Image and Videl Comoression P5

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Image and Videl Comoression P5

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Recall the block diagram of encoders shown in Figure 2.3. There are three stages that take place in an encoder: transformation, quantization, and codeword assignment. Quantization was discussed in Chapter 2. Differential coding and transform coding using two different transformation components were covered in Chapters 3 and 4, respectively. In differential coding it is the difference signal that is quantized and encoded, while in transform coding it is the transformed signal that is quantized and encoded. In this chapter and the next chapter, we discuss several codeword assignment (encoding) techniques. In this chapter we cover two types of variable-length coding:...

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