EN 61120-2-1993 en Digital Audio Tape Recorder Reel to Reel System Using 6 3 mm Magnetic Tape for Professional Use Part 2 Format A《专业用6 3 mm磁带的数字音频盘式磁带录音系统 第2部分 格式A(IEC 1120-2 1991.pdf
《EN 61120-2-1993 en Digital Audio Tape Recorder Reel to Reel System Using 6 3 mm Magnetic Tape for Professional Use Part 2 Format A《专业用6 3 mm磁带的数字音频盘式磁带录音系统 第2部分 格式A(IEC 1120-2 1991.pdf》由会员分享,可在线阅读,更多相关《EN 61120-2-1993 en Digital Audio Tape Recorder Reel to Reel System Using 6 3 mm Magnetic Tape for Professional Use Part 2 Format A《专业用6 3 mm磁带的数字音频盘式磁带录音系统 第2部分 格式A(IEC 1120-2 1991.pdf(22页珍藏版)》请在麦多课文档分享上搜索。
1、3404583 OOLL39 5LL EUROPEAN STANDARD EUROPISCHE NORM NORME EUROPENNE EN 61120-2 October 1993 UDC 621.396.7 : 681.84.083.84 : 681.327.636 Descriptors: Audio recording, digital recording, magnetic tape, data converter, code, format, recording characteristics, recording track English version Digital au
2、dio tape recorder reel to reel system, using 6)3 mm magnetic tape, for professional use Part 2: Format A (IEC 1120-2 : 1991) Systme denregistrement bande audionumrique, bobine bobine, utilisant une bande magntique de 6,3 mm, usage professionnel %il 2: Format A Digitales nnbandgert Spulensystem mit M
3、agnetband 6,3 mm fr Studioanwendungen Partie 2: Format A (CE1 1120-2 : 1991) (IEC 1120-2 : 1991) This European Standard was approved by CENELEC on 1993-09-22. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard
4、 the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French,
5、 German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Den
6、mark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotec
7、hnische Normung Central Secretariat: rue de Stassart 35, B- 1050 Brussels O 1993 Copyright reserved to CENELEC members Ref. No. EN 61120-2 : 1993 E = 3404583 OOLL40 233 Page 2 EN 61120-2 : 1993 Foreword The CENELEC questionnaire procedure, performed for finding out whether or not the International S
8、tandard IEC 1120-2 : 1991 could be accepted without textual changes, has shown that no common modifications were necessary for the acceptance as a European Standard. The reference document was submitted to the CENELEC members for formal vote and was approved by CENELEC as EN 61120-2 on 22 September
9、1993. The following dates were fixed: - latest date of publication . of an identical national standard (dop) 1994-09-01 - latest date of withdrawal of conflicting national standards (dow) 1994-09-01 For products which have complied with the relevant national standard before 1994-09-01, as shown by t
10、he manufacturer or by a certification body, this previous standard may continue to apply for production until 1999-09-01. Annexes designated normative are part of the body of the standard. In this standard, annex ZA is normative. 3404583 009LL41 17T Page 3 EN 61120-2 : 1993 CONTENTS 1 Main hck recor
11、ding . 1.1 1.2 1.3 1.4 1.5 Recording modulation method Signai Mock structure . 1.2.1 The Word fmat 1.2.2 The block structure . 1.2.3 SynchronizatEon pattern . Signai word distribution to tracks Error protection method . 1.4.1 The error correction code 1.4.1.1 C2Encoder 1.4.1.2 C1 der 1.4.2 Interleav
12、e sequen . Recording and reproducing characteristics . 1.5.1 Reference tape 1.5.2 Calibration tapes . 1.5.3 Procedure for adjusting recording current level and waveform 1.5.4 Spedficaons of tolerance relative to calibration tape . 2 Sub-track recording . 2.1 Digital recording method . Recording meth
13、od on sub-track 2 2.1.1 2.2 Alignment of digital audio signals and sub-track signals . 2.2.1 Alignment of cue audio-1 and cu8 audio-2 trade signal . 22.2 Alignment of time code iracl( signai . 3 Control word . 3.1 Control word configuration 3.2 Control data assignment 3.3 Block address . 3.4 C3 Enco
14、der 4 4 5 5 5 6 6 6 7 9 10 18 18 18 18 9 18 18 18 18 18 18 19 19 19 19 21 21 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 22 3404583 OOLL42 OOb W O0 O0 00 O0 Page 4 EN 61120-2 : 1993 O000 o001 O000 o1 O0 DIGIT
15、AL AUDIO TAPE RECORDER REEL TO REEL SYSTEM, USING 6,3 mm MAGNETIC TAPE, FOR PROFESSIONAL USE Part 2: Format A Electrical requirements for recording and reproducing equipment. 1 Main track recording 1.1 Recording modulation method In this subclause a method is first defined to convert binary data seq
16、uence of each of the 8 main digital tracks for recording on the magnetic tape. The second item described In 1.2.3, Is the definition of the synchronization pattern in recording code. The converted code is given by NRZI. The 2/4 M system is defined by dividing a binary data sequence into two-bit data
17、 segments and converting these into four-cell codes using the data of the four bits preceding and the four bits succeeding the two-bit data segment. The system uses the collected data to convert the two-bit data segments into four-cell codes ensuring that no less than two and no more than seven code
18、 cells “O“ exist between any code cells “1“ in a sequence of converted code. The conversion rule is given by the following table. 2i4 M conversion table “ O000 O100 YO0 1 Contents Unconditional E2 E, “10“ and 1, = OO “E, E,“ = 1 O and Il 4. I 00“ .E, E,“ = =io=, “L, L2“ I lo and I, L; = DO E, E, # 1
19、 O, “L, L; = 1 O and “I, L, = 00“ Except the foregoing E, c +-io-, WE ,9 = -109 and .L, 4 901 E, lo“, “E, E,“ I “10“ and .L, L,“ e D1 E, Es = lo and “E, E, = “10“ Except the foregoing where: E, = data bits preceded by n-bit. to 2-bit data to be conveited in original data sequence L, I data bits succ
20、eded by n-bit, to 2-bit data to be converted in original data sequence Y complement logic of logical sum of two cells immediately before code bit Y in the converted code sequence The converted code is given by N RZI. Page 5 EN 61120-2 : 1993 SYNC CTRLW or C3 PCM DATA or C2 CHECK 1.2 Signal block str
21、ucture 1.2.1 The word format - Main C1 (CRC) track The word slots to be recorded on the main tracks have 20 bits at speed I and 16 bits at speed II. PCM samples are specified as uniformly quantified and are represented in the form of sign bit (MSB) leading. 1.2.2 The block structure The following fi
22、gure shows the data configuration and the contents of frames and blocks. I+ t +I 4. 1 SYNC SYNC SYNC SYNC SYNC SYNC SYNC SYNC C3 CHECK C3 CHECK BA BA ID ID C3 CHECK C3 CHECK C2 CHECK PCM DATA PCM DATA PCM DATA PCM DATA PCM DATA PCM DATA C2 CHECK C1 (CRC) C1 (CRC) C1 (CRC) C1 (CRC) C1 (CRC) C1 (CRC)
23、C1 (CRC) C1 (CRC) Track 8 Track 7 Track 6 Track 5 Track 4 Track 3 Track 2 Track 1 Block configurat-ion Legend: BA P Blocaddress ID = Identification data Frame and block parameters: . SYNC length . p = 16 bits . Control word or C3 length . cw = 8 bits . Data or C2 length . d = 320 bits . C1 (CRC) len
24、gth . C = 16 blts . Frame length . f = 360 bits . Block configuration . b I 8 frames W 3404583 0091L44 989 Page 6 EN 61120-2 : 1993 1.2.3 Synchronization pattern The synchronization pattern in recording code consists of 32 cells, in which the magnetira- tion reversion interval is confined within the
- 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:
- EN6112021993ENDIGITALAUDIOTAPERECORDERREELTOREELSYSTEMUSING63MMMAGNETICTAPEFORPROFESSIONALUSEPART2FORMATA

链接地址:http://www.mydoc123.com/p-719523.html