An Introduction to CD Video (Philips, 1988)
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- Опубликовано: 5 сен 2024
- From a 12", CAV demonstration disc for the Philips CD Video format from 1988. There were a number of sampler discs for the format, of which this appears to be the earliest.
CD Video was a strange beast, because it was really just an extension of the Laserdisc/Laservision format, tweaked to modulate the video information pits in such a way that those modulations could be invisible to the video circuitry yet be used by separate circuitry to decode CD-format digital audio. This was distinct to pure Laserdisc/Laservision discs at the time which used FM-modulated analogue soundtracks.
The CD Video launch was largely a failure due to unreliable early players, high cost of the players and the discs, and the fact that digital codecs were just around the corner - within 18 months the MPEG1 codec was ready and implemented into a new, all-digital, Video CD format.
However the CD Video audio specification became standard for Laserdiscs from then on, the Laserdisc name was restored but with the additional mark, "Digital Audio", Philips pulled out of the Laserdisc market but Pioneer picked up the baton and produced a highly-regarded range of players throughout the 1990s, even finishing with a short-lived combined Laserdisc/DVD player.
This video actually toughht me something. I was always confused as to how both audio and video could be on a laserdisc, and how it could tell the difference between the two, and it explained it in a basic way that makes it a lot easier to understand, even to someone who knows a lot about technology.
With the naming cd video for laserdisc content, they made to confusion about disco vision, laser vision and laser disc even worse.
But great presentation, thanks for sharing.
Oh the days before digital video codecs. Just 5 years later came the completely digital Compact Disc Digital Video, and 4 years after that, DVD.
Actually, your timeline is a bit off.
In terms of optical discs, Laserdisc (then sold under the name Disco-Vision - not kidding), an analogue format based on composite video and FM audio, was launched on December 11, 1978. It was later, in 1980, when Pioneer purchased the majority stake in the format, renamed LaserVision (format name) and LaserDisc (brand name).
In 1982, the digital audio-only format Compact Disc (CD) came to be, developed by Sony and Philips. It applied may of the same principles as LaserDisc. The digital PCM audio format used for CD later was later incorporated into the LaserDisc format.
In PAL territory, where the LaserDisc format was struggling, a new stab at relaunching the format was attempted. This time Philips tried to relaunch the format circa 1986 by renaming the format CD Video (not to be confused with the later fully digital MPEG1-coded VideoCD). The strategy was to sell CD-sized discs, containing 4 audio tracks and a single music video , hoping to lure in new young users, while also selling 12" discs containing music videos and/or concerts. Other than the addition of digital audio and the discs being gold colored, it was still the same LaserDisc format.
The relaunch failed.
However, as the 90s arrived and film enthusiasts were discovering the format, that offered both picture and audio quality near broadcast quality and a load of extra material and prices were getting somewhat affordable, the Laserdisc format was starting to QUITE slowly seep into the mainstream.
Philips DID try to lauch a digital format known as VideoCD around 1991-1992 to rival both VHS and LaserDisc, but with quality being somewhat on par with VHS and you still had to change disc halfway through the movie, consumers didn't go for it, despite a rather large marketing campaign. It quickly faded into obscurity.
Fast forward to 1996. DVD had been introduced the world in Japan that year. Thanks to the newly developed MPEG2 codec and improvements to the laser, now able to read even smaller pits on the disc and even able to work in layers, it was now possible to contain a full movie as well as bonus material on one side... and even offer several languages in both spoken and written form.
Just some 4 to 5 years later, the format was so popular, that LaserDisc sales meanwhile had dropped rapidly. The final movie on LaserDisc came out in 2001
DVD got the success, that LaserDisc/CD Video/VideoCD never got. And is has managed to stay with us up until present time.
_"CD Video was a strange beast, because it was really just an extension of the Laserdisc/Laservision format, tweaked to modulate the video information pits in such a way that those modulations could be invisible to the video circuitry yet be used by separate circuitry to decode CD-format digital audio. This was distinct to pure Laserdisc/Laservision discs at the time which used FM-modulated analogue soundtracks."_
Well, yes and no.
Digital audio on LaserVision videodiscs had been around since 1984/1985, so just because it's LaserVision doesn't mean it won't have digital audio. And with regard to NTSC discs, there was sufficient bandwidth for a disc to have both digital and analogue soundtracks whereas PAL discs could only have one or the other for sound.
A DVD ripper software (for Windows) is required to rip CD Video titles to the hard drive
@@CartoonPhreak That would be for VCD, not CDV.
There is a difference between the two.
@@Watcher3223
There is one DVD ripper software available for Windows that contains the CD Video logo
@@CartoonPhreak But it can't rip CD-Video, at least not the video part of it.
The video part of a CDV disc is analogue, so a computer has no way to directly read that part of the disc. The only thing you can rip using a computer are the digital audio tracks that are normally accessible by a regular CD player.
There are VCDs, and those have MPEG1 video, which is digital.
@@Watcher3223
What the freak?
I had a CDV compatible player, but there was very little CDV single software released in Japan, so I only had two titles that I liked. de gozaru!! CDVプレイヤーは持っていても日本でCDVシングルタイトルは少なくて、お気に入りの２枚しかもってなかったでござる
Hmm... could there also be a 50fps version of this?
😂