運(yùn)動(dòng)序列的短期統(tǒng)計(jì)特性
SHORT-TERM STATISTICAL CHARACTERISTICS FOR MOVING SEQUENCES
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摘要: 本文利用動(dòng)態(tài)圖象序列研究了運(yùn)動(dòng)序列的短期統(tǒng)計(jì)特性,對每個(gè)宏塊經(jīng)過壓縮后所產(chǎn)生的比特?cái)?shù)進(jìn)行了分析,研究了量化比例因子和量化加權(quán)矩陣對短期統(tǒng)計(jì)特性的影響.統(tǒng)計(jì)結(jié)果表明,量化比例因子對每個(gè)宏塊比特?cái)?shù)的概率分布影響最為明顯,量化加權(quán)矩陣對分布特性的輪廓影響很小,當(dāng)量化比較精細(xì)時(shí)圖象內(nèi)容對分布特性的低比特部分影響比較明顯,而粗量化時(shí)它的影響較弱.
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關(guān)鍵詞:
- 分組視頻; 異步轉(zhuǎn)移模式; 活動(dòng)圖象專家組
Abstract: Short-term statistical characteristics of moving sequences is discussed in this paper. To get reasonable results, real time motion image sequences are used, bit numbers of each macroblock after encoding using MPEG(Moving Pictures Experts Group) compression algrithom is analyzed.In the mean time, the effect of quantiser scale and quantiser matrix to the statistical property is also researched. Simulation result shows that quantiser scale plays a important role in the statistical property, while quantiser matrix has little influence. If small quantiser scale is adopted, image contents will affect the probability distribution at low bit end, and its influence decreases as the quantiser scale is relatively large. -
Verbiest,et al. Impact of the ATM concept on video coding. IEEE J of SAC, 1988, SAC-6(12):1623-1632.[2]Mitsuru Nomura,et al. Basic characteristics of variable rate video coding in ATM environment. IEEE J of SAC, 1989,SAG7(6):752-760.[3]Zhang Ya-Qin, et al. Variable bit-rate video transmission in broadband ISDN environment[J].Proc IEEE.1991,79(2):214-221[4]Karlsson,et al. Packet video and its integration into the network architechure. IEEE J of SAC, 1989, SAG7(6):739-751.[5]Maglaris Basil,et al. Perfomance model of statistical multiplexing in packet video communications. IEEE Trans on COM, 1988, COM-37(7): 834-844.[6]Pancha, El Zarki. Bandwidth-allocation schemes for variable-bit-rate MPEG sources in ATM networks[J].IEEE Trans. on CAS, Video Techn.1993, 3(6):190-198[7]Daniel P Heyman,et al. Statistical analysis and simulation study of video teleconference traffic in ATM networks[J].IEEE Trans. on CAS, Video Tech.1992,2(3):49-59[8]Chin H S,et al. Statistics of video signal for viewphone-type pictures. IEEE J of SAC, 1989,SAC-7(6):826-832. -
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