MTD2 class 11

Digitizing Video

Helical Head recording Toshiba Firsts

tape1.gif (28797 bytes)

tape2.gif (18546 bytes) RGB Red Green Blue 8Bits each [3(RGB) *8(Bits) = 24 Bit color] or 2^24 = 16777216 colors Color Video uses YCC (YUV(PAL)/YIQ(NTSC)) to be compatable with Black and White Broadcast Y is luminance (same luminace used in B&W broadcast). Luminace determines the brightness of the pixel The Two C's (the c's are known as chrominance) determine the hue.

Analog Video Composite

One Clable. The luminance and color signals are merged onto one cable because of this mergin some information will be lost due to inferfernce. S-Video (beter)

Separated the luminace and color signal onto separate cables that are encased in one cable Component (best)

h of of the YCC are given their own cable Tape Format Video Format Quality Applications VHS Composite Good Home Video S-VHS, Hi-8 S-Video Better prosumer, industrial video BetaSP Component Best broadcast Chroma Subsampling http://en.wikipedia.org/wiki/Chroma_subsampling Becuas ethe human eye is less sensitive to color than luminance the chroma is often recorded with lower deffinition. 4:2:2 color http://en.wikipedia.org/wiki/4:2:2 4:1:1 color Digital Video(DV) DV25 DVCAM, DVPRO DV50, DV100

Digital Cameras

Cameras us a Charge Coupled Device (CCD) to convert light into electicty. How Digital Cameras Work A 3CCD camera splits the incoming light into three beam and uses three CCD's to capture each of the RGB values. A 1 CCD Camera can use a color filter array like the Bayer filter pattern to record the RGB color information. Bayer filters have twice as many green pixels

Video Test 3

   * Import storyborads into flash (make sure stage size is 720x480)
   * Trace all borads in flash
   * Export new frames to .bmp
   * Import new frames to Premiere
   * Render and new video test with the new borads
   * Post Version 3 video and new boards on you website 

Homework

   * Read Adobe DV Primer 2_6_02.aid
   * Video Test 2 

Links

   * A Quick Guide to Digital Video Resolution and Aspect Ratio Conversions
   * Adobe DV Primer 2_6_02.aid
   * How Stuff Works Camcorder