Is DSP useful?

[sharky]

I am Sharky

Hello Sean Goddard I am Sharky not the other name which u are pronouncing 2nd time

[sharky]

Bill Gates DSP TV

May be this is story like Bill Gates and 640k RAM for PC........ or Gramophone vs CD...
Candy Man
Sorry but is foolishly affirmation....

Microsoft fellows are going nuts, now they wanted to design a computer intergrated with TV with full computer based edting features along with running general progarms , electronics companies would laugh at this. what Bill Gates statement is they want to see all the features of software control like size of screen, color resolution etc etc, tomorrow they will try to go to military system and integrate the radar with windows with a pip movie, with scrolling web ads down, more of these silly gadgets to flood the market in near future.

A TV should be a TV good old CRT or LCD not the operating systems taking over or software companies taking over...

[sharky]

There are drawbacks. Power, PCB footprint, and, obviously, performance. My 2mA PI design uses chips that are all fairly recent (2-3 yrs). I could not have come even close to 2mA using vintage chips. Or fit the whole thing in 3 square inches.

But, in Hammerhead, I intentionally took the vintage chip approach, precisely for widespread availability.

- Carl

lets not speak of 2ma/size etc etc, try to concentrate on the front end, an international speck for Pi is it should detetc a cannonball in at at 5feet, options are later using dsp, lcd and power reduction...

[Mr. Bean]

Not the Sean

Microsoft fellows are going nuts, now they wanted to design a computer intergrated with TV with full computer based edting features along with running general progarms , electronics companies would laugh at this. what Bill Gates statement is they want to see all the features of software control like size of screen, color resolution etc etc, tomorrow they will try to go to military system and integrate the radar with windows with a pip movie, with scrolling web ads down, more of these silly gadgets to flood the market in near future.

A TV should be a TV good old CRT or LCD not the operating systems taking over or software companies taking over...

Hi Sharky,

Someone thinks I am u or u or me or someone else who

knows. Only Carl has the keys. addresses. anyway.

Yes yes yes you are soooo right and it can't be repaired

easy or at least cheap and so it all becomes dispossable

Junk after it breaks or rapidly becomes obsolete trash.

At the thousands of dollars level. automobiles same thing.

Someone comments that the modern automobile has more

radio and electronics in it than the home of 20 years ago.

So true. Then throw it in the trash. Sure is nice, just hope

this lead balloon can stay up in the air a bit longer.



Also agree with your specification of cannon ball at 5 feet.

yea make something perform first, then you can show you

can make it better.

Not sure why Carl is into the super low power thing, Nice to

have small light battery etc. to a point. But he is xmitting

50 ma but off for 25 times that period for average of 2 ma.

Off for 25 times the on time is a long time, first thing I

would do is crank down the off time and get more pulses in.

Well that is what went through my mind.

[Delbert grady]

T2

so what's the problem with T2 then. DSP and all that, but keep turning up on EBAY "just used 3 times"

[Carl-NC]

so what's the problem with T2 then. DSP and all that, but keep turning up on EBAY "just used 3 times"

Probably the same problem with all the other slightly used top-of-the-line detectors for sale.

[sharky]

Bill Gates TV Is Terrible

Hi Sharky,

At the thousands of dollars level. automobiles same thing.
Someone comments that the modern automobile has more....

Also agree with your specification of cannon ball at 5 feet.
yea make something perform first, then you can show you can make it better.

Vehicle applications need some electronics for monitoring etc, not windows opsys specially DotNet

Wonder if bill gates integrates a popcorn machine and soda machine into his computer enabled TV also a peltier effect frrezer integrated to cool the soda can with an onboard heatsink to cool his speed crunchy cpu, huh not his cpu it may be intels joining hands for monopoly doing a no fair trade apart from antitrust....
An company in India makes a PI with international speck air distance of 5 feet for cannon ball...and from my talks, its based or copied from this site

http://www.tvpredictions.com/gates012807.htm

[sharky]

Finalisation

We can use DSP for signal separation provided we do with the front end a more better, ther can be 2 models one with dsp and one without, the one with dsp should not have more of the analog filtering and wave separation for discriminating and speaker flyback cancellation.

Carl NC,this sites admin (wonder he is the same carl mooreland of hammerhead) has to prepare a HDLC in word format and need to post in the projects group and valid members have to give some suggestions to update correct this HDLC in a weeks time or so, and mean while the oscilloscope holders have to start testing the hardware, apart from the dsp people writing the initial code, use a high speed chip 40Mhz with 10kb memory, this is more than sufficient.

[sharky]

Windows PI detector

I think Gates is planning for a windows based PI for user simplicity, and new version programming....
Wonder if Bill Gates integrates a popcorn machine and soda machine into his computer enabled TV also a peltier effect frrezer integrated to cool the soda can with an onboard heatsink to cool his speed crunchy cpu, huh not his cpu it may be intels joining hands for monopoly doing a no fair trade apart from antitrust....
I think I have to stop smoking

[JC1]

Audio apps

More DSP evaluations as related to the Audio World.

Might apply to metal detectors as well.

And he says it better than I do.


In the end, it is completely pointless to expect a (relatively expensive) DSP system to compensate for poor driver selection or inadequate enclosure design in a loudspeaker. Increasing the amount of digital processing to attempt to compensate for bad drivers or poor design is false economy. Good performance is an end in itself, and if you have good drivers in well designed cabinets you should get very good performance from the system regardless of how it's driven. The DSP then can be used to perform time alignment, optimise the crossover and perhaps add a small amount of EQ to make the system as close to perfect as it can be.

It should be fairly obvious that using a DSP with cheap and/or poorly designed drivers, an incorrectly aligned enclosure, or other fundamental design issues cannot achieve the results obtained if everything is right beforehand. Simply failing to use the right amount of acoustic damping material in a speaker box will create issues that the DSP cannot "fix". Like wall reflections, internal box reflections are a function of time, and cannot be corrected with EQ. How can a DSP be expected to compensate for cone breakup effects, for example. These effects vary (in some cases unpredictably) with level and frequency, and are a physical manifestation of an inherent problem in the driver. DSP cannot correct this, as the complexity of breakup artefacts are more than can be handled by any current DSP.

According to the opinions of some, using DSP allows one to disassociate the physical loudspeaker, and simply use the DSP to get whatever result you desire. This is a fool's paradise - it completely ignores the laws of physics, and relegates reality to a secondary position. An untenable position at best.

Conclusion

There is no doubt at all that DSPs can achieve wonderful things for us in the world of audio. However, we must always remember that there are limitations. There are some things that the DSP cannot do - regardless of claims to the contrary. Always keep in mind that external time related issues can never be corrected by the DSP - they are outside the influence of the DSP, and nothing can change that (other than DSP controlled active wall surfaces - could be a tad expensive).

Having used a number of DSP based products, I can attest to how well they work, and the wonderful things you can do with them. The DEQX in particular is a spectacularly good product. It can actually make ordinary drivers almost sound good, but the key word there is "almost". Any deficiencies in the driver will remain, and any DSP can only ever do so much. The deficiencies may reveal themselves with increased distortion (especially intermodulation), beaming, cone breakup or poor transient response ... or a combination of any two or more of all the possible loudspeaker problems.

The DSP is a useful tool, and one that will become the standard in a few years. As performance improves, more things will be possible. However, modification of signals in the time domain by manipulation of the frequency domain will not become possible. Not even a DSP can break the laws of physics - despite the claims of hi-fi websites, salesmen, reviewers or other enthusiasts who may not fully understand what they are doing, or why.

http://www.sound.westhost.com/articles/dsp.htm

[sharky]

Physics Laws can be Broken

More DSP evaluations as related to the Audio World.

whatever result you desire. This is a fool's paradise - it completely ignores the laws of physics, and relegates reality to a secondary position. An untenable position at best.
modification of signals in the time domain by manipulation of the frequency domain will not become possible.


Not even a DSP can break the laws of physics -

Physics Laws can be Broken( broken means altered which is correct term u should use broken in physics), anything is possible, for eg u can even make Rf waves not to oscillate at 900/1800 mobile bandwidths,keeping other RF at other frequencies intact or u can even make quarth osc numb at the desired frequencies.
All this is ancient advanced technology....options are there to 'break' the laws say some thing which cant be broken and I can give u method on how to break it

[JC1]

Breaking the Law

Physics Laws can be Broken( broken means altered which is correct term u should use broken in physics), anything is possible, for eg u can even make Rf waves not to oscillate at 900/1800 mobile bandwidths,keeping other RF at other frequencies intact or u can even make quarth osc numb at the desired frequencies.
All this is ancient advanced technology....options are there to 'break' the laws say some thing which cant be broken and I can give u method on how to break it

Hi Sharky,

It says you can't break the law using DSP.

Now using ancient advanced technology I would have to

agree anything is possible. Too bad man didn't get more

of the ancient advanced technology to use today.

Hey I heard a story that man blew himself up with the

ancient advanced technology, and why we don't seem to

have too much of it now.

If you method to break it that would nice information for

everyone to have for their own personal use, and you

should post it up on forum for all to see.

[Aziz]

Many years ago, I also built a DSP board especially for this purpose. I had learned much about DSP programming and hardware design. I used the Analog Devices DSP ADSP 2181 with 40 MIPS. It was very interesting to play with this.
I spent a lot of money for this. Especially for the half europa format six layer PCB-board.

In those days, it was very expensive to develop DSP applications (compilers, testers, etc.).

I decided to break further development and gone with the personal computer (Notebook) solution.

Notebooks becoming very interesting and can be used much easier and cheaper. The fast development is the main advantage because you have all the tools, compilers, etc. for free.

[Altra]

DSP

Hello,
Thought some of you might be interested in Minelab's latest patent application. I have not studied it, but it appears to be a dual frequency circuit Using DSP to control the transmitter and to process the recieve signal.

The application number is 20070296415