Real-Time Audio Transmission Using WiFi-Network

U sklopu diplomskog rada osmišljen je sustav za generiranje, prijenos, zaprimanje, reprodukciju i mjerenje signala. Radi detekcije izvora kašnjenja mijenjani su različiti parametri programskog okvira GStreamer, uz promjenu odašiljača i prijemnika. Kao odašiljačke komponente korišteni su LinkIt Smart 7688 i Carambola 2. Nadalje, kako bi se ispitao utjecaj driver-a korištene su sljedeće zvučne kartice: CM108, CM6307A, CM6317, Hama 7.1 surround i TLV320. Sa svrhom prijamnika korišteni su HP Pro- Book 4520s i HP ProBook 4540s. GStreamer je korišten za zaprimanje, prijenos i reprodukciju audio signala generiranog od strane Arduino Uno mikrokontrolera, koji se također koristi kao platforma za mjerenje latencije. Signal je uspješno prenesen WiFi mrežom i reproduciran na dva prijamnika istovremeno.To accomplish the task of the project, a system for generating, transmitting, receiving, reproducing and measuring the signal has been set up. Various parameters of the GStreamer framework have been alternated, alongside with changing the receiver and transmitter, to locate the source of the signal latency. As transmitters, LinkIt Smart 7688 development board and Carambola 2 have been used. To verify the influence of drivers, CM108, CM6317, CM6030A, Hama 7.1 surround and TLV320 sound card have been introduced to both transmitter boards. On the receiver side HP ProBook 4520s and HP ProBook 4540s have been tested. To transfer audio signal generated by the Arduino Uno that is also being used as a platform to retrieve latency, a pipeline has been set up for capturing, transmitting signal over WiFi and playing it. Signal was successfully transmitted to both receivers simultaneously using WiFi network