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Topic: ISO AAC encoder (Read 6487 times) previous topic - next topic
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ISO AAC encoder

hi,
Has anyone here ever tried ISO AAC encoder? How do you like the quality of LC@128kbps?
I used to think its high complexity of computing would to some extent guarantee an average quality but it turns out to be quite poor (faraway behind) against other commercial ones, e.g. NERO.
Is this true? I am not sure whether I have made mistakes in building ISO binary. Anyone understand how that huge gap comes up?

Thanks.

ISO AAC encoder

Reply #1 –
The ISO encoder is only built to demonstrate how to produce ISO-compliant output. This says nothing about quality, speed or efficiency. It probably uses a very basic psymodel and its various parameters have not been tuned by listening tests.

ISO AAC encoder

Reply #2 –
Thanks. I am very curious in an optimum psy model implementation. Is there any quality optimized psy model? Any reference code, implementation or paper? I know that NERO is a leading product in this field but it is not open source product.

Quote from: eofor on
The ISO encoder is only built to demonstrate how to produce ISO-compliant output. This says nothing about quality, speed or efficiency. It probably uses a very basic psymodel and its various parameters have not been tuned by listening tests.

ISO AAC encoder

Reply #3 –
Quote from: andyquan on
Thanks. I am very curious in an optimum psy model implementation. Is there any quality optimized psy model? Any reference code, implementation or paper? I know that NERO is a leading product in this field but it is not open source product.


An LGPL AAC Encoder is being worked on as part of the Google Summer of Code for the FFmpeg project. It is already functional and its author is now working on psychoacoustic models.
superdumprob
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"If we knew what it was we were doing, it would not be called research, would it?" - Albert Einstein