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Philips DCC System Description Volume 1

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Philips DCC System Description Volume 1 I - - - I DCC System Description Preface COPYRIGHT The System Description of Digital Compact Cassette (DCC) is published by Philips Consumer Electronics B.V. (Eindhoven, the Netherlands) and has been prepared in close cooperation with Matsushita Electrical lndustrial Co. Ltd. (Osaka, Japanl. All rights are reserved. Reproduction in whole or in part is prohibited without express and prior written permission of Philips Consumer Electronics B.V. DISCI.AIMER The information contained in this document is believed to be accurate as of the date of publication, however, neither Philips Consumer Electronics B.V. nor Matsushita Electrical lndustrial Co. Ltd. will be liable for any damages, including indirect or consequential, from use of the System Description DCC or reliance on the accuracy of this document. cr-AssrFrcATroN The information contained in this document is marked as confidential and shall be treated as confidential according to the provisions of the Agreement through which the document has been obtained. NOTICE For any further explanation of the contents of this document or in case of any perceived inconsistency or ambiguity of interpretation please consult: Philips Consumer Electronics B.V. Coordination Office Optical and Magnetic Media Systems Building SWA-1 P.O.Box 80002 5600 JB Eindhoven The Netherlands Tel: +31 40 736409 Fax: +31 40 732113 1 994 DRAFT CONFIDENTIAL DCC System Description Preface r! I This page is intentionally left blank , Philips Consumer Eloctronics 8.V., September 1994 DRAFT CONFIDENTIAL ii DCC System Description Table of Contents Table of Contents Pagc 1. Scope 1-1 2. Normative references 2-1 Description of the system 3-1 3. 1 lntroduction 3-1 3.2 Basic paranneters 3-2 3.3 Parameters for audio application 3-3 4. Test conditions 4-1 5. Cassette 5-1 5.1 Generalcassettespecifications 5-1 5.1.1 Definitions 5-1 5.1.2 Dimensions of the cassette 5-1 5.1.3 Genera! tolerances for dimensions of the DCC cassette 5-1 5.1.4 Test environment 5-2 5.1.4.1 Mechanical stability of the cassette 5-2 5.1.4.2 Operational environment of tho cassette in a DCC player 5-2 5.1.5 Datum planes A, B and C 5-2 5.1.6 Datum holes 5-2 5.1.7 Support areas 5-2 5.1.8 Cassette holding areas 5-2 5.1.9 DCC Cassette recognition hole 5-3 5.1 .10 Cassette handling 5-3 5.1 .10.1 Changer grips 5-3 5.1.10.2 Storage grips 5-3 5.1 .1 0.3 Grip slot 5-3 .A 5.1.11 Slider 5-3 5.1.11.1 Slider dimensions 5-3 5.1.11.2 Slider operation 5-3 5.1 .1 2 Reels 5-4 5.1 .12.1 Friction torque of the full reel 5-4 5.1.12.2 Friction torque of both reets 5-4 5.1 .1 2.3 Hub lock 5-4 5.1.13 Tape path and guiding elements 5-4 5.1 .1 3.1 Tape path 5-4 5.1.13.2 Pressure pad 5-5 5.1.13.3 Azimuth Locking Pins 5-5 5.1 .1 3.4 Capstan diameter 5-5 5.1.13.5 Head dimensions, FATG (Fixed Azimuth Tape Guidingl 5-5 5.1 .1 3.6 Shielding plate 5-5 (for manufacturers of DCC playcrs) O Philip, Consumor Eloctronics B.V., September 1994 DRAFT CONFIDENTIAL DCC System Description This page is intentionally left blank Philips Consumor Electronics B.V., Septomber 1994 DRAFT CONFIDENTIAL lt DCC System Description Table of Contents Page 5.1,14 Tape windinC 5-5 5.1 .1 4.1 Areas for tape 5-5 5.1.15 Cassette name and identification 5-6 5.1.1 6 Cassette deck interface 5-6 5.1 .1 6.1 Reference pin(s) 5-6 5.1 .1 6.2 Hub 5-6 5.1.17 Dimensions of the Leader and Traiter tape 5-6 5.1.17.1 Surface structure of the Leader and Trailer tape 5-6 5.1.17.2 Aftachment to the hub 5-6 5.1 .17.3 Spticing 5-6 5.1 .1 8 Cassette weight S-7 5,1 .1 9 Electrostatic charge S-7 5.1.20 Tape-capstan slip S-7 5.2 Blank DCC cassette S-g 5.2.1 Label and window area 5-B 5.2.1.1 Label area S-8 5.2.1.2 Window area 5-B 5.2.2 Recognition holes S-8 5.2.2.1 Dimensions 5-8 5.2.2.2 Erasure protection S-8 5.2.2.3 Playing time and thickness indication 5-g 5.2.2.4 Optional recognition holes 5-g 5.2.2.5 Splicing tape 5-g 5.2.2.6 Reflectivity at the back of the leader and traiter tape S-g 5.3 Prerecorded DCC cassette S-lO 5.3.1 Recognition holes S-l O 5.3.1.1 Tape length and thickness indication S-lO 5.3.1 .2 Erasure protection 5-10 5.3.2 Label and window area S-lO 5.3.2.1 Window area S-10 5.3.2.2 Extended label 5-l O 5.3.2.3 Bottom label and printing area S-10 5.3.2.4 L-cover S-11 5.3.2.5 Reflectivity of the splicing tape 5-l 1 5.3.2.6 Reflectivity of the rear of the leader and trailer tape S-l l 6. Tape 6-1 6.1 Scope 6-1 6.2 Types of tape 6-1 6.3 Reference and calibration cassettes (DRTI ) 6-1 6.4 Mechanical properties 6-1 6.4.1 Tape width (including tape width variation) 6-1 6.4.2 Tape width variation 6-1 6.4.3 Total tape thickness 6-1 6.4.4 Yield strength F 1% 6-1 6.4.5 Residual elongation 6-1 6.4.6 Static longitudinal curvature 6-1 Philips Consumer Electronics 8.V., Septenrbcr 1994 DRAFT CONFIDENTIAL lil II DCC System Description 'r, This page is intentionally left blank DRAF- CONFIDENTIAL tv DCC System Description Table of Contents Page 6.4.7 Dynamic single-sided edge variation for upper and lower edge 6-1 6.4.8 Abrasiveness/corrosiveness 6-1 65 Optical and etectrical properties 6-1 6.5.1 Transparency 6-1 6.5.2 Reflectivity (back) 6-1 6.5.3 Coating resistance 6-1 6.6 Tape characteristics 6-2 6.6.1 Signal characteristics, measured on blank cassettes only 6-2 6.6.2 Symbol error rate, measured on prerecorded and blank casseftes 6-3 6.7 Storage tests, measured on prerecorded cassettes and blank cassettes 6-4 6.8 Durability tests 6-5 6.8.1 Play test 6-5 6.8.2 Play, search and wind test 6-5 6.9 Measuring methods for DCC tape properties 6-6 6.9.1 Mechanical properties 6-6 6.9.1 .1 Tape width 6-6 6.9.1.2 Tape width variation 6-6 6.9.1.3 Tape thickness 6-6 6.9.1.4 Yield strength (F 1%) 6-6 6.9.1.5 Residual elongation 6-6 6.9.1.6 Static Iongitudinal curvature 6-7 6.9.1.7 Dynamic single-sided edge variation 6-7 6.9.1.8 Abrasiveness/corrosion 6-7 6.9.2 Optical properties 6-8 6.9.2.1 Transparency 6-8 6.9.2.2 Reflectivity 6-9 6.9.3 Magnetic and electrical properties 6-10 6.9.3.1 Coating resistance 6-10 6.9.4 Tape characteristics measured according to DCC System Description 6-11 6.9.4.1 Conditions 6-1 1 6.9.4,2 lcd+2occ, lc*ro"c and 1"1*6so6 measurement method 6-11 6.9.4.3 Recording current sensitivity 6-11 6.9.4.4 Temperature dependency of the recorded level 6-12 6.9.4.5 Relative signal output level U, 6-12 6.9.4.6 Relative frequency response U, 6-12 6.9.4.7 Overwrite characteristics 6-13 6.9.4.8 Temperature dependency of overwrite characteristics 6-14 6.9.4.9 Functional overwrite characteristics 6-16 6.9.4.10 Carrier-to-Nois€ Ratio 6-16 7. Track configuration 7-1 L Recording parameters 8-1 8.1 Recording parameters for prerecorded tapes 8-1 8.1.1 Recording signals 8-1 8.1 .1 .1 Main data channel bit length 8-1 o Philip" Consumcr Electronicr 8.V., Septornbcr 1994 DRAFT CONFIDENTIAL v DCC System Description 7 t7 This page is intentionalty left blank I 994 DRAFT' CONFIDENT!AL vl DCC System Description Table of Contents Page 8.1.1.2 Aux data channel bit length 8-1 8.1 .1 .3 Polarity 8-1 8.1.2 Recording levets 8-1 8.1.2.1 Measuring method 8-1 8.1.2.2 Main data 8-1 8.1.2.3 Allowed relative level for the Aux data channel 8-1 8.1.3 Recording direction 8-2 8.2 Recording parameters for consumer recorded tapes 8-2 8.2.1 Recording signals 8-2 8.2.1.1 Main data track bit rate 8-2 8.2.1.2 Aux data track bit rate 8-2 8.2.1.3 Polarity '6-2 8.2.2 Recording levels 8-2 8.2.2.1 Measuringmethod 8-2 8.2.2.2 Recording level for each Main data track 8-2 8.2.2.3 Resolution for each Main data track 8-4 8.2.2.4 Temperature effect 8-4 8.2.2.5 Aux data track level 8-4 8.2.2.6 Non identical structure of the record channels 8-4 8.2.2.7 Aux data erase method 8-4 8.2.2.8 Aux data erase current 8-4 8.2.3 Tape speed during recording 8-4 8.2.4 Recording direction 8-5 8.2.5 Erase method 8-5 8.3 Calculation formulae 8-s 9.
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