This paper proposes an efficient binary arithmetic encoder hardware architecture for CABAC (Context-based Adaptive Binary Arithmetic Coding) encoding. CABAC is an entropy coding method that is used in HEVC standard. Entropy coding removes statistical redundancy and supports a high compression ratio of images. However, the binary arithmetic encoder causes a delay in real time processing and parallel processing is difficult because of the high dependency between data. The operation of the proposed CABAC BAE hardware structure is to separate the renormalization and process the conventional iterative algorithm in parallel. The new scheme was designed as a four-stage pipeline structure that can reduce critical path optimally. The proposed CABAC BAE hardware architecture was designed with Verilog HDL and implemented in 65nm technology. Its gate count is 5.68K and maximum clock frequency is 1.11GHz. It processes the 2 bins per clock cycle. Maximum processing speed increased by 22% from existing hardware architectures. And Gate count has been reduced by 31%.

In this paper, we propose a hardware design of intra prediction angular mode decision for HEVC encoder. The intra prediction of HEVC includes a total of 35 modes and has better coding performance than H.264/AVC. However, high computational complexity and computation time are required to process all 35 modes. Therefore, this paper proposes a hardware structure using an efficient angular mode decision algorithm by the simple operation using the difference of the original pixel and its position. The hardware architecture of this paper reduces computation time by parallel processing from 4x4 block size to 64x64 block size. In this paper, we use a minimized arithmetic unit by determining the angular mode by predicting the direction through a simple operation unlike the existing structure. The proposed hardware architecture was designed using Verilog HDL, implemented on a 65nm technology, synthesized with Synopsys design compiler. Synthesized gate count amounted to 14.9K and the maximum operating frequency at 2GHz.