Đang chuẩn bị nút TẢI XUỐNG, xin hãy chờ
Tải xuống
The standard consists of four parts each covering a different structure of the transmitter network: covers sheer terrestrial transmission with single and multi-aerial structures that require only a single aerial and tuner on the receiver side; covers sheer terrestrial transmission with multi-aerial structures on both ends. Terminals suitable for this profile need to employ two tuners as well. | Digital Video Broadcasting Digital Video Broadcasting DVB Next Generation broadcasting system to Handheld physical layer specification DVB-NGH DVB Document A160 November 2012 Digital Video Broadcasting 3 Contents Intellectual Property Rights.10 Foreword.10 1 Scope.11 2 References.11 2.1 Normative references.12 2.2 Informative references . 12 3 Definitions symbols and abbreviations.12 3.1 Definitions.12 3.2 Symbols.16 3.3 Abbreviations. 22 Part I Base profile.25 4 System overview and architecture.26 4.1 Input processing.27 4.1.1 Mapping of input streams onto PLPs.28 4.1.2 Encapsulation into baseband frames.28 4.2 Bit-interleaved coding and modulation MISO precoding.29 4.2.1 FEC encoding and interleaving inside a FEC block.29 4.2.2 Modulation and component interleaving.29 4.2.3 Formation of interleaving frames for each PLP.29 4.2.4 Time interleaving inter-frame convolutional interleaving plus intra-frame block interleaving .29 4.3 Frame building frequency interleaving.30 4.3.1 Formation of logical frames.30 4.3.2 Mapping of logical frames onto NGH frames.31 4.3.3 Logical channel types.33 4.3.4 Single tuner reception for frequency hopping.33 4.4 OFDM generation.34 5 Input processing.35 5.1 Mode adaptation.35 5.1.1 Input formats.35 5.1.1.1 Transport Stream packet header compression.36 5.1.2 Input interface.38 5.1.3 Input Stream Synchronization optional .39 5.1.4 Compensating delay .39 5.1.5 Null Packet Deletion optional for TS only ISSY -LF ISSY-BBF and ISSY-UP modes .39 5.1.6 Baseband frame header BBFHDR insertion.40 5.1.7 Mode adaptation sub -system output stream formats.41 5.1.7.1 ISSY-LF mode TS GSE and GCS.42 5.1.7.2 ISSY-UP mode TS and GSE.43 5.2 Stream adaptation.43 5.2.1 Scheduler.44 5.2.2 Padding. 44 5.2.3 Use of the padding field for in-band signalling.44 5.2.3.1 In-band type A. 45 5.2.3.2 In-band type B.49 5.2.4 Baseband frame scrambling.49 6 Bit-interleaved coding and modulation.50 6.1 FEC encoding.50 6.1.1 Outer encoding B CH .51 6.1.2 Inner encoding LDPC
