Asynchronous Bit-stream Compression (ABC)

Asynchronous signaling is used for high-speed data communication in large Systems-on-Chip in. The bandwidth limitations of serial link dictate a need for real-time compression techniques. In this paper we propose a new technique of Asynchronous Bit-stream Compression (ABC), based on Level Encoded Dual-Rail protocol. The ABC method is based on transitions added to LEDR protocol which allow simple identification of the compression code and ease its separate treatment in the receiver. This compression allows a significant saving in the transmission time and power without losing data. The concept of ABC is described in this paper together with the proposed architecture of its hardware components. Simulations results are presented for several data patterns with various differentiation rates. Application of ABC results in reduction of transmission time by 9% to 54% depending on type of source data.