1、 - STD-SMPTE EG 22-ENGL 1997 E 8357403 0002874 b73 m SMPTE ENGINEERING GUIDELINE EG 22-1997 Revision of EG 22-1993 DescriPtion and Index of Documents for 19:mm Type D-2 Composite Television Digital Recording I Scope This guideline contains the index for the referenced documents describing the 19-mm
2、type D-2 composite television recording format. 2 General description This format uses 19-mm class 1500 tape as described in ANSIISMPTE 246M. The tape is contained in one of three sizes of cassette as defined in ANSIISMPTE 226M. The physical layout of tracks on tape is defined in ANSIISMPTE 245M. Th
3、e content of the helical record which contain video and audio data, and of the longitudinal control track record is defined in ANSIISMPTE 247M. The content of the longitudinal cue track record and of the longitudinal time and control code record is defined in ANSIISMPTE 248M. SMPTE EG 20 presents tw
4、o examples of a mechani- cal design for a scanner which could record a helical track as defined in ANSIISMPTE 245M. 3 Index to documents Subject Page SMPTE EG 21 - Nomenclature 1 Scope . . . . . . . . . . . . . . . . . 1 2 General definitions . . . . . . . . . . 1 3 Track pattern allocation - Videoa
5、ndaudiosegments . . . . . 1 4 Electrical signal allocation . . . . . . . I 5 Subsets of binary data . . . . . . . . . 2 6 Error protection strategy . . . . . . . . 3 7 Error protection - Data organization . 3 Page 1 of 4 pages Subject Page 8 Coding and modulation . . . . . . . 4 9 Mechanical terms .
6、 . . . . . . . . . 4 10 Editing definitions . . . . . . . . . . 5 ANSIISMPTE 245M -Tape record 1 1 2 General specifications. . . . . . . . . 1 3 Tape speed . . . . . . . . . . . . . 1 4 Record location and dimensions . . . 1 5 Helical track record curvature . . . . 4 6 Relative positions of recorded
7、 signals . 5 7 Gapazimuth . . . . . . . . . . . . . 5 Annex A - Cross-tape track measurement technique. . . . . . . . . . . . . . 6 Scope , . . . . . . . . . . . . . . . ANSIISMPTE 247M - Helical data and control records 1 2 3 3.1 3.2 3.3 3.3.1 3.3.2 3.3.3 3.4 3.4.1 3.4.2 3.4.3 3.5 3.6 Scope . . . .
8、 . , . . , . . . . . . . I Normative references . . . . . . . . 1 Helical record content . . . . . . . . 1 Introduction . . . . . . . . . . . . . 1 Labeling conventions for audio and video data . , . . , . . . . . 1 Sync block . . . . . . . . . . . . . . 2 Sync pattern . . . . . . . . . . . . . 3 Id
9、entification pattern . . . . . . . . . 3 Sync block data fieldierror correction coding . . . . . . . . . 4 Preamble . . . . . . . . . . . . . . 5 Track preamble for start of field track pair . . . . . . . . . . 5 Track preamble . . . . . . . . . . . 6 In-track preamble . . . . . . . . . . 6 Postambl
10、e. , . , . . . . . . . . . . 6 Editgaps . . . . . . . . . . . . . . 7 Copyright O 1997 by the SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains. NY 10607 (914) 761-1100 Approved September 18, 1997 STD-SMPTE EG 22-ENGL 1997 ei 8357401 0002875 50T = EG 22-1997 Subj
11、ect Page Subject Page 3.7 Channel code . 7 SMPTE EG 20 . Tape transport and geometry para meters 3.8 Magnetization . 7 3.9 Video processing . 7 . . 1 Scope 1 3.9.1 Sampling 7 3.9.2 Recorded data 7 3.9.2.1 Recorded samples of the television line . 7 . 2 General specifications 1 3 Scanner specificatio
12、ns 1 3.9.2.2 Recorded lines of the 3.9.3 Channel distribution of samples . . 8 television frame 7 ANSVSMPTE 246M - Magnetic tape 3.9.4 3.9.4.1 3.9.4.2 3.9.5 3.9.6 3.10 3.10.1 3.10.2 3.10.3 3.10.3.1 3.10.3.2 3.10.3.3 Data shuffling . 8 Introduction 8 Algebraic definition 9 Sector array 9 Outer error
13、protection . 1 O Audio processing . 1 O Introduction 1 O Source coding . 1 O Source processing 11 Introduction 11 Relative audio-video timing 11 Segment 12 1 2 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Scope 1 Measurement environment 1 Television tape specifications 1 Base . 1 Width . 1 Delta width 1 Refere
14、nce edge straightness 1 Tape thickness 1 Transmissivity 1 Offset yield strength . 2 Magnetic coating . 2 3.10.3.4 Audio data word processing 13 3.10.4 Auxiliary words 14 ANSI/SMPTE 244M - Encoding of video signals 3.10.4.1 Channel use (CHAN) -4 bits . . 14 (system NTSC) 3.10.4.2 Preemphasis (PREF) -
15、4 bits . . 14 3.10.4.3 3.10.4.4 3.10.4.5 3.10.4.6 3.10.5 3.10.6 3.10.7 3.10.8 4 Audio data word mode (LNGH) -4 bits 15 Block sync location S MARK O. SMARK1 . 15 Word count (BCNT) -4 bits . 15 Edit flag (EFLG) 16 Inner protection and channel coding . 17 Order of transmission to inner coding 17 Relati
16、ve audio-video recording Control track 17 Outer error protection . 16 arrangement 17 ANSVSMPTE 248M -Cue record and time and control code record 1 Scope I 2 Normative references I 4 Tape speed . 2 5 Cue record 2 6 Timeandcontrolcode record 2 3 General specifications 1 4.1 4.2 4.3 5 5.1 5.2 5.3 5.4 5
17、.5 6 6.1 6.2 6.3 6.4 7 7.1 7.2 7.3 Scope 1 Normative references 1 General specifications 1 Sampling structure and quantization specifications . 2 Sampling structure . 2 Quantization specifications . 2 Coding parameters 6 Digital raster structure 6 Digital active field 6 Digital active line . 6 gener
18、ated NTSC . 7 Digital vertical blanking interval . 7 Digital horizontal blanking interval . . 11 Electrical characteristics . 11 Signal conventions 11 Transmitter characteristics 11 Receiver characteristics . 11 Clock signal . 14 Mechanical characteristics 14 General . 14 Interconnecting cable 14 Co
19、nnectors 15 Analog blanking for digitally Page 2 of 4 pages STD.SMPTE EL 22-ENGL 3977 8357403 000287b 44b A EG 22-1 997 List of Ilustrations Figure Description Page Figure Description Page ANSIISMPTE 245M 1 Location and dimensions of recorded tracks . . . . . . . . . . . . 2 2(a) Location of control
20、 track record . . . . . 3 2(b) Location of cueltime code record . . . . 3 3 Location and dimensions of tolerance zones of helical track record . . . . . 5 technique . . . . . . . . . . . . . 6 Annex A - Cross-tape track measurement ANSIISMPTE 247M 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Block diag
21、ram - Record . . . . . . . . 2 Blockdiagram-Reproduce . . . . . . 2 Sector arrangement on helical track . . . 3 Sync block format . . . . . . . . . . . 3 Sync block identification format . . . . 4 Sync block ID number . . . . . . . . . 4 Track, segment and field numbers . . . 5 Sector preamble and p
22、ostamble . . . . 6 Horizontal sync relationship . . . . . . 8 Channel distribution of samples . . . . 8 Video sector array . . . . . . . . . . I O Audio data block layout . . . . . . . . 11 Relative audio-video timing . . . . . . 12 Allocation of audio words to bytes . . 13 Audio data block auxiliar
23、y data . . . . 14 Audio edit (channelA2 only) . . . . . 16 Control waveform-timing . . . . . . . 18 SMPTE EG 20 I Scanner configuration for design 1 . . 2 Scanner configuration for design 2 . . 3 Longitudinal head locations and tape wrap for design 1 . . . . . . . 4 Longitudinal head locations and t
24、ape wrap for design 2 . . . . . . . ANSIISMPTE 244M 1 Vertical blanking interval stucture . . 2 Derivation of sample sequence . . . 3 4 5 6 7H 8 9 10 11 3 3 4 5 3 4 Sample numbering for horizontal line Derivation of the sample zero period of nominal NTSC signal . . . 4 sampling phase for line 10, fi
25、eld I, color frame A . . . . . . , . . . . . 5 Relationship between analog signal levels (IRE units) and digital sample values . 6 Relationship between the analog and digital rasters . . . . . . . . . . . . 7 Location and magnitude of 1 O-bit samples during digital vertical blanking interval of fiel
26、ds I and III . . . . . . . . . . . 9 Location and magnitude of IO-bit samples during digital vertical blanking interval of fields II and IV . . . . . . . . . . . 10 Location and magnitude of 1 O-bit samples during digital horizontal blanking interval 13 Balanced interface circuit . . . . . . . . 14
27、Digital interface clock waveform . . , . 14 Cableconnectorconfiguration . . . . . 15 Page 3 of 4 pages EG 22-1 997 List of Tables Table Description Page Table Description Page ANSVSMPTE 245M ANSVSMPTE 244M I Signal quantization . 2 2 Permitted and protected values 2 Summary of coding parameters 6 1
28、Record location and dimensions . 4 3 4 10- and 8-bit hexadecimal values SMPTE EG 20 for the digital vertical blanking interval 8 1 O- and 8-bit hexadecimal values 1 Pole tip relationships . 2 2 Scannerdesign parameters . 2 5 ANSISMPTE 247M for the digital horizontal blanking interval . 12 6 Connecto
29、rcontact assignments . 16 1 Status data (byte O) 12 2 Status data (byte 1) 12 3 Audio data word mode 13 Annex A (informative) Bibliography ANSI S4.40-1992, Digital Audio Engineering - Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data (AES-3) ANSIISMPTE 226M-1996, Tel
30、evision Digital Recording - 19-mm Tape Cassettes ANSIISMPTE 244M-1995, Television - System MINTSC Composite Video Signals - Bit-Parallel Digital Interface ANSIISMPTE 245M-1993, Television Digital Recording - 19-mm Type D-2 Composite Format - Tape Record ANSIISMPTE 246M-1993, Television Digital Recor
31、ding - 19-mm Type D-2 Composite Format - Magnetic Tape ANSVSMPTE 247M-1993, Television Digital Recording - 19-mm Type D-2 Composite Format - Helical Data and Control Records ANSI/SMPTE 248M-1993, Television Digital Recording - 19-rnrn Type D-2 Composite Format - Cue Record and Time and Control Code
32、Record SMPTE EG 20-1997, Tape Transport Geometry Parameters for 19-mm Type D-2 Composite Format for Television Digital Recording SMPTE EG 21-1 997, Nomenclature for Television Digital Recording of 19-mm Type D-1 Component and Type D-2 Composite Formats ITU-R BT.470-4, Television Systems Page 4 of 4 pages
