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1007 Question

1. What is XAVC

Video compression formats developed by Sony

  • Introduced in 2012
  • Feature: support HD up to 4K and beyond. Can handle 60fps and 10bit/12bit color depth
  • Use H264 as compression codec but optimize for professional use

H264: released in 2003, support up to 4K

H265: released in 2013, targeted to next generation of video, including 8K and HDR

2. What is Intra/Long GOP

Different ways frames are compressed

  • Intra: each frame is compressed individually without referencing other frames
    • Higher quality
    • Better for editing
    • Larger file size
  • Long GOP: a group of successive frame is compressed using both intra and inter frame tech
    • 3 kind frames
      • I frame: Intra frame, self-contained and not based on other frame
      • P frame: Predictive frame, hold only the changes from previous frame
      • B frame: Bidirectional frame: hold the difference between current frame and preceding and following frame, most compressed type
    • Smaller file size
    • Artifacts in high-motion scenes
    • More complex encoding process

B frame is X% previous frame and Y% next frame

I B B P B B P B B P …

  • 1 I-frame
  • 3 P-frames
  • 11 B-frames

3. What is S-Cinetone

Color Profile developed by Sony.

  • Designed to provide filmic look

Key attributes

  • Filmic tonal reproduction
  • High dynamic range
  • Instant usable footage
  • Dynamic enough for post-production

4. What is OTC and Rx

OTC: over the counter

  • Can be purchased without a prescription
  • Include pain relievers or acetaminophen for cold and flu

Rx: Prescription

  • Require a prescription from a licensed health care provider
  • Only be obtained from pharmacies

Why Rx

  • Eye of Horus
  • Latin ‘recipe’ means ‘take’