MPEG2 Macroblock

while ( nextbits() == '0000 0001 000')

macroblock_escape

macroblock_address_increment

if (macroblock_quant)

quantiser_scale_code

if (macroblock_motion_forward ||

(macroblock_intra && concealment_motion_vectors))

if (macroblock_motion_backward)

if (macroblock_intra && concealment_motion_vectors)

marker_bit

if (macroblock_pattern)

for ( i=0; i<block_count; i++) {

}
}