Fifty Years of Color Television 469
peter303 writes "The Houston Chronicle notes that color TVs were first manufactured on March 25, 1954 at a price of $1000 (about $4000 in today's dollars). Some of the older folk here remember the excitement of your first neighbors acquiring one of these in the 1960s and as the TV series one-by-one switched to color. Ironically, for such a high tech nation, there hasn't been a major quality improvement in TV broadcast images for a half-century until the 2006 changeover to HDTV."
Yes, but... (Score:4, Funny)
Re:Yes, but... (Score:4, Informative)
Re:Yes, but... (Score:5, Insightful)
"Fifty Years of Color Television!!" (Score:4, Funny)
Re:"Fifty Years of Color Television!!" (Score:4, Funny)
Re:"Fifty Years of Color Television!!" (Score:3, Funny)
Re:"Fifty Years of Color Television!!" (Score:3, Interesting)
Re:"Fifty Years of Color Television!!" (Score:3, Funny)
1669 hours... a perspective (Score:5, Interesting)
1669 hours... a perspective:
If you are awake 16 hours per day 1669 hours is 104 days, not "just" 70. Apparently, on average, adults watch TV 29% of their waking hours. If you work/commute 45 hours per week, your "free time" is, if you do nothing else, about 9 1/2 hours per day, of which, on average, you watch TV 4 1/2 hours.
So the average adult uses more than half of their available time watching TV.
Pretty sad.
Amy
Re:1669 hours... a perspective (Score:4, Informative)
Re:1669 hours... a perspective (Score:2)
Re:1669 hours... a perspective (Score:5, Insightful)
Re:1669 hours... a perspective (Score:2, Interesting)
Also, how do weekends get factored in? Is the TV on in the background while you're doing something else? What about special events? During football season, I'm glued all day on Sunday/Monday night, but otherwise, my TV watching is on
Re:1669 hours... a perspective (Score:5, Insightful)
So your problem is with people, and not tv, right?
Re:1669 hours... a perspective (Score:4, Insightful)
TV doesn't encourage you to think, it's just sitting there in front of you, a lot of it full of mind-numbing reality TV garbage. Now if PBS was winning the ratings war, I wouldn't be worried.
Re:1669 hours... a perspective (Score:5, Insightful)
The thing about the anti-TV elitists that I've noticed is that, unless you read the same list of books as they do, you are a "lesser" man. "Oh you haven't read ?" as they look down on you.
Not true. (Score:4, Interesting)
The Simpsons brought up all kinds of ideas, thoughts, ans stuff to think about. Many people may have chose not to take the opportunity to discuss some issues, but thats not TV's fault.
I challenge you to pick a TV show that there is no opportunity to think.
Re:1669 hours... a perspective (Score:2)
Re:1669 hours... a perspective (Score:3, Funny)
Re:1669 hours... a perspective (Score:2, Insightful)
Incidentally, the TV has a very positive feature that Slashdot, too, has. If you don't like what you see, you can just not see it anymore with one click of a button. Pretty neat, huh?
This Onion is for you (Score:5, Funny)
Re:1669 hours... a perspective (Score:4, Insightful)
Tv watching in my home has dropped by at least 90% cince we got the mythtv server and playback units running. My daughter watches her 2 shows within the timespan of one show and spends more time playing outside or with the dog, whatever.. Myself and the wife are spending more time together, the house is cleaner, we eat better as the evening entertainment is cooking, talking and other tasks.. we spend 1 hour to watch 3 TV shows we usually WANT to catch at the end of the night. skipping all the commercials and the boring parts makes it cool. the rare times we dont watch mythtv and watch live tv we all get annoyed as we cant skip commercials or pause.
you can have your TV and a real life too.
Re:1669 hours... a perspective (Score:3, Insightful)
Yes, this is meant as sarcastic humor. I own a TiVo, but was interested in putting together a MythTV. However, like many great ideas, the MythTV is poorly implemented from an assembly instruction. What I wanted was documentation saying "buy these components (and option
Re:1669 hours... a perspective (Score:3, Insightful)
My wife and I use it every day, but I haven't had to do ANY sort of admin work or changes since I got it up and running. It's really easy to use.
Also, ditto on the parent post. We watch many more programs now, but in A LOT less time. It's great.
Re:1669 hours... a perspective (Score:5, Insightful)
1) Anything about Americans
2) Anything about not owning a TV
3) Anything about being superior
That was not a troll comment, it was a sad commentary on just how much TV people watch. I think you might be a troll however...
--rhad
Re:1669 hours... a perspective (Score:3, Interesting)
Or, it was a happy comment on how much free time people have.
People who read a lot of novels probably spend at least as much time with their noses in books as I spend staring at the screen, but while they take days to get through Anne of Green Gables I can get the whole story from PBS in a single evening, and move on to another whole story before going to sleep!
This is purely anecdotal, but the people I know who like t
Re:1669 hours... a perspective (Score:2, Insightful)
improvements (Score:5, Interesting)
Re:improvements (Score:2)
What is a non-integer frame rate? Do you mean the Horizontal and Vertical Scans out of sync with each other? Or is one or the other a strange multiple of the carrier wave? Or what?
Re:improvements (Score:2)
Re:improvements (Score:2)
Re:improvements (Score:2)
Re:improvements (Score:4, Interesting)
IIRC, the original B&W broadcast was at 60 frames/second, but there was some technical reason they had to slightly shift it in order to add the color subcarrier. Old B&W TVs were the worst with this noise distortion because they weren't designed to try to prevent it.
(I think that color TVs only became truly usable in the 80s when they introduced decent automatic color correction. Before that, it seemed you could only watch in one of two colors: purple or green. No matter how much you fiddled with the knobs on old color TVs, it never looked quite right.)
Frame Rates, etc. (Score:5, Informative)
Actually, the problem is that the frame rate is not an exact integer multiple of the 60Hz AC power frequency, which is usually the largest source of electrical noise. It's off by a fraction of a percent; that's why you often see a distortion slowly creeping up the screen about once per minute as the frame rate beats against the power line sine wave. If the frame rate were exactly locked to the power line frequency, the distortion wouldn't move, so you wouldn't notice it.
Uhhh... Okay. Credentials: Former professional video technician (at the SkyDome in Toronto) before being hired to design radar video systems for Litton. Also an avid collector and restorer of early television sets. [glowingplate.com]
In the 1950s, AC power was not universal, especially in rural areas (note the sustained popularity of the "All American Five" AC/DC table radio at that time). Lots of places had DC, and lots of cities had 25Hz power well into the late 1950s. Nor was it necessarily going to be in sync from one town to the next, so you couldn't guarantee that the 60Hz powerline hum could be synchronized with the TV station's 60Hz vertical signal. In other words, you couldn't be guaranteed that the hum was going to happen in the vertical blanking interval (that black bar you see rolling when the vertical hold control is set wrong).
I suspect that the vertical was chosen to be at 60Hz more because the large current draw of the vertical output tube driving the deflection yoke would then be more likely to occur during the charge cycle of the set's filter capacitors, allowing smaller capacitors to be used (cheaper). This of course being a time when electrolytic filter capacitors (in fact, all small parts) were still hand made.
Even more importantly, you should remember that most early TV sets (until the advent of selenium rectifiers in about 1955) had full-wave rectifiers, generally using a 5U4 or similar tube. A full-wave rectifier folds the negative half of the sinewave up to the positive side, which effectively doubles the frequency to 120Hz.
Either way, if the set is operating correctly, regardless of color standard, you will not see any powerline artifacts or ripple. It's when the horizontal system starts to come out of resonance that the biggest current draw happens in the set. Your horizontal output tube (transistor) consumes the most power of any part of the set; if a typical 1950s DuMont or Admiral has a cathode current of 120mA (at ~300V) and you misadjust the horizontal hold, that current will spike to over double that. That will load down the set's power supply, discharge the filter capacitors more, and you might start to hear 120Hz (full wave rectifier at 60Hz) hum in the set's speaker.
IIRC, the original B&W broadcast was at 60 frames/second, but there was some technical reason they had to slightly shift it in order to add the color subcarrier.
Yup. The original NTSC standard was 30FPS; when the 3.58MHz sinewave which carries color was added, the bandwidth of the signal had to be increased. (The original was 3.5MHz bandwidth for the image; reducing the frame rate slightly was sufficient to keep the bandwidth inside the original spectrum and didn't screw up many of the existing TV sets.)
Old B&W TVs were the worst with this noise distortion because they weren't designed to try to prevent it.
Note that the NTSC color TV standard was adopted in 1953, though not implemented until 50 years ago today. Every TV set built since then has known about the new frame rate the sets would have to handle. I actively collect and restore early TV sets, and I only have a few which predate this - they're rate.
Again, you don't get powerline beat in the picture unless something is wrong with the set's filter capacitors.
If you're getting a beat in the picture which, on a blank raster, moves in time with the vertical hold control, then you've got a problem where the vertical is either consuming too much current, or a
Re:improvements (Score:5, Informative)
The frame rate in monochrome television was 30fps. In NTSC, it is 29.97fps. This leads to the need for "drop-frame" timecode, and other delights.
Drop-frame attempts to correct for the time errors by dropping two frame addresses periodically. The algorithm is that the first frame of the first second of each minute not evenly divisible by ten is identified as frame 2, not frame 0. The 18 frames per 10 minutes thus dropped reduces the cumulative error to a little more than 2 frames per 24 hours.
There are other techniques recommended for reducing the residual further.
Re:improvements (Score:2)
Re:improvements (Score:5, Informative)
Check out this [nmia.com] link to read more on it. Also this [epanorama.net] link has some interesting info.
Re:improvements (Score:3, Interesting)
Then you have probably not fully comprehended all the design features in the standard, nor allowed for the fact that all the design was accomplished in a time when calculators were mechanical monstrosities, and computer modeling simply didn't exist.
Though PAL has a slightly higher horizontal and vertical resolution, it also embodies mathematical relations that are anathema to digital processing. Moreover, with a frame rate of only 50Hz, it evidences signific
Re:improvements (Score:4, Funny)
Many people in the TV production biz say that NTSC stands for Never The Same Color
Re:improvements (Score:5, Informative)
I've worked in television for over 30 years, and although there are certainly shortcomings in the NTSC standard, they are dwarfed by the failings in the delivery systems (transmitters and cable systems), so that the resolution visible in the living room has typically been about 50% of that seen in production rooms.
Re:improvements (Score:4, Informative)
Yes, the advent of CCD cameras has eliminated the hassles of registration that were such a headache in tubed cameras, and the availability of digital filtering has also helped to reduce artifacts in the encoded NTSC.
Re:...non-integer frame rate? (Score:5, Informative)
Look here:
http://www.poynton.com/notes/video/Four-fi
"older folk"? (Score:4, Funny)
Cheeky buggers.
I remember when business desktop computers first went to color. First the IBM PC and then the Mac (technically I suppose the Apple ][ was a business machine). "Ah," I thought to myself, "this will never catch on..."
Re:"older folk"? (Score:2)
Sad thing about HDTV. (Score:5, Insightful)
Was HDTV really even necessary? Our tax dollars were spent mandating its deployment, our money will be wasted purchasing the receivers (which are going to have to be in all TVs), and what does it do for us? Nothing.
We worry about the effects of lack of exercise, overeating, diabetes, etc, yet we mandate better TV signals and are double paying for it.
Re:Sad thing about HDTV. (Score:5, Funny)
You have to work harder to pay the increased cable bill as channels have to pay to buy new equipment. Then you have to work harder still to afford the new TV to receive the signals. Then you have to get a car big enough to carry said new TV from the store to your house. Then you have to haul it around and get it in a place where your wife (or SO) approves so it follows the flow of the room. By this point, all the overtime/additional work and physical exercise has caused your heart to explode. You die, your spouse/SO gets your life insurance, your company gets to hire a younger replacement worker and pay 2/3 of what they paid you.
Lower unemployment, more money flowing in the economy, and all the fat unhealthy people are gone! All because the FCC wanted HDTV.
(just kidding....or am I?)
Re:Sad thing about HDTV. (Score:2, Interesting)
No, it really wasn't, and the right way to make the change would have been to allow the market to drive the conversion, rather than issue a fiat. Instead, there are innumerable new problems with license issues, and many LPTV broadcasters at risk of losing their allocations. And in the end, much of the programming, is, as ever, crap.
500 channels, and nothing on.
16:9, and still nothing on.
And by the way, it will be quite a while before anyone outside the top 15 or so market
necessary???? (Score:2)
It probubally wasn't necessary.
"Our tax dollars were spent mandating its deployment, our money will be wasted purchasing the receivers (which are going to have to be in all TVs), and what does it do for us? Nothing."
The TV industry had to do some new product so increase thier pocket books. Why not use lobbiests to get a law for a change and force people to change. THe average person wouldn't change if they weren't forced. It's just a way to have a garuntee see for a
Re:Sad thing about HDTV. (Score:3, Informative)
Example: If you get DBS Satelite (Dish Network, DirecTv) you are getting a digital signal. If you have digital cable you're getting a partialy digitial signal.
The reason this is happening is because the FCC wants to get the Analog bands back. My understanding of this (which may be flawed, you network gurus can feel free to chime in on this) is that
Re:Sad thing about HDTV. (Score:2)
Before, tv rips were boarderline because enlarging it to full screen would make it nicely pixalated.
Now, high quality, "why am I paying for cable" tv-rips are much easier.
A story... (Score:5, Interesting)
He remembers one time when it broke and the whole neighborhood pitched in to fix it...
Re:A story... (Score:4, Interesting)
Anyway, one day he brought home a box of parts and a picture tube from RCA and built their family a color television. My father remembers how every week neighbors would come over to watch the Wonderful World of Disney because it was one of the few color programs each week.
My childhood's claim to fame is a 386 Packard Bell and Prodigy.... sigh.
Another story on the power of TV... (Score:4, Funny)
Maybe six hours a night, we'd drag string around the living room, goof around with the fether duster, throw things back and forth, etc. The beast, very aloof even for a feline, got more attention in two weeks than she probably had in the previous six months.
Man, was she pissed when we got that TV back.
Sure there has been improvement (Score:2)
Yep... (Score:4, Insightful)
Wide-format, taking long enough! (Score:5, Interesting)
And of course the fact that PAL is higher resolution that NTSC, and we realize how little has changed in this past 50 years. Why exactly has it taken North America so long to change to a better format? I'd imagine the HDTV change will happen almost overnight, much like the DVD revolution, but it sure took a while for the quality of TV to step up a notch.
Now if they could only do something about what's actually ON the tube.... or, um.. the flat panel?
Re:Wide-format, taking long enough! (Score:2)
Re:Wide-format, taking long enough! (Score:5, Interesting)
My Phillips TV does a really good job of automatically stretching the screen when it detects widescreen.
Re:Wide-format, taking long enough! (Score:2)
I really doubt this - DVD players were relatively inexpensive, and there were plenty of DVDs available at a reasonable price.
The investment of HDTV is huge - a new TV, new receiver, new service, etc.
~Berj
Re:Wide-format, taking long enough! (Score:2, Funny)
2006? Now! (Score:2, Insightful)
Re:2006? Now! (Score:2)
I for one welcome our new "Kill Your Television" overlords.
Re:2006? Now! (Score:2)
Re:2006? Now! (Score:2)
What exactly does that mean? 85% of all homes own an HD set(fat chance)? 85% of all broadcasts are available in HD format (possible but unlikely)?
Thats because (Score:2)
Smell-o-vision?! (Score:3, Funny)
Forget HDTV, where is our Smell-o-vision? [retrofuture.com]
Re:Smell-o-vision?! (Score:3, Funny)
quality hasn't changed since ~1939. (Score:5, Interesting)
this was not the case in britain, where a new, but incompatible, standard was created, that used bandwidth more effectively, and had better color.
so hdtv is the first new standard since about 1939. it's about damn time.
this proves, once again, that standards are a double-edged sword. use and choose carefully...
Cable TV (Score:5, Insightful)
I never complained (Score:3, Interesting)
Make big bird yellow! (Score:3, Funny)
My mom recalls me, as a toddler, telling my dad to "make Big Bird yellow".
In more recent years, Tivo is my second most favorite enhancemenet to television.
And TV still sucks! (Score:4, Funny)
um.... television?? (Score:4, Funny)
Are you referring to my Gamecube monitor?
I suppose quality is subjective then (Score:3, Interesting)
Programming quality has greatly improved since even the 1980s, and so has the picture/colour too, in my opinion. The cameras are sharper, and don't produce as many streaks when they move in dim areas.
The quality of the TV electronics has declined if anything. Now that they are made in Mexico, instead of places where quality was a desirable feature, I hear lots of people complaining they die within a year. Plasma TVs for instace only have a lifespan at maximum of about 7 years, compared to I suppose ~15 for CRTs. I have two working 20" colour TVs that are both at least 15 years old.
I would rather watch a fuzzy show I like, than a sharp/crystal clear show of some tiresome comedy like Everybody Hate Raymond.
Improvements in TV broadcasting (Score:4, Insightful)
Has it been that long? (Score:2, Insightful)
The real improvements... (Score:5, Interesting)
Then there have been improvements in the means of broadcasting signals. Cable TV was introduced, and not too long after was followed by satellite reception (with their appropriate receivers), both of which improved the strength of the signal and integrity of the image. In more recent years, digital cable and satellite hit it big, and allow for near-perfect signal quality and picture integrity.
The only thing that hasn't really changed up to this point has been the resolution, and this has partly been a result of how well the TV market took off after its introduction. It's hard to change a standard once it has been in place and is used by everyone. Optimally, it would be nice if there was a way to allow HDTV signals to continue to be received by regular definition TVs so that broadcasters wouldn't have to maintain separate equipment, but the technology is so much different that it would be impractical. This is why the introduction of HDTV has taken so long.
Re:The real improvements... (Score:4, Interesting)
Modern TVs use a colour gamut designed to improved flesh tones, yet they have a smaller gamut than the original colour specification. In other words, an antique original colour TV is able to represent MORE colours than your current set.. It just won't do hiqh quality pr0n as well.
As to "near-perfect" signal quality and picture integrity... I would argue that "digital" mpeg encoding reduces quality. The mpeg encode of course relies on "picture integrity" (actually, no, everything is bundled up into 188 byte packets, with the assumption that there will be lossage, and no retransmission).
As to resolution - 480i has been "good enough". Indeed, DVDs are 480i/p as well. Generally, few complaints.
1080i (etc.) HD formats. ARE a major step. Roughly, an order of magnitude improvement. But, for many, 480i/p is "good enough" (please note that HD has 6 times the datarate of a current DVD - and DVD *is not* an HDTV format. The only source of HD will be broadcast (possibly cable or sat..). And, you won't actually be able to *record* an HD signal using normal consumer gear).
And, I find that 480i/p is good enough for me. I do have a largish set, and still don't really have the urge for HDTV. If we had "super-DVD" out there, with 1080i format movies, THEN I would for it. But, I honestly don't care for broadcast formats.
That's probably just me, though...
Ratboy.
Quality improvements (Score:2, Informative)
magnets (Score:2, Interesting)
Resolution concerns? (Score:2, Insightful)
Inflation (Score:2)
Ouch. There's an argument against keeping your retirement savings in bills stuffed in a mattress.
Since the birth of the US, the dollar has depreciated by 95% of its value (that's 2000% inflation). A dollar used to be defined as 1/20th of an ounce of gold, and now it's around $400/oz.
Inflation (Score:3, Interesting)
Actually there were two other revolutions (Score:4, Insightful)
Assuming HDTV actually switches over in 2006...
I would argue that there were two major quality improvements in TV with the advents of video tape and digital compression. The first was a revolution of time, since people could now watch what they wanted when they wanted regardless of when the stations/theaters were showing it. The second enabled a revolution in distribution, as it allows cleaner transmission in smaller channels and arbitrary additional content. This is mainly manifested in DVD but is equally applicable to digital cable, video on demand, and online distribution (legal or otherwise, with anime fansubs and other non-domestic shows being the most striking application). Thanks to digital tech you can bundle on a ton of extras, edit with ease, and lower the cost of distribution and replication to inconsequential levels.
HDTV is a nice improvement in video quality to theater-grade levels. But the video and digital revolutions are far more significant, and will continue to trump HD where both can not be accomodated. After all, what matters the most is not the presentation but content.
Changeover to Digital (Score:2)
IIRC the changeover is merely to over-the-air broadcasts, and would be of DTV [keohi.com] and not necessarily HDTV. In other words, providers could digitally broadcast standard-definition (480i) signals if they chose to do so, which would be better than analog 480i, but it's definitely not high definition (720p, 1080i/p). They would do this so they can broadcast more standard definition signals [pbs.org] on the same allocation of bandwidth that they would otherwise use up with one
Color TV in 1928 (Score:4, Interesting)
BTW, they even did 3D TV around the same period.
Needless to say few people ever purchased Baird televisors, the picture quality was even worse than NTSC.
wow (Score:3, Interesting)
$1000 then / $4000 now for the first round of color TVs?
It was something like $10000-20000 for the first round of HDTVs. In the last year they were just now coming down to the $4000 range, especially if you count the cost of the HDTV tuner as part of the TV cost.
Today you can get them for sub-$1000 but not with a tuner so far, which puts it at a minimum of $1200 for full HDTV.
How long did it take before the broadcast networks considered color to be "it"? I know in the early 80's I was still watching on a B&W tv about 1/2 the time. -Good- color quality didn't really happen until the late 80's.
That is 30 years for a full transition.
Makes the time it has taken to get HDTV adopted (2 years before it is considered defacto, probably 10 more before you get rid of the majority of old color boxes that are using downscan converters) to be alot less painful than people usually make it sound.
HDTV won't just affect couch potatos (Score:3, Insightful)
Consumer and pro-sumer cameras are going to get a whole lot better in terms of color sampling and resolution. The ability for the start-up movie maker or videographer to turn in a superior product will prove to be much better with this technology, also.
I don't know how much different the standard is for HDTV between different countries, but I'm sure if pros and the like don't have to choose between NTSC, PAL, and SECAM, there will also be quite a few happy people out there.
high-tech nation? (Score:2)
Not Ironic (Score:2)
We have a huge installed base of TVs. Practically everyone has one or three. This is an immense amount of inertia to overcome, and it isn't conducive to rapid or frequent changes in basic technology.
An older folk (Score:3, Interesting)
Meanwhile, another friend of mine's dad was working with Ernest Lawrence at Berkeley to develop the Trinitron tube. Sony ended up with the manufacturing rights because not one of the 5 U.S. television companies was interested and the Europeans couldn't manage the manufacturing difficulties.
"In Living Color" (Score:4, Interesting)
Anyway, like all new technology, first they trumpt the technology itself. I remember NBC shows beginning with the colorful peacock logo and the voiceover saying, "The following program is brought to you in living color," a sentiment that today makes you think, "Duh!" but back then meant something new about the tech. That's the typical arc for technology. First they talk about the tech, and then the tech just melts into the background and nobody thinks about how it happens, they just enjoy that it happens.
Re:"In Living Color" (Score:3, Insightful)
Quality was LOUSY until the 1970s... (Score:5, Informative)
In practice, the home receivers of the late 1950s and 1960s were lousy. They were very temperamental beasts. They had no built-in degaussers and if you moved them or turned them you'd get color changes due to the earth's magnetic field.
The tube circuits were unstable and drifted. They had no ability to compensate for any signal variation, so colors shifted from program to commercial, from program to station break, from program to program, and sometimes from camera to camera within a program. You were constantly leaping up to fiddle with the contrast, brightness, saturation, and hue adjustments.
The tubes were never properly converged (and had about seventeen tweaks needed to converge them).
The picture tubes were circular rather than rectangular and cut off significant parts of the picture. The phosphors couldn't deliver much brightness, so they couldn't put the usual neutral tint in the CRT face; a set when turned off looked pale grey rather than dark. When turned on, room light washed out the colors (and if you turned the brightness up the picture looked even worse).
They were trophies and icons of conspicuous consumption, but it wasn't much fun watching them. I've often suspect that at least part of the reason for the popularity of the Disney show is that animated cartoons were relatively unharmed by slight color distortions.
In the 1970s, solid-state circuits and the introduction of various AGC and other automatic-adjustment features finally brought home receivers to the point where they were worth watching.
Color TV and YIQ (Score:3, Interesting)
What's your definition of irony? (Score:3, Insightful)
When I was a kid, we got two and a half channels with crummy reception. A few years later, we got a 15 foot dish and watched much better signals before the channels started encrypting....but they STILL had issues with sparklies when sunspots were active....18-32 analog channels on 10-15 satellites, requiring a dish to rotate to get to them. Then we went to an 18" dish that gets 150+ channels on two satellites that don't require repositioning, and all look uniformly good (some compression artifacting) especially when compared to two and a half channels in the late 1970s.
No improvements? What about Vert. hold! (Score:4, Informative)
No improvements??!! Don't you remember "vert. hold" and having to adjust that up until sometime in the 80's. IC-based PLL circuitry has really improved TV since the transistor and tube days.
Re:Charlie Brown always strikes nostalgia for me (Score:3, Interesting)
Re:YUV color (Score:4, Interesting)
There are infinitely-many sets of primary colours you could use to represent RGB colour. In an RGB colour space any set of three linearly-independent vectors will do for the primary colours. The YUV model was designed for compatibility (Y = black and white) and realism, since the U and V primaries are closely related to important colours like human skin tones. Can't have people looking like Vulcans, now can we? :-)
We never had a colour TV when I was growing up. Always black and white. When we moved out to the country colour was irrelevant anyway (snowy pictures look much worse in colour), until we got a satellite system.
Historical tidbit: the Apollo video from the Moon used a frame-sequential colour system, which was converted once it got back to Earth.
Technical tidbit: some ham radio folks use a system called Slow Scan TV ( SSTV [arrl.org]), which transmits still images over the radio. They usually use a line-sequential colour system, which gives the signals a distinctive waltz-like sound. Your best bet for such signals is around 14230 kHz. People used to use all kinds of weird and wonderful dedicated hardware, but now a computer with a sound card is the usual setup.
...laura
Why, yes he was mexican (Score:3, Informative)
http://www.lomcximo.com/english/people/camarena / co ntent.html
WITHOUT MONEY
He claimed not to have a penny from his inventions, as he had invested all of his money in new research.
Can the inventor of the first color television be Latin American?
In 1940 at the age of 22, Guillermo Gonzalez Camarena obtained US Patent
No. 2,296,022, which protected his "Trichromatic" system used for color television transmissions.
Gonzalez Camarena was