1、SMPTE RECOMMENDED PRACTICE RP 97-2002 Revision of RP 97-1997 Specifications for Flutter Test Film for 35-mm Audio Reproducers, Photographic Type This practice specifies a test film for determining the presence of flutter in 35-mm motion-picture photographic audio reproducers operating at 90 ft (27.4
2、 m) per minute. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions in this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on th
3、is standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. AES 6-1982, Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment ANSVSMPTE 139-1 996, Motion-Picture Film (35-mm) - Perforated KS SM
4、PTE 40-2002, Motion-Picture Film (35-mm) - Photographic Audio Records - Release Prints SMPTE 223M-2001, Motion-Picture Film -Safety Film 3 Test film signal 3.1 Frequency The audio record on the film shall reproduce at a frequency of 3150 Hz k 25 Hz when the linear velocity of the film is 96 perforat
5、ions per second or approximately 90 t per minute (18 in or 45.7 cm per second). 3.2 Location and dimensions The location and dimensions of the recorded audio record shall be in accordance with SMPTE 40. P 3.3 Recording The test film shall have an originally-recorded, variable-area audio track. The m
6、odulation of the recording shall be (80 k5)%. The output level of the film shall be constant within f 1 dB. 3.4 Flutter The weighted peak flutter of the audio record shall not exceed k 0.05% when measured in accordance with AES 6. Copyright O 2002 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGI
7、NEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved July 26,2002 RP 97-2002 3.5 Azimuth The azimuth of the audio record shall be 90“ ?I 5 to the reference edge of the film. 4 Filmstock The film stock, preferably polyester, shall be splice-free safety type in compliance with S
8、MPTE 223M, and cut and perforated in accordance with long-pitch dimensions specified in ANSVSMPTE 139. 5 Identification Each test film shall be identified by a suitable identification marking. The marking shall be printed lengthwise in the picture area and the spacing between consecutive titles shall be approximately 12 in (305 mm). NOTE- Atest film conforming to this practice is available from the Society of Motion Picture and Television Engineers. Page 2 of 2 pages
