1、I STD.SMPTE RP 209-ENGL 2000 1111 83574011 0004382 158 = SMPTE RECOMMENDED PRACTICE RP 209-2000 Format for Transmission of HD-D5 Compressed Video and Audio Data over 360 Mb/s Serial Digital Interface 1 Scope This practice defines the data stream used for syn- chronous transmission of HD-D5 compresse
2、d video and audio data over 360 Mb/s serial digital interface (SDI) for the 525160 system as defined in ANSUSMPTE 259M. This practice does not define data stream structure applicable for transmission over the serial data trans- port interface (SDTI), SMPTE 305M. 2 Normative references The following
3、standards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this practice are encouraged to investigate the possibi
4、lity of applying the most recent edition of the standards indicated below. ANSVSMPTE 259M-1997, Television - 1 O-bit 4:2:2 Component and 4fsc Composite Digital Signals - Serial Digital Interface ANSVSMPTE 272M-1994, Television - Formatting AES/EBU Audio and Auxiliary Data into Digital Video Ancillar
5、y Data Space SMPTE 342M-2000, Television - HD-D5 Com- pressed Video 1080i and 72Op Systems - Encoding Process and Data Format 3 DIF block mapping HD-D5 compressed digital video data, assembled as a DIF block stream, are mapped onto an SDI video field for transmission. Pagel of 5 pages 3.1 DIF block
6、and DIF slice One field of 1080/60 or one frame of 720p/60 compressed video is represented by 5760 DIF blocks defined in SMPTE 342M as shown in figure 1. 5760 DIF blocks are divided into 480 DIF slices, each DIF slice comprising 12 DIF blocks. DIF blocks in one field (1080i) or one frame (720p) of v
7、ideo are num- bered from O through 5759. Likewise, DIF slices are numbered from O through 479. The relationship between the DIF block number (BN) and the DIF slice number (SN) within the video field or frame is as shown below: SN = int (BN / 12) where BN = O to 5759 DIF slice structure is shown in f
8、igure 2. 3.2 Mapping of DIF blocks over SDI DIF blocks shall be mapped into 360 Mb/s SDI that is specified in ANSVSMPTE 259M. One 1OOi field or one 720p frame of 5760 DIF blocks, containing 489,600 words, are mapped into a rectangular area of 1920 word columns (from sample number O to 191 9 horizont
9、aliy) by 255 word rows (from line number 9 to 263 in the first field or from line number 271 to 525 in the second field vertically) on SDI. In the case of 1080, DIF blocks of the first field compressed video data shall be mapped into the first field of SDI and DIF blocks of the second field compress
10、ed video data shall be mapped into the second field of SDI, respec- tively. One field contains 480 slice cells. One slice cell is composed of 4 word columns by 255 word rows. The siice cell structure over SOI is shown in figure 3. Copyright0 2000 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGIN
11、EERS 595 W. HaWe Ave., white Plains, NY 10607 (914) 761-1 100 Approved May 12,2000 STD*SMPTE RP 209-ENGL 2000 8357403 0004383 094 m SN=O O 1 2 3 RP 209-2000 4 5756 5757 5758 5759 -_-_-_- O 1 2 3 Byte Number in DIF Block i : o, 1, 2, - 83, a4 SN = 479 5743 5749 5750 5751 5752 5755 5756 5757 Figure 1
12、- DIF block 5758 SN= 1 12 13 14 15 16 I I I- - - - - - ! I ! Page 2 Of 5 pages STD-SMPTE RP 209-ENGL 2000 e 8357401 0004184 T20 RP 209-2000 I CNI 012345678- A. o 1 2 3 4 5 6 I I l I I I I I I I I 9 10 11 - - - I - Slice Cell fi AN : DIF Area Number (O to 11) BN : DIF Block Number (O to 5759) CN : Sl
13、ice Cell Number (O to 479) SN : DIF Slice Number (O to 479) 4 words SDI Video Field EAV SAV Figure 3 - Slice cell structure over SDI Each DIF slice (see figure 2) is allocated into each slice cell according to the following expression: CN = (SN x 4) mod 480 + int (SN / 120) where SN: DIF slice numbe
14、r CN: slice cell number Each slice cell is divided into 12 DIF areas. The DIF area, consisting of 85 words, has four different area configurations; .e., type A through D as shown in figure 4. Each DIF area is identified by a DIF area number (AN). The DIF block number (BN), DIF area number (AN), and
15、slice cell number (CN) are corre- lated through the following expressions: CN = int (BN / 12) x4 mod 480 + int (BN/ 1440) AN = BN mod 12 where BN = O to 5759 3.2.1 Bit allocation _ne Number 1st field2nd field) - 9 I 271 I I I I l I I I I I I I I I I I I l I l I I l I I I I I I I I I I I - 263J525 Da
16、ta bits of a DIF block byte are placed into an SDI data word (see figure 5) as follows: Data bits o a DIF block byte: B7 through Bo of SDI bit - 87: MSB of DIF block byte - BO: LSB of DIF block tyte - 88 is error flag (EF) for 87 through BO - B9 is the complement of B8 (EF = O: No error exists in 87
17、 through BO) (EF = 1 : Error exists in B7 through BO) 4 Audio data The audio data format and transmission format shall conform to ANSIEMPTE 272M. Page 3 of 5 pages RP 209-2000 A 255 words - STD.SMPTE RP 209-ENGL 2000 8357403 0004385 9b7 Slice Cell AN=O TY Pe A . AN=1 J I Type B AN=2 TypeCr AN=3 Type
18、 D AN=8 Type A 7 I AN=9 TYP 13 AN = 10 TypeCr AN=l1 Type D 4 AN words DIF Area Type A o i 1 i 2 i 3 ByteNumber 4f5i6 7i;i;i 1;iiiit 80 f 81 i 82 i 83 84 DIF Area Type B y in a DIF Block . 85 words / DIF Area lilt1 i1 w IOilj2 3f4 f5 i6 1:iiiii .ifiilii li1 iijl r) 79 i 80 i 81 83i84 I i 82 : DIF Are
19、a Figure 4 - DIF area type and byte allocation of DIF blocks Page 4 of 5 pages STD.SMPTE RP 209-ENGL 2000 W 8357403 0004386 8T3 E I I 1 I I I I I 1 I I I I I EF (MSB) Data bits of a DIF Block byte (LSB) EF : Error Flag E : Complement of Error Flag Figure 5 - Bit allocation Annex A ( informative) Bibliography SMPTE 305M-2000, Television - Serial Data Transport Interface RP 209-2000 Page 5 of 5 pages -
