ANSI SMPTE ST 11-1995 Video Recording - Quadruplex Recorders Operating at 7.5 in s - Audio Level and Multifrequency Test Tape.pdf
《ANSI SMPTE ST 11-1995 Video Recording - Quadruplex Recorders Operating at 7.5 in s - Audio Level and Multifrequency Test Tape.pdf》由会员分享,可在线阅读,更多相关《ANSI SMPTE ST 11-1995 Video Recording - Quadruplex Recorders Operating at 7.5 in s - Audio Level and Multifrequency Test Tape.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、SUPTE LL 95 835VOL OOOLB V95 SMPTE STANDARD ANSI/SMPTE 11-1995 Revision of ANSVSMPTE 11-1989 for Video Recording - Quadruplex Recorders Operating at 7.5 in/s - Audio Level and MuKiequency Test Tape 1 Scope This standard specifies an audio frequency test tape to be used for adjusting the sensitivity
2、and frequency response of audio 1 record (program audio track) and audio 2 record (cue track) of quadruplex video magnetic tape recorders operating at a tape speed of 7.5 inls (190.5 mmls). The tape shall be used on recorders, operating in accordance with ANSIlSMPTE 3. The operating level and freque
3、ncy response for audio 2 record are specified in SMPTE RP 102. 2 Normative references The following standards contains 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
4、 revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ANSI 54.3-1 982 (R1992), Method for Measurement of Weighted Peak Flutter of Sound Recording and Reproducing Equipment ANSI S
5、4.6-1982 (R1992), Method of Measuring Recorded Flux of Magnetic Sound Records at Medium Wavelengths Page 1 of 6 pages ANSVSMPTE 4-1 995, Television Analog Recording - 2-in Magnetic Tape for Quadruplex Recording -Speed ANSI/SMPTE 6-1 993, Video Recording - 2-in Quad- ruplex Tape - Video, Audio and Tr
6、acking-Control Records ANSI/IEEE 152-1 992, Audio Program Level Measure- ment SMPTE RP 16-1 993, Specifications of Tracking- Control Record for 2-in Cluadruplex Video Magnetic Tape Recordings SMPTE RP 102-1 991, Frequency Response and Operating Level of Recorders and Reproducers for Audio 2 Record f
7、or 2-in Quadruplex Video Magnetic Tape Operating at 15 and 7.5 inls 3 General Specifications 3.1 Dimensions of records The dimensions of pertinent records constituting this test tape shall conform to ANSIlSMPTE 6. 3.2 Tape speed The nominal linear speed of this test tape shall be 7.5 in/s (1 90.5 mm
8、/s) in accoi,dance with ANSI/SMPTE 4. 3.3 Stock ANSIlSMPTE 1-1 990, Video Recording - 2-in Magnetic Recording Tape ANSIlSMPTE 3-1 992, Television Analog Recording - Frequency Response and Operating Level of Recorders and Reproducers - Audio 1 Record on 2-in Tape Operating at 15 and 7.5 inls The test
9、 sections shall be recorded on transversely oriented television magnetic recording tape, the di- mensions of which are specified in ANSI/SMPTE 1. 3.4 Video signal A color black video signal may be recorded. CAUTION NOTICE This Standard may be revised or withdrawn at any time The procedures of the St
10、andard Developer requiie 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 current information on all standards by calling or writina the Standard Develooer Printed in USA. Copyright O 1995 by
11、 THE SOCIETY OF - American National Standard MOTION PICTURE AND TELEVISION ENGINEERS 595 W Hartsdale Ave, White Pians. NY 10607 (914) 761-1100 Approved February 13,1995 SMPTE 11 75 83574011 00011878 321 ANSI/SMPTE 11-1995 3.5 Tracking-control signal A tracking control signal, conforming to that spec
12、ified in SMPTE RP 16, as applicable, shall be recorded throughout the tape. 3.6 Identification Voice announcement at the beginning of this tape shall provide identification as to the applicable American National Standard, the test tape manufac- turer, and the flux (in nanowebers per meter) of the op
13、erating level test tones defined in 4.1 recorded on audio 1 record and audio 2 record. Each test section and segment shall be preceded by voice an- nouncements at a level approximately 5 dB below operating level identifying the content of that particular recorded segment. 3.7 Flutter The weighted pe
14、ak flutter of this test tape shall not exceed 0.2%. 3.8 Azimuth The azimuth of the signal recorded on the tape shall be 90“ f 3 to the reference edge of the tape. 4 Audio 1 record test sections 4.1 Audio operating level section This section is used to calibrate the sensitivity of the audio reproduci
15、ng system. 4.1.1 Frequency The frequency of the recording shall be 1 O00 Hz f 2% when the tape is reproduced at exactly 7.5 inls (190.5 rn mls) . 4.1.2 Tape flux per unit track width The audio operating level test recording has an rms short circuit tape flux per unit track width of 11 O nWb/m f 3 nW
16、b/m. 4.1.3 Flux level variation The flux level variation during the length of the tone shall fall within an envelope whose total width is 0.5 dB. 4.1.4 Distortion The total harmonic distortion of this section when reproduced shall not exceed 2%. 4.1.5 Duration The minimum duration of this section sh
17、all be one minute. 4.2 Frequency response section Recorded on audio 1 record, this section is to be used to calibrate the frequency response of the audio reproducing system of a quadruplex video magnetic tape recorder. 4.2.1 Frequencies The following test segment frequencies (in hertz) shall be reco
18、rded in the order given: 1 O00 (reference) 4000 63 8000 125 10 O00 250 12 500 500 16 O00 1 O00 1 O00 (reference) 2000 The frequency of each recording shall be within f 2% of its specified value when the tape is reproduced at exactly 7.5 in/s (1 90.5 mm/s). 4.2.2 Tape flux level vs frequency The rela
19、tive short circuit tape flux level versus frequency expressed in decibels shall be as given by the following equation: b (f) re 110 nWb/m = -9.8 t 10 logio l + (Fim2 / l + (f/Fh)* 1 dBl where Ls, is the relative tape flux level; f is the frequency at which the response is being computed; FI is the l
20、ow-frequency transition frequency, 80 Hz; and Fh is the high-frequency transition frequency, 4500 Hz. A graph of this equation is shown in figure 1. The values of the tape flux and relative flux level are given in table 1. Page 2 of 6 pages SMPTE IJL 95 8357403 O003879 268 ANSI/SMPTE 11-1995 RELATIV
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ANSISMPTEST111995VIDEORECORDINGQUADRUPLEXRECORDERSOPERATINGAT75INSAUDIOLEVELANDMULTIFREQUENCYTESTTAPEPDF

链接地址:http://www.mydoc123.com/p-437921.html