Motorola MOTOTRBO Analog vs Digital Audio Test

[Bill1977cgo1]

you can keep them mr king you suck

[djyuroon]

sorry, places 2times because I thought textspace left was too short

[djyuroon]

I don't know which speech-bandwidth is used but don't forget that already 100 years ago in the vaccuum-tube era... uncompressed analog voice had a voice-bandwidth in the range of 3500Hz through a phone-line. There is no development in analog technology anymore but I can still transceive analog with far superior soundquality in the same RF-bandwidth compared to digital. compressionless and 80dB SNR is easy

[djyuroon]

I don't know which speech-bandwidth is used but don't forget that already 100 years ago in the vaccuum-tube era... uncompressed analog voice had a voice-bandwidth in the range of 3500Hz through a phone-line. There is no development in analog technology anymore but I can still transceive analog with far superior soundquality in the same RF-bandwidth compared to digital. compressionless and 80dB SNR is not very difficult

[spymsn]

grandfathers wellcome to digital era, say goodbye to your vaccum tube radios or analog radios, yes digital sounds like ROBOT but is the digital era begining. In the past the AM sound has the "Hi Fi" now is DIGITAL!!!

[snookpudge23]

you could talk to nascar drivers XD

[dv6000hp]

Another thing, Just because a kenwood or mototrbo use AMBE vocoder, By DVSI, Does not mean they will talk to each other, its in the air interface were it happens. Efjohnson uses AMBE+2 and is backward compatibele with IMBE that motorola uses in there xts line.Again it in the air interface that matters, as far as compatability it is not necassarily the vocoder.

Y do people hate digital so much when they probably have never used a digital radio in there life.

[djyuroon]

Background noise suppression has nothing to do with analog or digital radio ! Jeroen

[26cab40]

nggrrrrnrwonfvv and out bwrrrrgnngginvvrrbbbggnnhhjjj by 5pm.

You just have to love cheap DSP processing and low bitrate codecs.

[dv6000hp]

Check out these samples. rayfield.net/MotoTRBO-Sound-Te­sts

Alot of negative and ill informed posts here. Alot of them hams (and im a ham) and scanner users. I work on and use analog and digital radio's everyday, its my job. And i am here to tell ya, you have to hear it to believe it. I myself was a bit sceptic, but i was blown away by Digital. HAM5043 says:"Bad thing is that the FCC is making all public safety depts. go Digital." Must be thinking narrowbanding is digital. LOL



[djyuroon]

@dv6000hp

We designed a much better soundquality than what Motorola makes already 10 years ago, we have however never produced it since it uses a different analog standard which makes it incompatible.

[djyuroon]

With the right configuration, analog is far superior to all digital solution I have heard. It is very easy and we may going to produce it in 2011. It is obvious that people are used to low-fi communication. As such, people seems to become outrageous (is this test sponsored?) when bad soundquality is a bit improved.. Let's face it, this demonstration demonstrates NOTHING.

[djyuroon]

Why isn;t the operator wearing a headset ? Connect a good headset to the analog radio and you can throw away the digital one. Why ? Because the DSP clearly cannot handle the low input SNR. That is the reason it sounds so crappy. And that is why also this test isn't realistic. The operator has to work and communicate, right ? Well he has to stop working because he must move down to use his speakermicrophone.

[djyuroon]

 If he was wearing a (VOX?) headset, he could continue his work whilst transmitting a clean soundquality.

[Polybun]

@djyuroon yeah, try fitting that under a hard hat. for that matter, try finding one loud enough to get through ear plugs and ear muffs. You boys have just no idea how loud things can get on a big fuckin' planer mill.

[djyuroon]

@Polybun no sir I am sorry. Its easy to blow through earmuffs. It is easy to produce 140dB SPL at 0.5cm from a 40mm speaker. So what is the problem ? @dv6000hp : to say something positive; the good thing of this digital system is that it is spectrum-efficient. That is where the focus is, and on the 2nd place -so it seems- is the sound quality.

[vvgna19gp]

the digital audio sounds very bad ,why on earth i would pay money to buy this crap?

[uploadJ]

Hmmmm ... no one seems to know about noise-canceling mics anymore.

COULD make the analog radio as readable as the digital, maybe even moreso since the codec won't be in play distorting the audio as it 'tries' to characterize the audio (like IMBE does) for low-data-rate transmission.

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[sparktastic1]

Wow, all that money for a portable with noise cancelling technology!!

Think of all the money you could save by buying a standard analogue radio and using a noise cancelling mic.. They have been doing this for years in aircraft and rotary wing aircraft.. It's not rocket science. This is just a slick marketing ploy by Motorola, to flog overpriced hardware to gullible consumers..

I don't know about you, but the highly compressed audio of the digital test sounded awful - Typical P25 crap!

[dv6000hp]

@sparktastic1 This was not a marketing ploy by Moto. The video was not made by Moto.It was true customer statements.I am not sure but most of videos or sound samples I have heard on the inet, seem to not sound as good as actully using one first hand, not sure if it is due to the sampling rate of the recorders used or what. But I use and listen to P25 digital everyday, and I personally cannot hardly listen to analog anymore.

"P25 Crap" hate to tell ya it is not even P25, Its Trbo TDMA.

[sparktastic1]

@dv6000hp OK, so granted, this was a demonstration of TRBO (P25 phase 2!).

So theoretically, it is also a demonstration of the 'latest' AMBE v2 vocoder. What bitrate are they using 9.6 or 4.8Kbps? Either way, it still sounds like crap!

People seem to forget that the best 'ASP' (analogue signal processor) out there for detecting human voice under noise, is the human brain! But, the human brain doesn't deal well with highly compressed or high BER digital audio. Therein lies the problem..

[WSGSD]

MOTOTRBO radios aren't worth the money. If you want the GPS feature, you pay for the software, which is in addition to the radio. The GPS map is kinda broad. Most street maps are better than what Motorola provides. With MOTOTRBO if you're too close to another radio you get an echo effect with the audio quality making it difficult to decipher. I'd NEVER use TRBOs for life critical usage (public safety). Use the HT series for portables & CDM series for mobiles. You won't regret it!

[glmiihai]

In Montreal, Canada the police want to have Mototbro radios. I think it is bad because it costs more the price here is about 1,200$ \a unit and i think that analog is better. Now they are using HT750 an HT1000. The single positive thing is that they have GPS. But, their cars alredy have GPS in them! Don't be fooled by these radios, analog is much more crystal clear! For, this price they could get here and XTS5000 wich 1000 times better!

[MaKaElectric]

St Louis City Missouri has a new P25 system and it SUCKS! I just don't get why they want digital so badly. We have always had some static in our 800mhz trs here in STL but most times was readable. As I am finding out now, that static is still there as they used the same freqs (don't ask me why) And now what do we have? BROKEN BITSTREAMS! Yes bad problem here in STL. I fear our officers are being put at risk.

[DAVZEE3]

fire commander may need to here background sounds as part of experience obtained in the front lines in order to make good judgement calls.

[DAVZEE3]

It seems as though in a close quarters environment, and where there is a lot of noise like in industrial settings the digi radio noise cancellation is much better. I'm not sure whether is is good in a large area public safety environment. some radio calls are recorded and needed in court proceedings so cancelling background audio can lead to lost evidence in some cases.

[qstx]

a nice radio...

[thecracken9]

remember trbo give you two voice paths over a 12.5 channel. 2 to 1 doubles your capacity. much better than analog... not to mention all the other features like gps, text, telemetry...... the future is requires spectrum effeciency only available with digital...

[zoltan656]

I don't understand is this radio transmit digital signal like digital TV or it is just analog FM with digital noise filter ???

[HAM5043]

No to Digital. I could not understand a thing he said on the digital radio. Analog radios are better. Better signal, better voice and just over all better! Bad thing is

that the FCC is making all public safety depts. go digital. I know my county is not ready at all for digital radios!

[RayAir1]

Digital is only good for providing privacy from scanners. I know P25 can be decoded by scanners, but not Pro Voice, TDMA, VSELP or other proprietary schemes like TRBO, NXDN, Open Sky, etc. I have used digital radios myself and the audio does sound different than analog.

[max2950]

Mototrbo is not proprietary, it is Motorola's implementation of the ETSI "DMR" standard...

[888asd00]

Analog any day. That digital audio sounds very compressed and unnatural. You would never be able to recognise know who it was that was transmitting.

Digital radio... look forward to a low-fi future.

[gopher2x]

imporved audio beacause of the 'digital vocoder system' ? more like digital signal processing before the audio is sent to the vocoder??

[max2950]

Yep, some DSP in the analog radio would do the trick, without this "Donald Duck effect"...

BTW, when talking about privacy : What the guys in this 3oregon Iron Works" are talking in their radio is a matter of national security ! Hich privacy is required ! lol -_- ;)

[lumina88]

I'm not really fond of digital radios, thats just my thoughts of it though.

[izu1370]

wow! nice digital audio, it actually cut the background noise and transmit only the clear audio of operator! really effective to noisy area. got to get 1 someday hehehe!!!