分类号 |
G06F13/00;H04H20/93;H04H60/48;H04H60/82;H04L29/06;H04L29/12;H04N5/445;H04N5/45;H04N7/08;H04N7/081;H04N7/14;H04N7/173;H04N21/2343;H04N21/235;H04N21/422;H04N21/431;H04N21/435;H04N21/438;H04N21/462;H04N21/47;H04N21/4725;H04N21/478;H04N21/4782;H04N21/643;H04N21/81;H04N21/858 |
主分类号 |
G06F13/00 |