Abstract: Scalability became an important functionality of
video codecs employed in wireless transmission systems.
The paper describes a generic multi-loop coder structure
suitable for mixed spatial and temporal scalability
combined with fine granular SNR scalability. The
encoder exhibits extended capabilities of adaptation to
network throughput. The MPEG-2 and H.263 video
coding standards are used as a reference but the results
are also applicable to the MPEG-4 and H.26L systems
with minor modifications.