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Sample rate converter with selectable sampling rate and timing reference

a sampling rate converter and sampling rate technology, applied in the direction of code conversion, pulse technique, instruments, etc., can solve the problem of less than optimal increase of feature sets

Inactive Publication Date: 2007-06-14
NORTH STAR INNOVATIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution enhances the interoperability of FM receivers with digital audio processing ICs by providing adaptable sample rate conversion, ensuring compatibility with diverse audio formats and devices, thereby improving the functionality of handheld audio systems.

Problems solved by technology

While digital audio players / recorders are increasing their feature sets, the increase in feature sets has been done in a less than optimal manner.

Method used

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  • Sample rate converter with selectable sampling rate and timing reference
  • Sample rate converter with selectable sampling rate and timing reference
  • Sample rate converter with selectable sampling rate and timing reference

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Embodiment Construction

[0018]FIG. 1 is a schematic block diagram of a handheld audio system 10 that includes a radio signal decoder integrated circuit (IC) 12 and a digital audio processing integrated circuit (IC) 14. The digital audio processing integrated circuit 14 includes a processing module 13, memory 15, and a DC-DC converter 17. The processing module 13 may be a single processing device or a plurality of processing devices. Such a processing device may be a microprocessor, micro-controller, digital signal processor, microcomputer, central processing unit, field programmable gate array, programmable logic device, state machine, logic circuitry, analog circuitry, digital circuitry, and / or any device that manipulates signals (analog and / or digital) based on operational instructions. The memory 15 may be a single memory device or a plurality of memory devices. Such a memory device may be a read-only memory, random access memory, volatile memory, non-volatile memory, static memory, dynamic memory, flas...

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Abstract

A sample rate converter includes an up-conversion module, a linear interpolator module, and a parameter control module. The up-conversion module is operable to convert a first data rate to a second data rate of a data signal. The linear interpolator module is operable to receive the data signal at the second data rate and to produce therefrom a data signal at a desired rate based on at least one parameter. The parameter control module is operable to produce the at least one parameter based on the desired rate.

Description

[0001] This invention relates generally to portable handheld digital audio systems and more particularly to sample rate conversion for components therein. DESCRIPTION OF RELATED ART [0002] As is known, handheld digital audio systems are becoming very popular. Such systems include digital audio players / recorders that record and subsequently playback MP3 files, WMA files, etc. Such digital audio players / recorders may also be used as digital dictaphones and file transfer devices. Further expansion of digital audio players / recorders includes providing a frequency modulation (FM) radio receiver such that the device offers FM radio reception. [0003] While digital audio players / recorders are increasing their feature sets, the increase in feature sets has been done in a less than optimal manner. For instance, with the inclusion of an FM receiver in a digital audio player / recorder, the FM receiver is a separate integrated circuit from the digital audio player / recorder chip set, or IC. As suc...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03M7/00
CPCH03H17/0628
Inventor HENDRIX, JON DAVIDMAY, MICHAEL R.
Owner NORTH STAR INNOVATIONS