Sankaran Panchapagesan is a notable inventor based in Mountain View, CA, with a remarkable portfolio of 8 patents. His work primarily focuses on advancements in speech recognition and wakeword detection technologies.

Latest Patents

One of his latest patents is titled "Monophone-based background modeling for wakeword detection." This innovative approach utilizes an explicit representation of non-wakeword speech through subword units, such as phonetic monophones. These units do not necessarily occur in the wakeword but broadly represent general speech. The subword units are organized in a 'background' model that competes with the wakeword model during runtime. This competition reduces the likelihood of falsely declaring a wakeword when the input aligns well with the background model. Additionally, a Hidden Markov Model (HMM) may be employed to identify potential occurrences of the wakeword, with features derived from segments of the input corresponding to the subword units. A secondary classifier processes these features to determine whether the wakeword has occurred.

Another significant patent is "Trigger word detection using neural network waveform processing." This method enhances speech recognition, particularly in trigger word detection, by implementing fixed feature extraction from waveform samples using a neural network. Instead of traditional methods like computing Log Frequency Band Energies (LFBEs), a convolutional neural network is utilized. In some cases, this neural network processing is combined with a trained secondary classification that leverages phonetic segmentation to identify possible trigger word occurrences.

Career Highlights

Sankaran has contributed his expertise to several prominent companies, including Amazon Technologies, Inc. and Storz Endoskop Produktions GmbH. His work in these organizations has significantly advanced the field of speech recognition technology.

Collaborations

Throughout his career, Sankaran has collaborated with notable professionals, including Arindam Mandal and Bjorn Hoffmeister. These collaborations have fostered innovation and development in their respective fields.

Conclusion

Sankaran Panchapagesan's contributions to speech recognition and wakeword detection technologies exemplify his innovative spirit and dedication to advancing the field. His patents reflect a deep understanding of complex algorithms and their practical applications in modern technology.

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