A Systematic Approach for Synthesizing VLSI Architectures of Lifting-Based Filter Banks and Transforms

摘要

The lifting scheme has become an important tool for designing filter banks and transforms of digital signal processing. Recently, the conventional lifting scheme that concerns the construction of 2-channel filter banks has been extended to $M$-channel filter banks $(M>2)$, bringing up the desirable properties of the lifting scheme to a broader range of applications. Many hand-crafted lifting-based VLSI architectures exist, which mostly concentrate on a single and specific target application having fixed data throughput and resource consumption. However, the reusability of such architectures is limited due to the lack of scalability. To overcome this issue, we present a design methodology for automatic synthesis of VLSI architectures suitable for arbitrary lifting-based $M$-channel filter banks and transforms. The proposed methodology enables high parameterizability in terms of data throughput, resource consumption, and arithmetic precision for the generated architectures. The concept of parameterizing design elements is important for modern system-on-chip design, since it features design space exploration and increases reusability. The proposed methodology is implemented as a high-level compilation tool that generates VLSI architectures at the register transfer level. We present results on the implementation of different architectures that were generated by our tool.