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This paper describes the performance of ad-hoc wireless network on 2.4GHz band in the real buildings and homes. The communication module based on the IEEE802.15.4 standard was developed and installed into four kinds of buildings with different structures. The attenuation of the signal resulting from obstacles in the real world and the coexistence of 802.15.4 with other products of the same radio frequency band were evaluated.1.

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To solve recent pressing issues regarding satisfying numerous video codec standards and supporting "full-high-definition" (full-HD) (i.e., 1920 pixels by 1080 lines) video on different consumer devices, a multi-standard CODEC IP based on a heterogeneous multiprocessor architecture was developed. To achieve satisfactory performance with low power consumption, operation-specific processors were designed in regards to two types of processing: stream processing and pixel processing. The CODEC uses effectively several dedicated circuits for functions which are unsuitable for those processors. To design the CODEC, we developed a C-language model to check that the architecture worked correctly. The model was also used as a reference for verifying the RTL model. The CODEC can process full-HD videos formatted in H.264, MPEG-2, MPEG-4, and VC-1 at an operating frequency of 162 MHz.