Last year, worldwide digital cable set top box unit shipments hit a record 27.5 mln, a significant increase over the 15.6 mln units shipped in 2005. In conjunction with the huge increase in unit shipments, digital cable set top box revenues also set a new annual record. Worldwide product revenues 2006 reached $4.2 bln, up from $3.1 bln in 2005. Total Chinese digital cable set top box unit shipments exceeded 9 mln 2006, up from just over 2 mln in 2005, In-Stat says.