Patent ID: 8649727

Claim:
A portable karaoke system comprising: a smart mobile phone; a transmitting end expansion device installed on the smart mobile phone to form a transmitting end karaoke apparatus, wherein the transmitting end expansion device includes a first interface port electrically connected to the smart mobile phone for receiving vocal signals transmitted by the smart mobile phone, an echo controller electrically connected to the first interface port for performing echo processing on the vocal signals, a first wireless module electrically connected to the echo controller for receiving echo-processed vocal signals from the echo controller, and a first microprocessor electrically connected to the first interface port, the echo controller and the first wireless module to perform coordination and control on the first interface port, the echo controller and the first wireless module for transmitting the echo-processed vocal signals via the first wireless module; a mobile device having a plurality of song files saved therein; and a receiving end expansion device installed on the mobile device to form a receiving end karaoke apparatus, wherein the receiving end expansion device includes a second interface port electrically connected to the mobile device for receiving music signals generated by the mobile device, a second wireless module for receiving the echo-processed vocal signals transmitted from the transmitting end expansion device, a key controller electrically connected to the second interface port for performing key tuning to the music signals, an audio mixer electrically connected to the second wireless module and the key controller for performing audio mixing on key-tuned music signals from the key controller and the echo-processed vocal signals from the second wireless module and outputting audio-mixed signals to an expansion device connected to the receiving end expansion device, and a second microprocessor electrically connected to the second interface port, the second wireless module, the key controller and the audio mixer to perform coordination and processing on the second interface port, the second wireless module, the key controller and the audio mixer.