Download Digital Video Broadcasting (DVB): The International Standard by Ulrich Reimers PDF

By Ulrich Reimers

This moment variation presents first-hand information regarding the latest advancements within the intriguing and fast paced box of telecommunications media and purchaser electronics. The DVB workforce constructed the factors that are getting used in Europe, Australia, Southeast Asia, and lots of different elements of the area. a few one hundred fifty significant television broadcasting businesses in addition to providers for technical gear are contributors of the venture. This commonplace is predicted to be accredited for world wide electronic HDTV broadcasting. This booklet is readable for non-experts with a historical past in analog transmission, and demonstrates the interesting probabilities of electronic expertise. For the second one variation, the total textual content has been up-dated completely. the newest DVB criteria are incorporated in 3 new sections on Interactive tv, facts Broadcasting, and The Multimedia domestic Platform.

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Extra resources for Digital Video Broadcasting (DVB): The International Standard for Digital Television

Example text

However, this spectral noise shaping of the LLlM of the first order cannot suffice for practical applications with an effective resolution of, for example, 16 bits. By cascading several such circuits it is possible to obtain higher LLlM orders, which make the required noise reduction in the baseband possible [CANDY, GRAY]. 9. Hit DACfor audio signals with oversampling taneously reducing the external clock frequency to Is. Usually this operation is carried out by a number of series-connected sub fIlters.

8. Spectra of quantisation errors of l-bit ADCs for audio signals with oversampling sented by the operation 1/(1-Z-I ) [PARK, AGRAW]. At this point the integrator causes the quantisation error Q(z) in the output signal Y(z) to be weighted with a high-pass characteristic (1-Z-I ), whereas the input signal X(z) remains unweighted. As opposed to this, both components in the LiM are unweighted in their frequency responses after demodulation. 8 show these effects. A 1bit ADC in the baseband fB with a Nyquist sampling frequency ofIs =2IB distributes the power density NoQ of its quantisation error evenly in this area with a correspondingly high value.

The aurally compensated evaluation of the quantisation noise (with some tolerance) leads to an empty-channel noise level of 14 dB above the quantisation noise level [JAKUBOW, HESSNM]. The remaining differences of 74 dB or 98 dB represent the actual usable level ranges. If an SIN ratio of 20 dB is allowed at the lowest passages, then a usable signal dynamics of 54 dB and 78 dB is obtained. The level diagrams illustrate why a quantisation of 20 bits or more is appropriate in the professional studio.

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