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Researchers Submit Patent Application, "System for Perceived Enhancement and Restoration of Compressed Audio Signals", for Approval

June 17, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor Soulodre, Gilbert Arthur Joseph (Kanata, CA), filed on March 15, 2013, was made available online on June 5, 2014.

The patent's assignee is Harman International Industries, Incorporated.

News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates to audio signal processing and more particularly to audio signal enhancement and restoration.

"Compressed audio signals are signals which have undergone some form of data compression by a perceptual audio codec. Perceptual audio codecs reduce the amount of data used to store, transfer, or transmit an audio signal by discarding components of the audio signal that are perceived to be less audible or less perceptually important. The data compression process often introduces undesirable audible differences between the original (uncompressed) audio signal and the compressed audio signal. Different perceptual audio codecs may employ different strategies for discarding portions of the original audio signal, but the perceived characteristics of the audible differences are typically similar."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "A system for perceived enhancement and restoration of compressed audio signals includes a Signal Enhancer system, which modifies a compressed audio signal such that signal components and characteristics which may have been discarded or altered in the compression process are perceived to be enhanced or restored in the processed output signal. Some aspects of the Signal Enhancer include that; it may extend the bandwidth of a compressed audio signal; it may restore missing or lost in-band signal harmonics; it may enhance transients; it may restore dry signal components; it may restore reverb signal components; it may restore masked signal components; and it may phase-align harmonic signal components. In addition, the Signal Enhancer may operate on individual spatial slices originating from a stereo or multi-channel audio signal. The Signal Enhancer may also operate on the Mid-Side components of a stereo signal.

"Other systems, methods, features and advantages will be, or will become, apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the following claims.

BRIEF DESCRIPTION OF THE DRAWINGS

"The system may be better understood with reference to the following drawings and description. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. Moreover, in the figures, like referenced numerals designate corresponding parts throughout the different views.

"FIG. 1 is a block diagram that includes an example Signal Enhancer system used in conjunction with a perceptual audio encoder and decoder.

"FIG. 2 is a block diagram that includes an example of a perceptual audio decoder integrated into the Signal Enhancer system.

"FIG. 3 is a block diagram of an example of the Signal Enhancer system.

"FIG. 4 is a block diagram of an example of the Signal Enhancer system operating on Mid-Side portions of a stereo signal.

"FIG. 5 is a block diagram of an example of separate Signal Enhancer modules operating on individual spatial slices of an audio signal.

"FIG. 6 depicts the components of an example impulse response with representation of block-based decomposition.

"FIG. 7 is an example block diagram of the Reverb Fill module illustrated in FIG. 3.

"FIG. 8 is an example estimate of sample components of an input reverberation series of samples at a given frequency.

"FIG. 9 is an example block diagram of the Signal Quality Analyzer, the Treatment Level Adjuster, and the Display Module.

"FIG. 10 is an example display of an output signal with bandwidth enhancement signal treatment.

"FIGS. 11a and 11b depict example spectral views (frequency-domain) to illustrate compression by the Signal Enhancer system.

"FIGS. 12a and 12b depict example spectral views to illustrate transient enhancement by the Signal Enhancer system.

"FIG. 13 is an example computing system."

For additional information on this patent application, see: Soulodre, Gilbert Arthur Joseph. System for Perceived Enhancement and Restoration of Compressed Audio Signals. Filed March 15, 2013 and posted June 5, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1028&p=21&f=G&l=50&d=PG01&S1=20140529.PD.&OS=PD/20140529&RS=PD/20140529

Keywords for this news article include: Information Technology, Information and Data Compression, Harman International Industries Incorporated.

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Source: Information Technology Newsweekly


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