Because　of　self-occlusion,　browsing　3D　objects　is　naturally　a　random　access　problem.　After　compression,　if　only　data　of　visible　regions　under　the　current　viewing　parameter　are　transmitted　and　decoded,　the　network　bandwidth　and　decoding　resources　can　be　saved.　Almost　all　state　of　the　art　mesh　compression　schemes　did　not　take　random　access　into　account.　We　propose　a　wavelet　transform　based　progressive　mesh　compression　scheme　which　incorporates　random　accessibility.　The　mesh　is　partitioned　into　many　blocks,　the　detail　of　each　block　is　encoded　independently,　then　only　detail　of　visible　blocks　are　transmitted.　The　wavelet　coefficients　which　represent　detail　are　grouped　into　zerotrees,　and　each　zerotree　is　encoded　independently　using　a　modified　SPIHT　algorithm.　The　experimental　results　indicate　the　proposed　scheme　has　achieved　comparable　compression　efficiency　with　PGC,　and　only　about　60%　of　total　bit-stream　is　required　to　reconstruct　visible　regions.