By Amitabh Kumar ZHU
Solely devoted to cellular television, this publication offers a close perception to cellular multimedia characterised effective compression options, protocols formalized by means of 3GPP or 3GPP2, services of broadcast, and cellular networks for offering multimedia content material. community specifications akin to spectrum; chipsets, software program and handsets which permit multimedia prone; supply systems and content material security applied sciences which supply profit insurance are lined intimately. Written with an international point of view, this booklet takes a close examine the networks deployed around the globe with examples and is wealthy in diagrams delivering awesome visualization of the hot technologies.* a whole advent and review of cellular multimedia, cellular television, and multimedia networks around the world* comprises multimedia prone for streaming, reside television, downloads, MMS, VoD within the cellular atmosphere* Describes allowing applied sciences and protocols comparable to MPEG-4, H.264, AAC+,3GPP-PSS and 3G-324M* special chapters on DVB-H, DMB and 3G applied sciences for cellular television* content material safeguard, conditional entry and DRM for the cellular global* Handset beneficial properties for cellular television and multimedia companies"
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Additional resources for Mobile TV: DVB-H, DMB, 3G Systems and Rich Media Applications
Example text
2-11). As the human eye perceives color details at lower acuity than luminance, the bandwidth of the color signals is kept lower than that of luminance. 5 MHz. 2 MHz (Fig. 2-12). 1 Analog Video Historically video has been handled in an analog format, a practice that continues today. While there was a move to complete the digitization of TV by 2006 in the United States, by 2012 in Europe, and by later dates in other countries, the receivers in most countries continue to remain analog. The NTSC standard is used in the United States, Japan, Canada, Taiwan, and Central America, among others.
This implies the individual sampling of Y, U, and V signals. As in the case of analog component video, an advantage can be taken by sampling the color signals at lower rates than the luminance signal without perceptible loss of quality. For this purpose it is usual to code the U and V components at half the bit rate of the luminance component. , for every four samples of Y there are two samples of U and two samples of V. This is accomplished by using half the sampling rate for the color signals U and V so that the number of samples generated is half that of the Y samples.
Red, green, and blue (called RGB in the video world). While this is a good way to represent the signals for processing, it has been more convenient to have the luminance and the color components carried separately. In a “black and white” TV, only the luminance signal is used, and historically, because at first all TV sets were monochrome, only the luminance component was used. For reasons of backward compatibility, the technology of transmission of the luminance and color signals separately was adapted for color TV.
