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Sound
Digital Delay For Application in Surround Sound
TITLE PAGE
ABSTRACT
ACKNOWLEDGEMENTS
1.0 INTRODUCTION
1.1 MULTI-CHANNEL REPRODUCTION
1.1.1 Hafler Surround Sound
1.1.2 Quadraphonics
1.1.3 Ambisonics
1.1.4 Film Surround Sound
1.2 STEREO IMAGE WIDENING TECHNIQUES
1.2.1 Holophonics
1.2.2 Q Sound and Roland Sound Space (R.S.S.)
1.3 AUTHOR CONTRIBUTION
2.0 THEORY
2.1 DIGITAL
2.1.1 Conversion and RAM
2.1.2 Control
2.1.3 Timing and Master Reset
2.2 ANALOGUE
2.2.1 Input
2.2.2 Output
2.2.3 Power Supply
3.0 DESCRIPTION OF PRACTICAL WORK
3.1 CONSTRUCTION DETAILS
3.2 CIRCUIT BOARD DETAILS
3.2.1 14-Bit Up Counter Board
3.2.2 RAM Board
3.2.3 Conversion Board
3.2.4 Control Board
3.2.5 Clocks and Master Reset Board
3.2.6 Analogue Board
3.2.7 Power Supply Board
3.3 SUBJECTIVE PSYCHOACOUSTIC TESTING
3.3.1 Objective
3.3.2 Questionnaire
4.0 RESULTS
4.1 ELECTRICAL TESTING
4.1.1 Frequency Response
4.1.2 Signal to Noise Ratio
4.1.3 Phase Characteristic and Delay Time Measurement
4.2 SUBJECTIVE PSYCHOACOUSTIC TESTING
4.2.1 First Piece
4.2.2 Second Piece
4.2.3 Comparisons With Other Systems
4.2.4 Commercial Viability
4.2.5 General Comments
5.0 DISCUSSION
5.1 DESIGN
5.1.1 Frequency Response
5.1.2 Signal to Noise Ratio
5.1.3 Phase
5.2 PSYCHOACOUSTIC TESTING
7.0 FURTHER WORK
7.1 DIGITAL
7.2 GENERAL
REFERENCES
APPENDICES
APPENDIX A
Circuit Block Diagrams
APPENDIX B
Timing Equations and Circuit Block Diagrams
APPENDIX C
Filter Set 1
APPENDIX D
I.C. Pinouts
APPENDIX E
Questionnaire
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