Audio coding – Telos ZephyrExpress User Manual

Page 79

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CODING

5-1

SECTION 5

AUDIO CODING

OVERVIEW

5-2

Introduction to Audio Coding

5-2

Basic Principles of Perceptual Coding

5-3

ISO/MPEG LAYER 3

5-5

Layer 3 Features

5-5

Psychoacoustic Masking

5-5

Redundancy Reduction

5-6

Bit Reservoir Buffering

5-6

Ancillary Data

5-6

Layer 3 Joint Stereo

5-7

ISO/MPEG LAYER 2

5-7

Layer 2 Joint Stereo

5-8

Layer 2 Mono-128

5-8

G.722

5-8

CASCADING

5-9

Mixed MPEG Layer 2 And Layer 3 Signal Chains

5-10

CHOOSING THE CODING METHOD FOR YOUR APPLICATION

5-11

Delay vs. Quality

5-12

Dual vs Stereo vs Joint Stereo in Layer 3

5-12

Dual Site Operation

5-13

Layer 2: Mono64kpbs vs MONO128; Dual vs JSTEREO

5-13

Sampling Rate

5-14

Compatibility

5-15

Between Telos Codecs

5-15

With Non-Telos Equipment

5-15

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