1、BRITISH STANDARD BS EN 61119-5:1995 IEC 1119-5: 1993 Digital audio tape cassette system (DAT) Part 5: DAT for professional use The European Standard EN 61119-5:1995 has the status of a British StandardBSEN61119-5:1995 This British Standard, having been prepared under the directionof the Electrotechn
2、ical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15 July1995 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference EPL/60 Draft for comment 89/32982 DC ISBN 0 580 24319 2 Committees responsible for this Bri
3、tish Standard The preparation of this British Standard was entrusted to Technical Committee EPL/60, Recording, upon which the following bodies were represented: Association of Professional Recording Services Limited Audio Engineering Society British Broadcasting Corporation British Kinematograph, So
4、und and Television Society British Tape Industry Association Federation of the Electronics Industry ITV Association (ITVA) National Council for Educational Technology (NCET) Royal Photographic Society Royal Television Society Amendments issued since publication Amd. No. Date CommentsBSEN61119-5:1995
5、 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61119-5 3 List of references Inside back coverBSEN61119-5:1995 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee EPL/60 and is the English l
6、anguage version of EN61119-5:1995 Digital audio tape cassette system Part5: DAT for professional use, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1119-5:1993, published by the International Electrotechnical Commission (IEC). BS EN61119
7、consists of the following Parts: Part 1: Dimensions and characteristics; Part 2: DAT calibration tape; Part 3: DAT tape properties; Part 4: Character pack format; Part 5: DAT for professional use; Part 6: Serial copy management system; Part 7: DAT logo application rule 1) . A British Standard does n
8、ot purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside
9、front cover, pages i and ii, theEN title page, pages2 to14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In preparation. Cross-reference
10、s International Standard Corresponding British Standard EN60958:1990 (IEC958:1989) BS EN60958:1995 Specification for digital audio interface EN61119-1:1992 BS EN61119 Digital audio tape cassette system (DAT) (IEC1119-1:1992) Part 1:1994 Dimensions and characteristics IEC461:1986 BS6865:1987 Specific
11、ation for time and control codes for video tape recordersEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61119-5 January 1995 ICS 33.160.30 Descriptors: Sound recording, digital recording, data recording devices, audiocassettes, magnetic tapes, recording tracks, layout, codification, track forma
12、ts, characteristics English version Digital audio tape cassette system (DAT) Part5: DAT forprofessional use (IEC1119-5:1993) Systme audionumrique cassette (DAT) Partie5: DAT pour usage professionnel (CEI1119-5:1993) Digitales Tonband-Kassetten-System (DAT) Teil5: DAT fr professionelle Anwendung (IEC
13、1119-5:1993) This European Standard was approved by CENELEC on1994-12-06. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibl
14、iographical 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, German). A version in any other language made by translation under the responsibili
15、ty 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherl
16、ands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyrig
17、ht reserved to CENELEC members Ref. No. EN61119-5:1995EEN61119-5:1995 2 BSI 10-1999 Foreword The text of the International Standard IEC1119-5:1993, prepared by SC60A, Sound recording, of IECTC60, Recording, was submitted to the formal vote and was approved by CENELEC as EN61119-5 on1994-12-06 withou
18、t any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A is informative. Annex ZA has been added by CENELEC. Contents P
19、age Foreword 2 1 Scope and object 3 2 Normative references 3 3 Description of the system 3 6 Track configuration and pattern 3 6.1 Track configuration 3 6.1.1 Tape speed and number of tracks per second 3 11 Audio encoding 3 11.1 Mode application 3 11.1.1 Audio encoding mode 3 11.1.2 System applicati
20、on 3 11.2 Source encoding 3 11.2.1 Pre-emphasis 3 11.2.2 Number of audio channels 3 11.2.3 Sampling frequency 4 11.2.4 Sampling timing 4 11.2.5 Quantization 4 11.3 Word to symbol conversion 4 11.3.1 Audio data word 4 11.3.2 48k mode, 44k mode and 32k mode 4 11.4 Interleave format 4 11.4.1 48k mode,
21、44k mode and 32k mode 4 12 Subcode encoding for audio use 5 12.1 Subcode in main ID 5 12.1.1 Bit assignment of ID1 to ID7 5 12.3 Subcode in subdata 5 12.3.4 Professional time and control code recording 5 12.3.4.1 Pro R Time pack 6 12.3.4.2 Pro binary pack 11 12.3.4.3 Alignment of Pro DAT time and co
22、ntrol code to audio signal 13 12.4 Subcode in main data 13 12.5 Application rules of subcode for pre-recorded tape 13 Annex A (informative) Advice for the professional applications of DAT 14 Annex ZA (normative) Other international publications quoted in this standard with thereferences of the relev
23、ant Europeanpublications 14 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1995-12-15 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1995-12-15EN61119-5:1995
24、BSI 10-1999 3 Explanatory notes IEC1119-5 shall be used in conjunction with the first edition(1992) of IEC1119-1: Digital audio tape cassette system (DAT) Part1: Dimensions and characteristics. The clause numbers of this Part5 corresponds to those in IEC1119-1, and any text given in this Part5shall
25、modify the text given in IEC1119-1. Absence of text in this Part5 indicates that the provisions of the relevant clause in IEC1119-1 shall apply. 1 Scope and object This part of IEC1119 applies to professional use of the digital audio tape cassette system (DAT) for recording and/or reproducing digita
26、l audio signals. It defines the mechanical and electrical characteristics necessary to ensure full interchangeability between software and hardware in any geographical location. 2 Normative references The following normative documents contain provisions which, through reference in this text, constit
27、ute provisions of this part of IEC1119. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC1119 are encouraged to investigate the possibility of applying the most recent editions of the no
28、rmative documents indicated below. Members of IECand ISO maintain registers of currently valid International Standards. IEC461:1986, Time and control code for video tape recorders. IEC958:1989, Digital audio interface. IEC1119-1:1992, Digital audio tape cassette system (DAT) Part1: Dimensions and ch
29、aracteristics. 3 Description of the system The information carrier is a magnetic tape of3,81mm width wound on flangeless hubs which are located in a cassette containing a slider and a lid to protect the tape from accidental damage. The tape is of the metal powder type or its equivalent. The digital
30、information is recorded using the helical scanning principle and can be erased by overwriting. The digital information is read by magnetic heads using an automatic track finding (ATF) scheme for following the tracks. 6 Track configuration and pattern 6.1 Track configuration 6.1.1 Tape speed and numb
31、er of tracks per second The speed of the magnetic tape shall be8,150mm/s 0,5% and the number of tracks recorded per second shall be200/3. 11 Audio encoding 11.1 Mode application 11.1.1 Audio encoding mode Three audio encoding modes are specified. These modes are called the48k mode, the44k mode and t
32、he32k mode. 11.1.2 System application The48k mode is mandatory. The44k mode and32k mode are optional. 11.2 Source encoding 11.2.1 Pre-emphasis In general the use of pre-emphasis is not recommended. If pre-emphasis is applied, it shall be identified on the tape and shall have the same characteristics
33、 as IEC1119-1. 11.2.2 Number of audio channels Two channels of the audio signal, indicated as A and B, can be recorded in the48k mode,44k mode and32k mode.EN61119-5:1995 4 BSI 10-1999 The channels A and B correspond to left and right channels respectively, in stereophonic use. 11.2.3 Sampling freque
34、ncy The accuracy of the sampling frequency at the encoding shall be within 50.10 6 . 11.2.4 Sampling timing The two channels shall be sampled simultaneously. 11.2.5 Quantization Each audio sample shall be quantized linearly and be expressed in16bits only,2s complement notation. 11.3 Word to symbol c
35、onversion 11.3.1 Audio data word The audio data word is comprised of a16-bit code only. The i-th sample of the audio word is expressed as A iand B icorresponding to audio channel A and B, respectively. 11.3.2 48k mode,44k mode and32k mode Identical to IEC1119-1. 11.4 Interleave format 11.4.1 48k mod
36、e,44k mode and32k mode Identical to IEC1119-1.EN61119-5:1995 BSI 10-1999 5 12 Subcode encoding for audio use 12.1 Subcode in main ID 12.1.1 Bit assignment of ID1 to ID7 12.3 Subcode in subdata 12.3.4 Professional time and control code recording Time and control code of IEC461 or the channel status d
37、ata for professional use of IEC958, (hereinafter called Pro DIO channel status) are transformed into Pro DAT time and control code, and this Pro DAT time and control code is recorded in the subdata area in the form of packs on a DAT tape. When it is played back, the Pro DAT time and control code fro
38、m the tape is re-transformed back into IEC time and control code and/or Pro DIO channel status. The time information of IEC461 is hereinafter called IEC time address. The time information (local sample address code or time-of-day sample address code) of Pro DIO channel status is called Pro DIO sampl
39、e address code. The remaining data (except time information of IEC461 or Pro DIO channel status) is hereinafter called the non-time information. Pro DAT time and control code consists of two packs. One is Pro R Time pack, which carries the IEC time address or Pro DIO sample address code. The other i
40、s Pro binary pack, which carries the non-time information of IEC461 or Pro DIO channel status. Usage Bit assignment ID1 Pre-emphasis B5 0 0 1 1 B4 0 1 0 1 off 50/15s reserved reserved ID2 Sampling frequency B7 0 0 1 1 B6 0 1 0 1 48 kHz 44,1 kHz 32 kHz reserved ID3 Number of channels B5 0 0 1 1 B4 0
41、1 0 1 2 channels reserved reserved reserved ID4 Quantization B7 0 0 1 1 B6 0 1 0 1 16 bits linear reserved reserved reserved ID5 Track pitch B5 0 0 1 1 B4 0 1 0 1 normal track mode reserved reserved reserved ID6 Digital copy B7 0 0 1 1 B6 0 1 0 1 permitted reserved prohibited reserved ID7 Pack B5 B4
42、 Pack contentsEN61119-5:1995 6 BSI 10-1999 To identify the time and control code, subpack items are defined as follows. 12.3.4.1 Pro R Time pack 12.3.4.1.1 Pro R Time pack format Pack item =0011 PC1,B3 =1: Pro R Time IEC time address and Pro DIO sample address code are recorded in this pack. Subpack
43、 item (PC1 B1,B0) is used for the identification of the time information of Pro DAT time and control code recorded in this pack. a) Subpack item: SPI1, SPI0 Assignment for subpack item is given in the following table: When Pro DAT time and control code is recorded for a given DAT frame, Pro R Time r
44、elating to the frame shall be recorded at least one time on both tracks. b) Fs ID flags:F1, F0 Fs ID flags indicate the sampling frequency used for the time conversion from IEC time address or Pro DIO sample address code to Pro R Time. It is not recommended to use a sampling frequency which is diffe
45、rent from that of digital audio in normal recording. B7 B6 B5 B4 B3 B2 B1 B0 Pack item PC1 0 0 1 1 1 0 SPI1 SPI0 PC2 F1 F0 T2 T1 T0 (MSB) PC3 11-bits binary data (LSB) PC4 Hour (RH) PC5 Minutes (RM) PC6 Second (RS) PC7 Trame (RF) PC8 Pack parity SPI1 SPI0 Contents 0 0 Time address of IEC 461 0 1 Loc
46、al sample address code of Pro DIO channel status 1 0 Time-of-day sample address code of Pro DIO channel status 1 1 Reserved F1 F0 Sampling frequency 0 0 48 kHz 0 1 44,1 kHz 1 0 32 kHz 1 1 ReservedEN61119-5:1995 BSI 10-1999 7 c) Time and control code flags: T2, T0 Time and control code flags indicate
47、 the origin of the time and control code identified by subpack item and they are defined for each subpack item. 1) SPI1, SPI0 = 00 2) SPI1, SPI0s 00: T2.T0 shall be recorded “000” until defined. d) 11-bit binary data: PC2 B2.B0, PC3 B7.B0 1) SPI1, SPI0 = 00 Time code marker (hereafter called TC Mark
48、er) is recorded. TC Marker is the time difference between IEC time and control code frame and DAT frame. 2) SPI1, SPI0 = 01 or 10 The sample number (hereinafter called Sample No.) is recorded. The Sample No. is the residual number of samples after the32-bit binary code corresponding to the first sam
49、ple in a DAT frame (L0) is converted into hours, minutes, seconds, and frames. 3) The range of value which is indicated by the11-bit binary data is different for each sampling frequency used for the conversion to Pro R Time. e) Hour RH, Minute RM, Second RS, and Frame RF: PC4.PC7B7.B0 RH, RM, RS, and RF are recorded by two-digit BCD, respectively. T2 T1 T0 Transmission rate of IEC time and control code 0 0 0 30 Hz 0 0 1 29,97 Hz, non-drop frame 0 1 0 29,97 Hz, drop frame 0 1 1 25 Hz 1 0 0 24 Hz 1 0 1 1 1 0 Reserved 1 1 1 Samp
