By H.R. Wu, K.R. Rao
The hand is faster than the attention. in lots of instances, so is electronic video. retaining snapshot caliber in bandwidth- and memory-restricted environments is readily changing into a fact as thriving study delves ever deeper into perceptual coding innovations, which discard superfluous information that people can't approach or realize. Surveying the subject from a Human visible process (HVS)-based procedure, electronic Video snapshot caliber and Perceptual Coding outlines the foundations, metrics, and criteria linked to perceptual coding, in addition to the newest innovations and applications.This e-book is split widely into 3 elements. First, it introduces the elemental concept, strategies, rules, and methods underlying the sphere, equivalent to the fundamentals of compression, HVS modeling, and coding artifacts linked to present famous concepts. the following part specializes in photograph caliber overview standards; subjective and aim tools and metrics, together with imaginative and prescient version dependent electronic video impairment metrics; checking out techniques; and overseas criteria relating to picture caliber. eventually, sensible purposes come into concentration, together with electronic photograph and video coder designs according to the HVS in addition to post-filtering, recovery, mistakes correction, and concealment techniques.The permeation of electronic photographs and video during the international can't be understated. Nor can the significance of protecting caliber whereas utilizing minimum cupboard space, and electronic Video picture caliber and Perceptual Coding offers the instruments essential to accomplish this goal.Instructors and academics wishing to use this paintings as a textbook can obtain a presentation of 786 slides in PDF structure prepared to enhance the textual content. accompany our book(H.R. Wu and K.R. Rao, electronic Video picture caliber and Perceptual Coding, CRC Press (ISBN: 0-8247-2777-0), Nov. 2005)for teachers or teacher to take advantage of for his or her sessions in the event that they use the e-book.
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Extra info for Digital Video Image Quality and Perceptual Coding
Since the DCT is separable, the two-dimensional DCT can be obtained by computing 1-D DCT in each dimension separately. 3. 8: 2-D (8 × 8) DCT basis images. The DCT breaks up an image area into discrete frequencies in two dimensions. 8. The top left image represents the mean intensity, DC value. The 2-D DCT of image data is basically a structural decomposition in terms of its corresponding basis images. 9: Blocking artifact by the DCT; a) a test image, b) the inverse DCT with (4 × 4) low-frequency coefficients, c) the inverse DCT with (2 × 2) low-frequency coefficients, and d) the inverse DCT with only the DC coefficient.
5 Continuing Work and Directions . . . . . . . . . . . 6 Summary . . . . . . . . . . . . . . . . . 1 Introduction . . . . . . . . . . . . . . . . 1 Outline . . . . . . . . . . . . . . . 2 Noise Visibility and Visual Masking . . . . . . . . . . 3 Architectures for Perceptual Based Coding . . . . . . . . 1 Masking Calculations . . . . . . . . . . . 2 Perceptual Based Rate Control .
1 Outline . . . . . . . . . . . . . . . 2 Noise Visibility and Visual Masking . . . . . . . . . . 3 Architectures for Perceptual Based Coding . . . . . . . . 1 Masking Calculations . . . . . . . . . . . 2 Perceptual Based Rate Control . . . . . . . . . 1 Macroblock level control . . . . . . . . 2 Picture level control . . . . . . . . . 3 GOP level control . . . . . . . . . . 3 Look Ahead .