Real-time detection and preservation of speech onset in a signal
July 28, 2028. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTime assignment speech interpolation communication system with variable delays Speech analysis/synthesis system with silence suppression Speech coding transmission equipment System for controlling voice speed of an input signal Speech detection device for the detection of speech end points based on variance of frequency band limited energy Low rate multi-mode CELP codec that encodes line SPECTRAL frequencies utilizing an offset Audio reproducing apparatus having voice speed converting function Voice recognition and voice response apparatus using speech period start point and termination point Method and apparatus for synchronizing digital speech communications Voice and data multiplexing system and recording medium having a voice and data multiplexing program recorded thereon InventorsAssigneeApplicationNo. 12181159 filed on 07/28/2008US Classes:704/215Silence decisionExaminersPrimary: Lerner, MartinAttorney, Agent or FirmInternational ClassesG10L 11/02G10L 21/04 AbstractA “speech onset detector” provides a variable length frame buffer in combination with either variable transmission rate or temporal speech compression for buffered signal frames. The variable length buffer buffers frames that are not clearly identified as either speech or non-speech frames during an initial analysis. Buffering of signal frames continues until a current frame is identified as either speech or non-speech. If the current frame is identified as non-speech, buffered frames are encoded as non-speech frames. However, if the current frame is identified as a speech frame, buffered frames are searched for the actual onset point of the speech. Once that onset point is identified, the signal is either transmitted in a burst, or a time-scale modification of the buffered signal is applied for compressing buffered frames beginning with the frame in which onset point is detected. The compressed frames are then encoded as one or more speech frames. | |
