[M4IF Discuss] the feasibility of mpeg4 in the embedded-system

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I want to discuss the feasibility of mpeg4 in the embedded-system.
The embedded system is a real-time system, and some algorithmics, such as Shape Code, are too complex to realize real-time compression and transport in most occasions.
Does this mean the application of mpeg4 in the real-time system is still immature?
And what is the basic requirement of the DSP hardware in order to resolve the above problem?
Could you give me some advice about this?