基于h.264的幀內(nèi)預(yù)測(cè)和碼率控制技術(shù)的研究

1、南京航空航天大學(xué)碩士學(xué)位論文基于H.264的幀內(nèi)預(yù)測(cè)和碼率控制技術(shù)的研究姓名：周蘆明申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：劉春生20090101基于 H.264 的幀內(nèi)預(yù)測(cè)和碼率控制技術(shù)的研究 ii Abstract With the new application’s emergence of IPTV and mobile video, compression coding technology for video i

2、s deeply developed. H.264/AVC is the newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group, which integrates and extends a number of new video compress techniqu

3、es and algorithms. H.264 has achieved a significant improvement in compression performance and a “network -friendly” representation relative to all existing standards. Firstly, the principle of video coding technique and

4、 the development history of video coding standard are introduced in this paper. Then, H.264 is analyzed totally, which includes the critical technique of H.264, the principle of each module, the frame work and the range

5、of application etc. The technique and recent research of intra-frames prediction and rate control are studied. Intra-frame prediction which can improve the performance of coder is an important part of H.264.After the lac

6、k of Intra-frame prediction mode selection for H.264 is talked, a fast mode method of intra-frame prediction is proposed in this paper. It uses the method that the mode selections between luma prediction and chroma predi

7、ction are separated. And it utilizes the histogram and calculates the DCT coefficient for each 4×4 block to find out the direction of texture so as to avoid unnecessary computations and sort out the best predict mod

8、e quickly. Experimental results show that with little degradation in coding gain, the new algorithm can improve the speed of intra coding obviously. Rate control，which is an important part of video compression, is to reg

9、ulate the coded bits tream to satisfy the channel condition and improve the reconstructed video quality. In this paper, the classical bit ratc control algoritlms are reviewed firstly, and then the rate control strategy f

10、or H.264 is analyzed deeply. For the lack of rate control strategy in H.264, new frame layer and macro-block rate control algorithms in which a Kalman filter and a fuzzy controller are applied are proposed. The experimen

11、tal results show that, compared to original algorithm, the proposed rate control algorithms can allocate the bits more rationally, and forecast MAD more accurately, thereby improve the accuracy of estimating the quantiza