Interlaced versus progressive scanning is an important issue when dealing with digital television. Not only because the change from analog to digital communication may be seen as an opportunity to move to other formats, but also because of the well-known artifacts of interlaced scanning (interline twitter, line crawling, and field aliasing) compared to the natural way of representing two-dimens...

A novel adaptive source-channel coding with feedback for progressive transmission of medical images is proposed here. In the source coding part, the transmission starts from the region of interest (RoI). The parity length in the channel code varies with respect to both the proximity of the image subblock to the RoI and the channel noise, which is iteratively estimated in the receiver. The overa...

-We present a layered packet video coding algorithm based on a progressive transmission scheme. The algorithm provides good compression and can handle significant packet loss with graceful degradation in the reconstruction sequence. Simulation results for various conditions are presented.

•Progressive compression and transmission. •For a given total transmission bit budget and packet loss rate: –How many layers to be sent? –How much protection should be used for each of the sent layers? •Previous work: –Constrained exhaustive search not optimal. –Poor block of packets (BOP) construction. •Our proposed solution: [1, 2, 4] –An exact algorithm linear time and space Optimal solution...

The most important features of the developed image database system include compressed domain indexing, searching by using scalable features, and progressive image transmission. User interaction is involved at both the search re nement stage and display of the query results. The indexing and searching algorithms are tightly coupled with the underlying image compression algorithm by means the ima...

Digital watermarking has been increasingly recognized as a highly effective means of protecting the intellectual property rights associated with multimedia data. Based on the multiresolution structures of wavelet decomposition, both on a real field and binary field, a multiresolution watermarking technique will be proposed. Since the Human Visual System (HVS) inherently performs a multiresoluti...

A new progressive image transmission technique using adaptive block truncation coding is introduced in this paper. The adaptive block truncation coding was proposed as a non-transform coding mode for edge blocks in digital video sequences. By adapting more sophisticated just-noticeable-diierence model of the human visual system, we can get an improved adaptive block truncation coding than the o...

We consider the progressive transmission of a lossy source across a power constrained Gaussian channel using binary phase-shift keying modulation. Under the theoretical assumptions of infinite bandwidth, arbitrarily complex channel coding, and lossless transmission, we derive the optimal channel code rate and the optimal energy allocation per transmitted bit. Under the practical assumptions of ...

multiple sclerosis (ms) is the most prevalent disease caused by the inflammatory demyelinating process that causes progressive nervous system degeneration over the time. optical coherence tomography (oct) is a non-invasive optical imaging technology, which can measure the thickness of retinal nerve fiber layer as well as the diameter of the macula. the purpose of the study is evaluation oct fin...