1、SMPTE 368M-2002 SMPTE STANDARD for Digital Television Tape Recording - 12.65-mm Type D-Il Format Page 1 of 62 pages Table of contents 1 Scope 2 Normative references 3 Abbreviations and acronyms 4 Environment and test conditions 5 Tape and cassette physical specifications 6 Tape record physical param
2、eters 7 Longitudinal track signal and magnetic parameters 8 Helical track signal parameters and magnetization Annex A Digital interfaces Annex B Tape transport and scanner Annex C Compatibility with other digital formats using type L derivative cassettes Annex D Compatibility with analog type L Anne
3、x E Bibliography 1 Scope This standard specifies the format for the recording of type D-1 1 compressed pictures, four channels of AES3 data, and associated data which form helical records on 12.65-mm (0.5 in) tape in cassettes. This standard also defines the helical track record parameters, the cont
4、ent and format of the longitudinal records, and the cassette physical specifications. Type D-11 picture compression is defined by SMPTE 367M. The recording format supports frame frequencies of 30/1 .O01 Hz, 25 Hz, 24 Hz, and 24/1 .O01 Hz. 2 Normative references The following standards contain provis
5、ions which, 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 mos
6、t recent edition of the standards indicated below. AES3-1992, Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data Copyright Om2 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved March 28,2002
7、 SMPTE 368M-2002 ANSVSMPTE 276M-1995, Television - Transmission of AES-EBU Digital Audio Signals Over Coaxial Cable. _ SMPTE 12M-1999, Television, Audio and Film - Time and Control Code SMPTE 292M-1998, Television - Bit-Serial Digital Interface for High-Definition Television Systems SMPTE 367M-2002,
8、 Television - Type D-I 1 Picture Compression and Data Stream Format SMPTE 369M-2002, Television - Type D-1 1 Data Stream and AES3 Data Mapping over SDTI IEC 61213 (1993-1 I), Analogue Audio Recording on Video Tape - Polarity of Magnetization IEC 61237-1 (1994-06), Broadcast Video Tape Recorders - Me
9、thods of Measurement - Part 1: Mechanical Measurements 3 Abbreviations and acronyms For the purposes of this standard, the following definitions apply: AUX: DCT: ECC: EOB: I-NRZI: MUX: VLC: Auxiliary Discrete cosine transform Error correcting code End of block Interleaved nonreturn to zero inverted
10、Multiplex Variable length coding 4 Environment and test conditions Tests and measurements made on the system to check the requirements of this standard shall be carried out under the following conditions: - Temperature: 20C f 1C - Relative humidity: 50%12% - Barometric pressure: - Tape tension: - Ta
11、pe conditioning: from 86 kPa to 106 kPa 0.3 N * 0.05 N not less than 24 h 4.1 Calibration tapes I Calibration tapes meeting the tolerances specified below should be made available by manufacturers of digital television tape recorders and players in accordance with this standard. 4.2 Record location
12、and dimensions l I Geometrical location and dimensions of the recordings on the tape and their relative positions in regard to timing relations of the recorded signals shall be as specified in figure 27 and table 1 in 6.2. Tolerances shown in table 1 should, however, be reduced by 50% for calibratio
13、n tapes. I Page 2 of 62 pages SMPTE 368M-2002 5 Tape and cassette physical specifications 5.1 Magnetic tape specifications 5.1.1 Base The base material shall be polyester or its equivalent. 5.1.2 Tape width and width fluctuation The tape width shall be 12.650 mrn A 0.005 mm. Tape width fluctuation s
14、hall not exceed 6 pm peak to peak. The value of tape width fluctuation shall be evaluated by measuring 10 points, each 20 mm apart, over a tape length of 200 mm. 5.1.3 Tape thickness The tape thickness shall be from 12.5 pm to 13.8 pm. 5.1.4 Offset yield strength The offset yield strength shall be g
15、reater than 15 N. 5.1.5 Magnetic coating The magnetic tape used shall have a coating of metal particles or equivalent, longitudinally oriented. The coating coercivity shall be in the range of 120,000 Nm to 140,000 Ah, with an applied field of 800000 Nrn (10000 oersted) as measured by a 50- or 60-Hz
16、BH meter or vibrating sample magnetometer (VSM). 5.2 Cassette specifications 5.2.1 Cassette dimensions Two sizes of cassettes shall be identified as follows: S cassette: 96 x 156 x 25 mrn (as shown in figures 1 to 13) L cassette: 145 x 254 x 25 mm (as shown in figures 14 to 26) 5.2.2 Tape length and
17、 recording time The maximum tape length and recording time are recommended as follows: S cassette: 241 m + 2/- O rn 40 minutes for 48 minutes for 50 minutes for 50 minutes for 29.97PsF/59.941 25PsF/501 24PsF 23.98PsF L cassette: 732 m + 2/- O m 124 minutes for 148 minutes 155 minutes 155 minutes 29.
18、97PsF/59.941 for 25PsF/501 for 24PsF for 23.98PsF 5.2.3 Datum planes Datum plane Z shall be determined by three datum areas, A, B, and C, as shown in figures 3a and 16a. Datum plane X shall be orthogonal to datum plane Z and shall include the centers of datum holes (a) and (b). Datum plane Y shall b
19、e orthogonal to both datum plane X and datum plane 2 and shall include the center of datum hole (a) as shown in figures 2 and 15. Page 3 of 62 pages SMPTE 368M-2002 5.2.4 Tape winding The-magneticcoating sidofth-magntiFtpShllface outsiaebboththesupplylandthetake-up reel as shown in figures 4 and 17.
20、 5.2.5 Label area and window area The hatched areas shown in figures 1 and 14 are for the label and window. Labels attached to the cassette shall not protrude above the outside cassette surface plane. 5.2.6 Guiding groove For correct insertion into the VTR, four guiding grooves for S cassettes, as s
21、hown in figures 1 and 2 and three guiding grooves for L cassettes as shown in figure 15, shall be provided. 5.2.7 Safety tab and safety plug for recording inhibition For S cassettes, a safety plug at the supply reel side and a hole of minimum depth 10 mm from datum plane Z at the take-up reel side s
22、hall be provided as shown in figure 2. For L cassettes, a safety plug shall be provided at the take-up reel side as shown in figure 15. The safety plug shall not be deformed by 0.3 mm or more when a force of 2.0 N (204 gf) is applied to the center of it, using a 2.5 mm diameter rod. (See figures 12
23、and 25.) 5-28 !dentificgt!Qn hn!es Six identification holes (holes 1 to 6) shall be located as specified in figures 2 and 15. For this format, holes 1, 2, 3, 4, and 6 shall be closed. Hole 5 shall be open. a 5.2.9 Reels The reels shall be automatically unlocked when the cassette is inserted into the
24、 video tape recorder andor player unit and automatically locked when the cassette is ejected from it. The locations of the reels, when in the unlocked position, are shown in figures 4 and 17. Dimensions of the reels are shown in figures 6 and 19. The height of the reels is shown in figures 7 and 20.
25、 The reel shall be completely released when the cassette lid is opened 23.5 mm minimum from datum plane Z. 5.2.9.1 Reel spring force The reels assembled in the cassette shall be pressed by the reel spring with a specified force under the conditions specified in figures 11 and 24. The spring force sh
26、all be 1.5 N * 0.5 N (153 gf f 51 gf) for S cassettes and 3.5 N i 0.5 N (357 gf * 51 gf) for L cassettes when pressing on a reel 2.4 mm above datum plane Z as shown in figures 11 and 24. 5.2.9.2 Extraction force The force (Fl, F2) required to pull the tape out from the reel shall not exceed 0.17 N (
27、17 gf), as specified in figures 13a and 26a. Page 4 of 62 pages CMPTE 3681111-2002 5.2.9.3 Friction torque The torque required to wind the tape shall be less than 15 mN m (152 gf cm) for S cassettes and less than 30 mN m (305 gf cm) for L cassettes, as specified in figures 13b and 26b. 5.2.1 O Prote
28、cting lid The cassette lid shall be automatically unlocked when the cassette is inserted into the video tape recorder and/or player unit and automatically locked when the cassette is ejected from it. The unlocking lever insertion area is specified in figures 8 and 21 The lid shall be unlocked when t
29、he lid lock lever is shifted in either direction A or B, as illustrated in figures 9 and 22. The force required to unlock the lid shall be less than 1 N (101 gf) in the A direction or less than 1.5 N (152 gf) in the B direction. The lid shall open 29.0 mm with a force of 1.5 N (152 gf) or less as sp
30、ecified in figures 10 and 23. Page 5 of 62 pages SMPTE 368M-2002 Holdin area window area 6,0.;- /T4y,=6.0.s ;:O., Label area /- po.3 Dimensions in millimeters NOTES 1 These dimensions are inspected by using limit gauges. 2 No part of the lid shall protrude beyond the bottom plane of the cassette whe
31、n the lid opens or when it closes. 3 These dimensions shall be specified based on datum plane 2. 4 Label andior window areas, shown by the hatched area, are available for the label andlor window. 5 The cassette may be held in position by the recorder andlor player unit on the holding area shown by t
32、he cross- 6 The fine hatched area shows the acceptable range of the plug notch position and depth at the side. hatched area. Figure 1 - Top and side view dimensions (S-cassette) Page 6 of 62 pages Y SMPTE 368M-2002 - sect ion 6B identification m Identification hOle.3 Identltlcatlon noie.4 Identlflca
33、tlon hoie.5- I dent I f icat ion ho le. 6 sect ion G.6 Ei Detail _.- of H _I_. Detail of E Dimensions in millimeters NOTES 1 Datum hole (a) is primary. 2 The crosshatched area shows the VTR detection area. 3 Datum holes (a) and (b) may be utilized for screw holes. Figure 2 - Bottom view dimensions (
34、S-cassette) Page 7 of 62 pages SMPTE 368M-2002 Datum area A/ - Note I I I I I 1 om. IS Datum area B Note i - ,_ r- 130- - 4 c- - 140. 420.3 Figure 3a - Datum areas and supporting areas L I 0 A I I x direction e -0 o- Y direction I Datum Diane Z Note 3 Figure 3b -Tape guides Page 8 of 62 pages Dimens
35、ions in millimeters CMPTE 368M-2002 Direction NOTES 1 The crosshatched areas 1 O mm in diameter are datum areas. 2 The four supporting areas shown by the hatched areas shall be coplanar with their corresponding datum areas within 3 Datum plane 2 shall be defined by the three datum areas, A, B, C. 4
36、Datum area D shall be coplanar, within 0.3 mm, with datum plane 2. 5 The areas within 1 mm of the edges of a cassette shall not be included in the supporting areas. 6 Measurement L: 15 mm 7 Perpendicularity of tape guides is specified as follows (even if they themselves are tapered) : 0.05 mm of eac
37、h of them. X Y I I Supply side I Oi0.15 I Of0.15 I Take-up side I Of0.15 I Of0.15 I Dimensions in millimeters Dir ction X: Parallel to the tape running direction. Direction Y: Horizontally orthogonal to direction X. Figure 3 - Datum areas, supporting areas, tape guides and associated dimensions (S-c
38、assette) Page 9 of 62 pages CMPTE 368M-2002 Dimensions in millimeters NOTES 1 The rotating direction of reels during forward operation. 2 The lid opening height L shall be 29 mm or more. 3 The reel shall be reset completely when the lid opening height L is 23.5 mm. Figure 4 - Reel location in the un
39、locked position (S-cassette) Page 10 of 62 pages I CMPTE 3681111-2002 Max. 109.5 I I MK.,30. 5 I I sect ion BB = I I NI I ATTOW View C I Datum Plane Y 7 I I :I4 I Datum Plane Z/ 1 I .-I .I I I zlEl LMax. 62. 1-1 .I; Min.78 in. 82. 5 Sect ion AA Datum Plane X Dimensions in millimeters NOTES 1 The hat
40、ched area is where the loading mechanism of the video tape recorder and/or player unit positions the video 2 The hatched and crosshatched areas are so designed that the loading mechanism of the video tape recorder andior cassette when it is inserted. player unit unwinds and extends the magnetic tape
41、 towards the head drum after the lid opens. Figure 5 - Protecting lid dimensions (S-cascette) (Sometimes referred to as minimum space for loading mechanism) Page 11 of 62 pages SMPTE 368M-2002 Dimensions in millimeters NOTE - The reels with large hubs (hub diameter 53.3 mm i 0.2 mm) can be used for
42、cassettes whose recording time is Figure 6 - Reel dimensions (C-cassette) I less than 12 minutes. I - L er., Note 4 unlocking Note 5 *I 1 view f DirectionA rri I I l I l I l l I I I I l I Arrow view D Note 1 Note 2 I I I I 9 6io. 3 (rom Datum olana X I III , I Dimensions in millimeters NOTES 1 The c
43、rosshatched and hatched areas show the allowable total area where the unlocking lever extending from the 2 The crosshatched area shows the range of the unlocking lever insertion which permits the lid to be unlocked. 3 Allowable range within which the unlocking lever can be inserted in the A directio
44、n. 4 Allowable range within which the unlocking lever can be inserted in the B direction. 5 The tip of the unlocking lever shall be shaped into a semicircle or hemisphere whose radius is half of the unlocking video tape recorder and/or player unit can be inserted into a cassette. lever width. Figure
45、 8 - Unlocking lever insertion area (S-cassette) Page 13 of 62 pages SMPTE 3681111-2002 Direction A The force to unlock the lid shall be not -pgreater_than-l .O-N-in-the-A direction.- - - Refer to figure 8 regarding the measuring (Soher Cal) Ri. 25rai ranges. ueasu;ina direction Measur in rod Direct
46、ion B The force to unlock the lid shall be less than i .5 N in the 6 direction. Refer to figure 8 regarding the measuring ranges. Measurinq direction Measuring id/ Dimensions in millimeters Figure 9 - Lid unlocking force (S-cassette) The maximum force to open the lid shall be 1.5 N. Measur ina i eve
47、r/ w irection range: 0-29lNll Dimensions in millimeters Figure 10 - Lid opening force (S-cassette) The force of the spring for pushing down the reel shall be (1.5 f 0.5) N. 3810.2 I I UMeasuring direction Dimensions in millimeters Figure 11 - Reel spring force (S-cassette) Page 14 of 62 pages SMPTE
48、368M-2002 Fit 90 I I Measuring Measuring rod4 10 7; Dime Figure 12 - Safety plug strength (S-cassette) 1 F2 90 ions in millimeters Figure 13a - Extraction force (Fl, F2) Figure 13b - Friction torque NOTES 1 Holdback torque of 1 mN m. 2 Friction torque to wind the tape. Figure 13 - Extraction force (
49、Fl, F2) and friction torque (S-cassette) Page 15 of 62 pages SMPTE 3681111-2002 -, I Min. 190.3 Max. 233. 5 Min. 237.5 - Label and/or window area Note 3 Jiizo,i,fl -(8) Max. i “7 Min. 6. I P. J-0. * 254!0: Note 1 Dimensions in millimeters NOTES 1 These dimensions are inspected by using limit gauges. 2 No part of the lid shall protrude beyond the bottom plane of the cassette when the lid opens or when it closes. 3 Label and/or window area shown by the hatched area are available for the label and/or window. 4 The cassette may be held in position by the
