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Class Information
Number: 704/221
Name: Data processing: speech signal processing, linguistics, language translation, and audio compression/decompression > Speech signal processing > For storage or transmission > Pattern matching vocoders
Description: Subject matter wherein speech

Sub-classes under this class:

Class Number Class Name Patents
704/223 Excitation patterns 573
704/222 Vector quantization 523

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8706480 Audio encoder for encoding an audio signal having an impulse-like portion and stationary portion, encoding methods, decoder, decoding method, and encoding audio signal Apr. 22, 2014
8706488 Methods and apparatus for formant-based voice synthesis Apr. 22, 2014
8676575 Dialed digits based vocoder assignment Mar. 18, 2014
8620645 Non-causal postfilter Dec. 31, 2013
8620646 System and method for tracking sound pitch across an audio signal using harmonic envelope Dec. 31, 2013
8595017 Audio encoding method and device Nov. 26, 2013
8595019 Audio coder/decoder with predictive coding of synthesis filter and critically-sampled time aliasing of prediction domain frames Nov. 26, 2013
8571226 Automatic polarity adaptation for ambient noise cancellation Oct. 29, 2013
8571852 Postfilter for layered codecs Oct. 29, 2013
8565127 Voice-activity detection based on far-end and near-end statistics Oct. 22, 2013
8560328 Encoding device, decoding device, and method thereof Oct. 15, 2013
8539362 Method and system for inserting advertisements in unified messaging solutions Sep. 17, 2013
8521520 Handoffs between different voice encoder systems Aug. 27, 2013
8515767 Technique for encoding/decoding of codebook indices for quantized MDCT spectrum in scalable speech and audio codecs Aug. 20, 2013
8502708 Encoding method and decoding method, and devices, program and recording medium for the same Aug. 6, 2013
8504364 Differential dynamic content delivery with text display in dependence upon simultaneous speech Aug. 6, 2013
8494849 Method and apparatus for transmitting speech data to a remote device in a distributed speech recognition system Jul. 23, 2013
8489392 System and method for modeling speech spectra Jul. 16, 2013
8484020 Determining an upperband signal from a narrowband signal Jul. 9, 2013
8463601 Sending speech packets with same and complementary subsets of fixed codebook pulses Jun. 11, 2013
8457962 Remote audio surveillance for detection and analysis of wildlife sounds Jun. 4, 2013
8452588 Encoding device, decoding device, and method thereof May. 28, 2013
8446301 Methods and devices for coding and decoding the position of the last significant coefficient May. 21, 2013
8447592 Methods and apparatus for formant-based voice systems May. 21, 2013
8447597 Audio encoding device, audio decoding device, audio encoding method, and audio decoding method May. 21, 2013
8442818 Apparatus and method for adaptive audio coding May. 14, 2013
8436754 Encoding and decoding method and device May. 7, 2013
8438020 Vector quantization apparatus, vector dequantization apparatus, and the methods May. 7, 2013
8428953 Audio decoding device, audio decoding method, program, and integrated circuit Apr. 23, 2013
8422641 Distributed record server architecture for recording call sessions over a VoIP network Apr. 16, 2013
8417518 Voice recognition system, method, and program Apr. 9, 2013
8412519 Steganography in digital signal encoders Apr. 2, 2013
8411871 Echo cancellation Apr. 2, 2013
8401843 Method and device for coding transition frames in speech signals Mar. 19, 2013
8391373 Concealment of transmission error in a digital audio signal in a hierarchical decoding structure Mar. 5, 2013
8379819 Indexing recordings of telephony sessions Feb. 19, 2013
8380526 Method, device and system for enhancement layer signal encoding and decoding Feb. 19, 2013
8374852 Apparatus and method of code conversion and recording medium that records program for computer to execute the method Feb. 12, 2013
8370132 Distributed apparatus and method for a perceptual quality measurement service Feb. 5, 2013
8369549 Hearing aid system adapted to selectively amplify audio signals Feb. 5, 2013
8364475 Voice processing apparatus and voice processing method for changing accoustic feature quantity of received voice signal Jan. 29, 2013
8364476 Method and apparatus of communication Jan. 29, 2013
8358617 Enhanced conversion of wideband signals to narrowband signals Jan. 22, 2013
8355907 Method and apparatus for phase matching frames in vocoders Jan. 15, 2013
8352254 Fixed code book search device and fixed code book search method Jan. 8, 2013
8351706 Document extracting method and document extracting apparatus Jan. 8, 2013
8346544 Selection of encoding modes and/or encoding rates for speech compression with closed loop re-decision Jan. 1, 2013
8340960 Methods and apparatus for efficient vocoder implementations Dec. 25, 2012
8332220 Differential dynamic content delivery with text display in dependence upon simultaneous speech Dec. 11, 2012
8315860 Interoperable vocoder Nov. 20, 2012

1 2 3 4 5 6 7 8

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