Audio Device Digital Bus Segmentation for Simultaneous Telephony and Music
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Solution Overview
Problem
In audio convergence devices like smartphones, the need for shared audio transducer resources and separate processing requirements for telephony and music applications limits system functionality due to the demand on the shared audio data bus, which restricts the ability to perform multiple audio tasks simultaneously.
Innovation Solution
A digital audio bus architecture with a pass device that allows the bus to operate in two modes: divided and unitary, enabling simultaneous communication between different audio processing components without interference, thereby reducing the number of buses required and allowing for more miniaturization and flexible audio applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a shared audio data bus is used to reduce the number of conductors, then device size and cost are reduced, but the ability to perform multiple audio tasks simultaneously is limited
Solution Approach 1:
The bus is segmented into multiple sections using pass devices (resistors) that can divide the bus into isolated segments. This allows different audio processing components to communicate simultaneously on different bus sections without interference, enabling multiple audio tasks to proceed in parallel while still using a shared physical bus structure.
Solution Approach 2:
The bus architecture dynamically switches between unified and segmented modes based on communication requirements. The pass devices can be configured to connect or isolate bus sections as needed, allowing the system to adapt its bus topology dynamically to support different audio application scenarios.
2Reliability
If separate processors are used for telephony and music applications, then processing requirements are met, but the demand on the shared audio data bus increases
Solution Approach 1:
The bus is divided into separate sections that can be independently used by different processors. This segmentation reduces contention on the shared bus by providing dedicated communication paths for telephony and music applications, thereby reducing overall bus demand while maintaining separate processing capabilities.
3Productivity
If the bus is divided into sections, then simultaneous communications are enabled, but the number of conductors increases
Solution Approach 1:
Multiple bus sections are merged into a single shared physical bus structure. The pass devices enable logical segmentation of the bus into multiple sections that can operate independently, allowing simultaneous communications while avoiding the need for completely separate physical buses for each section.
Data Source
AI summary
The present invention provides a digital bus circuit comprising: a bus conductor having two sections each connected to a pass circuit, each bus section being connected to two bus interfaces for respective circuits; at least three of the bus interfaces comprising a tri-state output buffer having a tri-state mode and one or more logic output modes; wherein in a unitary bus mode the tri-state output buffers are arranged such that only one of said output buffers is not in a tri-state mode, and the pass circuit is arranged to substantially couple said bus sections; and wherein in a dual bus mode the tri-state output buffers are arranged such that only one of the output buffers connected to each bus section is not in a tri-state mode, and wherein the pass circuit is arranged to substantially isolate said bus sections.