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Lei authored
based on the latest discussion in the HW working group about how loop filter should be integrated with tiles, the following decisions have been made: 1. two seperated flages should be added for loop_filter_across_tiles_enabled for horizontal tile boundary and vertical tile boundary. 2. encoder and decoder should only check these two flags to determine whether loop filtering (including deblocking, CDEF and loop restoration) should cross tile boundaries (vertical and/or horizontal) or not regardless the horitontal depepdent tile flag. This change list implemented the support for two seperated loop_filter_across_tiles_enabled flags for vertical and horizontal tile boundaries. The new experiment is disabled as default before it is adopted. Change-Id: I814377947517f5419c08b004a3b71b950d01eadd
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