An Efficient Implementation of CAVLC for H.264/AVC

In H.264/AVC, the context-based adaptive variable length coding (CAVLC) is used for lossless compression. Direct table-lookup implementation requires higher cost because it employs a larger memory to produce the encoded results. A carefully reduced table is constructed and used for encoding in the design. With the helps of symbol mapping and codeword generating modules, our encoder can generate the CAVLC bitstream accurately. Compared with those previous designs, our method reduces up to 81% of memory size for storing those VLC tables used in H.264/AVC. Thus, our design is a good candidate for low-cost CAVLC