Motion Estimation Affine Parameter Transformation Classifier Image frame

研究方法 Motion Estimation Affine Parameter Transformation Classifier Image frame Low Level Feature Detection Knowledge Database(Bayes ian Network) Frame-Based Maker Semantic representation

FGS structure n n Base layer: Intra-coding Enhancement layer: Inter-coding

Temporal-Scalable Coding Based on Image Content

Fractal Modulation n n Time and frequency diversity and multi-rate system Time-frequency portrait

Synchronization Technique and System Model

Multiple Description Coding for Wireless Image Transmission using Multiple Antennas n 主要觀念是利用multiple description coding（MDC）將 原本的影像分成兩個有關聯性的descriptions（可用 transform based的方法來得到），再經由channel coding ( 包含error detection and correction code)，以及space-time block coding，再用兩個transmit antennas把這兩個有 coding保護的descriptions傳送出去。Channel的部分可用 AWGN channel或用Jake’s model來模擬。接收端則經由 與傳送端相反的步驟把這兩個descriptions解碼回來。Fig 1. 是整個系統的架構圖。

System Description Channel Tx 1 Rx 1 Channel Encoder Source Space Time Block Encoder MD Encoder Channel Encoder Tx 2 Rx 2 Space Time Block Decoder & Channel Decoder MD Decoder Fig 1. The system structure of multiple description coding for wireless image transmission using multiple antennas.

System Block Diagram Server Scalable Video Source Video Layer 3 Receiver 1 Video Layer 2 Video Layer 1 Layered Multicast Group Internet MDS Code Generator FEC Layer 2 FEC Layer 1 Receiver n