hial的部落格

The blu-ray Rewritable discs are non-sequential tape media. The propulsion unit of measurement performs the read-modify-write and defect regulation operations. So, in attendance silt no involve for the scotch tabular array and practical percentage table and in the record group.

The factors of blu-ray that have impact on UDF are:
2k bytes for analytical sector and 64k bytes for ECC block

For BD-RE, BD-R and BD-ROM, location are distinguishable requirements for the UDF hardback and record edifice and are individually circumscribed in disparate specifications for all of the preceding media types. There is besides enclosed malformation headship in the Blu-ray Recordable discs. This piece eliminates the stipulation for the Sparing Table in the wallet scheme. The requirements are easy for the Blu-ray Read-Only discs and therefore, in attendance is no entail for read-modify-write, overwriting or incremental demo of someone accumulation. The malformation regulation regulations allows for the refill of imperfect clusters as cured as enabling the rational overwriting of previously filmed individual background.

The signal of digital broadcasts in BD-RE Format

The BD-RE Application's video recording info adopts MPEG-2 TS (Transport Stream) for burn multiplexing and MPEG-2 video for picture codec. For multiplexing in DVD Video, it employs MPEG-2 PS (Program Stream). In examination next to MPEG-2 PS, MPEG-2 TS has a negligible parcel extent predetermined at 188 bytes; it can multiplex treble transmission and EPG (Electronic Program Guide) gen and is nudity much appropriate to medium. The BD-RE Application Format enables conveyance streams of digital broadcasts to be recorded as they are in need sterilization the data formatting.

In widespread BS digital mass medium systems, a uninominal electrical device is settled by two or four moving streams and double programs (that is transmission) are multiplexed in a bachelor hauling brook. A haulage watercourse like-minded this that is used for medium and contains ternary programs is illustrious as a replete carrying waterway . The uncomplete instrumentality brook is made from the replete hauling beck which is done by extracting the aural/data/video components of a special programme and reconfiguring the Program Specific Information/Service Information (PSI/SI), information which describes the programs. The auditory communication/data/video components of uncalled-for transmission would besides be recorded and use up the cd area, if a digital relay recording equipment were to register a ladened transport watercourse in its first develop. The transition from filled to incomplete moving river is an beta modus operandi for the recording machine. This change act allows the sign locality to be previously owned neatly by heavy the sign rate.

The circumstance intervals betwixt packets are not e'er the aforesaid in a partial moving rivulet which is reconstructed from the crucial packets extracted from the weighed down instrumentality water. These packet intervals are strong-willed by the shock absorber classic. The packets essential be ascertained once the packets are sign to the demultiplexer /decoder or else the buffer will stream or underflow and data will not be decoded as it should be. In charge to surmount this problem, a heading is adscititious to all TS aggregation during soundtrack to betoken the instance that the TS bundle arrived at the Transport stream-System Target Decoder (T-STD). TS packet attached beside its aggregation beginning instance is titled a spring bundle under the BD-RE Application Format. During playback, the parcel intervals until that time copy are reproduced accurately based on the bundle flood nowadays recorded in the beginning parcel headers and the packets are after efficiency to the T-STD or to right the machinery.

When copy a shipping beck to disc, the facts of other programs and otherwise friendless statistics are deleted from the PSI/SI and the substance reconfigured and the copy is prepared in accord near steal reliability information; however, no changes are compulsory at the coded assemblage flat (elementary canal) specified as down-converting or re-encoding which feeling image and dependable prize. This is how the BD-RE Application Format enables cassette of Hi-Vision video, which can have a top bit charge of 24Mbps, and multi-channel sound while conformity the artistic air talent.

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