Influence of Synchronization Signal Inaccuracy on DVB-T2 Local Content Insertion

The article is aimed at specifying criteria of synchronization signal inaccuracy when DVB-T2 system local content re-placement cannot be carried out. Some settings of digital information stream are set as the initial data. The first part of the article specifies network delay calculation method. The second part of the article considers the signal cycle instability impact on estimation of local content device delay during its insertion in global information flow. Network delay saw-toothlike dependence on time is revealed, statistical parameters of synchronization signal instability are specified.  The third part of the article deals with analysis of method of substitution of two independent information flows by regionali-zation device. A model of T2 superframes comprising baseband frames (BB frames) which belong to different physical layer pipes (PLP) is described. The conditions under which the local information insertion becomes impossible are de-fined. Besides, the article considers other reasons of failure during single frequency networks (SFN) processing of local content insertion dealing with synchronization error at different stages of information flow digital content generation and delivery to DVB-T2.

Regionalization of Content, T2-MI Digital Stream, the Signal of Synchronization, Timestamp, T2 Super Frame, Physical Layer Pipes, Network Delay, Inaccuracy, the Device of Local Content Insertion

1. ETSI TS 102 773 V1.3.1. DVB; Modulator Interface for a Second Generation Digital Terrestrial Television Broadcasting System (DVB-T2). Introduction 01-2012. Available at: http://www.etsi.org/deliver/etsi_ts/102700_102799/102773/01.03.01_60/ts_102773v010301p.pdf (accessed: 16.02.2018).

2. Karyakin V. L., Karyakin D. V., Morozova L. A. Methods of TV Broadcasting in the Standard DVB-T2 with Inserts Regional Content. T-Comm. 2016, vol. 10, no. 4, pр. 41–46. (In Russian)

3. Kukharskaya O. V., Savin E. Z. Physical features of the replacement of information content in a digital stream for DVB-T2. Uspekhi sovremennoi radioelektroniki [Telecommunications and Radio Engineering]. 2017, no. 6, pp. 55–63.

4. Lhermitte R., Chauviere B., Denlau E. DVB-T2 Broadcasting Method with Publication the Insertion of Regional Content, and Device Used in The Method. Patent US 2013/0215328 A1, August 22, 2013.

5. Kukharskaya O. V., Savin E. Z. Tekhnologiya zameshcheniya informatsionnogo kontenta v potoke T2-MI [Technology Replacement of Information Content in the Flow of T2-MI] Trudy Vserossiiskoi nauchno-prakticheskoi konferentsii tvorcheskoi molodezhi s mezhdunarodnym uchastiem. DVGUPS. 2016, vol. 1, pp. 141–144.

6. The Device for Inserting Local Content. Manual. Available at: http://www.triadatv.ru/upload/iblock/646/PLP-Repleyser_Rukovodstvo-po-ekspluatatsii-V3.0.pdf (accessed: 20.02.2018).

7. Recommendation ITU-R TF.1011-1. Systems, techniques and services for time and frequency transfer. Introduction 1994. Available at: http://www.triadatv.ru/upload/iblock/646/PLP-Repleyser_Rukovodstvo-po-ekspluatatsii-V3.0.pdf (accessed: 20.02.2018).

8. EN 302 755 V1.4.1. DVB; Framing Structure, Channel Coding and Modulation for a Second Generation Digital Terrestrial Television Broadcasting System (DVBT2). Introduction 07-2015. France: European Telecommunications Standards Institute, 2015. Available at: http://www.etsi.org/deliver/etsi_en/302700_302799/3027 55/01.04.01_60/en_302755v010401p.pdf (accessed: 20.02.2018).