Method for detecting class errors in a transmitted image signal encoded by classified vector quantization

摘要

A novel method for detecting class errors in the image signal which has been transmitted in a compressed form by using a classified vector quantization technique comprises the steps of selecting reference blocks out of neighboring blocks of the current block; calculating an error detecting function using the class name for the current block and the reference blocks; and determining the error for the current block by comparing the calculated error detecting function with a predetermined threshold.