1、SMPTE 22BM 96 W 357401 0002535 180 SMPTE STANDARD ANSVSMPTE 228M-1996 for Television Digital Component Recording - 19-mm Type D-1 - Time and Control Code and Cue Records 1 Scope This standard specifies the content, format, and modulation method of the longitudinal records con- tained in the cue trac
2、k and the time-code track in 19-mm type D-1 television digital component recording. Track dimensions and locations are speci- fied in ANSVSMPTE 224M. The document applies to recorders operating in the 525-line television sys- tem with a frame frequency of 29.97 Hz. 2 Normative references The followi
3、ng standards contain provisions 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 poss
4、ibility of applying the most recent edition of the standards indicated below. ANSVSMPTE 125M-1995, Television - Component Video Signal 4:2:2 - Bit-Parallel Digital Interface ANSVSMPTE 224M-1996, Television Digital Compo- nent Recording - 19-mm Type D-1 - Tape Record Page 1 of 2 pages 3 Cue record 3.
5、1 Method of recording The signals shall be recorded using the anhysteresis (AC bias) method. 3.2 Flux level The recorded standard operating audio level shall correspond to an rms magnetic short-circuit flux level of 70 nWb/m 1 O nWb/m of track width at 1 O00 Hz. 3.3 Recorded flux characteristics Whe
6、n a tape record is recorded from a constant voltage level applied to the input terminals of the recording system, the short-circuit tape flux level on the record versus frequency shall remain constant. 3.4 Relative timing Cue information shall be recorded on the tape at a point referenced to the ass
7、ociated video information as defined by dimension P of ANSVSMPTE 224M (cue audio may be up to 1 O0 TV lines early). The users attention is called to the possibility that compliance with this standard may require use of an invention covered by patent rights. By publication of this standard, no positi
8、on is taken with respect to the validity of this claim or of any patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain suc
9、h a license. Details may be obtained from the publisher. No representation or warranty is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. CAUTION NOTICE: This Standard may be revised or withdrawn at any time. The procedures of the
10、 Standard Developer require that action be taken to reaffirm, revise. or withdraw this standard no later than five years from the date of publication. Purchasers of standards may receive curreni information on ali standards by calling or writing the Standard Developer. Printed in USA. CopyrightO199b
11、yTHESOCIETYOF L American Malional Siandard MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 1 Om7 (914) 761-11W Approved August 14,1996 ANSVSMPTE 228M-1996 4 Time and control code record 4.4 Channel code 4.1 Code The longitudinal time and control code specified in ANSV
12、SMPTE 12M shall be used. Time and control code data shall employ bi-phase mark coding. 4.5 Bit zero The location of bit zero of the time code on tape shall be a distance, P (see ANSI/SMPTE 224M), ahead of the upper video sector of field 1 of the associated video data, as defined in ANSI/SMPTE 1234.
13、4.2 Method of recording The signais shall be recorded Using the anhysteresis (AC bias) recording method. 4.3 Flux level The recorded peak flux shall correspond to an rms magnetic short-circuit flux level of 185 nWb/m I20 nWb/m of track width. Annex A (informative) Bibliography ANSI/SMPTE 12M-1995, T
14、elevision, Audio and Film -Time SMPTE EG 1 O, Tape Transport Geometry Parameters and Control Code for 19-mm Type D-1 Television Digital Component Recording ANSIISMPTE 225M-1996 Television Digital Component Recording - 19-mm Type D-1 - Magnetic Tape SMPTE EG *, -1993, Nomenclature for Television Digital Recording of 19-mrn Type D-1 Component and Type D-2 Composite Formats SMPTE 226M, Television Digital Recording - 19-mm Tape Cassettes ANSIISMPTE 227M-1996, Television Digital Component Recording - 19-mm Type 0-1 - Helical Data and Control Records Page 2 of 2 pages
