Method and apparatus for vertical compression and decompression of progressive video data

摘要

A method and apparatus are disclosed for polyphase filtering a first number of vertical lines of video data to generate a second number of vertical lines of video data and then polyphase filtering the second number of vertical lines of video data to re-create the first number of vertical lines of video data. The first number of vertical lines is larger than the second number of vertical lines. The polyphase filtering of the first number of vertical lines includes low-pass filtering and sample rate converting (down-converting) the first number of vertical lines to the second number of vertical lines. The polyphase filtering of the second number of vertical lines includes sample rate converting (up-sampling) the second number of vertical lines to the first number of vertical lines. Between the down-sampling and the up-sampling, video compression and de-compression may also be performed using, for example, standard compression and de-compression techniques. <IMAGE>