CA2090160A1 - Rate loop processor for perceptual encoder/decoder - Google Patents

Rate loop processor for perceptual encoder/decoder

Info

Publication number
CA2090160A1
CA2090160A1 CA2090160A CA2090160A CA2090160A1 CA 2090160 A1 CA2090160 A1 CA 2090160A1 CA 2090160 A CA2090160 A CA 2090160A CA 2090160 A CA2090160 A CA 2090160A CA 2090160 A1 CA2090160 A1 CA 2090160A1
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CA
Canada
Prior art keywords
decoder
rate loop
loop processor
perceptual encoder
hearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2090160A
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French (fr)
Other versions
CA2090160C (en
Inventor
James David Johnston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25293693&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2090160(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2090160A1 publication Critical patent/CA2090160A1/en
Application granted granted Critical
Publication of CA2090160C publication Critical patent/CA2090160C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/665—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using psychoacoustic properties of the ear, e.g. masking effect

Abstract

In a perceptual audio coder, a method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing at a given frequency and the absolute threshold of hearing at the same frequency.
CA002090160A 1992-03-02 1993-02-23 Rate loop processor for perceptual encoder/decoder Expired - Lifetime CA2090160C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84481192A 1992-03-02 1992-03-02
US844,811 1992-03-02

Publications (2)

Publication Number Publication Date
CA2090160A1 true CA2090160A1 (en) 1993-09-03
CA2090160C CA2090160C (en) 1998-10-06

Family

ID=25293693

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002090160A Expired - Lifetime CA2090160C (en) 1992-03-02 1993-02-23 Rate loop processor for perceptual encoder/decoder

Country Status (5)

Country Link
US (2) US5627938A (en)
EP (1) EP0559348A3 (en)
JP (1) JP3263168B2 (en)
KR (1) KR970007663B1 (en)
CA (1) CA2090160C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7613603B2 (en) 2003-06-30 2009-11-03 Fujitsu Limited Audio coding device with fast algorithm for determining quantization step sizes based on psycho-acoustic model

Families Citing this family (161)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE40280E1 (en) 1988-12-30 2008-04-29 Lucent Technologies Inc. Rate loop processor for perceptual encoder/decoder
EP0559348A3 (en) 1992-03-02 1993-11-03 AT&T Corp. Rate control loop processor for perceptual encoder/decoder
JP3125543B2 (en) * 1993-11-29 2001-01-22 ソニー株式会社 Signal encoding method and apparatus, signal decoding method and apparatus, and recording medium
KR960003628B1 (en) * 1993-12-06 1996-03-20 Lg전자주식회사 Coding and decoding apparatus & method of digital signal
PL180441B1 (en) * 1994-03-31 2001-02-28 Arbitron Co Method of and apparatus for code detecting
KR970011727B1 (en) * 1994-11-09 1997-07-14 Daewoo Electronics Co Ltd Apparatus for encoding of the audio signal
EP0721257B1 (en) * 1995-01-09 2005-03-30 Daewoo Electronics Corporation Bit allocation for multichannel audio coder based on perceptual entropy
CN1110955C (en) * 1995-02-13 2003-06-04 大宇电子株式会社 Apparatus for adaptively encoding input digital audio signals from plurality of channels
DE19505435C1 (en) * 1995-02-17 1995-12-07 Fraunhofer Ges Forschung Tonality evaluation system for audio signal
US5956674A (en) * 1995-12-01 1999-09-21 Digital Theater Systems, Inc. Multi-channel predictive subband audio coder using psychoacoustic adaptive bit allocation in frequency, time and over the multiple channels
DE19628292B4 (en) 1996-07-12 2007-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for coding and decoding stereo audio spectral values
EP0924962B1 (en) * 1997-04-10 2012-12-12 Sony Corporation Encoding method and device, decoding method and device, and recording medium
DE19730130C2 (en) 1997-07-14 2002-02-28 Fraunhofer Ges Forschung Method for coding an audio signal
US6263312B1 (en) 1997-10-03 2001-07-17 Alaris, Inc. Audio compression and decompression employing subband decomposition of residual signal and distortion reduction
US5913191A (en) * 1997-10-17 1999-06-15 Dolby Laboratories Licensing Corporation Frame-based audio coding with additional filterbank to suppress aliasing artifacts at frame boundaries
US6091773A (en) * 1997-11-12 2000-07-18 Sydorenko; Mark R. Data compression method and apparatus
US6037987A (en) * 1997-12-31 2000-03-14 Sarnoff Corporation Apparatus and method for selecting a rate and distortion based coding mode for a coding system
US6161088A (en) * 1998-06-26 2000-12-12 Texas Instruments Incorporated Method and system for encoding a digital audio signal
US6128593A (en) * 1998-08-04 2000-10-03 Sony Corporation System and method for implementing a refined psycho-acoustic modeler
GB9819920D0 (en) * 1998-09-11 1998-11-04 Nds Ltd Audio encoding system
US6961314B1 (en) 1998-10-30 2005-11-01 Broadcom Corporation Burst receiver for cable modem system
US7103065B1 (en) * 1998-10-30 2006-09-05 Broadcom Corporation Data packet fragmentation in a cable modem system
DE69939781D1 (en) * 1998-10-30 2008-12-04 Broadcom Corp CABLE MODEM SYSTEM
US6760316B1 (en) * 1998-10-30 2004-07-06 Broadcom Corporation Method and apparatus for the synchronization of multiple cable modem termination system devices
US6240379B1 (en) * 1998-12-24 2001-05-29 Sony Corporation System and method for preventing artifacts in an audio data encoder device
JP3739959B2 (en) * 1999-03-23 2006-01-25 株式会社リコー Digital audio signal encoding apparatus, digital audio signal encoding method, and medium on which digital audio signal encoding program is recorded
US6363338B1 (en) * 1999-04-12 2002-03-26 Dolby Laboratories Licensing Corporation Quantization in perceptual audio coders with compensation for synthesis filter noise spreading
GB2349054A (en) * 1999-04-16 2000-10-18 Nds Ltd Digital audio signal encoders
DE60035740T2 (en) * 1999-06-22 2007-12-06 Victor Company of Japan, Ltd., Yokohama Apparatus and method for encoding motion picture signals
JP3762579B2 (en) 1999-08-05 2006-04-05 株式会社リコー Digital audio signal encoding apparatus, digital audio signal encoding method, and medium on which digital audio signal encoding program is recorded
JP2001094433A (en) 1999-09-17 2001-04-06 Matsushita Electric Ind Co Ltd Sub-band coding and decoding medium
JP2001099718A (en) * 1999-09-30 2001-04-13 Ando Electric Co Ltd Data processing device of wavemeter and its data processing method
US6499010B1 (en) 2000-01-04 2002-12-24 Agere Systems Inc. Perceptual audio coder bit allocation scheme providing improved perceptual quality consistency
TW499672B (en) * 2000-02-18 2002-08-21 Intervideo Inc Fast convergence method for bit allocation stage of MPEG audio layer 3 encoders
BR0110724A (en) * 2000-05-15 2003-03-11 Unilever Nv Concentrated non-aqueous liquid detergent composition, and process for the preparation of a concentrated liquid detergent composition
JP4021124B2 (en) * 2000-05-30 2007-12-12 株式会社リコー Digital acoustic signal encoding apparatus, method and recording medium
US6778953B1 (en) * 2000-06-02 2004-08-17 Agere Systems Inc. Method and apparatus for representing masked thresholds in a perceptual audio coder
US7110953B1 (en) * 2000-06-02 2006-09-19 Agere Systems Inc. Perceptual coding of audio signals using separated irrelevancy reduction and redundancy reduction
US6678647B1 (en) * 2000-06-02 2004-01-13 Agere Systems Inc. Perceptual coding of audio signals using cascaded filterbanks for performing irrelevancy reduction and redundancy reduction with different spectral/temporal resolution
GB0115952D0 (en) * 2001-06-29 2001-08-22 Ibm A scheduling method and system for controlling execution of processes
US6732071B2 (en) * 2001-09-27 2004-05-04 Intel Corporation Method, apparatus, and system for efficient rate control in audio encoding
US7318026B2 (en) 2001-10-03 2008-01-08 Sony Corporation Encoding apparatus and method, decoding apparatus and method, and recording medium recording apparatus and method
US7240001B2 (en) * 2001-12-14 2007-07-03 Microsoft Corporation Quality improvement techniques in an audio encoder
US6934677B2 (en) * 2001-12-14 2005-08-23 Microsoft Corporation Quantization matrices based on critical band pattern information for digital audio wherein quantization bands differ from critical bands
US8401084B2 (en) * 2002-04-01 2013-03-19 Broadcom Corporation System and method for multi-row decoding of video with dependent rows
US20030215013A1 (en) * 2002-04-10 2003-11-20 Budnikov Dmitry N. Audio encoder with adaptive short window grouping
US20040162637A1 (en) 2002-07-25 2004-08-19 Yulun Wang Medical tele-robotic system with a master remote station with an arbitrator
US7299190B2 (en) * 2002-09-04 2007-11-20 Microsoft Corporation Quantization and inverse quantization for audio
US7502743B2 (en) 2002-09-04 2009-03-10 Microsoft Corporation Multi-channel audio encoding and decoding with multi-channel transform selection
EP2006840B1 (en) 2002-09-04 2012-07-04 Microsoft Corporation Entropy coding by adapting coding between level and run-length/level modes
JP4676140B2 (en) * 2002-09-04 2011-04-27 マイクロソフト コーポレーション Audio quantization and inverse quantization
EP1559101A4 (en) * 2002-11-07 2006-01-25 Samsung Electronics Co Ltd Mpeg audio encoding method and apparatus
KR100908117B1 (en) * 2002-12-16 2009-07-16 삼성전자주식회사 Audio coding method, decoding method, encoding apparatus and decoding apparatus which can adjust the bit rate
US6996763B2 (en) * 2003-01-10 2006-02-07 Qualcomm Incorporated Operation of a forward link acknowledgement channel for the reverse link data
US7650277B2 (en) * 2003-01-23 2010-01-19 Ittiam Systems (P) Ltd. System, method, and apparatus for fast quantization in perceptual audio coders
US8081598B2 (en) * 2003-02-18 2011-12-20 Qualcomm Incorporated Outer-loop power control for wireless communication systems
US8150407B2 (en) * 2003-02-18 2012-04-03 Qualcomm Incorporated System and method for scheduling transmissions in a wireless communication system
US7660282B2 (en) * 2003-02-18 2010-02-09 Qualcomm Incorporated Congestion control in a wireless data network
US8023950B2 (en) 2003-02-18 2011-09-20 Qualcomm Incorporated Systems and methods for using selectable frame durations in a wireless communication system
US8391249B2 (en) * 2003-02-18 2013-03-05 Qualcomm Incorporated Code division multiplexing commands on a code division multiplexed channel
US7505780B2 (en) * 2003-02-18 2009-03-17 Qualcomm Incorporated Outer-loop power control for wireless communication systems
US7286846B2 (en) * 2003-02-18 2007-10-23 Qualcomm, Incorporated Systems and methods for performing outer loop power control in wireless communication systems
US7155236B2 (en) 2003-02-18 2006-12-26 Qualcomm Incorporated Scheduled and autonomous transmission and acknowledgement
US20040160922A1 (en) 2003-02-18 2004-08-19 Sanjiv Nanda Method and apparatus for controlling data rate of a reverse link in a communication system
US7215930B2 (en) * 2003-03-06 2007-05-08 Qualcomm, Incorporated Method and apparatus for providing uplink signal-to-noise ratio (SNR) estimation in a wireless communication
US8705588B2 (en) * 2003-03-06 2014-04-22 Qualcomm Incorporated Systems and methods for using code space in spread-spectrum communications
US8477592B2 (en) * 2003-05-14 2013-07-02 Qualcomm Incorporated Interference and noise estimation in an OFDM system
US8489949B2 (en) 2003-08-05 2013-07-16 Qualcomm Incorporated Combining grant, acknowledgement, and rate control commands
SG120118A1 (en) * 2003-09-15 2006-03-28 St Microelectronics Asia A device and process for encoding audio data
WO2005027096A1 (en) 2003-09-15 2005-03-24 Zakrytoe Aktsionernoe Obschestvo Intel Method and apparatus for encoding audio
US7813836B2 (en) 2003-12-09 2010-10-12 Intouch Technologies, Inc. Protocol for a remotely controlled videoconferencing robot
US7460990B2 (en) * 2004-01-23 2008-12-02 Microsoft Corporation Efficient coding of digital media spectral data using wide-sense perceptual similarity
US6980933B2 (en) * 2004-01-27 2005-12-27 Dolby Laboratories Licensing Corporation Coding techniques using estimated spectral magnitude and phase derived from MDCT coefficients
DE102004009949B4 (en) * 2004-03-01 2006-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Device and method for determining an estimated value
US8077963B2 (en) 2004-07-13 2011-12-13 Yulun Wang Mobile robot with a head-based movement mapping scheme
JP2007004050A (en) * 2005-06-27 2007-01-11 Nippon Hoso Kyokai <Nhk> Device and program for encoding stereophonic signal
US7562021B2 (en) * 2005-07-15 2009-07-14 Microsoft Corporation Modification of codewords in dictionary used for efficient coding of digital media spectral data
US7693709B2 (en) * 2005-07-15 2010-04-06 Microsoft Corporation Reordering coefficients for waveform coding or decoding
US7630882B2 (en) * 2005-07-15 2009-12-08 Microsoft Corporation Frequency segmentation to obtain bands for efficient coding of digital media
US7684981B2 (en) * 2005-07-15 2010-03-23 Microsoft Corporation Prediction of spectral coefficients in waveform coding and decoding
US8225392B2 (en) * 2005-07-15 2012-07-17 Microsoft Corporation Immunizing HTML browsers and extensions from known vulnerabilities
US7599840B2 (en) * 2005-07-15 2009-10-06 Microsoft Corporation Selectively using multiple entropy models in adaptive coding and decoding
US7539612B2 (en) 2005-07-15 2009-05-26 Microsoft Corporation Coding and decoding scale factor information
US7565018B2 (en) * 2005-08-12 2009-07-21 Microsoft Corporation Adaptive coding and decoding of wide-range coefficients
US7933337B2 (en) * 2005-08-12 2011-04-26 Microsoft Corporation Prediction of transform coefficients for image compression
JP4454664B2 (en) 2005-09-05 2010-04-21 富士通株式会社 Audio encoding apparatus and audio encoding method
US9198728B2 (en) 2005-09-30 2015-12-01 Intouch Technologies, Inc. Multi-camera mobile teleconferencing platform
EP1953737B1 (en) 2005-10-14 2012-10-03 Panasonic Corporation Transform coder and transform coding method
US7831434B2 (en) 2006-01-20 2010-11-09 Microsoft Corporation Complex-transform channel coding with extended-band frequency coding
US7953604B2 (en) * 2006-01-20 2011-05-31 Microsoft Corporation Shape and scale parameters for extended-band frequency coding
US8190425B2 (en) * 2006-01-20 2012-05-29 Microsoft Corporation Complex cross-correlation parameters for multi-channel audio
US9185487B2 (en) 2006-01-30 2015-11-10 Audience, Inc. System and method for providing noise suppression utilizing null processing noise subtraction
US7769492B2 (en) * 2006-02-22 2010-08-03 Intouch Technologies, Inc. Graphical interface for a remote presence system
US7835904B2 (en) * 2006-03-03 2010-11-16 Microsoft Corp. Perceptual, scalable audio compression
FR2898443A1 (en) * 2006-03-13 2007-09-14 France Telecom AUDIO SOURCE SIGNAL ENCODING METHOD, ENCODING DEVICE, DECODING METHOD, DECODING DEVICE, SIGNAL, CORRESPONDING COMPUTER PROGRAM PRODUCTS
WO2007116809A1 (en) * 2006-03-31 2007-10-18 Matsushita Electric Industrial Co., Ltd. Stereo audio encoding device, stereo audio decoding device, and method thereof
US8849679B2 (en) 2006-06-15 2014-09-30 Intouch Technologies, Inc. Remote controlled robot system that provides medical images
US8184710B2 (en) * 2007-02-21 2012-05-22 Microsoft Corporation Adaptive truncation of transform coefficient data in a transform-based digital media codec
US9160783B2 (en) 2007-05-09 2015-10-13 Intouch Technologies, Inc. Robot system that operates through a network firewall
US7761290B2 (en) 2007-06-15 2010-07-20 Microsoft Corporation Flexible frequency and time partitioning in perceptual transform coding of audio
US8046214B2 (en) * 2007-06-22 2011-10-25 Microsoft Corporation Low complexity decoder for complex transform coding of multi-channel sound
US20090006081A1 (en) * 2007-06-27 2009-01-01 Samsung Electronics Co., Ltd. Method, medium and apparatus for encoding and/or decoding signal
US7885819B2 (en) * 2007-06-29 2011-02-08 Microsoft Corporation Bitstream syntax for multi-process audio decoding
CN101790757B (en) * 2007-08-27 2012-05-30 爱立信电话股份有限公司 Improved transform coding of speech and audio signals
US8249883B2 (en) * 2007-10-26 2012-08-21 Microsoft Corporation Channel extension coding for multi-channel source
US20090144054A1 (en) * 2007-11-30 2009-06-04 Kabushiki Kaisha Toshiba Embedded system to perform frame switching
US10875182B2 (en) 2008-03-20 2020-12-29 Teladoc Health, Inc. Remote presence system mounted to operating room hardware
US8179418B2 (en) 2008-04-14 2012-05-15 Intouch Technologies, Inc. Robotic based health care system
US8170241B2 (en) 2008-04-17 2012-05-01 Intouch Technologies, Inc. Mobile tele-presence system with a microphone system
US8179974B2 (en) 2008-05-02 2012-05-15 Microsoft Corporation Multi-level representation of reordered transform coefficients
US8325800B2 (en) 2008-05-07 2012-12-04 Microsoft Corporation Encoding streaming media as a high bit rate layer, a low bit rate layer, and one or more intermediate bit rate layers
US8379851B2 (en) 2008-05-12 2013-02-19 Microsoft Corporation Optimized client side rate control and indexed file layout for streaming media
US7925774B2 (en) 2008-05-30 2011-04-12 Microsoft Corporation Media streaming using an index file
US9193065B2 (en) 2008-07-10 2015-11-24 Intouch Technologies, Inc. Docking system for a tele-presence robot
US9842192B2 (en) 2008-07-11 2017-12-12 Intouch Technologies, Inc. Tele-presence robot system with multi-cast features
US8290782B2 (en) * 2008-07-24 2012-10-16 Dts, Inc. Compression of audio scale-factors by two-dimensional transformation
US8406307B2 (en) 2008-08-22 2013-03-26 Microsoft Corporation Entropy coding/decoding of hierarchically organized data
US8340819B2 (en) 2008-09-18 2012-12-25 Intouch Technologies, Inc. Mobile videoconferencing robot system with network adaptive driving
US8913668B2 (en) * 2008-09-29 2014-12-16 Microsoft Corporation Perceptual mechanism for the selection of residues in video coders
US8457194B2 (en) * 2008-09-29 2013-06-04 Microsoft Corporation Processing real-time video
US8265140B2 (en) 2008-09-30 2012-09-11 Microsoft Corporation Fine-grained client-side control of scalable media delivery
US8996165B2 (en) 2008-10-21 2015-03-31 Intouch Technologies, Inc. Telepresence robot with a camera boom
US8463435B2 (en) 2008-11-25 2013-06-11 Intouch Technologies, Inc. Server connectivity control for tele-presence robot
US9138891B2 (en) 2008-11-25 2015-09-22 Intouch Technologies, Inc. Server connectivity control for tele-presence robot
US8849680B2 (en) 2009-01-29 2014-09-30 Intouch Technologies, Inc. Documentation through a remote presence robot
CN101853663B (en) * 2009-03-30 2012-05-23 华为技术有限公司 Bit allocation method, encoding device and decoding device
US8897920B2 (en) 2009-04-17 2014-11-25 Intouch Technologies, Inc. Tele-presence robot system with software modularity, projector and laser pointer
US9055374B2 (en) * 2009-06-24 2015-06-09 Arizona Board Of Regents For And On Behalf Of Arizona State University Method and system for determining an auditory pattern of an audio segment
WO2011021238A1 (en) * 2009-08-20 2011-02-24 トムソン ライセンシング Rate controller, rate control method, and rate control program
US8384755B2 (en) 2009-08-26 2013-02-26 Intouch Technologies, Inc. Portable remote presence robot
US11399153B2 (en) 2009-08-26 2022-07-26 Teladoc Health, Inc. Portable telepresence apparatus
US9838784B2 (en) 2009-12-02 2017-12-05 Knowles Electronics, Llc Directional audio capture
US11154981B2 (en) 2010-02-04 2021-10-26 Teladoc Health, Inc. Robot user interface for telepresence robot system
US8670017B2 (en) 2010-03-04 2014-03-11 Intouch Technologies, Inc. Remote presence system including a cart that supports a robot face and an overhead camera
US8798290B1 (en) 2010-04-21 2014-08-05 Audience, Inc. Systems and methods for adaptive signal equalization
US9558755B1 (en) * 2010-05-20 2017-01-31 Knowles Electronics, Llc Noise suppression assisted automatic speech recognition
US10343283B2 (en) 2010-05-24 2019-07-09 Intouch Technologies, Inc. Telepresence robot system that can be accessed by a cellular phone
US10808882B2 (en) 2010-05-26 2020-10-20 Intouch Technologies, Inc. Tele-robotic system with a robot face placed on a chair
US9264664B2 (en) 2010-12-03 2016-02-16 Intouch Technologies, Inc. Systems and methods for dynamic bandwidth allocation
EP2668008A4 (en) 2011-01-28 2018-01-24 Intouch Technologies, Inc. Interfacing with a mobile telepresence robot
US9323250B2 (en) 2011-01-28 2016-04-26 Intouch Technologies, Inc. Time-dependent navigation of telepresence robots
WO2012128678A1 (en) * 2011-03-21 2012-09-27 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for damping of dominant frequencies in an audio signal
WO2012128679A1 (en) * 2011-03-21 2012-09-27 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for damping dominant frequencies in an audio signal
US10769739B2 (en) 2011-04-25 2020-09-08 Intouch Technologies, Inc. Systems and methods for management of information among medical providers and facilities
RU2648595C2 (en) 2011-05-13 2018-03-26 Самсунг Электроникс Ко., Лтд. Bit distribution, audio encoding and decoding
US20140139616A1 (en) 2012-01-27 2014-05-22 Intouch Technologies, Inc. Enhanced Diagnostics for a Telepresence Robot
US9098611B2 (en) 2012-11-26 2015-08-04 Intouch Technologies, Inc. Enhanced video interaction for a user interface of a telepresence network
US8836751B2 (en) 2011-11-08 2014-09-16 Intouch Technologies, Inc. Tele-presence system with a user interface that displays different communication links
US9251313B2 (en) 2012-04-11 2016-02-02 Intouch Technologies, Inc. Systems and methods for visualizing and managing telepresence devices in healthcare networks
US8902278B2 (en) 2012-04-11 2014-12-02 Intouch Technologies, Inc. Systems and methods for visualizing and managing telepresence devices in healthcare networks
WO2013176758A1 (en) 2012-05-22 2013-11-28 Intouch Technologies, Inc. Clinical workflows utilizing autonomous and semi-autonomous telemedicine devices
US9361021B2 (en) 2012-05-22 2016-06-07 Irobot Corporation Graphical user interfaces including touchpad driving interfaces for telemedicine devices
JP5893153B2 (en) * 2012-10-01 2016-03-23 日本電信電話株式会社 Encoding method, encoding device, program, and recording medium
US9640194B1 (en) 2012-10-04 2017-05-02 Knowles Electronics, Llc Noise suppression for speech processing based on machine-learning mask estimation
CN106797512B (en) 2014-08-28 2019-10-25 美商楼氏电子有限公司 Method, system and the non-transitory computer-readable storage medium of multi-source noise suppressed
US9978388B2 (en) 2014-09-12 2018-05-22 Knowles Electronics, Llc Systems and methods for restoration of speech components
WO2016123560A1 (en) 2015-01-30 2016-08-04 Knowles Electronics, Llc Contextual switching of microphones
US11862302B2 (en) 2017-04-24 2024-01-02 Teladoc Health, Inc. Automated transcription and documentation of tele-health encounters
US10483007B2 (en) 2017-07-25 2019-11-19 Intouch Technologies, Inc. Modular telehealth cart with thermal imaging and touch screen user interface
US11636944B2 (en) 2017-08-25 2023-04-25 Teladoc Health, Inc. Connectivity infrastructure for a telehealth platform
US10617299B2 (en) 2018-04-27 2020-04-14 Intouch Technologies, Inc. Telehealth cart that supports a removable tablet with seamless audio/video switching

Family Cites Families (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989897A (en) 1974-10-25 1976-11-02 Carver R W Method and apparatus for reducing noise content in audio signals
FR2412987A1 (en) * 1977-12-23 1979-07-20 Ibm France PROCESS FOR COMPRESSION OF DATA RELATING TO THE VOICE SIGNAL AND DEVICE IMPLEMENTING THIS PROCEDURE
JPS5931279B2 (en) 1979-06-19 1984-08-01 日本ビクター株式会社 signal conversion circuit
US4356349A (en) 1980-03-12 1982-10-26 Trod Nossel Recording Studios, Inc. Acoustic image enhancing method and apparatus
US4516258A (en) 1982-06-30 1985-05-07 At&T Bell Laboratories Bit allocation generator for adaptive transform coder
US4535472A (en) 1982-11-05 1985-08-13 At&T Bell Laboratories Adaptive bit allocator
CA1229681A (en) 1984-03-06 1987-11-24 Kazunori Ozawa Method and apparatus for speech-band signal coding
GB8421498D0 (en) 1984-08-24 1984-09-26 British Telecomm Frequency domain speech coding
WO1986003873A1 (en) 1984-12-20 1986-07-03 Gte Laboratories Incorporated Method and apparatus for encoding speech
US4790016A (en) 1985-11-14 1988-12-06 Gte Laboratories Incorporated Adaptive method and apparatus for coding speech
DE3506912A1 (en) 1985-02-27 1986-08-28 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover METHOD FOR TRANSMITTING AN AUDIO SIGNAL
US4646061A (en) 1985-03-13 1987-02-24 Racal Data Communications Inc. Data communication with modified Huffman coding
IL76283A0 (en) 1985-09-03 1986-01-31 Ibm Process and system for coding signals
JP2792853B2 (en) 1986-06-27 1998-09-03 トムソン コンシューマー エレクトロニクス セイルズ ゲゼルシャフト ミット ベシュレンクテル ハフツング Audio signal transmission method and apparatus
US5924060A (en) 1986-08-29 1999-07-13 Brandenburg; Karl Heinz Digital coding process for transmission or storage of acoustical signals by transforming of scanning values into spectral coefficients
DE3629434C2 (en) 1986-08-29 1994-07-28 Karlheinz Dipl Ing Brandenburg Digital coding method
IL80103A0 (en) * 1986-09-21 1987-01-30 Eci Telecom Limited Adaptive differential pulse code modulation(adpcm)system
DE3688980T2 (en) 1986-10-30 1994-04-21 Ibm Method for multi-speed coding of signals and device for carrying out this method.
DE3639753A1 (en) * 1986-11-21 1988-06-01 Inst Rundfunktechnik Gmbh METHOD FOR TRANSMITTING DIGITALIZED SOUND SIGNALS
GB8628046D0 (en) 1986-11-24 1986-12-31 British Telecomm Transmission system
DE3642982A1 (en) 1986-12-17 1988-06-30 Thomson Brandt Gmbh TRANSMISSION SYSTEM
SE458532B (en) * 1987-03-25 1989-04-10 Sandvik Ab TOOLS WITH HEAVY METAL TIP DETERMINED TO ROTABLE IN A CARAVAN
US4860360A (en) 1987-04-06 1989-08-22 Gte Laboratories Incorporated Method of evaluating speech
NL8700985A (en) 1987-04-27 1988-11-16 Philips Nv SYSTEM FOR SUB-BAND CODING OF A DIGITAL AUDIO SIGNAL.
JP2586043B2 (en) 1987-05-14 1997-02-26 日本電気株式会社 Multi-pulse encoder
DE3853899T2 (en) * 1987-07-21 1995-12-21 Matsushita Electric Ind Co Ltd Method and device for coding and decoding a signal.
JPS6450695A (en) 1987-08-21 1989-02-27 Tamura Electric Works Ltd Telephone exchange
DE3805946A1 (en) * 1988-02-25 1989-09-07 Fraunhofer Ges Forschung DEVICE FOR DETERMINING CHARACTERISTIC PARAMETERS FROM THE INPUT AND OUTPUT SIGNALS OF A SYSTEM FOR AUDIO SIGNAL PROCESSING
CA2002015C (en) * 1988-12-30 1994-12-27 Joseph Lindley Ii Hall Perceptual coding of audio signals
US5341457A (en) 1988-12-30 1994-08-23 At&T Bell Laboratories Perceptual coding of audio signals
US5752225A (en) 1989-01-27 1998-05-12 Dolby Laboratories Licensing Corporation Method and apparatus for split-band encoding and split-band decoding of audio information using adaptive bit allocation to adjacent subbands
US5297236A (en) 1989-01-27 1994-03-22 Dolby Laboratories Licensing Corporation Low computational-complexity digital filter bank for encoder, decoder, and encoder/decoder
US5109417A (en) 1989-01-27 1992-04-28 Dolby Laboratories Licensing Corporation Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
US5479562A (en) 1989-01-27 1995-12-26 Dolby Laboratories Licensing Corporation Method and apparatus for encoding and decoding audio information
US5230038A (en) 1989-01-27 1993-07-20 Fielder Louis D Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
US5357594A (en) 1989-01-27 1994-10-18 Dolby Laboratories Licensing Corporation Encoding and decoding using specially designed pairs of analysis and synthesis windows
JPH03117919A (en) 1989-09-30 1991-05-20 Sony Corp Digital signal encoding device
US5185800A (en) * 1989-10-13 1993-02-09 Centre National D'etudes Des Telecommunications Bit allocation device for transformed digital audio broadcasting signals with adaptive quantization based on psychoauditive criterion
US5040217A (en) 1989-10-18 1991-08-13 At&T Bell Laboratories Perceptual coding of audio signals
JP2560873B2 (en) * 1990-02-28 1996-12-04 日本ビクター株式会社 Orthogonal transform coding Decoding method
EP0446037B1 (en) 1990-03-09 1997-10-08 AT&T Corp. Hybrid perceptual audio coding
CN1062963C (en) 1990-04-12 2001-03-07 多尔拜实验特许公司 Adaptive-block-lenght, adaptive-transform, and adaptive-window transform coder, decoder, and encoder/decoder for high-quality audio
US5235671A (en) 1990-10-15 1993-08-10 Gte Laboratories Incorporated Dynamic bit allocation subband excited transform coding method and apparatus
US5274740A (en) 1991-01-08 1993-12-28 Dolby Laboratories Licensing Corporation Decoder for variable number of channel presentation of multidimensional sound fields
SG49883A1 (en) 1991-01-08 1998-06-15 Dolby Lab Licensing Corp Encoder/decoder for multidimensional sound fields
US5218435A (en) * 1991-02-20 1993-06-08 Massachusetts Institute Of Technology Digital advanced television systems
CA2090052C (en) 1992-03-02 1998-11-24 Anibal Joao De Sousa Ferreira Method and apparatus for the perceptual coding of audio signals
US5227788A (en) 1992-03-02 1993-07-13 At&T Bell Laboratories Method and apparatus for two-component signal compression
US5285498A (en) 1992-03-02 1994-02-08 At&T Bell Laboratories Method and apparatus for coding audio signals based on perceptual model
EP0559348A3 (en) 1992-03-02 1993-11-03 AT&T Corp. Rate control loop processor for perceptual encoder/decoder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7613603B2 (en) 2003-06-30 2009-11-03 Fujitsu Limited Audio coding device with fast algorithm for determining quantization step sizes based on psycho-acoustic model

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CA2090160C (en) 1998-10-06

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