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Front Cover
by John Watkinson
Art of Digital Audio, 3rd Edition
Front Cover
Half Title
Dedication
Title Page
Copyright
Contents
Preface
Acknowledgements
Chapter 1 Why digital?
1.1 Introduction
1.2 What is digital audio?
1.3 Why binary?
1.4 Why digital?
1.5 Some digital audio processes outlined
1.6 The sampler
1.7 The programmable delay
1.8 Time compression
1.9 Synchronization
1.10 Error correction and concealment
1.11 Channel coding
1.12 Compression
1.13 Hard disk recorders
1.14 The PCM adaptor
1.15 An open-reel digital recorder
1.16 Rotary head digital recorders
1.17 Digital Compact Cassette
1.18 Digital audio broadcasting
1.19 Audio in PCs
1.20 Networks
Reference
Chapter 2 Some audio principles
2.1 The physics of sound
2.2 The speed of sound
2.3 Wavelength
2.4 Periodic and aperiodic signals
2.5 Sound and the ear
2.6 Hearing
2.7 The cochlea
2.8 Mental processes
2.9 Level and loudness
2.10 Frequency discrimination
2.11 Critical bands
2.12 Beats
2.13 Music and the ear
2.14 The sensation of pitch
2.15 Frequency response and linearity
2.16 The sine wave
2.17 Root mean square measurements
2.18 The deciBel
2.19 Audio level metering
2.20 Vectors
2.21 Phase angle and power factor
2.22 Audio cabling
2.23 EMC
2.24 Electrical safety
References
Chapter 3 Digital principles
3.1 Pure binary code
3.2 Two’s complement
3.3 Introduction to digital processing
3.4 Logic elements
3.5 Storage elements
3.6 Binary adding
3.7 The computer
3.8 The processor
3.9 Interrupts
3.10 Programmable timers
3.11 Timebase compression and correction
3.12 Gain control
3.13 Digital faders and controls
3.14 A digital mixer
3.15 Effects
3.16 The phase-locked loop
3.17 Multiplexing principles
3.18 Packets
3.19 Statistical multiplexing
3.20 Filters
3.21 Transforms
3.22 FIR and IIR filters
3.23 FIR filters
3.24 Sampling rate conversion
3.25 IIR Filters
3.26 The z-transform
3.27 Bandpass filters
3.28 Higher-order filters: cascading
3.29 Pole/zero positions
3.30 The Fourier transform
3.31 The discrete cosine transform (DCT)
3.32 The wavelet transform
3.33 Modulo-n arithmetic
3.34 The Galois field
3.35 Noise and probability
References
Chapter 4 Conversion
4.1 Introduction to conversion
4.2 Sampling and aliasing
4.3 Reconstruction
4.4 Filter design
4.5 Choice of sampling rate
4.6 Sample and hold
4.7 Sampling clock jitter
4.8 Aperture effect
4.9 Quantizing
4.10 Quantizing error
4.11 Introduction to dither
4.12 Requantizing and digital dither
4.13 Dither techniques
4.13.1 Rectangular pdf dither
4.13.2 Triangular pdf dither
4.13.3 Gaussian pdf dither
4.14 Basic digital-to-analog conversion
4.15 Basic analog-to-digital conversion
4.16 Alternative convertors
4.17 Oversampling
4.18 Oversampling without noise shaping
4.19 Noise shaping
4.20 Noise-shaping ADCs
4.21 A one-bit DAC
4.22 One-bit noise-shaping ADCs
4.23 Operating levels in digital audio
References
Chapter 5 Compression
5.1 Introduction
5.2 Lossless and perceptive coding
5.3 Compression principles
5.4 Codec level calibration
5.5 Quality measurement
5.6 The limits
5.7 Some guidelines
5.8 Audio compression tools
5.9 Sub-band coding
5.10 Transform coding
5.11 Compression formats
5.12 MPEG Audio compression
5.13 MPEG Layer I
5.14 MPEG Layer II
5.15 MPEG Layer III
5.16 MPEG-2 AAC
5.17 apt-X
5.18 Dolby AC-3
5.19 ATRAC
References
Chapter 6 Digital recording and transmission principles
6.1 Introduction to the channel
6.2 Types of transmission channel
6.3 Types of recording medium
6.4 Magnetism
6.5 Magnetic recording
6.6 Azimuth recording and rotary heads
6.7 Optical disks
6.8 Magneto-optical disks
6.9 Equalization
6.10 Data separation
6.11 Slicing
6.12 Jitter rejection
6.13 Channel coding
6.14 Recording-oriented codes
6.15 Transmission-oriented codes
6.16 General-purpose codes
6.17 Miller2 code
6.18 Group codes
6.19 4/5 code of MADI
6.20 2/3 code
6.21 EFM code in CD
6.22 The 8/10 group code of DAT
6.23 Tracking signals
6.24 Convolutional RLL codes
6.25 Graceful degradation
6.26 Randomizing
6.27 Communications codes
6.28 Convolutional randomizing
6.29 Synchronizing
References
Chapter 7 Error correction
7.1 Sensitivity of message to error
7.2 Error mechanisms
7.3 Basic error correction
7.4 Error handling
7.5 Concealment by interpolation
7.6 Parity
7.7 Block and convolutional codes
7.8 Hamming code
7.9 Hamming distance
7.10 Cyclic codes
7.11 Punctured codes
7.12 Applications of cyclic codes
7.13 Burst correction
7.14 Introduction to the Reed–Solomon codes
7.15 R–S calculations
7.16 Correction by erasure
7.17 Interleaving
7.18 Product codes
7.19 Introduction to error correction in DAT
7.20 Editing interleaved recordings
Appendix 7.1 Calculation of Reed–Solomon generator polynomials
References
Chapter 8 Transmission
8.1 Introduction
8.2 Introduction to AES/EBU interface
8.3 The electrical interface
8.4 Frame structure
8.5 Talkback in auxiliary data
8.6 Professional channel status
8.7 Consumer channel status
8.8 User bits
8.9 MADI – multi-channel digital audio interface
8.10 MADI data transmission
8.11 MADI frame structure
8.12 MADI audio channel format
8.13 Fibre-optic interfacing
8.14 Synchronizing
8.15 Asynchronous operation
8.16 Routing
8.17 Networks
8.18 Introduction to NICAM 728
8.19 Audio in digital television broadcasting
8.20 Packets and time stamps
8.21 MPEG transport streams
8.22 Clock references
8.23 Program Specific Information (PSI)
8.24 Multiplexing
8.25 Introduction to DAB
8.26 DAB principles
References
Chapter 9 Digital audio tape recorders
9.1 Types of recorder
9.2 PCM adaptors
9.3 Introduction to DAT
9.4 Track following in DAT
9.5 Aligning for interchange
9.6 DAT data channel
9.7 Sound and subcode in shuttle
9.8 Timecode in DAT
9.9 Non-tracking replay
9.10 Quarter-inch rotary
9.11 Half-inch and 8 mm rotary formats
9.12 Digital audio in VTRs
9.13 Stationary-head recorders
9.14 DASH format
9.15 DCC – digital compact cassette
Appendix 9.1 Timecode for Pro R conversion
References
Chapter 10 Magnetic disk drives
10.1 Types of disk drive
10.2 Disk terminology
10.3 Structure of disk
10.4 Principle of flying head
10.5 Reading and writing
10.6 Moving the heads
10.7 Controlling a seek
10.8 Rotation
10.9 Servo-surface disks
10.10 Soft sectoring
10.11 Winchester technology
10.12 Servo-surface Winchester drives
10.13 Rotary positioners
10.14 Floppy disks
10.15 Error handling
10.16 RAID arrays
10.17 The disk controller
10.18 Digital audio disk systems
10.19 Arranging the audio data on disk
10.20 Spooling files
10.21 Broadcast applications
10.22 Sampling rate and playing time
References
Chapter 11 Digital audio editing
11.1 Introduction
11.2 Editing with random access media
11.3 Editing on recording media
11.4 The structure of an editor
11.5 Timecode
11.6 Locating the edit point
11.7 Editing with disk drives
11.8 CD mastering
11.9 Editing in DAT
11.10 Editing in open-reel digital recorders
11.11 Jump editing
References
Chapter 12 Digital audio in optical disks
12.1 Types of optical disk
12.2 CD, DVD and MD contrasted
12.3 CD and MD – disk construction
12.4 Rejecting surface contamination
12.5 Playing optical disks
12.6 Focus systems
12.7 Tracking systems
12.8 Typical pickups
12.9 DVD and CD readout in detail
12.10 How optical disks are made
12.11 Direct metal mastering
12.12 MiniDisc read/write in detail
12.13 How recordable MiniDiscs are made
12.14 Channel code of CD and MiniDisc
12.15 Deserialization
12.16 Error-correction strategy
12.17 Track layout of MD
12.18 CD subcode
12.19 MD table of contents
12.20 CD player structure
12.21 MD recorder/player structure
12.22 Structure of a DVD player
References
Chapter 13 Sound quality considerations
13.1 Introduction
13.2 Information capacity
13.3 Loudspeaker problems
13.4 Subjective and objective testing
13.5 Objective testing
13.6 Subjective testing
13.7 Digital audio quality
13.8 Use of high sampling rates
13.9 Digital audio interface quality
13.10 Compression in stereo
References
Index
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