【摘要】：針對(duì)數(shù)字音視頻編解碼技術(shù)標(biāo)準(zhǔn)(AVS2)中對(duì)數(shù)域二進(jìn)制算術(shù)編解碼(LBAC)技術(shù)的碼流補(bǔ)充過(guò)程在參考軟件中實(shí)現(xiàn)效率低下的問(wèn)題,提出一種基于雙字節(jié)和單字節(jié)聯(lián)合補(bǔ)充碼流的高效碼流補(bǔ)充方法。首先,根據(jù)LBAC解碼算法中的比特流輸入需求在解碼區(qū)間偏移量中預(yù)留一定的比特位作為緩沖區(qū);然后,當(dāng)緩沖區(qū)內(nèi)的剩余碼流不夠下次解碼時(shí),根據(jù)可補(bǔ)充碼流的位數(shù)向緩沖區(qū)內(nèi)補(bǔ)充雙字節(jié)或單字節(jié)的碼流。實(shí)驗(yàn)結(jié)果表明,在全I(xiàn)幀(AI)、低延遲P幀(LDP)、隨機(jī)訪問(wèn)(RA)等配置下的常用視頻測(cè)試序列中,該方法均能夠?qū)崿F(xiàn)18%左右的LBAC解碼性能提升。所提算法能夠簡(jiǎn)化參考軟件中的碼流補(bǔ)充過(guò)程,為L(zhǎng)BAC算法的進(jìn)一步優(yōu)化提供基礎(chǔ),并能有效降低AVS2技術(shù)標(biāo)準(zhǔn)的整體解碼時(shí)間。
[Abstract]:Aiming at the problem of low efficiency in the reference software of the bitstream supplement process of binary arithmetic codec (LBAC) technology in digital audio / video coding and decoding standard (AVS2), In this paper, an efficient bitstream supplementation method based on double byte and single byte complementary bitstream is proposed. Firstly, according to the bitstream input requirement of LBAC decoding algorithm, a bit is reserved as buffer in the decoding interval offset. Then, when the remaining bit stream in the buffer is not enough for the next decoding, the double-byte or single-byte bit stream is added to the buffer according to the number of bits of the complementary bit stream. The experimental results show that the proposed method can improve the performance of LBAC decoding by about 18% in all I frame (AI), low delay P-frame (LDP), random access (RA) and other commonly used video test sequences. The proposed algorithm can simplify the code stream supplement process in reference software, provide the basis for further optimization of LBAC algorithm, and effectively reduce the overall decoding time of AVS2 technical standard.
【作者單位】： 武漢興圖新科電子股份有限公司;95899部隊(duì)自動(dòng)化中心;
【分類號(hào)】：TN919.8

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