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In our previous work, we presented a brief analysis of the performance of the code block segmentation procedure adopted by the 3GPP LTE Advanced (LTE-A) Standard as part of its physical layer channel coding scheme. Here, a detailed analysis of its performance is offered along with a new approach to the LTE-A code block segmentation procedure. Code block segmentation is a generic procedure applied before turbo encoding whose function is to fragment a large transport block (TB) into smaller code blocks, reducing the decoding latency of turbo decoders (Sun et al. in Integr VLSI J 44(4): [305][306][307][308][309][310][311][312][313][314][315] 2011). Analysis showed that only 39 % of all TBs need segmentation. Results based on two different architectures, one focused on a digital signal processors and the other on an field programmable gate array are compared and discussed. A new approach for code block segmentation is presented. This new approach exhibits a speed up of more than 83 times over previous and new approaches presented here.