基于3D-SPIHT的立體視頻圖像壓縮編碼
An efficient coding algorithm for stereo video with 3D-SPIHT
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摘要: 該文提出一種新的立體視頻編碼方案:在輔助序列中進(jìn)行視差補(bǔ)償預(yù)測(cè)和三維等級(jí)數(shù)集合分區(qū)(3D-SPIHT)編碼,3D-SPIHT算法建立在真三維小波分解基礎(chǔ)上,通過(guò)定義一種新的時(shí)空方向樹(shù)結(jié)構(gòu),實(shí)現(xiàn)了靜止圖像SPIHT算法的三維擴(kuò)展,實(shí)驗(yàn)結(jié)果表明該方案的編碼性能略高于傳統(tǒng)方案,具有較低的計(jì)算復(fù)雜度,所產(chǎn)生的嵌入式輔助序列碼流,可根據(jù)通道帶寬自適應(yīng)調(diào)整輸出碼率,最大限度地提高輔助序列的質(zhì)量。
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關(guān)鍵詞:
- 立體視頻編碼; 三維小波變換; 等級(jí)數(shù)集合分區(qū)
Abstract: This paper presents a new strategy for efficiently coding stereo video sequences. In the scheme, the auxiliary sequence is coded by disparity compensated prediction and 3D-SPIHT algorithm. 3D-SPIHT algorithm is based on genuine 3D wavelet transform, and implements a three dimensional extension of SPIHT in still image coding by defining a new spatio-temporal orientation tree structure. The scheme can provide comparable performance to the conventional method with minimal computational complexity and produce an embedded bit stream in the auxiliary sequence. According to channel bandwidth, the bit rate can be adaptively adjusted so that the best quality of the auxiliary sequence is obtained. -
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