Cisco D9040 User And Service Manual page 41

Audio and Data Interfaces,
Dolby Digital Encoding
The audio inputs may be encoded in the following ways:
• Dual Mono 1+1
• Stereo 2/0
• Mono 1/0
You can set the sampling frequency for the digitizing process to one of the
following values:
• 32 kHz
• 44.1 kHz
• 48 kHz.
The D9040 Encoder locks the audio sampling frequency to the video. For AES/EBU
digital input signals, the D9040 Encoder automatically adapts the incoming rate by
using sample rate conversion.
Dolby Digital Passthrough
The D9040 Encoder supports passthrough of up to four pre-encoded Dolby Digital
stereo channels.
AAC Encoding
The audio inputs may be encoded in the following ways:
• Dual Mono 1+1,
• Single Mono 1/0,
• Stereo 2/0,
• Joint Stereo 2/0,
• Mono 1/0 LR
You can set the sampling frequency for the digitizing process to one of the
following values:
• 32 kHz
• 44.1 kHz
• 48 kHz.
The D9040 Encoder locks the audio sampling frequency to the video. For AES/EBU
digital input signals, the D9040 Encoder automatically adapts the incoming rate by
using sample rate conversion.
AAC Passthrough.
The D9040 Encoder supports passthrough of up to four pre-encoded AAC channels.
Audio Only
The D9040 Encoder supports up to eight mono or four stereo audio only programs.
One or more audio sources can be combined to make up a program.
4020024 Rev C
Continued
Introduction 2-9