Optimal Timing Device for Quantizer Scale Code in MPEG Decoder

摘要

The present invention provides a preselected buffer FIFO2 506 which receives a quantizer scale code from a variable length decoder 501 in an MPEG decoder and inputs it to latch 1 507 according to a read request of a run-length decoder 503; A latch 1 (507) for outputting the quantizer scale code affected by the FIFO2 to the latch 2 (508) by a load 1 signal which is the same signal as the read request signal of the run-length decoder; And a latch 2 (508) for receiving a load 2 signal, which is an upgrade request of the quantizer scale code of the inverse quantizer 505, and inputting the quantizer scale code inputted from the latch 1 to the inverse quantizer. The quantizer scale code update request of the inverse quantizer can be matched without time delay and data loss, and there is an advantage in that inappropriate data is not input to the inverse quantizer when the macroblock is skipped.