Abstract: A smart diaper sensor, which may be disposed inside a diaper, and may include a sensing element and a wireless RF circuit. The wireless RF circuit may include a transmitter and a wake-up receiver. The wake-up receiver may receive a wake-up signal transmitted from a backend platform to wake up the transmitter. The sensing element may sense the environmental status inside the diaper to generate a sensing signal. The transmitter may receive the sensing signal, and then transmit the sensing signal to the backend platform.

Abstract: The present invention provides method and apparatus of digital video stream decoding. At least one compressed bit stream and decoded block pixels are saved in a storage device for comparing to a target block to determine whether one of previously decoded and saved blocks can be used to represent a target block. A lossless compression mechanism is applied to reduce the amount of pixel data during storing the decoded block pixels. A lossy method is applied in decoding the video stream if a sum of weighted differences of DCT coefficients between the closet block and a target block is less than a predetermined threshold.