Operation Manual

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Main – This format is the same as LC (above), but adds backward prediction.
Low Complexity (LC) – The simplest and most widely used and support AAC audio format.
NOTE: Depending on the player on which the resulting stream will be heard, either choice will use a
specific set of tools to encode the audio stream. You should make your choice based on the
requirement of the playback software or device. The most widely supported format is LC profile.
The Audio Encoder settings provide you with a drop-down box, which includes two choices, as
follows:
AAC (Advanced Audio Coding) is a standardized, lossy compression and encoding scheme
for digital audio. AAC achieves better audio quality than MP3 and has been named a
standard by the Motion Picture Experts Group (MPEG)
AMR (Adaptive Multi-Rate Narrow-Band) is an audio data compression scheme optimized
for speech coding. AMR was adopted as the standard narrowband speech codec by 3GPP
and is widely used in GSM.
NOTE: When you select AMR Encoder for audio, the audio will automatically be encoded using
8 kHz mono for playback on cell phones.