Method and apparatus for encoding video using data frequency

摘要

A system, apparatus, and method for encoding and decoding a video image having a plurality of frames is disclosed. The method includes identifying in at least one frame a base layer portion primarily composed of low frequency data and an enhancement layer portion primarily composed of high frequency data. The method also includes encoding the base layer portion using a first encoding technique that encodes at a higher quality than a second encoding technique and encoding the enhancement layer portion using the second encoding technique.

主权项

1. A method for encoding a video signal that includes a plurality of frames, the method comprising:
identifying in at least one frame a base layer portion primarily composed of low frequency data and an enhancement layer portion primarily composed of high frequency data; encoding the base layer portion using a first encoding technique that encodes at a higher quality than a second encoding technique, wherein encoding the base layer portion includes:
creating a modified frame from the at least one frame by:
including all pixels in the base layer portion in the modified frame; andsetting values of pixels in the modified frame that are spatially-correspondent with pixels in the enhancement layer portion to a special value, andencoding the modified frame; and encoding the enhancement layer portion using the second encoding technique, wherein the at least one frame has lines of pixels and encoding the enhancement layer portion includes:
creating a temporary frame by using, for each line, the steps of:
identifying a line in the at least one frame; andcopying each pixel that is in the enhancement layer portion from the line to a new line in the temporary frame, a left-most pixel in the line's enhancement layer portion being copied to a first position in the new line, and any remaining pixels in the line's enhancement layer portion being copied to sequential positions in the new line, andencoding the temporary frame.