ccroo
Well-known member
Dear Folks:
Okay, the camera head and the CCD chips are analogue devices. A DSP (digital signal processor) takes the analogue signal and turns it into ones and zeroes. Somewhere around here digital compression takes place using the "DV Codec" which makes the digital data stream compact enough to be laid off to tape in real time.
The camera can play back the digital tape, ie decompress the digital information using the DV codec and converting it back to an analogue signal that can be played on an NTSC televsion.
Then comes the computer. I work in FCP so Quicktime becomes part of my world. We use firewire and Final Cut to transfer the compressed digital information to our computer. The computer allows us to play the footage back on our computer screen. The material we transfer is now in Quicktime format.
Questions:
1) Is there a single DV codec? I've heard speak of an "Apple DV codec." Are there many?
2) Does the DV codec reside on a chip in a DV camera?
3) Is Quicktime a DV codec? Is Quicktime decompressing our clips when we watch them in Final Cut Pro? Or is it serving some other function?
4) I think I have a sense of how images are scanned onto a picture tube to create an image on a broadcast monitor. What's going on on our computer screens? Are we seeing distinct frames in succession?
5) Is the image we see on the computer as good, accurate, clear as what we see on an NTSC monitor?
Any help would be great!
Thanks
Raoul
Okay, the camera head and the CCD chips are analogue devices. A DSP (digital signal processor) takes the analogue signal and turns it into ones and zeroes. Somewhere around here digital compression takes place using the "DV Codec" which makes the digital data stream compact enough to be laid off to tape in real time.
The camera can play back the digital tape, ie decompress the digital information using the DV codec and converting it back to an analogue signal that can be played on an NTSC televsion.
Then comes the computer. I work in FCP so Quicktime becomes part of my world. We use firewire and Final Cut to transfer the compressed digital information to our computer. The computer allows us to play the footage back on our computer screen. The material we transfer is now in Quicktime format.
Questions:
1) Is there a single DV codec? I've heard speak of an "Apple DV codec." Are there many?
2) Does the DV codec reside on a chip in a DV camera?
3) Is Quicktime a DV codec? Is Quicktime decompressing our clips when we watch them in Final Cut Pro? Or is it serving some other function?
4) I think I have a sense of how images are scanned onto a picture tube to create an image on a broadcast monitor. What's going on on our computer screens? Are we seeing distinct frames in succession?
5) Is the image we see on the computer as good, accurate, clear as what we see on an NTSC monitor?
Any help would be great!
Thanks
Raoul
