关键词: H.264实时高清解码, 并行解码, 并行滤波, 众核处理器, TILEPro64平台

Abstract: In the demand of real-time decoding of high-definition video stream, a multi-layer parallel algorithm is proposed. First, this algorithm distributes tasks to the processors according to the decoding function module and optimizes the load-balance between processors through the secondary partition of the function module. Then, in the loop-filter module, this algorithm processes the macro blocks parallelly according to the dependency relationship between the macro blocks. Experimental results indicate that this algorithm improves the efficiency and the parallelization of the decoder, realizes the real-time decoding of high-definition video stream on the TILEPro64 platform. This algorithm speeds up the decoding process by 10.01 at most, achieves a 80% performance increase of speedup comparing to the existing parallel algorithm.

Key words: H.264 real-time high-definition decoding, parallel decoding, parallel filter, many-core processor, TILEPro64 platform