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You were burning data CDs in '84? That is impressive. How did you read it? I mean, I think the first general availability for data CD readers was in the NeXT co

You were burning data CDs in '84? That is impressive. How did you read it? I mean, I think the first general availability for data CD readers was in the NeXT computers in the '89 or so?

basilgohar 5y ago
I don't think anyone was burning CDs in 1984, unless you mean literally burning pits and lands into the master CD to make the inverted submasters (jargon here is probably wrong) that then go on to press/mass produce the actual CDs that ended up on shelves.
thought_alarm 5y ago
This technology was developed in the 1970s. So, if you want to record 60 minutes of CD-quality digital audio you need about 600 MB of raw data storage. In the 1970s this was an impossible amount of data. 600 MB of hard drive space would cost as much as a house. Without a way to easily store that huge amount of data, the CD could not be developed. And in the 1970s the computer industry had no answer to that problem. The solution was ingenious. They take a stream of digital bits, convert it in to standard broadcast video, and record it with a plain old VCR. Broadcast video refreshes at 60 FPS, 245 scan lines per frame. If you draw 96 black-and-white pixels per scan line, that works out to three 16-bit stereo samples per scan line. 3 samples X 245 lines/frame X 60 frames/second = 44100 samples/second. Hence, the CD audio standard that we still use today. So, to answer your question, they weren't burning CDs in '84. They encoding 600 MB of data on to plain old VHS tapes, and sending those off to be mastered.
- TedDoesntTalk 5y ago
  Broadcast video was 60 fps in the 70s and 80s? I thought NTSC was 29.97 fps.
redis_mlc 5y ago
We had a hookup at Sony Japan. Likely Sony was using our mag tape to actually master a custom CD with pits, like a store-bought music CD. Yes, it was pretty much science fiction at the time. You can find photos online of the original CD writers, which took about 4 feet of rackspace (several 19" enclosures.)

You were burning data CDs in '84? That is impressive. How did you read it? I mean, I think the first general availability for data CD readers was in the NeXT computers in the '89 or so?

basilgohar 5y ago

I don't think anyone was burning CDs in 1984, unless you mean literally burning pits and lands into the master CD to make the inverted submasters (jargon here is probably wrong) that then go on to press/mass produce the actual CDs that ended up on shelves.

thought_alarm 5y ago

This technology was developed in the 1970s. So, if you want to record 60 minutes of CD-quality digital audio you need about 600 MB of raw data storage. In the 1970s this was an impossible amount of data. 600 MB of hard drive space would cost as much as a house. Without a way to easily store that huge amount of data, the CD could not be developed. And in the 1970s the computer industry had no answer to that problem. The solution was ingenious. They take a stream of digital bits, convert it in to standard broadcast video, and record it with a plain old VCR. Broadcast video refreshes at 60 FPS, 245 scan lines per frame. If you draw 96 black-and-white pixels per scan line, that works out to three 16-bit stereo samples per scan line. 3 samples X 245 lines/frame X 60 frames/second = 44100 samples/second. Hence, the CD audio standard that we still use today. So, to answer your question, they weren't burning CDs in '84. They encoding 600 MB of data on to plain old VHS tapes, and sending those off to be mastered.

TedDoesntTalk 5y ago
Broadcast video was 60 fps in the 70s and 80s? I thought NTSC was 29.97 fps.

redis_mlc 5y ago

We had a hookup at Sony Japan. Likely Sony was using our mag tape to actually master a custom CD with pits, like a store-bought music CD. Yes, it was pretty much science fiction at the time. You can find photos online of the original CD writers, which took about 4 feet of rackspace (several 19" enclosures.)