Patent ID: 9020294
Filing Date: 2015-04-28
Classification: G06T,H04N

Abstract:
1. A method for reducing artifacts in coded pictures comprising: computing one or more sets of metrics for a picture, wherein each set of metrics are computed based on applying one or more different coding methods; selecting one or more coding methods from the applied one or more different coding methods, wherein selection of the one or more coding methods is based on the computed one or more sets of metrics; coding the picture with the selected one or more coding methods; creating a database of spatio-temporal statistics and coding parameters that result in image artifacts and wherein selecting one or more coding methods based on the computed metrics comprises: selecting coding parameters for the picture; determining if the coding parameters cause image artifacts by accessing the database; and if the coding parameters do not cause image artifacts, coding the picture with the selected coding parameters; and if the coding parameters cause image artifacts, pre-filtering the picture and coding the pre-filtered picture with the selected coding parameters.