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Most Hackable Coupon-Eligible DTV Converter?
An anonymous reader writes "So I've finally gotten my DTV coupons, now I have to choose a converter before the analog signals go dark. I'd like to get one that is hackable, but haven't had much luck finding information about the internals of the units available. My question is: What chipsets do the different coupon eligible converters use, and which one is the most hackable? It'd be great to be able to send my own MPEG stream and have it displayed, or to grab the raw stream out of the device."
There's really nothing on.
It's kind of impossible to get a useful answer to your question on Slashdot... You see, if someone gives you a valid link to something that is actually useful, it gets modded up. It will immediately sell out, and you're back to square one. :-)
WHY would you want to waste your time even doing that? What's the point? There are DTV tuners on USB sticks that are likely easier to hack than some single-purpose hardware like these converter boxes!
Yes, but then you can only play VHS tapes. :-)
Not quite what you asked for, and I don't know if you can use your coupon (I'm guessing not)... but the HDHomeRun allows you two capture MPEG streams. It integrates well with MythTV. It has an open source library. Pretty sweet little device in my opinion.
perhaps you should throw out your coupon or give it to someone who can't afford to purchase one and missed getting a coupon. If you're looking to hack something you should use your own money to buy one and not mine.
Thank you.
Paying taxes to buy civilization is like paying a hooker to buy love.
>poor disadvantaged people
Well, from a relationship standpoint, slashdotters fit the bill.
And shush, you'll let the po-po know about his scheme.
Why is this tagged republicans? Did I miss something?
Why bother hacking one when you can get an HDHomeRun that has dual-tuners and it is networked across ethernet! Now it won't directly hook up to any TVs or what not, just computers. MythTV and other favorite software suites works with it just fine. It does have a $180 USD price tag though last I checked of which makes it out of your reach if you're having to get a coupon for a DTV converter box...
This space is not for rent.
Tivax makes a converter box which is only about $15 with a rebate card and has a serial port on the back. I got two of them with my coupons. You can control the unit through the serial port (turn on, change channel, zoom, etc). You don't get access to the digital signal, what you get is a good quality analog picture at standard resolution, which your analog PVR can record. For me this was what I wanted; the HD stream itself is a deluge of data; you really don't want to capture it at full-res if you'll be watching on an SDTV. (In fact my old PVR box isn't fast enough to replay full HD video streams, it requires considerable CPU). I am using wish scripts to send the serial commands. Perhaps somebody has written code for MythTV to use it by now.
I wouldn't count on that.
Yeah, yeah, they're killing the analog broadcast because they need the frequency. Yeah, sure. In Europe, we're "ahead" of the times again, we got our digital boxes, our analog signals were shut down and the frequency ... well, did they find someone already to buy it? I dunno.
At least part of the reason to switch to the artefact-ridden compression-fest that digital TV is, is simply that it offers more chance to get some kind of DRM into the stream. And for this your chances to a hackable box decrease over time, when they find and patch more and more holes.
Older, hackable, boxes, i.e. the ones you buy now, might be grandfathered because they don't want this rollout nightmare to happen again.
We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
For the chipsets used, you can check the Wikipedia page: http://en.wikipedia.org/wiki/Comparison_of_CECB_units .
But as to hackability, I seriously doubt that ANY of these unit are sophisticated enough to run a real OS with some hacking potential. If you're a hardware wizard, you might be able to do something, but I don't see the value in spending lots of time trying to hardware hack a box which costs $10-$20 out-of-pocket.
Nope, the coupons were to mitigate the ass-pain caused by having to go out and buy one at all. There are still plenty of people who don't have satellite or cable, even though they can afford it, because they only watch the weather in the morning and the news in the evening or some such. To them it's an added expense for no added benefit; hence the ass-pain mitigating coupons.
Violence is like duct tape. If it doesn't solve the problem, you didn't use enough.
The little Apex 502 is one of the few coupon eligible converters with S-video out.
If you have a TV or monitor with S-Video inputs, you'll get a better picture than using RS170 composite video (and much better than CH3/4 RF)
1. In the US the spectrum is already sold
2. I highly doubt that we'll be seeing DRM on broadcast television any time soon.
As far as using the output, there are ATSC converter boxes that can interface with the TiVo Series 2. Likewise, they could interface with anything that can accept composite or S-video and output IR signals.
Blonder Tongue makes ATSC demodulators that can work via Web or RS-232, but I doubt they're coupon-eligible, and like any professional AV equipment, the stuff is heavy, rack-mountable, heats up like a kiln, and will cost a li'l bit.
Your best bet is probably an ATSC capture device that works with MythTV. I won't begin to name any, since there are plenty out there. :-)
What are you talking about? There are no "holes" to be patched--MPEG2 transport streams are unencrypted. Though I don't doubt that content owners would surely love to impose DRM on broadcast content, it's simply not provided for in the ATSC specifications for MPEG2 over-the-air transport streams.
The infamous Broadcast Flag--the only element of DRM to have ever loomed over broadcast television--is dead and buried. Besides, none of the DTV converters currently available have any DRM-compliance built in.
Barring the highly unlikely event that Congress decides to modify the ATSC spec after tens of millions of TVs with DTV tuners are owned by consumers, there is zero chance of DRM becoming an issue with digital television programming.
Check out the Dish Network box. I admit, I haven't had a chance to actually try to use one of these, but the video I've seen of them in use looks really similar to their set top box firmware. Could just be some sort of theme though...
There was nothing in the program about it being for poor disadvantaged people. They are for anyone affected by the lack of analog OTA signals. If you were affected, you were eligible. You just assume that anyone who still uses OTA signals rather than cable of satellite is poor and disadvantaged.
I'm the happy owner of an HDHomeRun. It's a fantastic device, and I highly recommend it, but it's not a coupon-eligible converter. Normally, I would say to chuck the coupon aside and get it anyway, but the reason why the HDHomeRun isn't coupon-eligible is its lack of an RF output. You have to get the stream off the network, you can't connect it straight to the tv.
Now, I have a mythtv box connected to my TV, so that's not an issue for me. If you have a computer serving as a media center I most definitely recommend it, but if you just want the streaming as a bonus, and still want RF output, then it's not for you.
Again, this is not a criticism of the device. I absolutely love mine, and I highly recommend it to anyone looking for a way to stream unencrypted HD to their computers. Silicon Dust also has excellent forum support to help you set it up if you need it. However, if you want a converter box to hook directly up to your TV, this is not the device for you.
>The infamous Broadcast Flag--the only element of DRM to have ever loomed over broadcast television--is dead and buried. Besides, none of the DTV converters currently available have any DRM-compliance built in.
You must be using a meaning for 'dead and buried' that I'm not aware of.
If this were so, then there would be no way to turn it on. And if it were turned on, then nobody would looking at this flag. Neither is true. Otherwise, the Microsoft debacle (is that redundant?) would not have happened.
http://news.cnet.com/8301-10784_3-9946780-7.html
And big media are working hard to close the analog hole ASAP. Like their recent application (which was denied) to disable DVR's and analog outputs in exchange for letting people see movies in HD earlier than they have been releasing them to TV now.
And aren't HD analog outputs going to be turned off in 2010 or 2011?
Just make sure you get a converter box with Component Video out (also called YPbPr). Then you can use the Hauppauge HD PVR http://www.hauppauge.com/site/products/data_hdpvr.html to capture the hi-def video to a hard drive.
This is a solution that works for any HD settop box no matter what copy protection it provides, so long as it outputs component video.
At least part of the reason to switch to the artefact-ridden compression-fest that digital TV is, is simply that it offers more chance to get some kind of DRM into the stream. And for this your chances to a hackable box decrease over time, when they find and patch more and more holes.
Europe != the United States.
Listen. The word "switchover" is kind of a misnomer. We're not switching "over", we're just switching "off". We've already got digital signals and have had them for years. That's how people get OTA HDTV. The standards are defined, the signals are being broadcast. All we're talking about doing here is turning *off* the analog broadcast. The digital feed is a known quantity.
Digital broadcasts in the United States are much, much better than their analog equivalents. You won't be getting HDTV with one of these converter boxes, but you'll be getting the SD sub-channel, which has the advantage over analog of zero static. There is nowhere that anyone who watches analog TV can claim that. Personally, I don't see any compression artifacts at all on OTA digital broadcasts, HD or SD, although obviously the SD channels are lower in resolution than the HD ones. Over the air digital broadcasts, which is what these converter boxes are for, are actually the only way to get a full-bandwidth signal currently. (All of the cable and satellite companies molest the signal in various ways to maximize bandwidth.)
And there's absolutely no DRM on OTA digital broadcasts. The industry tried to add some by asking the FCC to mandate a "broadcast flag", but that went nowhere. OTA signals are DRM-free - some *may* have the flag in a vain hope that the receiving hardware will respect it, but no currently-produced receiving hardware that I know of does. And I doubt any of the stations bother even inserting the flag anymore.
Older, hackable, boxes, i.e. the ones you buy now, might be grandfathered because they don't want this rollout nightmare to happen again.
They're not "rolling out" digital. It's already here. All this program is supposed to do is help people who haven't already upgraded, even though they've had about ten years to do so already.
No offense, I think hacking a DTV converter is a neat idea, but I think you've unwittingly highlighted a major problem with the DTV coupon program. I think the program was generally intended to ensure that people in fixed/low income situations would be able to receive television signals after the transition. Instead, the majority of coupons have been redeemed by early adopters/geeks who generally do not need a dtv converter in the first place or would have been able to afford one without a coupon. In my experience, most of the people I know that need a converter did not even know about the program -- the only ones who knew about it were fellow techs who haven't had an analog TV in years.
Now we have people (most notably the Obama administration) stating that the DTV deadline because the coupon program is out of funds and those very people that program was designed for *still* do not have a coupon or a converter.
So my question is: if this is just some "for the fun of it" lark that you're going on with these DTV converters, don't you feel like it was at least slightly unethical (or at least a violation of the spirit of the program) to get a hand-out from the government?
Digital broadcasts in the United States are much, much better than their analog equivalents. You won't be getting HDTV with one of these converter boxes, but you'll be getting the SD sub-channel, which has the advantage over analog of zero static.
That's because the digital signal simply breaks when static is encountered, as opposed to analog which degrades gracefully. Digital transmission does provide a lovely image, often better than cable, but only when the signal is strong; analog has a far wider reach, which is very important for anybody not in the middle of a city.
Digital in general gives a nice sexy picture and compression artifacts aren't any worse than static. Pauses, skips, and audio sync issues on the other hand are absolutely unacceptable and they plague digital video (broadcast or otherwise). I'd rather have a constant static level that your mind ignores than pauses, skips, or audio sync issues.
On the other hand, OTA analogue tv isn't exactly on par with the static on an older vhs tape, its generally unwatchable.
Nope, the coupons weren't welfare. They were compensation. FCC enforced an expense on the public, made billions of dollars. Part of that is going back to the citizenry that supposedly 'owns' the airways.
Some people have been mentioning DTV tuners with Firewire other outputs. Under the law that enabled the coupons, only RF, composite, and possibly S-Video output is allowed on subsidized converters. See #54 here.
Except static on OTA analog lets the signal still be somewhat watchable.
Poor reception on OTA digital = no signal at all.
Yea, they may extend the deadline because some idiots didn't get ready for it and might be inconvenienced. And those exact same idiots will not be ready in 3 months, 6 months or 2 years when they eventually get around to doing the analog cut-off.
I'm an American. I love this country and the freedoms that we used to have.
And the odds of him finding something "tweakable" with that coupon is pretty much zip, so the whole article is a wash. But if he really wants something to play with that involves his coupon here is what he should do IMHO-
1. buy converter box with coupon. 2. Now that analog is being phased out you can get analog capture cards REALLY really cheap, $5-15 depending on where you get it from, so 3. Get a really cheap analog capture card and connect it to the output of the converter and then 4. Have fun streaming video, capturing shows, or making a DVR.
Because from what I've seen of these boxes there really isn't enough guts in them TO hack, they are just primitive D/A converters. But I've been picking up analog capture cards really cheap and my customers are having a lot more fun with those than with anything you can do with those boxes. Those old Brooktree and Philips chipsets used in capture cards have been around for so long there are thousands of freeware and FOSS out there that can interact with it, and pretty much anything over 1GHz can run them just fine(in fact have a customer with a 900MHz Athlon that uses one to listen to radio and watch the news in his SOHO) so I'm sure this guy has SOMETHING with a PCI slot lying around. So if he really wants something to play with cheap a $5-15 capture card wired into the converter will give him more than all the specs in the world on those converter boxes would. Because there just isn't enough guts in them to hack one of those things.
ACs don't waste your time replying, your posts are never seen by me.
You're mixing up Blu-Ray DRM with ATSC digital broadcasting. The "analog hole" with respect to unprotected outputs won't ever be disabled by broadcasters because the broadcast flag has been ruled enforceable. The article you link to specifies that MS merely chose to voluntarily comply with the flag, but there is no penalty for circumventing it and nearly every converter out there ignores it.
Nope, the coupons were to mitigate the ass-pain caused by having to go out and buy one at all. There are still plenty of people who don't have satellite or cable, even though they can afford it, because they only watch the weather in the morning and the news in the evening or some such. To them it's an added expense for no added benefit; hence the ass-pain mitigating coupons.
Yes, there are still plenty of people, all 13 million of them. Of course, we should cater to those 13 million in the face of the other 313 million that DON'T use the analog frequency, which could be put to better use for THOSE people.
Yes, makes perfect sense - cater to the tiny minority to the detriment of the vast majority.
Everyone is getting it for the fun of it. No one needs to watch TV.
Sigh. Not your fault, but yours is the first post I've seen that actually tries to answer the question. To find your post I had to skim past 100 posts that say things like:
I swear, Slashdot conversations get more and more solipsistic every day.
At the time, I was recording from Comcast. They make extensive use of the broadcast flag, and ever DVD player I tried out obediently did exactly what it was told and refused to record when asked not to.
So, yea, the broadcast flag is alive and well, and used pretty much by all the service broadcasters (Comcast, Verizon FIOS, Time Warner, Dish, etc.).
But for for over-the-air TV, not only is there no broadcast flag, but re-broadcasters of local stations are banned from scrambling them.
"Somebody has to do something. It's just incredibly pathetic it has to be us."
--- Jerry Garcia
And there's absolutely no DRM on OTA digital broadcasts. The industry tried to add some by asking the FCC to mandate a "broadcast flag", but that went nowhere. OTA signals are DRM-free - some *may* have the flag in a vain hope that the receiving hardware will respect it, but no currently-produced receiving hardware that I know of does. And I doubt any of the stations bother even inserting the flag anymore.
Is this really true? I've been reading the AVR Forums for the last few months and apparently there are a lot of situations where the Broadcast Flag is being set. You wouldn't think that this is a problem, except that a lot of the DVD recorders on the market today do honor the flag and will only record programs that have it set onto DVD-RAM media (since that's the only media which supports recordable content rights managment). This has caused a lot of DVD recorder owners heartburn when they try to use DVD+/-R/W media and the recorders refuse to write to it when they spot the broadcast flag set.
In fact one of the most annoying situations is when the main program _doesn't_ have the flag set, but one of the commercials _does_. Then the recorders will bail out partway through the session when they see the flag set on the commercial.
Though I don't doubt that content owners would surely love to impose DRM on broadcast content, it's simply not provided for in the ATSC specifications for MPEG2 over-the-air transport streams.
Actually, the ATSC spec does allow any abitrary types of packets to be inserted into the stream. These could be used for DRM authorization, etc. The ATSC spec as adopted by the FCC is a more relevant link, as is the conditional access specification, which specifically deals with this sort of thing.
But, the FCC requires that the OTA broadcast be unencrypted, so normal MPEG-2 that is receivable by all will be there as long as the FCC controls the station license.
The upshot of this is that nothing prevents a station from sending a 480i MPEG-2 stream as the unencrypted one, and adding an encrypted MPEG-4 1080/60p stream for paying customers. At this point, only market forces (in particular, network affiliations) will keep this sort of thing from being the standard for OTA TV in the US.
yeah I tend to agree. I live in an apartment where my analog channels weren't perfect but were watchable (and audible), even with static. I get quite a bit of interference on and off and it's rather annoying when a digital signal cuts or has problems and the sound goes out entirely (even if the picture is just blocking)until it picks back up (sometimes the picture as well). It's quite a bit different than getting a bit of static (or even a big burst of static) in the picture and sound on an analog channel where it may be annoying but I don't miss anything (less it goes completely out).
To me the sound is the most annoying aspect and almost seems like there is less tolerance there. Then again, digital cable isn't much better either, in fact its worse because of the higher compression and more outages I have gotten with it. In the cable arena I preferred analog over digital by far. As far as over the air, the quality of the picture and sound is so much better when it comes in, but there really does seem to be less tolerance for when it doesn't. Video and sound with some static in them is much more followable to me (maybe just me) than blocking video or sound that cuts out entirely.
Again, I live in fairly old apartments. Another thing to consider is that with the frequencies that analog used, many were more resilient than what digital uses. Basically the VHF channels are probably what most people use to compare analog to digital. Since digital is closer to your UHF channels (which could be non-existent due to interference in some places) the only real comparison is with them. Basically the digital signals will only be as good as the weaker set of the analog signals. Going by that, digital (based on frequencies used as opposed to method used) is probably going to be worse in many cases than people used to watching VHF channels alone.
In other words, NBC/CBS/ABC, given a user with weak UHF before and similar power output by the stations, is going to be worse than before as far as interference because it's no longer in the VHF spectrum. I consider it worse when I cannot follow the show (sound cutting off or the screen blocking where I cannot see the picture compared to sound with static and a picture with static - since I can follow a scene with quite a bit of static) So saying that over-the-air HDTV is better than over-the-analog (or vice versa) is really just BS since it's apples and oranges (unless you leave out VHF, which was the meat of analog). That's also why DTV antennas are so similar to UHF antennas.
And it is gospel truth, in my experience.
I get many analog signals here with just a simple whip antenna.
I get exactly ONE digital station.
And I get exactly one station even when using an outdoor broadband amplified antenna.
A snowy analog signal provides a lot more information and is a lot more viewable than a black screen showing only "no signal" in tiny white letters. I'd call that a lot more graceful.
The infamous Broadcast Flag--the only element of DRM to have ever loomed over broadcast television--is dead and buried. Besides, none of the DTV converters currently available have any DRM-compliance built in.
Not quite "dead and buried" - turns out that some broadcasters are using it anyway and some tuners are obeying it anyway. In fact, our buddy Microsoft is lead the charge.
So, while the BF remains voluntary, that doesn't help the poor schmucks who get stuck with a system that has "voluntarily" given away their option to ignore the BF.
Not quite "dead and buried" - turns out that some broadcasters are using it anyway and some tuners are obeying it anyway. In fact, our buddy Microsoft is lead[ing] the charge.
Not just Microsoft. The last time I tried to record a college football game from KLKN-DT, it was flagged "Copy Once". I could get neither VLC nor MPEG Streamclip on my Macintosh to play the resulting recording. I could however play recordings from the same game broadcast on KETV-DT that were marked "Copy Freely". Recording application was AVC Video Cap (which requires recompilation with patches to do delayed timed recording as of 2009, left as an exercise for the reader).
Oh, say does that Star-Spangled Banner entwine / The myrtle of Venus with Bacchus's vine?
My "old-fashioned" analog Super VHS laughs at broadcast flags and records DVD-quality video to boot.
FOX NEWS.com should be BANNED from television and internet. Have the Congress take it over and give us Truespeak.
Actually, Digital has a wider reach with the same power output which is why most stations have had power greatly reduced from their analog to their digital transmitters. Unfortunately, DTV is very susceptible to multipath (you see this as "ghosting" in analog, with a low-grade digital receiver, you see this as "no signal") and in many places, with the lower power required for interference prevention with neighbors, the coverage becomes reduced.
Video Production Support
>>>At the time, I was recording from Comcast.......So, yea, the broadcast flag is alive and well, an
Comcast is not broadcast you twit. It's narrowcasting via a cable, and has nothing to do with what we're discussing (over the air broadcast).
FOX NEWS.com should be BANNED from television and internet. Have the Congress take it over and give us Truespeak.
This is, of course, bullshit, at least in my experience.
But not in my experience.
We are in a valley with no line of sight to TV transmitters. Out analog TV signal is marginal. Digital TV works most of the time, but depending on the weather it can break up or just go dead. So then we switch back to analog, fuzzy but still watchable.
Still, the best target for a hackable box would be one from a company that produces a more powerful box, especially if there's very little if anything to distinguish them from the outside other than open holes in the backplate. To reduce cost of production, they might just have parts and not the ports, or the parts may be installable by a technically skilled end-user.
A case in point was a TV with a remote that had no digit buttons. The traces were on the board inside, it would send the signals if a button would make the connection, and the TV would respond, but the remote just didn't provide the buttons and the holes were covered over. I also discovered an old 2-13 monaural VCR that would respond to the digit buttons of a more modern VCR's remote (button 1 was channel 2, 2 was channel 3, etc., and 0 was channel 11, but nothing would get 12 or 13).
Many early cable boxes would have had Firewire out if they'd just installed the ports, a couple standard chips to the board, and applied a patch to the firmware, and if it wasn't a felony to open and modify them people would have.
Oh, say does that Star-Spangled Banner entwine / The myrtle of Venus with Bacchus's vine?
To add to the anecdotes, I plugged in the converter box I bought today, and I'm missing several digital channels that I get perfectly over analog.
Oh, and the 4:3 signal output by the converter box has black bars on all four sides for almost every channel on my TV. I'll be conservative and blame the TV, though, since it's fairly ancient (relatively speaking).
>>>you'll be getting the SD sub-channel, which has the advantage over analog of zero static. There is nowhere that anyone who watches analog TV can claim that.
(1) I can. The stations within 20 miles of my house, NBC8, FOX43, CW15, and ION49 all appear without static. In fact, they look *better* than their digital counterparts (which are artifacted).
(2) I had to spend $200 on a new rooftop antenna since the old settop rabbit ears/loop antenna got next-to-nothing.
(3) Stations beyond 50 miles admittedly look like crap, but at least they're watchable in analog format. DTV displays nothing. I've lost channels 10,11,12,13,21,27,29,45,48,51. I used to be able to watch Ravens and Orioles games but no more. I lost my PBS station and my ABC station and a few independents that played movies or scifi shows.
Remind me again about how DTV is "superior" when I've lost more than I had before?
FOX NEWS.com should be BANNED from television and internet. Have the Congress take it over and give us Truespeak.
With the ever changing landscape. What would be a good worldwide capture card that would work for all standards both terrestrial and satellite that uses the PCIe x1 slot?
Shai Schticks:"You don't make peace with friends, you make peace with enemies"
mencoder will gladly strip that flag. run it through mencoder with no processing. it by default removed the evil bits.
I do this all the time with lots of streams I snag from Comcast QAM feeds. windows apps will obey the evil flags, I prefer to violate them.
Do not look at laser with remaining good eye.
In case any of you are interested, I took photos of my teardown of the Zenith DTT900, one of the first available DTV converters, available here: http://nuxx.net/gallery/v/acquired_stuff/zenith_dtt900/.
Here or here or here if you want an older All-In-Wonder with S video. There are plenty of choices right now in the $15-$20 range and most have nice features like remotes and MP4 capture so you can take your time and get the features that interest you. I just checked and I'm afraid the place where I picked up a couple for $5 each has sold out, but the Sabrent and Kworld cards I have placed into customers computers in the past and they are quite happy with them. I myself picked up an "Easy TV FM" for $15 which I watch cable and listen to the radio with.
they are quite fun to play with and you can add Media Portal if you have XP to make a really cheap media center. Some prefer Xbox Media Center for Windows but I've had better luck with Media Portal. Anyway I hope this helps, and have fun!
ACs don't waste your time replying, your posts are never seen by me.
In the language of the eligibility requirements for the DTV coupons, it has language that strictly limits the feature set of the DTV tuner boxes. I believe there aren't any hidden features put in by manufacturers for fear of running afoul of the rules and being disqualified from being eligible for the coupons. Of course, risking disqualification from the program means significant revenue impact.
The broadcast flag only applies to OVER-THE-AIR ATSC broadcasts.
Cable systems are an entirely different story. Unlike the ATSC standards where the limit of DRM is the broadcast flag (which IS dead and buried), cable systems DO encrypt their signals and DO use DRM on 95%+ of their content, and most cable boxes force 5C encryption on their Firewire outputs and I'm guessing HDCP encryption on HDMI outputs (although most cable boxes currently available have component and not HDMI - this will probably change soon). About the only exception to the encryption on everything is that cable providers are legally forbidden from encrypting OTA broadcast feeds that they carry on their cable system. Cable (and satellite) DRM has ABSOLUTELY NOTHING to do with the ATSC broadcast flag.
retrorocket.o not found, launch anyway?
Digital broadcasts in the United States are much, much better than their analog equivalents.
Except where they're not. Which is a lot of places.
Personally, I don't see any compression artifacts at all on OTA digital broadcasts, HD or SD
You need a better television.
Magnavox tb100mw9. Quick run down, now has voided warranty, power supply contains painted traces, no good. analog tv side is surprisingly well labeled, agc, sub-chan, aud-in, aud-out, agnd, vmute, etc etc. rf is standard sealed unit, well labeled, all pins. digital board is disappointing, unknown chips, strange "firmware load cable", an assumption and really small traces, wizard soldering skill only need apply. Possible to attache 30g wire to every other pin, does have unmarked breakout's though. All and all the analog side is quite hackable, I think I'll add an s-vid and spdif jack to mine. One of our local channels was at least attempting to broadcast music on a sub-channel (is that the new term for it?). Hope this is helpful.
I think I just cashed out all my cool points.