1、 1 Scope This practice recommends the allocation of stereo audio tracks on quadruplex television tape recorders employing a split audio head, 1-in types B and C, 3/4-in type E, and 1/2-in types H, L, and M, for the exchange of stereo program material between television organizations. It also recomme
2、nds an identification procedure if noise reduction is employed, and identification and marking of the tape reel or cassette and the associated box. 2 Track allocation For stereo audio on television program material, track 1 shall carry the discrete left (L) signal and track 2 shall carry the right (
3、R) signal. The terms “left“ and “right“ shall relate to the viewers perspective. 3 Noise reduction Unless explicitly provided for by the applicable format documentation, noise reduction shall only be employed by prior arrangement of the persons exchanging program material. 4 Labels The tape reel or
4、cassette and the associated box shall be marked with an indication that the program material is recorded in stereo. If noise reduction is employed, the tape reel or cassette and the associated box shall be marked to identify its use, type, and reference fluxivity. Annex A (informative) Bibliography
5、Type B: SMPTE 16M-1998, Television Analog Recording 1-in Type B Helical Scan Records SMPTE 17M-1998, Television Analog Recording 1-in Type B Helical Scan Frequency Response and Operating Level Type C: SMPTE 19M-2003, Television Analog Recording 1-in Type C Records SMPTE 20M-2003, Television Analog R
6、ecording 1-in Type C Recorders and Reproducers Longitudinal Audio Characteristics Page 1 of 2 pages RP 142-2004 Revision of RP 142-1997 Copyright 2004 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved November 30, 2004 SMP
7、TE RECOMMENDED PRACTICE Stereo Audio Track Allocations and Identification of Noise Reduction for Video Tape Recording RP 142-2004 Page 2 of 2 pages Type E: ANSI/SMPTE 21M-1997, Video Recording 3/4-in Type E Helical-Scan Records Type H: SMPTE 32M-1998, Video Recording 1/2-in Type H - Cassette, Tape a
8、nd Records Type L: ANSI/SMPTE 229M-1996, Television Analog Recording 1/2-in Type L Records ANSI/SMPTE 230M-1996, Television Analog Recording 1/2-in Type L Electrical Parameters, Control Code and Tracking Control 2-inch: SMPTE 6-1998, Video Recording 2-in Quadruplex Tape Video, Audio and Tracking-Control Records
