Abstract: A variable length encoding (VLE) device of an image compression system is suitable for encoding transformed and quantized block image signals. The VLE device includes a plurality of encoding modules, for performing VLE on the block image signals; and a selection module (VLE module start controller), for selecting a number of the encoding modules in turn to encode the block image signals. The encoding modules are configured for parallel processing, and an operating frequency of each of the encoding modules is a fractional frequency of a throughput rate of the image compression system. The VLE device is not affected by the time consumed by the VLE in the image compression process, and enables the entire image compression system to operate as desired and achieve the required throughput rate.

Abstract: A variable length encoding (VLE) device of an image compression system is suitable for encoding transformed and quantized block image signals. The VLE device includes a plurality of encoding modules, for performing VLE on the block image signals; and a selection module (VLE module start controller), for selecting a number of the encoding modules in turn to encode the block image signals. The encoding modules are configured for parallel processing, and an operating frequency of each of the encoding modules is a fractional frequency of a throughput rate of the image compression system. The VLE device is not affected by the time consumed by the VLE in the image compression process, and enables the entire image compression system to operate as desired and achieve the required throughput rate.

Abstract: A high performance Radio Frequency Identification (RFID) system and the operating method thereof. The RFID system includes a reader, a plurality of passive tags, and at least one local reader to communicate with nearby passive tags and further forward results to the reader. A repeater tag or a semi-active tag can serve as a local reader. An operating method of the high performance RFID system, a repeater tag operating method, a semi-active tag electric power detecting method, and an operating method for searching for no electric power tags are further provided.