Portable wireless telephony device
AssigneeWolfson Microelectronics plc
InventorDavid Sinai
Life of this patent
Estimating the term…
Abstract
The present invention provides an audio codec for converting digital audio signals to analogue audio signals, the audio codec comprising: two digital audio bus interfaces for coupling to respective digital audio buses; a digital-only signal path between the two digital audio bus interfaces, such that no analogue processing of the audio signals occurs in the digital-only signal path.
Claims31
A portable wireless telephony device comprising:
- a communications processor for processing a telephony call;
- an applications processor for processing digital audio signals;
- a wireless codec for wirelessly communicating audio data with a wireless peripheral device;
- and
- an audio codec for converting digital audio signals to analog audio signals, the audio codec comprising
- first, second and third duplex digital audio bus interfaces for coupling to circuits via respective duplex digital audio buses or bus sections;
- and
- a digital-only signal path between the first and second digital audio bus interfaces usable to transmit digital audio signals from one of the first and second digital audio bus interfaces to the other without analog processing of the transmitted digital audio signals in the digital-only path,
- wherein said communications processor, said applications processor and said wireless codec are each coupled to a respective one of said digital audio bus interfaces.
A method of operating a portable wireless telephony device, said wireless telephony device comprising an audio codec suitable for converting digital audio signals to analog audio signals and a communications processor for processing a telephony call, an applications processor for processing digital audio signals and a wireless codec for wirelessly communicating audio data with a wireless peripheral device,
- wherein the audio codec comprises:
- first, second and third duplex digital audio bus interfaces;
- and a plurality of circuit elements including a digital-to-analog converter and an analog-to-digital converter;
- and switching means controllable to couple a selected one or ones of the circuit elements between the digital audio bus interfaces,
- wherein said communications processor, said applications processor and said wireless codec are each coupled to a respective one of said digital audio bus interfaces,
- the method comprising controlling the switching means so as to provide a digital-only signal path for the audio signals between the first and second of the digital audio bus interfaces, such that no analog processing of audio signals occurs in the digital-only signal path.
Dependencies are inferred from the claim text.