SoC for Capsule Endoscope

TAn application specific SoC with bidirectional wireless communication for the wireless capsule endoscope system is presented in this chapter. The SoC has an integrated ultra-low-power transceiver featured with asymmetrical data rate (3Mbps transmitting and 64kbps receiving). A dedicated ARQ scheme is designed to maintain an adequately low BER for data transmission. A near-lossless image compressor is integrated to improve the system efficiency. A capsule endoscope built using this SoC can transmit 480 × 480 pixel images at a frame rate of up to 3fps. The bi-directional link also renders the capability of re-configuring the capsule working inside the human body.