VC-1 Tables

(Part of Understanding VC-1)

Scaling Modes

• 0: 1x1 = no scaling
• 1: 2x1 = horizontal scaling
• 2: 1x2 = vertical scaling
• 3: 2x2 = horizontal and vertical scaling

Motion Vector Ranges

• Range #0:
  • x component range = -64..63
  • y component range = -32..31
• Range #1:
  • x component range = -128..127
  • y component range = -64..63
• Range #2:
  • x component range = -512..511
  • y component range = -128..127
• Range #3:
  • x component range = -1024..1023
  • y component range = -256..255

Motion Vector Range VLC Table

code length   VLC    range #
    1          0        0
    2          2        1
    3          6        2
    3          7        3