A low-complexity circuit for on-sensor compression is presented. The proposed circuit achieves complexity savings by combining a single-slope analog-to-digital converter with a Golomb-Rice entropy encoder and by implementing a low-complexity adaptation rule. The adaptation rule monitors the output codewords and minimizes their length by incrementing or decrementing the value of the Golomb-Rice coding parameter k. Its hardware implementation is one order of magnitude lower than existing adaptive algorithms. The compression circuit has been fabricated using a 0.35 μm CMOS technology and occupies an area of 0.0918 mm 2. Test measurements confirm the validity of the design.
- Data compression
- On-sensor computation
- Source coding
ASJC Scopus subject areas
- Electrical and Electronic Engineering