Abstract: A pet door hood is adapted to partially enclose the exterior and/or interior of a pet door or other animal access opening. The pet door hood may be formed to protect the pet door from weather, from entry by stray animals, and/or from entry or access by humans. The pet door hood may be formed integrally with a pet door or optionally integrally with a panel having a pet door. Optionally, the pet door hood may be formed separately from the pet door or aperture, or panel having a pet door therein The pet door hood may be adapted for assembly with a pet door or aperture.

Abstract: A method for reading and using partial data from a portable data carrier includes reading data from a portable data carrier, determining if any data is missing, and if any data is missing, restructuring the data for use, such as for running an audio decoder and expander. A method for writing data to a portable data carrier having limited capacity includes receiving a data file and optimizing at least one encoding parameter to fit at least a portion of the data file into the portable data carrier.