By Amitabh Kumar
Enforce cutting-edge cellular television networks with this finished consultant to the most recent applied sciences and criteria, together with MediaFLO, ATSC cellular DTV, and CMMB, an identical applied sciences seeing large-scale rollouts at the present time worldwide. You not just achieve deep perception into the maze of applied sciences, but additionally the foundations of cellular content-what makes it paintings, how it is produced, repurposed and brought securely, and the way it integrates with cellular and web domains. know about the major enablers of a cellular television provider, like smartphones, chipsets, and cellular software program. achieve entry to a close examine the networks deployed all over the world with real-world case reviews. The informative diagrams offer wealthy visualization of the recent applied sciences, providers, and profit types. achieve realizing of ways cellular television may be made interactive and the way it may be brought seamlessly in a number of markets. Get perception into the turning out to be functions of multimedia handsets and software program which drives cutting edge purposes. writer Amitabh Kumar starts with the fundamentals of cellular multimedia and progresses to hide information of applied sciences, networks, and firmware for cellular television providers. effortless to keep on with, imposing cellular television contains a wealthy presentation that incorporates dozens of FAQs and "Quick Facts." This re-creation is up to date to mirror the quick evolving international of cellular television, concentrating on elements for fulfillment and offering realizing of: * 3G, Terrestrial broadcast, and cellular WiMAX networks * MediaFLO, ATSC cellular DTV, and CMMB Broadcasting * allowing applied sciences and protocols, spectrum, and possibilities for deployment * content material defense, conditional entry and DRM for the cellular international, according to OMA-BCAST Smartcard and DRM profiles * Handset beneficial properties for cellular television and multimedia prone * perception into making content material interactive-traffic, climate, interactive polling, exact ads * Roaming and interoperability in multimedia networks
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Additional resources for Implementing Mobile TV, Second Edition: ATSC Mobile DTV, MediaFLO, DVB-H SH, DMB,WiMAX, 3G Systems, and Rich Media Applications (Focal Press Media Technology Professional Series)
Digital cinema has a typical resolution of 4 K, in full aperture (4096ϫ3112), and has 12 million pixels per frame as opposed to 2 million for HDTV. 5: Image quality and pixel size (or grain size). Most mobile phones today have high enough resolution to support either 320ϫ240 or 640ϫ480 image resolution. An iPhone 3G, for example has a screen resolution of 480ϫ320 pixels, which is half of VGA resolution. However, it has 163 pixels per inch, giving a good perceived image quality. In general, the screen can display only low-resolution images in mobile phones.
The compression of video builds on the techniques for compression of pictures such as JPEG compression using DCT. As each frame represents largely the same picture, with motion in some areas of the picture, the techniques of frame prediction and interpolation are used in addition to the compression of the picture itself represented in the frame. All the compression techniques take advantage of the redundancies that are present in the video signal to reduce the bit rates of video for use in digital TV, mobile TV, IP TV, and other networks.
8). 8: Bit Rates for Small Screen Devices. 16: Compressing video. , scaling and compression—for reduction of bit rates. 64 megapixels per second. 3 K pixels per frame) and 15 frames per second, the required transmission rate is only 380 K pixels per second. 38 megapixels, which is a scaling down of approximately 23 times. The ﬁnal bit rate is of course determined by how many bits are required to carry each pixel. This is the domain of compression. The pixels are now ready to be subject to compression, the ﬁrst stage of which would begin by formation of 8ϫ8 macro blocks and application of DCT process, Huffman Coding, RLE, object-based coding, and so on, based on the compression protocol employed.