Methods and apparatus for encoding and decoding video subframes (e.g.,
lower-resolution video) with a DVC video coder are disclosed. The
disclosed embodiments allow a DVC video coder to efficiently code a
subframe. The disclosed encoder embodiments redistribute blocks of data
from a subframe to correspond with the staggered locations used for video
segment creation. This separates video segments at the DVC coder output
into two groups--those largely or completely composed of subframe data,
and those containing discardable data. The present invention allows a DVC
coder to be used efficiently for several different video resolutions, or
in a low-resolution system.