1、 Table of contents 1 Scope 2 Normative references 3 SDTI header data 4 Data structure 5 Transmission format 1 Scope This standard specifies the data structure and the transmission format of DV compressed video, audio, and data over a serial data transport interface (SDTI SMPTE 305.2M ). The standard
2、 is a combination of video, audio, subcode, and control data optimized for the connection between DV-compliant VCRs and disk systems. It ensures high-speed data stream transfer up to five times faster than real time. The video, audio, and subcode data comply with IEC 61834-2 for both 525/60 and 625/
3、50 systems. The bit stream consists of 77-byte DIF data blocks, which are common to other DV based signals. The DIF blocks are mapped onto SDTI using a frame-bounded algorithm preserving ease of manipulating the video and audio data. The layers of signal processing and related standards are shown in
4、 figure 1. NOTE For descriptions of the SDTI, refer to SMPTE 305.2M, and for descriptions of video, audio, and subcode data, refer to IEC 61834-2. The standard corresponds to data type 241h registered as DVCAM- 1 in SMPTE 305.2M. 2 Normative references The following standards contain provisions whic
5、h, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent
6、edition of the standards indicated below. SMPTE 305.2M-2000, Television Serial Data Transport Interface (SDTI) IEC 61834-2 (1998-08), Recording Helical-Scan Digital Video Cassette Recording System Using 6,35 mm Magnetic Tape for Consumer Use (525-60, 625-50, 1125-60 and 1250-50 Systems) Part 2: SD F
7、ormat for 525-60 and 625-50 Systems Page 1 of 16 pages SMPTE 322M-2004 Revision of SMPTE 322M-1999 SMPTE STANDARD for Television Format for Transmission of DV Compressed Video, Audio and Data Over a Serial Data Transport Interface Copyright 2004 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINE
8、ERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 ApprovedMay 10, 2004SMPTE 322M-2004 Page 2 of 16 pages 3 SDTI header data The SDTI header data shall contain the parameters specified in SMPTE 305.2M, and shall be repeated on every line. For information, the header data is shown in ta
9、ble 1, and the SDTI header data structure is as shown in figure 2. Figure 1 Signal processing layers and related standards Table 1 Header data packet Parameters Length Value ADF 3 words 000h 3FFh 3FFh DID 1 word 140h SDID 1 word 101h DC 1 word 22Eh Line number 2 words Line number CRC 2 words Code 4
10、bits 1h AAI 4 bits Destination address 16 words Source address 16 words Block type 1 word 1C1h CRC flag 1 word 101h Reserved data 1 word 200h Reserved data 4 words 200h 200h 200h 200h Header CRC 2 words CS 1 word SMPTE 322M-2004 Page 3 of 16 pages Figure 2 SDTI header data structure 4 Data structure
11、 The following clause describes the basic data structure and the system parameters of the bit stream. The data structure of the SDTI payload is shown in figure 3. The data block consists of a control data block and five vertical data slots, in which one compressed video stream shall be contained. Th
12、e empty space and reserved area shall be set to 200has default value. HEADER 3FF 000 XYZAncillary Data 3FF 000 000 000 000 CRC-1 CRC-0 CRC-1 CRC-0 3FF PAYLOAD 276(288) 1440(1440)1716(1728) 000 000 XYZDataCount CRC-0 CRC FlagRESERVE -0 RESERVE -1 RESERVE -3 RESERVE -4 EAV 000 XYZXYZEAV SAV The figure
13、s in ( ) are for 625 Line System 0 4 8 10 11 26 27 42 43 SDTI HEADER DATA PACKET 53words 52 3FF 000 3FF 3FF DataIDLineNumber-0LineNumber-1CRC-1 Code0 when REC MODE of the AAUX source control pack is other than 111. 2 A-2 REC MODE: 1 when REC MODE of the AAUX source control pack is 111 (invalid recor
14、ding); 0 when REC MODE of the AAUX source control pack is other than 111. 3 V REC MODE: 1 when REC MODE of the VAUX source control pack is 11 (invalid recording); 0 when REC MODE of the VAUX source control pack is other than 11. 4 V STYPE, A STYPE, AP3, AP2, AP1, and APT are set to 0, which is the v
15、alue for SD DV as specified in IEC 61834. 5 A-1 QU and A-2 QU are 2-bit values and set to the values of QU (quantization) in the AAUX source packs specified in IEC 61834. Although IEC 61834 defines QU to have 3 bits, the actual specified values in IEC 61834 are within the 2 LSB bits, thus the 2 LSB
16、bits can be used. SMPTE 322M-2004 Page 6 of 16 pages 4.3.1 Secondary data type The control data block and the data slots are preceded with a secondary data type (1 word), with which the entire data block is defined. The initial code shall be set to all zero, and the receiver shall attempt to decode
17、the data as soon as the desired secondary data type (i.e., “0000 0001”) is detected. Value Description 0000 0000 Initial code 0000 0001 Data block as defined 0000 0010 | Reserved 1111 1111 4.3.2 Transfer mode The transfer mode specifies the desired transfer speed of the compressed video stream. The
18、following transfer speed can be selected: Value Description 000 Reserved 001 Normal speed (1X) 010 2X speed 011 3X speed 100 4X speed 101 5X speed 110 Reserved 111 Reserved 4.3.3 LOCK LOCK indicates whether the VCR is being servo locked or not during the data transfer. Value Description 0 VCR servo
19、unlocked 1 VCR servo locked 4.3.4 AUDIO INVALID AUDIO INVALID indicates the validity of the audio data. When the AUDIO INVALID flag is active (1), the receiver shall not attempt to decode the audio data. Value Description 0 Audio data valid 1 Audio data invalid 4.3.5 VIDEO INVALID VIDEO INVALID indi
20、cates the validity of the video data. When the VIDEO INVALID flag is active (1), the receiver shall not attempt to decode the video data. Value Description 0 Video data valid 1 Video data invalid SMPTE 322M-2004 Page 7 of 16 pages 4.3.6 Common parameters Other parameters contained in bytes 3 to 10 a
21、re common information to the international standard (IEC 61834). 4.4 Data slot Each data slot consists of 280 words, and shall start from the word number address shown below. The data shall be contained in the first 256 bytes, and the last 24 bytes are reserved for future extensions. At normal speed
22、 (1X), only slot 1 shall be used. As the speed is increased (2X, 3X, 4X and 5X), the other slots shall be progressively filled with data. Word address Number Slot 1 16 Slot 2 296 Slot 3 576 Slot 4 856 Slot 5 1136 4.5 Endcode The endcode as specified in SMPTE 305.2M shall be present at the word numbe
23、r address 1416 on line 525 for the 525/60 system, or line 625 for the 625/50 system. Parameters Length Value Endcode 1 word 30Ah 5 Transmission Format The following clause describes the overall transmission format and the detailed data structure of the com-pressed video stream. 5.1 Digital interface
24、 format (DIF) The data structure of the video, audio, and subcode in the DIF blocks shall be as specified in IEC 61834-2. However, the 3-byte ID shall not be carried over the interface (see figures 4, 5, and 6). The DIF blocks shall be mapped onto the data slots using a frame-bounded algorithm, whic
25、h is different in sequence from the one specified in IEC 61834-2. Figure 4 Data in the video section DataDataIEC-61834-2 IDNot used This Standard 3 77V0 to V134 SMPTE 322M-2004 Page 8 of 16 pages Figure 5 Data in the SC/VAUX section DataDataIDNot used IEC-61834-2 This Standard 3 48 29 ReservedReserv
26、edSC0, SC1 DataDataIEC-61834-2 IDNot used This Standard 3 77VA0, VA1, VA2 Figure 6 Data in the Audio/AAUX section DataDataIEC-61834-2 IDNot used This Standard 3 77A0 to A8 SMPTE 322M-2004 Page 9 of 16 pages 5.2 525/60 system The data block shall be transmitted from line 12 through line 525, provided
27、 that valid data shall not exist on lines 911 and 272274 for the 525/60 system as shown in figure 7. The areas in lines 247271 and 5108 are reserved for future extensions. There are invalid data spaces following the valid DIF packets, as shown in figures 7, 8, and 9, at the ends of lines 152, 223, 2
28、31, 246, 345, 486, 494, and 509. As it is invalid data, the data is of no use, not specified and therefore can be set with any value. 5.2.1 Video sections The video sections are contained in lines 12223 and 275486 (see figure 8): (n, V0) (n, V134); n = 0 to 9 5.2.2 SC/VAUX sections The SC/VAUX secti
29、ons are contained in lines 224231 and 487494 (see figure 9): (n, SC0), (n, SC1), n, VA0), (n, VA1), (n, VA2); n = 0 to 9 5.2.3 Audio/AAUX sections The audio/AAUX sections are contained in lines 232246 and 495509 (see figure 9): (n, A0) (n, A8); n = 0 to 9 5.3 625/50 system The data block shall be tr
30、ansmitted from line 8 through line 625, provided that valid data shall not exist on lines 57 and 318320 for the 625/50 system as shown in figure 10. The areas in lines 289317 and 6024 are reserved for future extensions. There are invalid data spaces following the valid DIF packets, as shown in figur
31、es 10, 11, and 12, at the ends of lines 176, 261, 271, 288, 405, 574, 584, and 601. As it is invalid data, the data is of no use, not specified and therefore can be set with any value. 5.3.1 Video sections The video sections are contained in lines 8261 and 321574 (see figure 11): (n, V0) - (n, V134)
32、; n = 0 to 11 5.3.2 SC/VAUX sections The SC/VAUX sections are contained in lines 262271 and 575584 (see figure 12): (n, SC0), (n, SC1), (n, VA0), (n, VA1), (n, VA2); n = 0 to 11 5.3.3 Audio/AAUX sections The audio/AAUX sections are contained in lines 272288 and 585601 (see figure 12): (n, A0) (n, A8
33、); n = 0 to 11 SMPTE 322M-2004 Page 10 of 16 pages Figure 8 Video sections for 525/60 system Compressed Video Data1 450X80 =36000 Words (141 Lines) 2 SAV EAV 161440 22 268 280 280 280 280 280 SC/VAUX 25X80=2000 (8 Lines) Audio/AAUX 45X80=3600 (15 Lines) Compressed Video Data2-2 225X80=18000W (71 Lin
34、es) Reserved Reserved Compressed Video Data2-1 225X80=18000 W (71 Lines) Compressed Video Data3 450X80 =36000 Words (141 Lines) SC/VAUX 25X80=2000 (8 Lines) Audio/AAUX 45X80=3600 (15 Lines) Reserved Compressed Video Data1 450X80 =36000 Words (141 Lines) Reserved Reserved Reserved Reserved Compressed
35、 Video Data1 450X80 =36000 Words (141 Lines) Compressed Video Data1 450X80 =36000 Words (141 Lines) Compressed Video Data1 450X80 =36000 Words (141 Lines) Compressed Video Data2-1 225X80=18000 W (71 Lines) Compressed Video Data2-1 225X80=18000 W (71 Lines) Compressed Video Data2-1 225X80=18000 W (71
36、 Lines) Compressed Video Data2-1 225X80=18000 W (71 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) Audio/AAUX 45X80=3600 (15 Lines) Audio/AAUX 45X80=3600 (15 Lines) Audio/AAUX 45X80=3600 (15 Lines) Audio/AAUX 45X80=3600 (15
37、Lines) Reserved Reserved Reserved Reserved Compressed Video Data2-2 225X80=18000 W (71 Lines) Compressed Video Data2-2 225X80=18000 W (71 Lines) Compressed Video Data2-2 225X80=18000 W (71 Lines) Compressed Video Data2-2 225X80=18000 W (71 Lines) Compressed Video Data3 450X80 =36000 Words (141 Lines
38、) Compressed Video Data3 450X80 =36000 Words (141 Lines) Compressed Video Data3 450X80 =36000 Words (141 Lines) Compressed Video Data3 450X80 =36000 Words (141 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) SC/VAUX 25X80=2000 (8 Lines) Audio/AAUX 45X80=
39、3600 (15 Lines) Audio/AAUX 45X80=3600 (15 Lines) Audio/AAUX 45X80=3600 (15 Lines) Audio/AAUX 45X80=3600 (15 Lines) Reserved Reserved Reserved Reserved Data block header (6words) Control Data block (10words) CRC End Code S D T I HE A D E R 9 1Compressed Video Data1 450X80 =36000 Words (141 Lines) 8 1
40、112 152 153 223 224 231 232 246 247 271 44272 274275 345 494487 486 510 495 525 346 R E S E R V E D R E S E R V E D 1stSlot 2ndSlot 3rdSlot 4thSlot 5thSlot Data=200h Data=200h Figure 7 Transmission format for 525/60 system SMPTE 322M-2004 Page 11 of 16 pages Figure 8 Video sections for 525/60 system
41、 SMPTE 322M-2004 Page 12 of 16 pages Figure 9 SC/VAUX and audio/AAUX sections for 525/60 system SMPTE 322M-2004 Page 13 of 16 pages Compressed Video Data1 450X80 =36000 Words (141 Lines) 2 SAV EAV 16 1440 22 280 280 280 280 280 280 SC/VAUX 30X80=2400 (10 Lines) Audio/AAUX 54X80=4320 (17 Lines) Compr
42、essed Video Data2-2 270X80 =21600 Words (85 Lines) Reserved Reserved Compressed Video Data2-1 270X80 =21600 Words (85 Lines) Compressed Video Data3 540X80 =43200 Words (169 Lines) SC/VAUX 30X80=2400 (10 Lines) Audio/AAUX 54X80=4320 (17 Lines) Reserved Reserved Reserved Reserved Reserved Reserved Res
43、erved Reserved Reserved Reserved Reserved Reserved Reserved Data block header (6words) Control Data block (10words) CRC S D T I HE A D E R 51 Compressed Video Data1 540X80 =43200 Words (169 Lines) 4 78176 177 261 262 271 272 288 289 317 4 4 318 320 321 405 601 584 575 574 602 585 625 406 R E S E R V
44、 E D R E S E R V E D 1stSlot 2ndSlot 3rdSlot 4thSlot 5thSlot Data=200h Data=200h Figure 10 Transmission format for 625/50system Compressed Video Data1 540X80 =43200 Words (169 Lines) Compressed Video Data1 540X80 =43200 Words (169 Lines) Compressed Video Data1 540X80 =43200 Words (169 Lines) Compres
45、sed Video Data1 540X80 =43200 Words (169 Lines) Compressed Video Data2-1 270X80 =21600 Words (85 Lines) Compressed Video Data2-1 270X80 =21600 Words (85 Lines) Compressed Video Data2-1 270X80 =21600 Words (85 Lines) Compressed Video Data2-1 270X80 =21600 Words (85 Lines) SC/VAUX 30X80=2400 (10 Lines
46、) SC/VAUX 30X80=2400 (10 Lines) SC/VAUX 30X80=2400 (10 Lines) SC/VAUX 30X80=2400 (10 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) Compressed Video Data2-2 270X80 =21600 Words (85 Lines) Compressed Video Dat
47、a2-2 270X80 =21600 Words (85 Lines) Compressed Video Data2-2 270X80 =21600 Words (85 Lines) Compressed Video Data2-2 270X80 =21600 Words (85 Lines) Compressed Video Data3 540X80 =43200 Words (169 Lines) Compressed Video Data3 540X80 =43200 Words (169 Lines) Compressed Video Data3 540X80 =43200 Words
48、 (169 Lines) Compressed Video Data3 540X80 =43200 Words (169 Lines) SC/VAUX 30X80=2400 (10 Lines) SC/VAUX 30X80=2400 (10 Lines) SC/VAUX 30X80=2400 (10 Lines) SC/VAUX 30X80=2400 (10 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) Audio/AAUX 54X80=4320 (17 Lines) End Code SMPTE 322M-2004 Page 14 of 16 pages Figure 11 Video sections for 625/50 system SMPTE 322M-2004 Page 15 of 16 pages Figure 12 SC/VAUX and audio/AAUX sections for 625/50 system SMPTE 322M-2004 Page 16 of 16 pages Annex A (informativ
