Video Compression Picture Types - Predicted Frames/slices (P-frames/slices)

Predicted Frames/slices (P-frames/slices)

  • Require the prior decoding of some other picture(s) in order to be decoded.
  • May contain both image data and motion vector displacements and combinations of the two.
  • Can reference previous pictures in decoding order.
  • Older standard designs (such as MPEG-2) use only one previously decoded picture as a reference during decoding, and require that picture to also precede the P picture in display order.
  • In H.264, can use multiple previously decoded pictures as references during decoding, and can have any arbitrary display-order relationship relative to the picture(s) used for its prediction.
  • Typically require fewer bits for encoding than I pictures do.

Read more about this topic:  Video Compression Picture Types

Famous quotes containing the words predicted, frames and/or slices:

    When General Motors has to go to the bathroom ten times a day, the whole country’s ready to let go. You heard of that market crash in ‘29? I predicted that.... I was nursing a director of General Motors. Kidney ailment, they said; nerves, I said. Then I asked myself, “What’s General Motors got to be nervous about?” “Overproduction,” I says. “Collapse.”
    John Michael Hayes (b. 1919)

    For laughter frames the lips of death—
    Death frames the Singer and the Song.
    Allen Tate (1899–1979)

    I don’t sleep. I hate those little slices of death.
    Walter Reisch (1903–1963)