1、 Table of contents 1 Scope 2 Normative reference 3 Environment and test conditions 4 Video tape 5 Helical recordings 6 Program track data 7 Video interface 8 Audio data interface 9 Compressed video data processing 10 Audio processing 11 Longitudinal track Annex A Tape tension Annex B Cross-tape trac
2、k measurement technique Annex C Track pattern during insert editing Annex D Video interface Annex E Reference and Calibration tape Annex F Tape cassette Annex G Abbreviations Annex H Bibliography 1 Scope This standard specifies the content, format, and recording method of the data blocks containing
3、compressed video data, AES3 audio data, and associated data which form the helical records on 12.65-mm (0.5-in) tape. In addition, this standard specifies the content, format, and recording method of the longitudinal record containing tracking information for the scanning head associated with the he
4、lical records, and also the longitudinal cue audio, and time and control code. One video channel of high definition compressed video data and eight independent AES3 audio data channels are recorded in the digital format. Each of these channels is designed to be capable of independent editing. The HD
5、 video compressed data are derived from the following HD video signals: 1080 line / 59.94 Hz field frequency interlace system (1080/59.94i) 720 line / 59.94 Hz frame frequency progressive system (720/59.94p) 1080 line / 50 Hz field frequency interlace system (1080/50i) 1080 line / 25 Hz frame freque
6、ncy progressive system (1080/25p) 1080 line / 24 Hz frame frequency progressive system (1080/24p) 1080 line / 23.98 Hz frame frequency progressive system (1080/23.98p) Page 1 of 74 pages SMPTE 399M-2004 Copyright 2004 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., W
7、hite Plains, NY 10607 (914) 761-1100 ApprovedFebruary 3, 2004SMPTE STANDARD for Digital Television Recording 1/2-in Type D-15 High-Definition Compressed Video Data Format SMPTE 399M-2004 Page 2 of 74 pages Through out the text of this standard, the expression “AES3 audio data” may be abbreviated to
8、“audio data” and represents digitized audio and data in AES-3 format. The tape format also supports a recording of AES-3 data payload streams with some limitation (see 6.3.3 d). Figures 1 and 2 show block diagrams of typical recording and playback circuits. The compression part in the dotted line re
9、ctangle in figure 1 refers to SMPTE 342M. Figure 1 Record block diagram Analogue/digitalinterfaceIntra-fieldshuffleBlockshuffleAudio(Analogue)(Digital AES3)VideoOuterECCencoderHD videoHelicaltrackRecorddriverand headChannelcoderInnerECCencoderDataMUXSync/ID gen.Control trackinformationControl trackg
10、en.Time andcontrolcodeExtT.C. Time codegen.Cue(Analogue)Rec. ampRecorddriversand headsChannelDEMUXswitchOuterECCencoderIntra-fieldshuffleCompressionSMPTE 399M-2004 Page 3 of 74 pages Figure 2 Playback block diagram (including decompression) 2 Normative references The following standards contain prov
11、isions, 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 mo
12、st recent edition of the standards indicated below. ANSI/SMPTE 299M-1997 24-Bit Digital Audio Format of HDTV Bit-Serial Interface SMPTE 12M-1999, Television, Audio and Film Time and Control Code SMPTE 342M-2004, Television HD-D5 Compressed Video 1080i and 720p Systems Encoding Process and Data Forma
13、t SMPTE RP 155-1997, Audio levels for Digital Audio Records on Digital Television Tape Recorders AES3-1992 (R1997), Serial Transmission Format for two Channel Linearly Represented Digital Audio Data 3 Environment and test conditions 3.1 Environment Tests and measurements made on the system to check
14、the requirements of this standard shall be carried out under the following conditions: Audio(Analogue)Digital/analogueinterfaceIntra-fielddeshuffle(Digital AES3)AudioerrorconcealOuterECCdecoderBlockdeshuffleVideoVideoerrorconcealHelicaltrackPlaybackheadpre ampand eq.Control trackinformationControl t
15、rackP.B.Time andcontrol codeT.C.Time codereaderCue(Analogue)P.B. ampHeads andplaybackinterfaceSyncdetecChanneldecoderInnerECCdecoderDataDEMUXIntra-fielddeshuffleChannelMUXswitchOuterECCdecoderHD videoCompressionDe-SMPTE 399M-2004 Page 4 of 74 pages Temperature 20 C 1 C Relative humidity (50 2) % Bar
16、ometric pressure from 86 kPa to 106 kPa Tape conditioning not less than 24 h Center tape tension 0.31 N 0.05 N (see annex A) 4 Magnetic tape 4.1 Base The base material shall be polyester or equivalent. 4.2 Width The tape width shall be 12.650 mm 0.008 mm. The tape, covered with glass, is measured wi
17、thout tension at a minimum of five different positions along the tape using a calibrated comparator having an accuracy of 0.001 mm (1 m). The tape width is defined as the average of the five readings. 4.3 Width fluctuation Tape width fluctuation shall not exceed 5 m peak to peak. Measurement of tape
18、 width fluctuation shall be taken over a tape length of 900 mm. The value of tape width fluctuation shall be evaluated by measuring the tape width at 10 points, each separated by a distance of 100 mm. 4.4 Tape thickness Two types of tape thickness shall be permitted by this standard. The first tape
19、thickness shall be 10.2 m to 11.0 m (referred to as 11 m); the second tape thickness shall be 13.0 m to 14.0 m (referred to as 14 m). 4.5 Transmissivity Transmissivity shall be less than 5%, measured over the range of wavelengths 800 nm to 900 nm. 4.6 Offset yield strength The offset yield strength
20、shall be greater than 9 N for 11-m tape and 10 N for 14-m tape. The force required to produce 0.2 % elongation of a 1000 mm test sample with a pull rate of a 10 mm per minute shall be used to confirm the offset yield strength. The line beginning at 0.2 % elongation parallel to the initial tangential
21、 slope is drawn and then read at the point of intersection of the line and the stress-strain curve. 4.7 Magnetic coating The magnetic layer of the tape shall consist of a coating of metal particles or equivalent. 4.8 Coating coercivity The coating coercivity shall be a class 1800 (144000 A/m) with a
22、n applied field of 400000 A/m (5000 Oe) as measured by a 50-Hz or 60-Hz B-H meter or vibrating sample magnetometer (VSM). 4.9 Particle orientation The metal particles shall be longitudinally oriented. SMPTE 399M-2004 Page 5 of 74 pages 5 Helical recordings 5.1 Tape speed The tape speed shall be 167.
23、228 mm/s for the 1080/59.94i and 720/59.94p systems, 139.496 mm/s for the 1080/50i and 1080/25p system, 133.782 mm/s for the 1080/24p and 1080/23.98p system respectively. The tolerance shall be 0.2 %. 5.2 Record location and dimensions 5.2.1 The format requires full track width erasure for continuou
24、s recording and flying erasure for insert editing. 5.2.2 Record location and dimensions for continuous recording shall be as specified in figures 3 and 4 and table 1. In recording, sector locations on each helical track shall be contained within the tolerances specified in figure 3 and table 1. 5.2.
25、3 The reference edge of the tape for record location dimensions specified in this standard shall be the lower edge as shown in figure 3. The magnetic coating, with the direction of tape travel as shown in figure 3, is on the side facing the observer (measuring techniques are shown in annex B). 5.2.4
26、 As indicated in figure 3, this standard anticipates a zero guard band between recorded tracks, and the record head width should be equivalent to the track pitch of 20 m. The scanner head configuration should be chosen such that the recorded track widths are contained within the limits of 18 m to 22
27、 m. 5.2.5 In insert editing, this standard provides a guard band of 2 m (nominal) between the previously recorded track and the inserted track at editing points only. A typical track pattern for insert editing is shown in figure C.1 of annex C. SMPTE 399M-2004 Page 6 of 74 pages NOTES 1 A1 to A8 are
28、 audio data sectors. 2 V0 and V1 are compressed video data sectors. 3 Tape viewed from magnetic coating side. 4 Dimensions X1 to X10 are determined by the program reference point as defined in figure 4. Figure 3 Location and dimensions* of recorded tracks (*See table 1) Detail Aa0a1a1a0Reference edg
29、eTime and Control Code TrackControl TrackCue TrackDirection of tape travelDirection ofheadmotionX1X2X3X4X5X6K0V0A1A2V1K1MDetail ALIYAB CDEFGHWMMMMMMMARASATAUAVAWXXXWXVXPOP1P2Time Code Start BitVideo FramePulseSMPTE 399M-2004 Page 7 of 74 pages Figure 4 Location of cue and time and control code track
30、 records SERVO REFERENCE PULSE RECORDING-CURRENT WAVEFORM S N N S DETAIL A RECORDING-CURRENT WAVEFORM DETAIL B PROGRAM REFERENCE POINT COMPRESSED VIDEO SECTOR PREAMBLE CONTROL TRACK TIME AND CONTROL CODE TRACK REFERENCE EDGE Y (BASIC) X1 DETAIL C DETAIL A TAPE TRAVEL CONTROL TRACK CUE TRACK TIME AND
31、 CONTROL CODE TRACK HEAD MOTION DETAIL B P1 P2 PROGRAM REFERENCE POINT X1 LOCATION OF COMPRESSED VIDEO START Y DETAIL C SMPTE 399M-2004 Page 8 of 74 pages Table 1 Record location and dimensions Dimensions 59.94i 50i 25p 23.98p 24p Tolerance A B C D E F G H I K0 K1 L M P1 P2 X1 X2 X3 X4 X5 X6 X7 X8 X
32、9 X10 Y Time and control code track lower edge Time and control code track upper edge Control track lower edge Control track upper edge Program area lower edge Program area width Cue audio track lower edge Cue audio track upper edge Helical track pitch Compressed video data sector 0 length Compresse
33、d video data sector 1 length Helical track total length Audio data sector length Control track reference pulse to program reference point (see figure 4) Cue/time and control code signal, start of code word, to program reference point (see figure 4) Location of start of compressed video data sector V
34、0 Location of start of audio data sector A1 Location of start of audio data sector A2 Location of start of audio data sector A3 Location of start of audio data sector A4 Location of start of audio data sector A5 Location of start of audio data sector A6 Location of start of audio data sector A7 Loca
35、tion of start of audio data sector A8 Location of start of compressed video data sector V1 Program reference point 0 0.450 0.900 1.300 1.629 10.020 11.950 12.550 0.0200 51.624 51.562 116.397 1.273 180.556 183.407 0 51.898 53.507 55.117 56.726 58.335 59.944 61.554 63.163 64.772 1.639 0 0.450 0.900 1.
36、300 1.624 10.030 11.950 12.550 0.0200 51.676 51.614 116.514 1.275 180.614 183.465 0 51.950 53.561 55.172 56.783 58.394 60.005 61.616 63.227 64.837 1.634 Basic 0.050 0.050 0.050 Derived Derived 0.050 0.050 Ref Derived Derived Derived Derived 0.050 0.100 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050
37、 0.050 0.050 Basic a0 a1 Track angle Azimuth angle (track 0) Azimuth angle (track 1) 4.9384 - 20.038 19.962 4.9384 - 20.038 19.962 Basic 0.150 0.150 NOTES 1 Measurements shall be made under the conditions specified in 3.1. The measurements shall be corrected to account for actual tape speed (see fig
38、ures B.1 and B.2 of Annex B). 2 All dimensions in millimeters. 5.3 Helical track record tolerance zones The lower edges of any eight consecutive tracks starting at the first track in each compressed video data frame shall be contained within the pattern of the eight tolerance zones established in fi
39、gure 5. Each zone is defined by two parallel lines, which are inclined with respect to the tape reference edge at an angle of 4.9384 (basic). The centerlines of all zones shall be spaced apart 0.0200 mm (basic). The width of zones 1 to 3 and 5 to 8 shall be 0.006 mm (basic). The width of zone 4 shal
40、l be 0.004 mm (basic). These zones are established to contain track angle errors, track straightness errors, and vertical head offset tolerance (measuring technique is shown in annex B). SMPTE 399M-2004 Page 9 of 74 pages NOTES 1 Tolerance zone centerlines. 2 4.9384 3 All dimensions in millimeters.
41、Figure 5 Location and dimensions of tolerance zones of helical track record 5.4 Relative positions of recorded information 5.4.1 Relative positions of longitudinal tracks Audio data, compressed video data, control track, time and control code, and cue track with information intended to be time coinc
42、ident shall be positioned as shown in figures 3 and 4. 5.4.2 Program area reference point The program area reference point is determined by the intersection of a line parallel to the reference edge of the tape at a distance Y from the reference edge and the centerline of the first track in each comp
43、ressed video data field (segment 0, track 0) (see figures 3 and 4 and 6.1). The end of the preamble and start of the compressed video data sector are located at the program area reference point, and the tolerance is dimension X1. The locations are shown in figures 3 and 4; dimensions X1 and Y are in
44、 table 1. The relationship between sectors and contents of each sector is specified in clause 6. TRACK LOWER EDGESTAPE REFERENCE EDGE0.006 0.006 0.006 0.004 0.006 0.006 0.006 0.006NOTE 2ZONE1ZONE2ZONE3ZONE4ZONE5ZONE6ZONE7ZONE8HEADMOTIONTAPE TRAVELNOTE 1NOTE 1NOTE 1NOTE 1NOTE 1NOTE 1NOTE 1NOTE 10.020
45、 0.020 0.020 0.020 0.020 0.020 0.020SMPTE 399M-2004 Page 10 of 74 pages 5.5 Gap azimuth 5.5.1 Cue track, control track, time code track The azimuth angle of the cue, control track, and time and control code head gaps used to produce longitudinal track records shall be perpendicular to the track reco
46、rd. 5.5.2 Helical track The azimuth of the head gaps used for the helical track shall be inclined at angles a0and a1as specified in table 1, with respect to a line perpendicular to the helical track. The azimuth of the first track of every field (segment 0, track 0) shall be oriented in the counterc
47、lockwise direction with respect to a line perpendicular to the helical track direction when viewed from the side of tape containing the magnetic record. 5.6 Transport and scanner (informative) The effective drum diameter, tape tension, helix angle, and tape speed taken together determine the track a
48、ngle. Different methods of design and/or variations in drum diameter and tape tension can produce equivalent recordings for interchange purposes. One possible configuration of the transport uses a scanner with an effective diameter of 76.000 mm. Scanner rotation is in the same direction as tape moti
49、on during normal playback mode. Data is recorded by two groups of four heads mounted 180 apart. Figure 6 shows one possible mechanical configuration of the scanner, and table 2 shows the corresponding mechanical parameters. Figures 7 and 8 shows the relationship between the longitudinal heads and the scanner. Other mechanical configurations are allowable provided the same footprint of recorded information is produced on tape. Erase heads are illu
