title>Head gaps and sound records for three-,four-,or six-track magnetic sound records on 35mm motion-picture film containing no picture-Positions and width dimensions - GB/T 4637-1994 - Chinese standardNet - bzxz.net
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Head gaps and sound records for three-,four-,or six-track magnetic sound records on 35mm motion-picture film containing no picture-Positions and width dimensions
Basic Information
Standard ID:
GB/T 4637-1994
Standard Name:Head gaps and sound records for three-,four-,or six-track magnetic sound records on 35mm motion-picture film containing no picture-Positions and width dimensions
This standard specifies the position and width of the gap between the recording head and the sound reproduction head for three-track, four-track and six-track on 35mm magnetic discs, and also specifies the head azimuth, the running direction of the magnetic disc and the direction of the magnetic coating. This standard applies to the recording and sound reproduction of three-track, four-track and six-track on 35mm magnetic discs for movies. GB/T 4637-1994 Position and width of the gap between the recording head and the sound reproduction head for three-track, four-track and six-track on 35mm magnetic discs GB/T4637-1994 Standard download decompression password: www.bzxz.net
This standard specifies the position and width of the gap between the recording head and the sound reproduction head for three-track, four-track and six-track on 35mm magnetic discs, and also specifies the head azimuth, the running direction of the magnetic disc and the direction of the magnetic coating. This standard applies to the recording and sound reproduction of three-track, four-track and six-track on 35mm magnetic discs for movies.
Some standard content:
National Standard of the People's Republic of China Head gaps and sound records for three-tfour-,or six-track magnetic sound recordson 35 mn motlon-plcture film contuiningno picture--Positlons and width dimensionsGB/T 4637--94 GB4637\u201484 Replaces G3 5876--86 GB 5877 --26 This standard is equivalent to the international standard IS0162\u20141985Head gaps and sound records for three-tfour-,or six-track magnetic sound recordson 35 mm motlon-plcture film contuiningno picture--Positlons and width dimensionsGB/T 4637--94 GB4637\u201484 Replaces G3 5876--86 GB 5877 --26 This standard is equivalent to the international standard IS0162\u20141985Head gaps and sound records for three-tfour-,or six-track magnetic sound recordson 17.5 mm motlon-plcture film contuiningno picture--Positlons and width dimensions 1 Subject content and scope of application This standard specifies the position and width of the gaps of the recording heads and playback heads on 35mm magnetic films with three tracks, four tracks and six tracks, and also specifies the head azimuth, the running direction of the magnetic film and the direction of the magnetic coating. This standard applies to the recording and playback of three tracks, four tracks and six tracks on 35mm magnetic films dedicated to movies. 2 Terminology Magnetic film Special magnetic sound carrier made according to the geometric dimensions and perforation specifications of movie films. 3 Direction of magnetic coating The running direction of the magnetic film is shown in Figures 1 to 3, with the magnetic coating facing upward. 4: Head azimuth The angle between the center line of the gap of the recording or playback head and the running direction of the magnetic film should be 90\u00b0\u00b13\u00b0, and the center line of the gap of the multi-channel magnetic head must be calibrated on the straight line. 5 Position and width of the head gap The position and width of the gap between the recording head and the playback head are shown in Figures 1 to 3 and Tables 1 to 3. 6 Track usage 6.1 Mono recording - usually uses the first track of the three tracks for recording (as shown in Figure 1 and Table 1). 6.2 The usage of stereo recording tracks is as follows, approved by the National Technical Supervision Bureau on December 28, 1994 and implemented on August 1, 1995 On channel Left channel GB/T4637-94 Three-channel format Middle channel Four-channel format Middle channel Right channel Right channel (ambient channel) Note: For two-way stereo with phase-related materials, two adjacent tracks should be used for recording (preferably three-track format 3 Table 1 Three-track magnetic gap and track size (as shown in Figure 1) Size H (reference) 5. 0\u00b1 0. 05 8. 6\u00b10. 05 8. 9\u00b10, 05 17. 8\u00b10. 06 34.97 +line Magnetic transport direction Figure 1 Table 2 Dimensions of four-track magnetic head gap and sound track (as shown in Figure 2)4 H (test) 3.B+0. 05 7. 9\u00b10. 05 6. 4\u00b10, 05 12, 8\u00b10,05 19, 2\u00b10.05 34. 97 Co-aligned track Group chip certificate direction GB/T 4637\u201494 Figure 2 Headway belt Center Six-track magnetic head joint and sound size (as shown in Figure 3) 3 H (numerical test) Moving The running direction of the meter Figure 3 2- 54\u00b1 0. 05 7. 34 \u00b10. 05 4.06\u00b10.05 8. 12 \u00b10. 05bzxZ.net 12.18\u00b1.0.05 16.24\u00b10.05 20. 30 +0.05 34.97 Central Energy GB/T 4637-94 In actual work, there are many different ways to use the six-track format, so the use method of the track should be clearly marked on each disk. Note: The number and use method of the track should be marked on the reel and the box. Additional instructions This standard was proposed by the Ministry of Radio, Film and Television of the People's Republic of China and is under the jurisdiction of the China Film Science and Technology Research Institute of the Ministry of Radio, Film and Television. This standard was drafted by the China Film Science and Technology Research Institute of the Ministry of Radio, Film and Television. Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.