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478 results about "Transition state" patented technology

The transition state of a chemical reaction is a particular configuration along the reaction coordinate. It is defined as the state corresponding to the highest potential energy along this reaction coordinate. It is often marked with the double dagger ‡ symbol.

Scalable and embedded codec for speech and audio signals

InactiveUS7272556B1Improve signal reconstruction accuracyImprove reconstruction accuracySpeech analysisMultiple modesAudio signal flow
A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and/or bit rates. The analyzer of the system divides the input signal in different portions, at least one of which carries information sufficient to provide intelligible reconstruction of the input signal. The analyzer also encodes separate information about other portions of the signal in an embedded manner, so that a smooth transition can be achieved from low bit-rate to high bit-rate applications. Accordingly, communication devices operating at different sampling rates and/or bit-rates can extract corresponding information from the output bit stream of the analyzer. In the present invention embedded information generally relates to separate parameters of the input signal, or to additional resolution in the transmission of original signal parameters. Non-linear techniques for enhancing the overall performance of the system are also disclosed. Also disclosed is a novel method of improving the quantization of signal parameters. In a specific embodiment the input signal is processed in two or more modes dependent on the state of the signal in a frame. When the signal is determined to be in a transition state, the encoder provides phase information about N sinusoids, which the decoder end uses to improve the quality of the output signal at low bit rates.
Owner:ALCATEL LUCENT SAS

Scalable and embedded codec for speech and audio signals

A system and method for processing of audio and speech signals is disclosed, which provide compatibility over a range of communication devices operating at different sampling frequencies and / or bit rates. The analyzer of the system divides the input signal in different portions, at least one of which carries information sufficient to provide intelligible reconstruction of the input signal. The analyzer also encodes separate information about other portions of the signal in an embedded manner, so that a smooth transition can be achieved from low bit-rate to high bit-rate applications. Accordingly, communication devices operating at different sampling rates and / or bit-rates can extract corresponding information from the output bit stream of the analyzer. In the present invention embedded information generally relates to separate parameters of the input signal, or to additional resolution in the transmission of original signal parameters. Non-linear techniques for enhancing the overall performance of the system are also disclosed. Also disclosed is a novel method of improving the quantization of signal parameters. In a specific embodiment the input signal is processed in two or more modes dependent on the state of the signal in a frame. When the signal is determined to be in a transition state, the encoder provides phase information about N sinusoids, which the decoder end uses to improve the quality of the output signal at low bit rates.
Owner:ALCATEL LUCENT SAS

Monitoring method for vertical milling cutting vibration

The invention provides a monitoring method for vertical milling cutting vibration. The monitoring method comprises the steps that in the process of acceleration signal obtaining, an acceleration sensor installed on a main shaft of a vertical milling cutting machine is used for collecting acceleration signals produced in the vertical milling cutting process, the acceleration signals are shown as the formula: X=[x(1), x (2),..., x(n)], n represents the signal length, and the acceleration signals comprise the stable state signals, the transition state signals and the vibration state signals, all of which are located in different frequency bands. According to the monitoring method for vertical milling cutting vibration, the acceleration signals are utilized as reflecting signals of cutting vibration, an energy ration coefficient and a singularity spectrum entropy coefficient are calculated based on the signals to serve as a training sample of a BP neural network, and a vibration monitoring result is finally obtained. Compared with a common vibration detecting method, the sign of the cutting vibration can be found earlier, precise recognition is achieved before sharp vibration, and irretrievable harm caused by sharp vibration to workpieces and machine tool components is prevented.
Owner:CHANGZHOU COLLEGE OF INFORMATION TECH
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