The AAC audio codec problem on DM6467 platform
The audio codec we applied is found in DM6467 DVSDK Combos 2.05, whose version is AAC Encoder on C64x+ Version 1.20
We have found some abnorm conditions:
Configuration:
Object type: AAc-LC or HE AAC
channel mode: Stereo
Samplerate: 48000
Bitrate: 32000
1. When we feed the input with one channel normal audio and the other channel mute, the output audio can be heard some low frequence echo and the voice was obviously distorted.
2. When we feed the two channel input with two different audio programs, we can also hear the two channels have some low frequence audio alias(overlapping).
With the same configuration, AAC-HEv2 works well.
And when the bitrate increased with same samplerate and channel mode set, the output heard fine.