News Column

Patent Issued for Audio Processing System

July 22, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Princeton Technology Corporation (Hsin Tien, Taipei County, TW) has been issued patent number 8774427, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Shih, Cheng-Ming (Taipei, TW); Chen, Cheng-Lin (Taipei, TW).

This patent was filed on January 12, 2012 and was published online on July 8, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "The invention relates to audio processing systems and particularly to audio processing systems with USB controllers.

"In general, a USB control chip is utilized in personal computers to play voice or music data by external audio processing systems. The USB control chip controls a USB controller to transmit voice or music data from the personal computer to the external audio processing system via a USB connection port. In conventional techniques, an audio processing control chip is required to control the external audio processing system to process the received voice and music data. The processed voice and music data is lastly played by a loudspeaker. The conventional technique of playing voice or music data stored in a personal computer, however, requires two separate control chips, the USB control chip and the audio processing control chip, that occupy a large circuit area. An important topic for those skilled in the Art is reducing overall size of the circuit.

"Because the current market trend is towards smaller sized products, it is desirable to develop smaller sized and more efficient audio processing systems."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The invention provides audio processing systems integrating a USB interface with the audio amplifier.

"In an embodiment of the invention, an audio processing system is disclosed and comprises an audio processor and an audio amplifier. The audio processor comprises at least one gain control circuit and at least one operational amplifier, and receives a data signal to generate a processed signal. The gain control circuit generates a gain signal according to a volume control signal and a reference signal. The operational amplifier couples to the gain control circuit, and amplifies the data signal by the gain signal to generate the processed signal. The audio amplifier couples to the audio processor, and amplifies the processed signal to generate an amplified signal.

"In some embodiments, the audio processing system further comprises at least one loudspeaker. The amplified signal is transmitted to the loudspeaker and played by the loudspeaker.

"The above and other advantages will become more apparent with reference to the following description taken in conjunction with the accompanying drawings."

For the URL and additional information on this patent, see: Shih, Cheng-Ming; Chen, Cheng-Lin. Audio Processing System. U.S. Patent Number 8774427, filed January 12, 2012, and published online on July 8, 2014. Patent URL:

Keywords for this news article include: Princeton Technology Corporation.

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Source: Journal of Technology

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