Ampex D-2 VPR-300 demo tape
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- Опубліковано 8 бер 2009
- Ampex demo of their "new" D-2 format VTR, the VPR-300. Interviews with industry leaders who have adopted this format talk about its strengths. D-2 was a great leap forward in video quality. Much better pictures than 1" Type "C", which was the current leading broadcast format at the time. It offered "read before write" or "pre-read" where you could insert over material already recorded on tape. It offered simultaneous playback and recording on the same VTR. D-2 was introduced in 1988. D-2 used 19 mm (¾ inch) metal particle tape. Need a dub from D-2 or D-3? Contact me.
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Yes. Recently, I played a 15 year old tape and it played fine. Remember that format has a lot of correction. Besides using data shuffling and redundancy, there are extra bits for correction. You can even disconnect one video head (out of four) and the video still plays fine,
Great to see that. I worked with D2 in 1990 and it's fun to see again those machines
Gawd, willya look at all that ADO!
We used these at ABC a lot well into 2008. We also used D1's for the graphics department.
The D2 was also handy for allowing you to slightly speed up a program recorded to it on live playback and using the minute or two gained for an extra break.
@Celiecinema1 D-2 did not compress the video signal. Today, we have all sorts of compression but it is still just data and it depends on how much data you have that will determine where you can record it.
I gave seeds to UK. Brothers back in back in 87 I think. I hope they remember me in class redwood City class
Yes, it is exactly the same. D2 is NTSC digitized. The advantage is perfect duplicates. With a D2 switcher, you could go unlimited generations. Even with an analog switcher, 10-15 generations was acceptable. It was the best way to record composite.
I used to GVG200 and a Paltex digital mixer. I would usually feed ME 2 of the GVG into the main in and ME1 into the key in. I could do as many pre-read layers as I wanted, backing up from time to time to my other D2
in 1988, Ampex created the composite Digital Video Tape format called D-2 and eliminates the limitations of analog video recording but it suffered Composite video artifacts like rainbow-effects and dot-crawls. Sony D1 video tape does not have any of them because it's a component Digital Video format.
But D1 costed an arm and a leg
@@Ballowax you’re correct. D-2 was cheaper than D-1.
@@ryan8211982 D1 stored digital Y-CB-BR component video as it's standard with a horizontal resolution of 720pixels by 480pixels via interlacing. It was huge technological feet in video and some laserdisc titles were sourced from D1 video cassettes.
@@Ballowax since Warner Home Video used the Digital Processed for their VHS releases back then.
@@ryan8211982 yeah since D1 and D2 stored digital video at NTSC resolution.
D2 was an uncompressed format that digitized the composite waveform. The video sampling rate was 14.3 MHz at 8 bits. The data rate was 131.7 MB/sec.
Yes. As the price of component digital came down, DigiBeta replaced the composite digital machines as well as 1". D2 was popular in the beginning because it was a fraction of the cost of component digital, especially items like switchers. D2 was less than half the cost of D1.
Yes, you are exactly right. Too bad that poor management and strong competition did them in. Remember that the president of Ampex was hired by Sony after he had been there for 25 years. I'm sure that helped Sony.
This happened after the leveraged buyout of 1987. The loss of management skills, knowledge, and abilities at Ampex after the buyout destroyed a great company. Those same executives from Ampex went on to lead other companies to great success.
Since DVCAM has a luminance bandwidth of 5.75 MHz and has much less noise and is so much smaller plus is component, I'd take the DVCAM today. But the D2 wasn't compressed and you could go hundred's of generations. 50-60 was the most I ever used it for.
@Celiecinema1 Yes, 13.5 MHz at 8 bits is common for the ADC using Y, R-Y, B-Y components for D-1. The composite video signal is one volt peak to peak. D-2 sampled from 140 to -40 IRE so it spread out the eight bits quite a bit. Some though too much.
VTA, the first post house featured in the video, had some of the first (if not the very first) Ampex D2 VTR's assembled and there were definitely a lot of bugs early on. Our Vice-President at the time, tasked myself and another online editor to do multi-generational demonstration tests in both analog and digital using 1" and D2. The surprising result was how good the 1" looked after 15x generations compared to the D2. The digital videotape had the expectation of still looking good after that many layers but our Ampex VPR-3 Type C one-inch machines (VTA was almost an Ampex-only facility in the late 1980's) held up very well. The trick to doing multi-generational recordings in analogue NTSC was to reduce the chroma gain to about half on each pass. Then, on the final composite, boost the chroma level (saturation in TV set parlance) back to the full target amount and the results were better than trying to maintain full chroma gain throughout every pass. VTA's founder, Ken Chambliss, has the first sound bite in this video. His celebration of life was almost exactly one year ago now.
You bring memory back . thanks. I was Ampex 86. 89 of I remember correct. Sony was D-1. No lol no K factor
I did D2 I was redwood City before earth quake of I remember 89
Tsuburaya used the D-2 video tape format for the non-ultra series, Denko Chojin Gridman in 1993.
I always use a time base corrector. That way the video is always clocked out at the correct frequency. The number of samples always stays the same.
Here is a similar video that played at the sony booth about 1988.
D-3 did the same as D-2 but it was made by NHK. It became obsolete according to BBC in England.
Were promo tapes like this ever made for the VPR 1 inch machines?
I get it that UA-cam did not have 60p back in 2009, but why does it look stretched? Did you forget to specify non-square pixel aspect ratio?
What was the cost of these decks back when they came out? I remember BetacamSP decks were 40-75k depending on features in the late 80's, at leas that's what I was told as a young guy who had no buying power.
My D-2 decks were in the $80k range. Beta SP were less than $40k
Has anyone ever played back a 19 year old D2 tape with no issues? Does the platform have good error correction?
I have 5 Disney D-2 Sony tapes. I might make a video on it. Lol
It always annoys me that the tech for dvd-quality digital video stored on tapes was around since at least the mid 80s, possibly even the late 70s /early 80s, but never got adopted. Everything stayed crappy analog VHS until DVDs dropped in the late 90s. Think of all the videos of breaking news stories, music concerts, and other things from the 80s and 90s that we're stuck with in crap VHS quality, when it might have been otherwise. Hell, even laserdisc was better than VHS, it was still analog but its huge bandwidth gave it quality rivalling DV, and by the mid 80s they had developed a recordable variant. But once again it never caught on.
How sad.
Bloodgod40 vhs was cheap.
Personally I wonder why SVHS never caught on.
Do you have the link?
How many tv shows and movies of the 90s mastered on the D-2 video tape and how many are delivered to clients like networks such as CBS, ABC, NBC, Fox, then-UPN and the WB and cable networks like Comedy Central, Nickelodeon, MTV, the USA network and others?
I don't know. HBO did use the Ampex D-2 as a delivery format for some time. CBS also used the format as playback.
The Rubber Memory Comedy Central used the D-2 for the mature-oriented animated comedy series, South Park.
I had 2 Sony D2 Machines - Ping Pong...
Has other tv shows in the 90s mastered on D-2 video tape?
I was on the tech staff on the first Big Brother. We edited to D-2. CBS had several shows that used D-2.
Too bad. I know of collectors that would like old video equipment. They restore and preserve the old gear. Please let me know before you throw away anything else.
I know how heavy those are. It takes at least four men to pick one up.
Has D-2 video format suffer issues like rainbow effects and dot-crawls because of a composite video signal?
Yes. All composite formats will be the same.
The Rubber Memory but long ago, you said a good comb filter used to eliminate dot-crawls and rainbow effects in the D-2.
Ampex has some poor management but remember this company invented the first video recorder in 1956. A lot of history but had a hard time competing with the Asian manufacturers in the late 90s.
I think ampex used this format in the acr 225. Someone who used both the acr 25 and the 225 despised the 225. The decks would fail. We used the acr 25 until 1998, skipping the library management systems for a 40 hour video server.
Yes, the 225 had four VPR-300s. Interchange was a problem. Not a successful product.
How much to transfer 1 hour of D2 tape?
1 hour = $150.00
PRE READ......
We did lunch together . I said they were German
My bad. Bad. They were Dutch. But they loved my honestly. We all go to lunch 5 days they were here. CA redwood City. They loved my honesty. They were 5 engineers. Van any of them say hello back since 87. I hope future again. 2020. I shared the times England ampex eng. Us times. I shared my time. Our USA foods. I bought then many seed packs to bring back home to EU. Peppers ects
@7:02
HBO made aerobics videos? LOL. Lemme guess, "Game of Thongs"?
Sampling is 4x subcarrier.
I wonder how much better/more successful this format would have been if it was a digital component system instead of composite?
That would be Sony Digital Betacam
The Rubber Memory cool. I guess that would certainly qualify as a successful format!
We just threw away a boat load of these
Sucks I woulda taken all of them off your hands and would have put them to good use at my soon to be museum of old VTRs in Toronto Canada.
D-2 video tape format suffered from issues such as Dot-crawls and rainbow effects at the time.
A good comb filter decoder will eliminate those composite artifacts. Not the fault of the D-2 format.
The Rubber Memory the D-1 videotape format doesn’t have any composite artifacts because it’s a component digital videotape format.
@@ryan8211982 And so does the Digital Betacam format and also D-5. All component digital.
The Rubber Memory you’re correct.
Could have been but I don't remember seeing any.
I miss prereading.....
I don't :D
@@ManChicken one shot, preview preview preview.. commit
@@7landentertainment281 I agree. Preread was dangerous if there was a mistake; you were actually writing back to your source master. So you had better make sure on the first preread edit. I think preread was over rated. Didn't see many people using it on a regular basis.
As a novelty, yea...but as a real benefit...not really.
When you're a small shop and only had a limited amount of decks, it was more than a novelty... It was a necessity.
An analog VTR like VHS cannot record a digital signal. Besides, the D-2 bandwidth of 6 MHz is far greater than VHS at 2 MHz. No matter where you try to put the tracks, you don't have anywhere close to the bandwidth requited.
It so amazes me that most of this equipment is totally worthless today, and that control room alone must have cost 2 mill. The bank of machines must me 500k. Is there any use for any of this today?
But, on the other hand, audio recorders are going the other direction. Most people dont understand that I only SOURCE the audio on tape, the rest is edited digitally.
sharing the D-2 and 1" type c formats with Sony didn't help them and Allied Signal selling Ampex to Ed Bramson and friends started the demise of Ampex. Now they sell solid state records used by boeing and the goverment. their last digital vtr was the DCT series.. a pitty sony took years to do it but finally put them out of the business they started
And now you can do it all in 4K on a laptop 😂
iPhone
I find this, what is apparently an Ampex propaganda video, claiming that Ampex D-2 has up to 25 generations of loss less layering...and on Sony D-2 machines, generation loss is apparent within 5 or 6 generations. Isn't D-2 format is a standard and no matter who makes the machines, the technology and machines have to conform to that standard? So the performance of the machines from various manufacturers would be quiet close? I can understand if the generation loss differences are within a factor of 2 or 3 but a difference of 25 to 5 or 6 is quiet a difference and quiet unbelievable.
Ha. But how many ones and zeros? And at what rate? The bandwidth of a D-2 far exceeds an analog VTR, even a broadcast one. VHS was the worst NTSC consumer format ever invented. It has just enough bandwidth for two channels of digital audio. No digital video.
The data rate for D-2 is 143 Mpbs. D-1 is 270 Mbps.HDCAM SR is 440 Mbps.
Too bad this hadn't been deinterlaced and upconverted!..
I think I remember the program was on 3/4". I don't thing deinterlaceing and upconverting would help much.
@@therubbermemory2652 Do you at least have it in 1080i?
@@hansemist No. There is no advantage in upconverson.