TANDBERG EN8000, Справочное руководство

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Reference Guide: EN8000 MPEG-4 PArt 10 (H.264/AVC) Encoders Page E-1
ST.RE.E10233.1
Annex E
E. Audio Modes
Contents
E.1 A Brief Introduction to Coding Standards ..........E-3
E.1.1 MPEG Standards ...................................E-3
Background............................................E-3
MPEG-1 Layer II ....................................E-3
MPEG-2 AAC–LC (Advanced Audio
Coding) ..................................................E-3
MPEG-4 HE AAC...................................E-4
E.1.2 MPEG-4 Formats ...................................E-4
E.1.3 Dolby Digital...........................................E-4
E.2 Audio Coding Modes .........................................E-5
E.2.1 Mono......................................................E-5
E.2.2 Stereo ....................................................E-5
E.2.3 Joint Stereo............................................E-5
E.2.4 Dual Mono .............................................E-5
E.2.5 Surround Sound/5.1...............................E-5
E.2.6 Auto Detect ............................................E-5
E.3 Audio Coding Modules in Encoder ....................E-5
E.3.1 Analogue Audio......................................E-6
Input Impedance ....................................E-6
Clip Levels .............................................E-6
E.3.2 Digital Audio...........................................E-7
Digital Audio on AUDIO IN 2 ..................E-7
Digital Audio on AUDIO IN .....................E-7
Serial Digital Interface Embedded
Audio......................................................E-8
Input Selection .......................................E-8
HD SDI Embedded Audio ......................E-9
HD SDI Input Selection ........................E-10
E.4 Summary.........................................................E-10
List of Figures
Figure E.1: CT-aacPlus Encoder for DRM............................ E-4
Figure E.2: Analogue Audio Route ....................................... E-6
Figure E.3: Digital / SDI Embedded Audio Route ................. E-8
Figure E.4: Embedded Audio (SDI) Signal Flow................... E-9
List of Tables
Table E.1: Codecs with Audio ln 2: Linear PCM audio
input ...................................................................... E-7
Table E.2: Codecs with Audio ln 2: Pre-encoded audio
input ...................................................................... E-7
Table E.3: HD SDI Audio Input and Available Coding
Modes ................................................................. E-10
Table E.4: HD SDI Default DID’s ........................................ E-10
Table E.5: Summary of Audio Coding Modes and
Standards............................................................ E-10