Технологии цифрового телевизионного вещания в стандартах DVB

Пособие предназначено для бакалавров и магистров, обучающихся по специальности «Цифровое телерадиовещание». Рассмотрены методы передачи сигналов цифрового телевидения в системах второго поколения DVB-S2/Т2 – спутникового и наземного телевизионного вещания. Приведены краткие сведения о формировании транспортных потоков при передаче телевизионных сигналов изображения и сигналов звукового сопровождения, рассмотрены методы помехоустойчивого кодирования и модуляции. Приводится расчёт скорости передачи данных в системах DVB-T и DVB-T2/S2. Подробно рассмотрены – системы наземного цифрового телевизионного вещания DVB-Т2, профиль T2-LITE, особенности одночастотных сетей, структуры пакетов транспортного потока T2-MI, шлюз T2-G и интерфейс модулятора T2-MI. Большое внимание уделяется структуре данных сигнализации L1, которая используется для передачи служебной информации. Digital Television deals with all present-day TV transmission methods, i.e. MPEG, DVB, ATSC and ISDB-T. The DVD Video is also discussed to some extent. The discussion is focussed on dealing with these subjects in as practical a way as possible. Although mathematical formulations are used, they are in most cases only utilized to supplement the text. The book also contains chapters dealing with basic concepts such as digital modulation or transformations into the frequency domain. A major emphasis is placed on the measuring techniques used on these various digital TV signals. Practical examples and hints concerning measurement are provided. The book starts with the analog TV baseband signal and then continues with the MPEG-2 data stream, digital video, digital audio and the compression methods. After an excursion into the digital modulation methods, all the mentioned transmission methods are discussed in detail. Interspersed between these are found the chapters on the relevant measuring technique.

Digital Television closely examines all present-day TV transmission methods. These include MPEG, DVB, ATSC and ISDB-T. DVD is also discussed. The text covers these subjects in a practical-minded manner. Although mathematical formulations are used, they are in most cases only utilized to supplement the text. The book also contains chapters dealing with basic concepts such as digital modulation or transformations into the frequency domain. A major emphasis is placed on the measuring techniques used on these various digital TV signals. Practical examples and hints concerning measurement are provided. The book starts with analog TV base and signal, continues with MPEG-2 data stream, digital video, and digital audio, and then moves on to compression methods. After an excursion into the digital modulation methods, all the mentioned transmission methods are discussed in detail.

Throughout the world, there are only two major analog television standards, the 625-line system with a 50 Hz frame rate and the 525-line system with a 60 Hz frame rate.