| 摘要 |
The invention relates to a system for providing sound to at least one user (13), comprising: at least one audio signal source (17, 20, 25, 110A, 110B, 110C) for providing audio signals; a transmission unit (10) comprising a digital transmitter (28) for applying a digital modulation scheme in order to transmit the audio signals from the audio signal source via a wireless digital audio link (12); at least one receiver unit (14) for reception of audio signals from the transmission unit via the digital audio link, comprising at least two digital receivers (6 IA, 61B), each being connected to a common processing unit (74) and an antenna (38 A, 38B) and including a demodulator (58A, 58B) and a buffer (59A, 59B); means (42, 64, 82) for stimulating the hearing of the user according to audio signals supplied from the processing unit; wherein the wireless link is for transmitting the audio signals as audio data packets, each packet comprising a start frame delimiter (SFD), audio data and a frame check sequence (CRC), wherein each receiver is for receiving, verifying and buffering each of the audio data packets, and wherein the processing unit is adapted to read an audio data packet from the buffer of one of the receivers and, if the packet has been correctly received by that receiver, to flush the buffer of the other one(s) of the receivers and, if the packet has not been correctly received by that receiver, to read the audio data packet from the buffer of another one of the receivers. |
