SMPTE RP 140-2005 Position of Photographic Audio Record for Routine Test Signals《常规试验信号用摄影音频的记录位置》.pdf

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1、 1 Scope This practice reserves the section of the audio record available for routine audio tests on negative photographic audio records. The position specified is for audio records in the editorial or parallel sync position before the record has been advanced. 2 Normative references The following s

2、tandards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this practice are encouraged to investigate the possibil

3、ity of applying the most recent edition of the standards indicated below. SMPTE 55-2000, Motion-Picture Film 35- and 16-mm Television Release Prints Leaders and Cue Marks SMPTE 301-1999, Motion-Picture Film Theater Projection Leader, Trailer and Cue Marks 3 Audio record test area The sync pop synchr

4、onizes with the 2“ frame of the SMPTE Universal Leader (SMPTE 55) or the “3” frame of the SMPTE Projection Leader (SMPTE 301). In both instances, this frame is 48 frames ahead of the first frame of program. Following the pop, there shall be two unmodulated frames. The next 14 frames of the audio rec

5、ord negative are reserved for routine audio tests. These tests may include a cross-modulation test, a sequence of tones, or unmodulated record for making base density readings. When this area is used on a negative, the test is not to be removed when preparing the negative for printing. (Thirty-one u

6、nmodulated frames will still remain following the test signal frames and before the start of program audio.) RP 140-2005 Revision of RP 140-1995 Copyright 2005 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved December 16, 2005 SMPTE RECOMMENDED PRACTICE Position of Photographic Audio Record for Routine Test Signals