep 17, 11:11 am, Randy Yates <ya...@ieee.org> wrote:

>> Ken Asbury <avoidingspam2...@yahoo.com> writes:

>>> Google is your friend.

>> Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
>> sifting through the results looking for the gold specks in a bunch of
>> dirt, and often they aren't there.

>Geez, sorry to piss you off, man.
>To save your having to waste time sorting down to the 8th Google item,
>here's a link:
>http://newsgroups.derkeiler.com/Archive/Comp/comp.arch.fpga/2006-02/msg00938.html

1QN seems to mean fractional two's complement in some proprietary
context.

The OP should use more standard terminology.  Participants shouldn't
have to google stuff like this up.

Steve


Re: 1QN representation - 2008-09-17 21:22:00

On Sep 18, 1:00 am, spop...@speedymail.org (Steve Pope) wrote:
> Ken Asbury  <avoidingspam2...@yahoo.com> wrote:
>
> >On Sep 17, 11:11 am, Randy Yates <ya...@ieee.org> wrote:
> >> Ken Asbury <avoidingspam2...@yahoo.com> writes:
> >>> Google is your friend.
> >> Bullshit. Half the time I google, I spend a SIGNIFICANT amount of time
> >> sifting through the results looking for the gold specks in a bunch of
> >> dirt, and often they aren't there.
> >Geez, sorry to piss you off, man.
> >To save your having to waste time sorting down to the 8th Google item,
> >here's a link:
> >http://newsgroups.derkeiler.com/Archive/Comp/comp.arch.fpga/2006-02/m...
>
> 1QN seems to mean fractional two's complement in some proprietary
> context.
>
> The OP should use more standard terminology.  Participants shouldn't
> have to google stuff like this up.
>
> Steve

I thought that was fairly standard terminology

Q15 == no integer part and 15 bits of fraction
Q31 == no integer part and 31 bits of fraction
1Q14 == 1 integer bit and 14 bits of fraction
1QN == 1 integer bit and all the remaining bits (however many they may
be) are fraction

All these kinda assume there is a sign bit as well. People don't often
express unsigned fixed point in this way. I wonder what might be
consider the appropriate shorthand way to say "no sign, no integer
part and 16 bits of fraction"?

Regards,
Steve


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