IEC 61834-9 pdf download Recording – Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1 1 25-60, 1 250-50 systems) – Part 9: DVB format
This part of lEC 61834 specifies the content, format and recording method for the data blocksforming the helical records on the tape containing audio， video and system data. This partdescribes the specifications for the recording of single DVB programmes. The DVB data isdelivered to the digital video cassette recorder via a digital interface or by a built-in tuner(IRD).The DVB data consist of an MPEG2 transport stream containing one or more programmes.
In DVB, the MPEG2 MP@ML is specified to encode the video signal.The maximum bit rate forthe video signal is 15 Mbps.One programme may consist of one video bit stream or severalaudio bit streams and data bit streams.
Due to the varied bit rates of single DVB programmes,several recording modes are specifiedin order to make efficient use of the storage capacity of the digital video cassette recorder.
ln addition to the normal play data stream of DVB recording, one or two special trick play datastreams may optionally be generated and recorded in the video area.
In this part 9, the data structure of a track is defined by APT = 000b which consists of fourareas as described in 4.3.2 of lEC 61834-1 and AP1 = AP3 = 000b.The data structure of MICis the same as in clause 10 of IEC 61834-2.
1.2 Normative references
The following normative documents contain provisions which,through reference in this text,constitute provisions of this part of lEC 61834.For dated references, subsequent amendmentsto,or revisions of，any of these publications do not apply.However，parties to agreementsbased on this part of iEc 61834 are encouraged to investigate the possibility of applying themost recent editions of the normative documents indicated below.For undated references, thelatest edition of the normative document referred to applies. Members of lEC and IS0 maintainregisters of currently valid lnternational Standards.
IEC 61834-1:1998，Recording – Helical-scan digital video cassette recording system using6,35 mm magnetic tape for consumer use (525-60,625-50，1125-60 and 1250-50 systems) -Part 1 : General specifications
IEC 61 883-1 :1 998, Consumer audio/video equipment – Digital interface – Part 1 : General
IEC 61 883-4:1 998, Consumer audio/video equipment – Digital interface – Part 4: MPEG2-TS data transmission
ETS 300 468:1 998, Specification for Service Information (SI) in DVB systems
EBU SBP 492:1 992, Teletext specifications
1 .3 Abbreviations
For the purposes of this part of IEC 61 834, the following abbreviations apply.
AAUX Audio auxiliary data
BCH code Base-Chaudhuri-Hocquenghem code, one of the well-known error correction codes
CGMS Copy Generation Management System
DCT Discrete cosine transform
DTV Digital Television (MPEG transmission in USA) (differs from ATV)
DVB Digital Video Broadcast (used for organization and the signal)
DVCR Digital Video Cassette Recorder
ECC Error Correction Code
ECC1 Inner error correction (within the SB)
ECC2 Outer error correction (within one track)
ECC3 Extra outer error correction (several tracks)
EIT Event Information Table
FEC Forward Error Correction (used in MPEG transmission)
GF Galois field
IRD Integrated Receiver Decoder
MIC Memory in Cassette
MP@ML Main Profile at Main Level
MPEG Motion Pictures Expert Group
NP Normal play