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DM648比DM642整体性能提升有多少 50%以上有吗？
DM648也有和DM642的同频率型号，这个不好说50%吧？但是Cache大小是大了一倍的，也对性能有影响。
具体的对比，请看http://www.ti.com/lsds/ti/dsp/video_processors/dm64x_dsp/products.page?paramCriteria=no#p2111=&p2105=&p2106=&p979=&p2954=&p2120=&o4=
