變長(zhǎng)碼作為一種最流行的數(shù)據(jù)壓縮技術(shù)，已被許多數(shù)據(jù)壓縮標(biāo)準(zhǔn)，如JPEG，MPEG-2和H.263 等作為編碼方法。但由于解碼過程中的循環(huán)依賴性，限制了解碼吞吐率。本文介紹
了一種基于分組方法的低功耗變長(zhǎng)解碼器結(jié)構(gòu)，它是利用變長(zhǎng)編碼本身的信息冗余降低功耗的,通過設(shè)計(jì)添加一個(gè)鎖存器的方法來縮短變長(zhǎng)解碼器的關(guān)鍵路徑，描述了一個(gè)對(duì)變長(zhǎng)碼表進(jìn)行分組控制的有限狀態(tài)機(jī)控制器，從而達(dá)到高吞吐率輸出的目的。
關(guān)鍵詞：低功耗；變長(zhǎng)解碼器；關(guān)鍵路徑
Abstract：Variable-length code (VLC) is the most popular data-compression technique which has been used in many data compression standards, such as JPEG, MPEG-2, and H.263. The recursive iteration of the decoding process limits the achievable decoding throughput. A low
power variable length decoding architecture based on table partitioning is presented, which exploits the signal statistics of variable length codes. High throughput was achieved mainly by adding a latch to reduce the critical path of the VLD. And a kind of method to design the finite state machine (FSM) controller is proposed, which is used to partition the VLC table.
Keywords: low power; variable length decoder (VLD); critical path