IEC 61883-4 pdf download Consumer audio/video equipment – Digital interface – Part 4: MPEG2-TS data transmission
This part of lEC 61883 describes the packetization and the transmission timing for MPEG2transport streams for the lEEE 1394 digital interface. lt describes the specifications for theIEEE 1394 packet, the CIP header and the transmission timing for use with the transportstream as specified in prETS 300468.This explanation is based on the transport stream asspecified in DvB.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 61883-1,Consumer audio/video equipment – Digital interface – Part 1: General
ISO/IEC 13818-1，Information technology – Generic coding of moving pictures and associatedaudio information: Systems
ISO/IEC 13818-2,Information technology – Generic coding of moving pictures and associatedaudio information: Video
ISO/IEC 13818-3,Information technology – Generic coding of moving pictures and associatedaudio information – Part 3: Audio
ISO/IEC 13818-9,Information technology – Generic coding of moving pictures and associatedaudio information – Part 9: Extension for real time interface for system decoders
prETS 300 468,Digital broadcasting systems for television，sound and data services -Specification for Service Information (Sl) in digital video broadcasting(DVB) systems
3Terms, definitions, and abbreviations
For the purposes of this document, the following abbreviations apply:CIP
Common Isochronous Packet
Cycle Time Register
Digital Video Broadcasting (in Europe)
European Telecommunication Standard
Moving Picture Experts Group
Real Time Interface
Transport Stream Packet
IEEE 1394 packet IEEE 1394 isochronous packet defined in lEC 61883-1
4 Construction of IEEE 1 394 packet
4.1 Structure of the MPEG2-TS data stream
The length of the source packet is 1 92 bytes (see Figure 1 ). The source packet consists of one MPEG2-TSP with a length of 1 88 bytes and a source packet header of 4 bytes. The source packet header contains a time stamp.
MPEG2-TS packets shall comply with ISO/IEC 1 381 8 series.
4.2 Packetization of source packet of the MPEG2-TS data stream
A source packet is split into 8 data blocks with a length of 6 quadlets. Zero or more data blocks are packed in an IEEE 1 394 isochronous packet. A receiver of the isochronous packets shall collect the data blocks of one source packet and combine them in order to reconstruct the source packet before sending this source packet to the application. There are restrictions on the transmission of fractions (see 5.2). Active transmitters shall send an isochronous packet in every cycle. If not enough data is available to transmit in the isochronous packet, then an empty packet shall be transmitted.