Patent ID: 7885422

Claim:
A digital audio device comprising: a communications processor; an applications processor; an audio codec; a wireless codec; a first bidirectional digital audio bus connecting the applications processor to the audio codec; a first portion of a second bidirectional digital audio bus connecting the communications processor to the audio codec; and a second portion of the second bidirectional digital audio bus, separable from the first portion, connecting the wireless codec to one of the audio codec and the applications processor, whereby a digital audio signal received by the communications processor in a digital telephony call may be passed via (i) the first portion of the second bidirectional digital audio bus, (ii) the audio codec and (iii) the first bidirectional digital audio bus to the applications processor while a separate signal is passed to the wireless codec via the second portion of the second bidirectional digital audio bus, said communications processor being arranged to receive a first digital audio signal in a digital telephony call and pass it to the audio codec via the first portion of the second bidirectional digital audio bus, said applications processor being arranged to record and retrieve stored audio files and thereby to receive a second digital audio signal which is not in a telephony call, and to pass the second digital audio signal to the audio codec via the first bidirectional digital audio bus, said audio codec being arranged to convert digital audio signals into analogue audio signals and provide said analogue audio signals to a sound transducer, and being arranged to mix the first and second digital audio signals digitally to form a mixed digital audio signal, said wireless codec being arranged to receive the mixed digital audio signal via the second portion of the second bidirectional digital audio bus and to transmit the mixed digital audio signal wirelessly to another device, and being arranged to receive a third digital audio signal wirelessly from said other device and pass it to the communications processor via the first and second portions of the second bidirectional digital audio bus, and the communications processor being arranged to transmit the third digital audio signal in the digital telephony call, wherein the audio codec comprises means for adjusting the sample rate of one of the first and second digital signals before they are mixed.