Video Streaming in Wireless Internet
نویسندگان
چکیده
2 Basics of Video Compression 9 2.1 Digital Video . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 Intra-frame Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.1 Block Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2.2 Discrete Cosine Transformation . . . . . . . . . . . . . . . . . . . . 12 2.2.3 Quantization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2.4 Zig–Zag Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.3 Inter-frame Coding: Motion Estimation and Compensation . . . . . . . . 15 2.3.1 Concept of I, P, B frames . . . . . . . . . . . . . . . . . . . . . . . 16 2.4 Variable Length Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.5 ISO/MPEG and ITU–T Standards for Video Encoding . . . . . . . . . . . 17
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