www.rohde-schwarz.com/technology/isdb-t MPEG-2 multiplexer TS remultiplex Guard interval addition OFDM frame structure Frequency interleaving Time interleaving Combining of hierarchical levels IFFT Bit interleaving Carrier modulation f s : MHz = 8.126984 MHz 63 512 Mapping Bit interleaving Carrier modulation Mapping Bit interleaving Carrier modulation Mapping Pilot signals TMCC signal Convolutional coding Bytes –> bits /5$ ƛTUV Bytes –> bits /5$ ƛTUV Bits –> bytes /5$ ƛTUV Byte interleaving Delay adjust- ment Energy dispersal Convolutional coding Bytes –> bits /5$ ƛTUV Bytes –> bits /5$ ƛTUV Bits –> bytes /5$ ƛTUV Byte interleaving Delay adjust- ment Outer code (204,188) Division of TS into hierarchical levels Energy dispersal Convolutional coding Bytes –> bits /5$ ƛTUV Bytes –> bits /5$ ƛTUV Bits –> bytes /5$ ƛTUV Byte interleaving Delay adjust- ment Energy dispersal ISDB-T ISDB-T B ABNT NBR – 15602 – 15603 Japanese and Chinese character set ARIB STD-B24 ARIB STD-B10 ARIB TR-B14 MPEG-2 ISO/IEG 13818-1 DVB ETSI EN 300468 Differences to DVB NIT with ISDB system management descriptor with: – ISDB TS information descriptor – ISDB partial reception descriptor – ISDB terrestrial delivery system descriptor Additional EITs for different screens (signaled in SDT) Additional ISDB tables + ISDB descriptors Settings for mobile TV (partial reception) Transmitting control Video for HDTV and SDTV ISO/IEC 13818-2 H.262 MPEG-2 stream_type 0x02 Audio ISO/IEC 14496-3 MPEG-L2 stream _type 0x04 Audio ISO/IEC 14496-3 AAC-LC ADTS stream_type 0x0F Video for mobile TV ISO/IEC 14496-10 H.264 stream_type 0x1B Audio ISO/IEC 14496-3 HE-AAC ADT stream _type 0x0F Video for HDTV and SDTV and mobile TV Video ISO/IEC 14496-10 H.264 video stream_type 0x1B Audio ISO/IEC 14496-3 AAC-LATM/LOAS stream_type 0x11 SEI for active format description ITU-RT.35 Video coding Multiplexer Limited- reception processor Sound coding TS remultiplexing Source coding Data coding Video Sound BTS structure Information part or ISDB-T_Information_Packet Multiplex position 8 byte 188 byte 8 byte Parity (option) Data TS TS A + B + C C B A 12 10 8 6 4 2 0 1 3 5 7 9 11 Layer A Layer B Layer B Layer C Stationary reception Mobile reception Layer C Mode Mode 1 (2K) Mode 2 (4K) Mode 3 (8K) Bandwidth 5.573 MHz Sample frequency 512/63 MHz = 8.126984 MHz Number of carriers Total 108 × 13 + 1 = 1 405 216 × 13 + 1 = 2 809 432 × 13 + 1 = 5 617 Data 96 × 13 = 1 248 192 × 13 = 2 496 384 × 13 = 4 992 Effective symbol length 252 μs 504 μs 1008 μs Carrier modulation QPSK, 16QAM, 64QAM, DQPSK ISDB-T/ISDB-T B : The Versatile Standards TV, Mobile TV and Sound Broadcasting The Japanese approach to digital terrestrial TV is terrestrial integrated services digital broadcasting (ISDB-T) and was adopted in 1999. A special form of ISDB-T is the 1-segment mode (partial reception), which is used for mobile TV applications. For terrestrial digital sound broadcasting ISDB-T sb has been created by adapting the spectral bandwidth and omitting the video content. Parts of Latin America adopted the ISDB-T standard for terrestrial broadcasting under the name ISDB-T B with slight changes in the content layer. Key performance features of ISDB-T/ISDB-T B : Simultaneous broadcasting of HD, SD and mobile TV J content in one channel Orthogonal frequency division multiplexing (OFDM) for J robustness and single frequency networks (SFN) Divison of one channel into 13 segments for flexible J spectrum allocation Segments can be allocated to transmission layers A, B, C J Bit and time interleaving for improved mobile and indoor J reception Selection of Rohde & Schwarz solutions for ISDB-T/ISDB-T B ¸SFE100 test transmitter ¸SFU broadcast test system ¸SFE broadcast tester ¸DVSG digital video signal generator ¸ETL TV analyzer Rohde & Schwarz TV transmitters Full range of ISDB-T/ISDB-T B transmitters & transposers PD 5214.2856.82 V 01.00 (sv) Rohde & Schwarz provides a wide variety of transmitter and test & measurement products for the major global standards. Over 50 years of experience in sound and TV broadcast applications make Rohde & Schwarz a quali- fied partner for network operators and electronic equip- ment manufacturers. Glossary: AAC = Advanced Audio Coding; ABNT = Associação Brasileira de Normas Técnicas; ABNT NBR = ABNT technical standard; ADTS = Audio Data Transport Stream; ARIB = Association of Radio Industries and Businesses; BTS = Broadcasting Transport Stream; ETSI = European Telecommunications Standards Institute; HD = High Definition; IEC = International Electrotechnical Commission; IFFT = Inverse Fast Fourier Transformation; ISDB = Integrated Services Digital Broadcasting; ISDB-T = ISDB for Terrestrial Television Broadcasting; ISDB-TB = ISDB for Terrestrial Television Broadcasting Brazil; ISO = International Organization for Standardization; MPEG = Moving Picture Experts Group; MSB = Most Significant Bit; NIT = Network Information Table; OFDM = Orthogonal Frequency Division Multiplex; QAM = Quadrature Amplitude Modulation; QPSK = Quadrature Phase Shift Keying; SD = Standard Definition; TMCC = Transmission and Multiplexing Configuration Control; TS = Transport Stream; TV = Television BTS multiplexer Baseband structure Constellation TMCC parameter Transmission spectrum OFDM parameter ISDB-T/ISDB-T B block diagram ¸ ¸ ¸ ¸E E ET T TL L L T T T T T T TV V V V V V V V V a a a an n n na a al l ly y yz z z ze e er r r