• OPUS High performance audio codec
• Group Synchronization for BLE
• OPUS Optimization
• Real Time Multimedia Embedded Systems
• Bluetooth Low Energy (BLE)

The new era of the internet of things or just IoT is full of challenges principally in the case of Multimedia wireless devices due that they are affected by the common wireless vulnerabilities, protocol standardization, energy consumption, also hardware and software limitations.

Two crucial issues associated with multimedia wireless embedded systems have been considered in this thesis. (1) Explore low-level DSP and SIMD mechanism of common middle-class hardware architectures to improve the audio stream quality for constraining devices based on ARMv7E-M architecture specification. On this thesis is used a highly versatile audio codec known as OPUS for compress audio frames. (2) Subsequently, it is desirable an efficient audio frame transmission regarding real-time performance, scheduling and robustness to achiever group synchronization for Bluetooth Low Energy (BLE) applications which is a novel solution concerning private patterns well reported in the literature.

There are several reasons for what this work is relevant at the eyes of the BLE 4.x standard. First than all, because it does not support audio or synchronization facilities and it is something high demanded by many multimedia applications. With this project, we introduce a highly versatile audio codec to archive high-quality audio transmission. Additionally, due to the adaptation of two synchronization protocols to achieve group synchronization, it could be considered as an attractive contribution to future releases of the standard.