Patent ID: 8804819

Claim:
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; and setting values of pixels in the modified frame that are spatially-correspondent with pixels in the enhancement layer portion to a special value, and encoding 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; and copying 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, and encoding the temporary frame.